NYKB Series
    
		 
    Miniature Circuit Breaker
    
		 
    （1A-125A）
    
		 
    
		 
    
			 Intelligent
			 Convenient
			 Safe
			 Comprehensive
		 
    
	 
    	

    
	
	
    
		
    
			
    PRODUCT OVERVIEW
    
		    
    Miniature circuit breaker is a kind of circuit protection equipment usually used in low-voltage circuits. Its main function is to quickly cut off the circuit when detecting abnormalities of the current (such as overload or short-circuit), so as to protect the electrical equipment and personal safety. It can prevent the damage caused by the circuit overload, short-circuit and other faults, while ensuring the normal operation of the circuit.
    
			
    NYKB series miniature circuit breakers can quickly cut off the power supply when the circuit is abnormal to protect the safety of equipment and personnel. It has stable operating performance and long service life, which is suitable for being installed in places with limited space places with limited space, such as electrical control cabinets, household appliances, etc. A variety of rated currents and rated voltages are optional to meet the needs of different circuits.
    
		
    
		
    
			
		
    	
	
    
	
	
    
		
    
			
    
				
    PRODUCT CHARACTERITICS
    
		   	 	
    NYKB Series Miniature Circuit Breaker
    
				
    
			  
    Efficient current limiting and arc extinguishing capability, safer and clearer isolation function, reliable and stable overcurrent protection performance.
    
			
    
			
    
				
    
					
					
    
						Built-in tripping indication
					    
    More assured operation
    
					
    
				
    
				
    
					
					
    
						Leakage protection function
						
    Safer electricity use
    
					
    
				
    
				
    
					
					
    
						Guide rail mounted
						
    More convenient installation
    
					
    
				
    
			
    
		
    
	
    
	
	
     
		
    
			
    PRODUCT DIVERSITY
    
		    
    A wide range of product specifications provide multiple choices
    
		
    
	    
    
			
    
				
    NYKB1h Series
    
					
			
    
			
    
				
    NYKB2 Series
    
						
			
    
			
    
				
    NYKB3 Series
    
						
			
    
			
    
				
    NYKB5 Series
    
					
			
    
        
    
	
    
	
	
    
		
    
			
    
				Technical Parameters
			
    
		
    
		
    
			
    NYKB1H Series Miniature Circuit Breaker  
    
		    
    
			
    
				
    
					
    
						Model
						Rated currentIn (A) 
						Tripping curve
						 Impulse  withstand  voltage  Uimp(kV)
						Breaking  capacity (kA)
						Rated voltage（V）
						Number  of poles 
						 Modulus  (Multiple of  9mm) 
					
    
					
    
						NYKB1H
						1
						C、D
						4
						6
						AC 230/400 
						1P、2P、 3P、4P
						2、4、6、8 
					
    
					
    
                        NYKB1H
						2
						4
						6
					
    
					
    
                        NYKB1H
						3
						4
						6
					
    
					
    
                        NYKB1H
						4
						4
						6
					
    
					
    
                        NYKB1H
						6
						4
						6
					
    
					
    
                        NYKB1H
						10
						4
						6
					
    
					
    
                        NYKB1H
						16
						4
						6
					
    
					
    
                        NYKB1H
						20
						4
						6
					
    
					
    
                        NYKB1H
						25
						4
						6
					
    
					
    
                        NYKB1H
						32
						4
						6
					
    
					
    
                        NYKB1H
						40
						4
						6
					
    
					
    
                        NYKB1H
						50
						4
						6
					
    
					
    
                        NYKB1H
						63
						4
						6
					
    
				
    
			
     
		
    	
		
    
			
    NYKB1HL Series Miniature Circuit Breaker   
    
		    
    
			
    
				
    
					
    
						Model
						Rated currentIn (A) 
						Tripping curve
						 Impulse  withstand  voltage  Uimp(kV)
						Breaking  capacity (kA)
						Rated voltage（V）
						Number  of poles 
						 Modulus  (Multiple of  9mm) 
						Rated residual  action current (mA)   
					
    
					
    
						NYKB1HL
						6
						C、D
						4
						6
						AC 230/400 
						1P+N、2P、3 P、3P+N、4P 
						5、6、7、8、 10、11、11.5、 13、15 
						30、50、 100、300
					
    
					
    
                        NYKB1HL
						10
						4
						6
					
    
					
    
                        NYKB1HL
						16
						4
						6
					
    
					
    
                        NYKB1HL
						20
						4
						6
					
    
					
    
                        NYKB1HL
						25
						4
						6
					
    
					
    
                        NYKB1HL
						32
						4
						6
					
    
					
    
                        NYKB1HL
						40
						4
						6
					
    
					
    
                        NYKB1HL
						50
						4
						6
					
    
					
    
                        NYKB1HL
						63
						4
						6
					
    
				
    
			
     
		
    
		
    
			
    NYKB2 Series Miniature Circuit Breaker  
    
		    
    
			
    
				
    
					
    
						Model
						Rated currentIn (A) 
						Tripping curve
						Breaking  capacity (kA)
						Rated voltage（V）
						Number  of poles 
						 Modulus  (Multiple of  9mm) 
					
    
					
    
						NYKB2
						6
						C、D
						4.5
						AC 230
						1P+N
						2 
					
    
					
    
						NYKB2
						10
						4.5
					
    
					
    
						NYKB2
						16
						4.5
					
    
					
    
						NYKB2
						20
						4.5
					
    
					
    
						NYKB2
						25
						4.5
					
    
					
    
						NYKB2
						32
						4.5
					
    
				
    
			
     
		
    	
		
    
			
    NYKB2L Series Miniature Circuit Breaker   
    
		    
    
			
    
				
    
					
    
						Model
						Rated currentIn (A) 
						Tripping curve
						Breaking  capacity (kA)
						Rated voltage（V）
						Number  of poles 
						Modulus (Multiple  of 9mm)
						Rated residual  action current (mA)   
					
    
					
    
						NYKB2L
						6
						C、D
						4.5
						AC 230
						1P+N
						4
						30、50、 100、300
					
    
					
    
						NYKB2L
						10
						4.5
					
    
					
    
						NYKB2L
						16
						4.5
					
    
					
    
						NYKB2L
						20
						4.5
					
    
					
    
						NYKB2L
						25
						4.5
					
    
					
    
						NYKB2L
						32
						4.5
					
    
				
    
			
     
		
    	
		
    
			
    NYKB3 Series Miniature Circuit Breaker   
    
		    
    
			
    
				
    
					
    
						Model
						Rated currentIn (A) 
						Instantaneous  tripping current
						 Impulse  withstand  voltage  Uimp(kV)
						Breaking  capacity (kA)
						Rated voltage（V）
						Number  of poles 
						  Modulus  (Multiple  of 9mm) 
					
    
					
    
						NYKB3
						63
						10In、12In
						6
						10
						AC 230/400
						1P、2P、 3P、4P 
						3、6、9、12  
					
    
					
    
						NYKB3
						80
						6
						10
					
    
					
    
						NYKB3
						100
						6
						10
					
    
					
    
						NYKB3
						125
						6
						10
					
    
				
    
			
     
		
    
		
    
			
    NYKB5 Series Miniature Circuit Breaker   
    
		    
    
			
    
				
    
					
    
						Model
						Rated currentIn (A) 
						Tripping curve
						Mechanical life（Times）
						Breaking  capacity (kA)
						Rated voltage（V）
						Number  of poles 
						  Modulus  (Multiple  of 9mm) 
					
    
					
    
						NYKB5
						6
						C、D
						4000
						10
						AC 230/400
						1P、2P、 3P、4P 
						2、4、6、8
					
    
					
    
						NYKB5
						10
						4000
						10
					
    
					
    
						NYKB5
						16
						4000
						10
					
    
					
    
						NYKB5
						20
						4000
						10
					
    
					
    
						NYKB5
						25
						4000
						10
					
    
					
    
						NYKB5
						32
						4000
						10
					
    
					
    
						NYKB5
						40
						4000
						10
					
    
					
    
						NYKB5
						50
						4000
						10
					
    
					
    
						NYKB5
						63
						4000
						10
					
    
				
    
			
     
		
    
		
    
			
    NYKB5L Series Miniature Circuit Breaker    
    
		    
    
			
    
				
    
					
    
						Model
						Rated currentIn (A) 
						Tripping curve
						Mechanical life（Times）
						Breaking  capacity (kA)
						Rated voltage（V）
						Number  of poles 
						Modulus  (Multiple  of 9mm) 
						Rated  residual  action  current(mA) 
					
    
					
    
						NYKB5L
						6
						C、D
						4000
						10
						AC 230/400
						1P+N、2P、3 P、3P+N、4P
						2、4、6、8
						30、50、 100、300
					
    
					
    
						NYKB5L
						10
						4000
						10
					
    
					
    
						NYKB5L
						16
						4000
						10
					
    
					
    
						NYKB5L
						20
						4000
						10
					
    
					
    
						NYKB5L
						25
						4000
						10
					
    
					
    
						NYKB5L
						32
						4000
						10
					
    
					
    
						NYKB5L
						40
						4000
						10
					
    
					
    
						NYKB5L
						50
						4000
						10
					
    
					
    
						NYKB5L
						63
						4000
						10
					
    
				
    
			
     
		
    	
	
    
	
	
    
		
    
			
    
				Selection table
			
    
		
    
		
    
			
    NYKB1H Series Miniature Circuit Breaker  
    
		    
    
			
    
				
    
					
    
						NYKB1H
						3P
						C
						16A
						Additional functions
					
    
					
    
						Product code
						Pole No.
						Tripping characteristics
						Rated current
						Additional functions
					
    
					
    
						NYKB1H： 
    Miniature Circuit Breaker    		
						1P:1 pole
    2P:2 pole
    3P:3 pole
    4P:4 pole    		
						C type
    D type    		1A
    2A
    3A
    4A
    6A
    10A
    16A
    20A
    25A
    32A
    40A
    50A
    63A    		
						SD:Alarm
    OF:Auxiliary
    OF+OF:Double auxiliary
    OF+SD:Auxiliary+Alarm
    MX+OF:Shunt release+Auxiliary
    MV:Overvoltage tripper
    MN:Under-voltage tripper
    MV+MN:Over-voltage and under-voltage trippers    		
					
    
				
    
			
    
		
    
		
    
			
    NYKB1HL Series Miniature Circuit Breaker   
    
		    
    
			
    
				
    
					
    
						NYKB1HL
						3P
						C
						16A
						30mA
						Additional functions
					
    
					
    
						Product code  
						Pole No.
						Tripping characteristics
						Rated current
						Residual current 
						Additional functions
					
    
					
    
						NYKB1HL： 
    Leakage  protection  circuit breaker      		
						1P+N:1 pole+N
    2P:2 pole
    3P+N:3 pole+N
    4P:4 pole    		
						C type
    D type    		6A
    10A
    16A
    20A
    25A
    32A
    40A
    50A
    63A    		
						30mA
    50mA
    100mA
    300mA    		
						SD:Alarm
    OF:Auxiliary
    OF+OF:Double auxiliary
    OF+SD:Auxiliary+Alarm
    MX+OF:Shunt release+Auxiliary
    MV:Overvoltage tripper
    MN:Under-voltage tripper
    MV+MN:Over-voltage and under-voltage trippers    		
					
    
				
    
			
    
		
    
		
    
			
    NYKB2 Series Miniature Circuit Breaker  
    
		    
    
			
    
				
    
					
    
						NYKB2
						1P+N
						C
						16A
					
    
					
    
						Product code
						Pole No.
						Tripping characteristics
						Rated current
					
    
					
    
						NYKB2：
    Miniature Circuit Breaker    		
						1P+N:1 pole+N
						C type
    D type    		
						6A
    10A
    16A
    20A
    25A
    32A    		
					
    
				
    
			
    
		
    
		
    
			
    NYKB2L Series Miniature Circuit Breaker   
    
		    
    
			
    
				
    
					
    
						NYKB2L
						1P+N
						C
						16A
						30mA
					
    
					
    
						Product code  
						Pole No.
						Tripping characteristics
						Rated current
						Residual  current 
					
    
					
    
						NYKB2L：
    Leakage Protection  Circuit Breaker    		
						1P+N:1 pole+N
						C type
    D type    		
						6A
    10A
    16A
    20A
    25A
    32A    		
						30mA
    50mA
    100mA
    300mA    		
					
    
				
    
			
    
		
    
		
    
			
    NYKB3 Series Miniature Circuit Breaker   
    
		    
    
			
    
				
    
					
    
						NYKB3
						3P
						100A
						Additional  functions
					
    
					
    
						Product code
						Pole No.
						Rated current
						Additional  functions
					
    
					
    
						NYKB3：
    Miniature Circuit Breaker    		
						1P:1 pole
    2P:2 pole
    3P:3 pole
    4P:4 pole    		
						63A
    80A
    100A
    125A    		
						SD:Alarm
    OF:Auxiliary
    OF+OF:Double auxiliary
    OF+SD:Auxiliary+Alarm
    MX+OF:Shunt release+Auxiliary
    MV:Overvoltage tripper
    MN:Under-voltage tripper
    MV+MN:Over-voltage and under-voltage trippers    		
					
    
				
    
			
    
		
    
		
    
			
    NYKB5 Series Miniature Circuit Breaker   
    
		    
    
			
    
				
    
					
    
						NYKB5
						3P
						C
						16A
						Additional functions
					
    
					
    
						Product code  
						Pole No.
						Tripping characteristics
						Rated current
						Additional  functions
					
    
					
    
						NYKB5：
    Miniature Circuit Breaker    		
						1P:1 pole
    2P:2 pole
    3P:3 pole
    4P:4 pole    		
						C type
    D type    		
						6A
    10A
    16A
    20A
    25A
    32A
    40A
    50A
    63A    		
						SD:Alarm
    OF:Auxiliary
    OF+OF:Double auxiliary
    OF+SD:Auxiliary+Alarm
    MX+OF:Shunt release+Auxiliary
    MV:Overvoltage tripper
    MN:Under-voltage tripper
    MV+MN:Over-voltage and under-voltage trippers    		
					
    
				
    
			
    
		
    
		
    
			
    NYKB5L Series Miniature Circuit Breaker    
    
		    
    
			
    
				
    
					
    
						NYKB5L
						3P
						C
						16A
						30mA
						Additional functions
					
    
					
    
						Product code
						Pole No.
						Tripping characteristics
						Rated current
						Residual  current 
						Additional  functions
					
    
					
    
						NYKB5L：
    Leakage  Protection  Circuit Creaker      		
						1P+N:1 pole+N
    2P:2 pole
    3P+N:3 pole+N
    4P:4 pole    		
						C type
    D type    		6A
    10A
    16A
    20A
    25A
    32A
    40A
    50A
    63A    		
						30mA
    50mA
    100mA
    300mA    		
						SD:Alarm
    OF:Auxiliary
    OF+OF:Double auxiliary
    OF+SD:Auxiliary+Alarm
    MX+OF:Shunt release+Auxiliary
    MV:Overvoltage tripper
    MN:Under-voltage tripper
    MV+MN:Over-voltage and under-voltage trippers    		
					
    
				
    
			
    
		
    
	
    
	
	
    
			
    
				
    
			       
    
				       Technical Parameters
			       
    
		        
    
				

    
				
    
					
    
						
    
							
    
								
							
    
						
    
						
    
							
    
								
      
									
    • 
										
      
											
      Model：NYKB1H
      
											
      Rated currentIn (A)：1、2、3、4、10、16、20、25、32、40、50、63
      
											
      Tripping curve：C、D
      
											
       Impulse  withstand  voltage   Uimp(kV)：4
      
											
      Breaking  capacity (kA)：6
      
											
      Rated voltage（V）：AC 230/400
      
											
      Number  of poles ：1P、2P、 3P、4P
      
											
       Modulus  (Multiple of  9mm) ：2、4、6、8 
      
										
      
									
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    • 
										
      
											
      Model：NYKB1HL
      
											
      Rated currentIn (A)：6、10、16、20、25、32、40、50、63
      
											
      Tripping curve：C、D
      
											
       Impulse  withstand  voltage   Uimp(kV)：4
      
											
      Breaking  capacity (kA)：6
      
											
      Rated voltage（V）：AC 230/400
      
											
      Number  of poles ：1P+N、2P、3 P、3P+N、4P 
      
											
       Modulus  (Multiple of  9mm) ：5、6、7、8、 10、11、11.5、 13、15  
      
											
      Rated residual  action current (mA)   ：30、50、 100、300
      
										
      
									
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    • 
										
      
											
      Model：NYKB2
      
											
      Rated currentIn (A)：6、10、16、20、25、32
      
											
      Tripping curve：C、D
      
											
      Breaking  capacity (kA)：4.5
      
											
      Rated voltage（V）：AC 230
      
											
      Number  of poles ：1P+N
      
											
      Modulus  (Multiple  of 9mm) ：2
      
										
      
									
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    • 
										
      
											
      Model：NYKB2L
      
											
      Rated currentIn (A)：6、10、16、20、25、32
      
											
      Tripping curve：C、D
      
											
      Breaking  capacity (kA)：4.5
      
											
      Rated voltage（V）：AC 230
      
											
      Number  of poles ：1P+N
      
											
      Modulus  (Multiple  of 9mm) ：4
      
											
      Rated residual  action current (mA)   ：30、50、 100、300
      
										
      
									
      • 
								
    
							
    
						
    
					
    
					
    
						
    
							
    
								
							
    
						
    
						
    
							
    
								
      
									
    • 
										
      
											
      Model：NYKB3
      
											
      Rated currentIn (A)：63、80、100、125
      
											
      Instantaneous  tripping current：10In、12In
      
											
       Impulse  withstand  voltage  Uimp(kV)：6
      
											
      Breaking  capacity (kA)：10
      
											
      Rated voltage（V）：AC 230/400
      
											
      Number  of poles ：1P、2P、 3P、4P
      
											
        Modulus  (Multiple  of 9mm) ：3、6、9、12 
      
										
      
									
      • 
								
    
							
    
						
    
					
    
					
    
						
    
							
    
								
							
    
						
    
						
    
							
    
								
      
									
    • 
										
      
											
      Model：NYKB5
      
											
      Rated currentIn (A)：6、10、16、20、25、32、40、50、63
      
											
      Tripping curve：C、D
      
											
      Mechanical life（Times）：4000
      
											
      Breaking  capacity (kA)：10
      
											
      Rated voltage（V）：AC 230/400
      
											
      Number  of poles ：1P、2P、 3P、4P
      
											
      Modulus  (Multiple of  9mm) ：2、4、6、8 
      
											
      Rated residual  action current (mA)   ：30、50、 100、300
      
										
      
									
      • 
								
    
							
    
						
    
					
    
					
    
						
    
							
    
								
							
    
						
    
						
    
							
    
								
      
									
    • 
										
      
											
      Model：NYKB5L
      
											
      Rated currentIn (A)：6、10、16、20、25、32、40、50、63
      
											
      Tripping curve：C、D
      
											
      Mechanical life（Times）：4000
      
											
      Breaking  capacity (kA)：10
      
											
      Rated voltage（V）：AC 230/400
      
											
      Number of poles ：1P+N、2P、 3P+N、4P
      
											
      Modulus (Multiple of  9mm) ：2、4、6、8 
      
											
      Rated residual  action current (mA)：30、50、 100、300
      
										
      
									
      • 
								
    
							
    
						
    
					
    
				
    
			
    
		
    
	
	
    
			
    
				
    
			       
    
				       Selection table 
			       
    
		        
    
				

    
				
    
					
    
						
    
							
    
								
							
    
						
    
						
    
							
    
								
      
									
    • 
										
      
											
      Product code  ：NYKB1H：Miniature Circuit Breaker
      
											
      Pole No.：1P:1 pole、2P:2 pole、3P:3 pole、4P:4 pole
      
											
      Tripping characteristics：C type、D type
      
											
      Rated current：1A、2A、3A、4A、6A、10A、16A、20A、25A、32A、40A、50A、63A
      
											
      Additional  functions：SD:Alarm、OF:Auxiliary、OF+OF:Double auxiliary、OF+SD:Auxiliary+Alarm、MX+OF:Shunt release+Auxiliary、MV:Overvoltage tripper、MN:Under-voltage tripper、MV+MN:Over-voltage and under-voltage trippers
      
										
      
									
      • 
								
    
							
    
						
    
					
    
				
    
						
    
							
    
								
							
    
						
    
						
    
							
    
								
      
									
    • 
										
      
											
      Product code：NYKB1HL：Leakage  protection  circuit breaker  
      
											
      Pole No.：1P+N:1 pole+N、2P:2 pole、3P+N:3 pole+N、4P:4 pole
      
											
      Tripping characteristics：C type、D type
      
											
      Rated current：6A、10A、16A、20A、25A、32A、40A、50A、63A
      
											
      Residual current ：30mA、50mA、100mA、300mA
      
											
      Additional functions：SD:Alarm、OF:Auxiliary、OF+OF:Double auxiliary、OF+SD:Auxiliary+Alarm、MX+OF:Shunt release+Auxiliary、MV:Overvoltage tripper、MN:Under-voltage tripper、MV+MN:Over-voltage and under-voltage trippers
      
										
      
									
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    • 
										
      
											
      Product code  ：NYKB2：Miniature Circuit Breaker
      
											
      Pole No.：1P+N:1 pole+N
      
											
      Tripping characteristics：C type、D type
      
											
      Rated current：6A、10A、16A、20A、25A、32A
      
										
      
									
      • 
								
    
							
    
						
    
					
    
				
    
						
    
							
    
								
							
    
						
    
						
    
							
    
								
      
									
    • 
										
      
											
      Product code ：NYKB2L:  Leakage Protection  Circuit Breaker
      
											
      Pole No.：1P+N:1 pole+N
      
											
      Tripping characteristics：C type、D type
      
											
      Rated current：6A、10A、16A、20A、25A、32A
      
										
      
									
      • 
								
    
							
    
						
    
					
    
				
    
						
    
							
    
								
							
    
						
    
						
    
							
    
								
      
									
    • 
										
      
											
      Product code  ：NYKB3：Miniature Circuit Breaker
      
											
      Pole No.：1P:1 pole、2P:2 pole、3P:3 pole、4P:4 pole
      
											
      Rated current：63A、80A、100A、125A
      
											
      Additional  functions：SD:Alarm、OF:Auxiliary、OF+OF:Double auxiliary、OF+SD:Auxiliary+Alarm、MX+OF:Shunt release+Auxiliary、MV:Overvoltage tripper、MN:Under-voltage tripper、MV+MN:Over-voltage and under-voltage trippers
      
										
      
									
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      Product code  ：NYKB5：Miniature Circuit Breaker
      
											
      Pole No.：1P:1 pole、2P:2 pole、3P:3 pole、4P:4 pole
      
											
      Tripping characteristics：C type、D type
      
											
      Rated current：6A、10A、16A、20A、25A、32A、40A、50A、63A
      
											
      Additional  functions：SD:Alarm、OF:Auxiliary、OF+OF:Double auxiliary、OF+SD:Auxiliary+Alarm、MX+OF:Shunt release+Auxiliary、MV:Overvoltage tripper、MN:Under-voltage tripper、MV+MN:Over-voltage and under-voltage trippers
      
										
      
									
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      Product code  ：NYKB5L：NYKB5L:  Leakage  Protection  Circuit Creaker
      
											
      Pole No.：1P+N:1 pole+N、2P:2 pole、3P+N:3 pole+N、4P:4 pole
      
											
      Tripping characteristics：C type、D type
      
											
      Rated current：6A、10A、16A、20A、25A、32A、40A、50A、63A
      
											
      Residual  current ：30mA、50mA、100mA、300mA
      
											
      Additional  functions：SD:Alarm、OF:Auxiliary、OF+OF:Double auxiliary、OF+SD:Auxiliary+Alarm、MX+OF:Shunt release+Auxiliary、MV:Overvoltage tripper、MN:Under-voltage tripper、MV+MN:Over-voltage and under-voltage trippers
      
										
      
									
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