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Home >  UL1077 Supplementary Circuit Breakers > Standard UL1077 Circuit Breakers

Standard UL1077 DIN Rail Mount Circuit Breakers




ASI's best selling UL1077 MCB Circuit Breakers provide proven supplementary protection for downstream applications. They are tested 300% (3 times at 100%) and are designed to protect the cable or wire in the event of an overvoltage or undervoltage or short circuit. The NDB2 UL1077/ CSA C22.2 No. 235 miniature circuit breakers offer superior 10kA interrupt capacity, are available in 1, 2 and 3 poles, range from 1 to 63 amps, offer C and D Trip Curves, have visual trip indication, are RoHS compliant and are measure the standard 18mm wide.


View Associated Products Below to Complete Your Project
Catalog No. / Description 
NDB2-63C1-1 Product
Standard DIN Rail Mounted AC Circuit Breaker,
1 Pole,
UL1077 Recognized,
C Trip Curve
  • Superior 10kA Interrupt Capacity
  • DIN Rail Mounting
  • One, Two and Three Pole Versions
  • UL1077
  • Easy to Wire, Screw-Clamp Connections
Standard DIN Rail Mounted AC Circuit Breaker, 1 pole, UL1077 Recognized, C Trip Curve, 1 amp 
List Price
$10.94 each
 
Volume Pricing
Available
Green Check In Stock
50 amp 
List Price
$10.94 each
 
Volume Pricing
Available
Green Check In Stock
2 amp 
List Price
$10.94 each
 
Volume Pricing
Available
Green Check In Stock
4 Amp 
List Price
$10.94 each
 
Volume Pricing
Available
Green Check In Stock
6 amp 
List Price
$10.94 each
 
Volume Pricing
Available
Green Check In Stock
10 Amp 
List Price
$10.20 each
 
Volume Pricing
Available
Green Check In Stock
16 Amp 
List Price
$10.21 each
 
Volume Pricing
Available
Green Check In Stock
20 Amp 
List Price
$10.20 each
 
Volume Pricing
Available
Green Check In Stock
25 amp 
List Price
$10.41 each
 
Volume Pricing
Available
Green Check In Stock
32 amp 
List Price
$10.41 each
 
Volume Pricing
Available
Green Check In Stock
40 Amp 
List Price
$10.94 each
 
Volume Pricing
Available
Green Check In Stock
63 amp 
List Price
$12.17 each
 
Volume Pricing
Available
Green Check In Stock
 One Pole - D Trip CurveNext 
NDB2-63D1-1 Product
Standard DIN Rail Mounted AC Circuit Breaker,
1 Pole,
UL1077 Recognized,
D Trip Curve
  • Superior 10kA Interrupt Capacity
  • Time delay, for use with high inrush loads
  • DIN Rail Mounting
  • One, Two and Three Pole Versions
  • UL1077
  • Easy-to-Wire, Screw-Clamp Connections
1 amp 
List Price
$10.94 each
 
Volume Pricing
Available
Green Check In Stock
2 amp 
List Price
$13.71 each
 
Volume Pricing
Available
Green Check In Stock
4 amp 
List Price
$13.70 each
 
Volume Pricing
Available
Green Check In Stock
6 amp 
List Price
$13.26 each
 
Volume Pricing
Available
Green Check In Stock
10 amp 
List Price
$11.87 each
 
Volume Pricing
Available
Green Check In Stock
20 amp 
List Price
$10.20 each
 
Volume Pricing
Available
Green Check In Stock
25 amp 
List Price
$10.41 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
32 amp 
List Price
$12.34 each
 
Volume Pricing
Available
Green Check In Stock
40 amp 
List Price
$10.94 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
50 amp 
List Price
$10.94 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
63 amp 
List Price
$12.17 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
 Two Pole- C Trip CurveNext / Top 
NDB2-63C1-2 Product
Standard DIN Rail Mounted AC Circuit Breaker,
2 Pole,
UL1077 Recognized,
C Trip Curve
  • Superior 10kA Interrupt Capacity
  • DIN Rail Mounting
  • One, Two and Three Pole Versions
  • UL1077
  • Easy to Wire, Screw-Clamp Connections
1 amp 
List Price
$22.13 each
 
Volume Pricing
Available
Green Check In Stock
2 amp 
List Price
$22.13 each
 
Volume Pricing
Available
Green Check In Stock
4 amp 
List Price
$22.13 each
 
Volume Pricing
Available
Green Check In Stock
6 amp 
List Price
$22.81 each
 
Volume Pricing
Available
Green Check In Stock
10 amp 
List Price
$21.13 each
 
Volume Pricing
Available
Green Check In Stock
16 amp 
List Price
$21.13 each
 
Volume Pricing
Available
Green Check In Stock
20 amp 
List Price
$21.13 each
 
Volume Pricing
Available
Green Check In Stock
25 amp 
List Price
$21.45 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
32 amp 
List Price
$21.45 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
40 amp 
List Price
$21.63 each
 
Volume Pricing
Available
Green Check In Stock
50 amp 
List Price
$21.63 each
 
Volume Pricing
Available
Green Check In Stock
63 amp 
List Price
$23.32 each
 
Volume Pricing
Available
Green Check In Stock
 B-Curve 2 Pole Next / Top 
NDB2-63B10-2 Product
Standard DIN Rail Mounted Circuit Breaker,
2 Pole,
UL1077 Recognized,
B Trip Curve
  • Superior 10kA Interrupt Capacity
  • DIN Rail Mounting
  • One, Two and Three Pole Versions
  • UL1077
  • Easy to Wire, Screw-Clamp Connections
10 amp 
List Price
$41.51 each
 
Volume Pricing
Available
Closeout Item
 Two Pole - D Trip CurveNext / Top 
NDB2-63D1-2 Product
Standard DIN Rail Mounted AC Circuit Breaker,
2 Pole,
UL1077 Recognized,
D Trip Curve
  • Superior 10kA Interrupt Capacity
  • Time delay, for use with high inrush loads
  • DIN Rail Mounting
  • One, Two and Three Pole Versions
  • UL1077
  • Easy-to-Wire, Screw-Clamp Connections
1 amp 
List Price
$22.13 each
 
Volume Pricing
Available
Green Check In Stock
2 amp 
List Price
$22.13 each
 
Volume Pricing
Available
Green Check In Stock
4 amp 
List Price
$22.13 each
 
Volume Pricing
Available
Green Check In Stock
6 amp 
List Price
$22.79 each
 
Volume Pricing
Available
Green Check In Stock
10 amp 
List Price
$21.13 each
 
Volume Pricing
Available
Green Check In Stock
16 amp 
List Price
$21.13 each
 
Volume Pricing
Available
Green Check In Stock
20 amp 
List Price
$21.13 each
 
Volume Pricing
Available
Green Check In Stock
25 amp 
List Price
$21.45 each
 
Volume Pricing
Available
Green Check In Stock
32 amp 
List Price
$21.45 each
 
Volume Pricing
Available
Green Check In Stock
40 amp 
List Price
$21.63 each
 
Volume Pricing
Available
Green Check In Stock
50 amp 
List Price
$21.63 each
 
Volume Pricing
Available
Green Check In Stock
63 amp 
List Price
$23.32 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
 Three Pole- B Trip CurveNext / Top 
NDB2-63B4-3 Product
Standard DIN Rail Mounted AC Circuit Breaker,
3 Pole,
UL1077 Recognized,
B Trip Curve
  • Superior 10kA Interrupt Capacity
  • DIN Rail Mounting
  • One, Two and Three Pole Versions
  • UL1077
  • Easy to Wire, Screw-Clamp Connections
4 amp 
List Price
$22.13 each
 
Volume Pricing
Available
Green Check In Stock
 Three Pole- C Trip CurveNext / Top 
NDB2-63C1-3 Product
Standard DIN Rail Mounted AC Circuit Breaker,
3 Pole,
UL1077 Recognized,
C Trip Curve
  • Superior 10kA Interrupt Capacity
  • DIN Rail Mounting
  • One, Two and Three Pole Versions
  • UL1077
  • Easy to Wire, Screw-Clamp Connections
1 amp 
List Price
$36.90 each
 
Volume Pricing
Available
Green Check In Stock
2 amp 
List Price
$36.90 each
 
Volume Pricing
Available
Green Check In Stock
4 amp 
List Price
$36.90 each
 
Volume Pricing
Available
Green Check In Stock
6 amp 
List Price
$36.90 each
 
Volume Pricing
Available
Green Check In Stock
10 amp 
List Price
$36.02 each
 
Volume Pricing
Available
Green Check In Stock
16 amp 
List Price
$36.02 each
 
Volume Pricing
Available
Green Check In Stock
20 amp 
List Price
$36.02 each
 
Volume Pricing
Available
Green Check In Stock
25 amp 
List Price
$36.11 each
 
Volume Pricing
Available
Green Check In Stock
32 amp 
List Price
$36.14 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
40 amp 
List Price
$36.90 each
 
Volume Pricing
Available
Green Check In Stock
50 amp 
List Price
$36.93 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
63 amp 
List Price
$39.64 each
 
Volume Pricing
Available
Green Check In Stock
 Three Pole - D Trip CurveNext / Top 
NDB2-63D1-3 Product
Standard DIN Rail Mounted AC Circuit Breaker,
3 Pole,
UL1077 Recognized,
D Trip Curve
  • Superior 10kA Interrupt Capacity
  • DIN Rail Mounting
  • One, Two and Three Pole Versions
  • UL1077
  • Easy to Wire, Screw-Clamp Connections
1 amp 
List Price
$44.99 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
2 Amp 
List Price
$44.99 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
4 amp 
List Price
$44.99 each
 
Volume Pricing
Available
Green Check In Stock
6 amp 
List Price
$44.33 each
 
Volume Pricing
Available
Green Check In Stock
10 amp 
List Price
$42.62 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
16 amp 
List Price
$42.62 each
 
Volume Pricing
Available
Green Check In Stock
20 amp 
List Price
$42.62 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
25 amp 
List Price
$43.94 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
32 amp 
List Price
$43.94 each
 
Volume Pricing
Available
Closeout Item
40 amp 
List Price
$44.33 each
 
Volume Pricing
Available
Green Check In Stock
50 amp 
List Price
$41.18 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
63 Amp 
List Price
$43.81 each
 
Volume Pricing
Available
Ships Stock - 4 weeks
 Top 

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