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DIN-Rail Mount AC Branch Circuit Breakers



Use these circuit breakers upstream from small transformers, lighting, and control circuits. They meet UL 489 requirements for branch circuit protection. All are thermal/magnetic—breakers trip when heat is generated by sustained, low-level overload current, but will trip quickly when the magnetic field in the coil senses a high-current short circuit. Mount directly to DIN rail.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
Alarm (sold separately) sends an audible signal when the breaker is tripped.
For technical drawings and 3-D models, click on a part number.
Voltage | Frequency, Hz | Breakthrough Current | For DIN Rail Size, mm | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Features | Specifications Met | Current, A | Each | |
1 Pole—Toggle Style | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
277V AC | 50/60 | 10,000 A @ 277 V AC | 35 | Screw-Clamp Terminals | 4.13" | 0.7" | 2.36" | -4° to 140° | Time Delay Trip | UL 489, CSA Certified | 5 | 000000 | 000000 |
2 Pole—Toggle Style | |||||||||||||
277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 1.39" | 2.36" | -4° to 140° | Time Delay Trip | UL 489, CSA Certified | 5 | 000000 | 000000 |
3 Pole—Toggle Style | |||||||||||||
277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -4° to 140° | Time Delay Trip | UL 489, CSA Certified | 5 | 000000 | 000000 |

Current | Includes | Each | |
0.5 A @ 110 V DC, 2 A @ 250 V AC | Two Sets of Auxillary Contacts | 0000000 | 000000 |
High-Inrush DIN-Rail Mount AC Branch Circuit Breakers
Able to handle high inrush current caused by equipment startup, use these circuit breakers upstream from motors and larger transformer applications. They meet UL 489 requirements for branch circuit protection. All are thermal/magnetic—breakers trip when heat is generated by sustained, low-level overload current, but will trip quickly when the magnetic field in the coil senses a high-current short circuit. Mount directly to DIN rail.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
Alarm (sold separately) sends an audible signal when the breaker is tripped.
For technical drawings and 3-D models, click on a part number.



Voltage | Frequency, Hz | Breakthrough Current | For DIN Rail Size, mm | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Features | Specifications Met | Current, A | Each | |
1 Pole—Toggle Style | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
277V AC | 50/60 | 10,000 A @ 277 V AC | 35 | Screw-Clamp Terminals | 4.13" | 0.7" | 2.36" | -40° to 165° | Time Delay Trip | UL 489, CSA Certified, IEC European Standards | 5 | 000000 | 000000 |
2 Pole—Toggle Style | |||||||||||||
277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 1.39" | 2.36" | -40° to 165° | Time Delay Trip | UL 489, CSA Certified, IEC European Standards | 5 | 000000 | 000000 |
3 Pole—Toggle Style | |||||||||||||
277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -40° to 165° | Time Delay Trip | UL 489, CSA Certified, IEC European Standards | 5 | 000000 | 000000 |
Current | Includes | Each | |
0.5 A @ 110 V DC, 2 A @ 250 V AC | Two Sets of Auxillary Contacts | 0000000 | 000000 |
DIN-Rail Mount AC Equipment Circuit Breakers
These circuit breakers meet UL 1077 requirements for supplemental circuit protection and are designed for use downstream of a branch circuit breaker. Use them with small transformers, lighting, and control circuits. All are thermal/magnetic—breakers trip when heat is generated by sustained, low-level overload current, but will trip quickly when the magnetic field in the coil senses a high-current short circuit. Mount directly to DIN rail.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
Alarm (sold separately) sends an audible signal when the breaker is tripped.
For technical drawings and 3-D models, click on a part number.



Voltage | Frequency, Hz | Breakthrough Current | For DIN Rail Size, mm | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Features | Specifications Met | Current, A | Each | |
1 Pole—Toggle Style | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
277V AC | 50/60 | 5,000 A @ 277 V AC | 35 | Screw-Clamp Terminals | 3.15" | 0.7" | 2.36" | -40° to 165° | Time Delay Trip | UL 1077, CSA Certified, CE Marked | 5 | 000000 | 000000 |
2 Pole—Toggle Style | |||||||||||||
277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 1.4" | 2.36" | -40° to 165° | Time Delay Trip | UL 1077, CSA Certified, CE Marked | 5 | 000000 | 00000 |
3 Pole—Toggle Style | |||||||||||||
277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.1" | 2.36" | -40° to 165° | Time Delay Trip | UL 1077, CSA Certified, CE Marked | 5 | 000000 | 000000 |
Current | Includes | Each | |
0.5 A @ 110 V DC, 2 A @ 250 V AC | Two Sets of Auxillary Contacts | 0000000 | 000000 |
High-Inrush DIN-Rail Mount AC Equipment Circuit Breakers
Able to handle high inrush currents caused by equipment startup, these circuit breakers are suitable for motor and larger transformer applications. They meet UL 1077 requirements for supplemental circuit protection and are designed for use downstream of a branch circuit breaker. All are thermal/magnetic—breakers trip when heat is generated by sustained, low-level overload current, but will trip quickly when the magnetic field in the coil senses a high-current short circuit. Mount directly to DIN rail.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
Alarm (sold separately) sends an audible signal when the breaker is tripped.
For technical drawings and 3-D models, click on a part number.



Voltage | Frequency, Hz | Breakthrough Current | For DIN Rail Size, mm | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Features | Specifications Met | Current, A | Each | |
1 Pole—Toggle Style | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
277V AC | 50/60 | 5,000 A @ 277 V AC | 35 | Screw-Clamp Terminals | 3.15" | 0.7" | 2.36" | 25° to 100° | Time Delay Trip | UL 1077, CSA Certified, CE Marked, IEC European Standards | 5 | 000000 | 000000 |
2 Pole—Toggle Style | |||||||||||||
277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 1.4" | 2.36" | 25° to 100° | Time Delay Trip | UL 1077, CSA Certified, CE Marked, IEC European Standards | 5 | 000000 | 00000 |
3 Pole—Toggle Style | |||||||||||||
277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.1" | 2.36" | 25° to 100° | Time Delay Trip | UL 1077, CSA Certified, CE Marked, IEC European Standards | 5 | 000000 | 000000 |
Current | Includes | Each | |
0.5 A @ 110 V DC, 2 A @ 250 V AC | Two Sets of Auxillary Contacts | 0000000 | 000000 |
Vibration-Resistant Blade-Style DC Circuit Breakers

These circuit breakers resist vibration better than standard low-voltage DC circuit breakers. They protect against overload and short circuits in low-voltage automotive and other electronic applications. Use them to replace type ATC, AT, ATO, and 257 blade-style fuses. All are thermal, so they use the heat generated in overcurrent situations to trip the breaker.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
For technical drawings and 3-D models, click on a part number.
Voltage | Breakthrough Current | Mounting Location | Ht. | Wd. | Blade Ht. | Temp. Range, °F | Environmental Rating | Specifications Met | Current, A | Each | |
Push Button Style | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
48V DC | 2,000 A @ 48 V DC | Fuse Block | 1.5" | 0.87" | 0.25" | -40° to 185° | IP40 | SAE J553 | 5 | 000000 | 000000 |
Blade-Style High-Voltage DC Circuit Breakers
Rated to 72V DC, these can handle higher voltages than any other DC circuit breaker we offer. Use these circuit breakers in place of type ATC, AF, ATO, and 257 blade-style fuses to protect against overload and short circuits in low-voltage automotive and electronic applications. All are thermal, so they use the heat generated in overcurrent situations to trip the breaker.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
DIN-rail mount holder is required (sold separately) to mount circuit breakers to DIN-rail.

Voltage | Breakthrough Current | Mounting Location | Ht. | Wd. | Blade Ht. | Temp. Range, °F | Specifications Met | Current, A | Each | |
72V DC | 2,000 A @ 72 V DC | Fuse Block | 2.06" | 0.96" | 0.25" | 0° to 140° | CSA Certified, UL Recognized Component, UL 1077 | 5 | 000000 | 000000 |
For DIN Rail Size, mm | Wire Connection Type | Each | |
35 | Screw-Clamp Terminals | 000000 | 000000 |
Panel-Mount AC/DC Circuit Breakers
In addition to protecting equipment, these circuit breakers can be used as on/off switches. Able to handle high inrush current found in motor start-ups. They meet UL 1077 requirements for supplemental circuit protection and are designed for use downstream of a branch circuit breaker. All are thermal, so they use the heat generated in overcurrent situations to trip the breaker.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
Covers for rocker style breakers (sold separately) provide IP54 protection against limited dust and splashed water.
Covers for push-button style breakers (sold separately) provide IP65 protection against water projected from a nozzle.
For technical drawings and 3-D models, click on a part number.

For Panel Cutout | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
No. of Poles | Voltage | Frequency, Hz | Breakthrough Current | Ht. | Wd. | Dp. Behind Panel | Mounting Fasteners Included | Quick-Disconnect Tab Wd. | Temp. Range, °F | Specifications Met | Current, A | Each | |
1 | 240V AC/60V DC | 50/60 | 1,000 A @ 60 V DC 1,000 A @ 240 V AC | 1.98" | 0.99" | 1.96" | No | 0.25" | 15° to 130° | UL 1077, UL Recognized Component, CSA Certified | 5 | 000000 | 000000 |
2 | 240V AC/60V DC | 50/60 | 1,000 A @ 60 V DC 1,000 A @ 240 V AC | 1.98" | 0.99" | 1.96" | No | 0.25" | 15° to 130° | UL 1077, UL Recognized Component, CSA Certified | 5 | 000000 | 00000 |

For Panel Cutout | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
No. of Poles | Voltage | Frequency, Hz | Breakthrough Current | Ht. | Wd. | Dp. Behind Panel | Quick-Disconnect Tab Wd. | Temp. Range, °F | Specifications Met | Current, A | Each | |
1 | 240V AC/60V DC | 50/60 | 1,000 A @ 60 V DC 1,000 A @ 240 V AC | 1.77" | 0.85" | 1.75" | 0.25" | 15° to 130° | UL 1077, UL Recognized Component, CSA Certified | 5 | 000000 | 000000 |
2 | 240V AC/60V DC | 50/60 | 1,000 A @ 60 V DC 1,000 A @ 240 V AC | 1.77" | 0.85" | 1.75" | 0.25" | 15° to 130° | UL 1077, UL Recognized Component, CSA Certified | 5 | 000000 | 00000 |

No. of Poles | Voltage | Frequency, Hz | For Panel Cutout Dia. | Dp. Behind Panel | Quick-Disconnect Tab Wd. | Temp. Range, °F | Specifications Met | Current, A | Each | |
1 | 250V AC/75V DC | 50/60 | 1/4" | 2.42" | 0.25" | -20° to 140° | UL Recognized Component | 5 | 000000 | 000000 |
High-Temperature Panel-Mount AC/DC Circuit Breakers


These magnetic circuit breakers are unaffected by temperature changes so they are suitable for high-temperature environments. They trip when the magnetic field in the coil increases from current overload.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
2-pole circuit breakers require one panel cutout for each pole.
For technical drawings and 3-D models, click on a part number.
For Panel Cutout | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Voltage | Frequency, Hz | Breakthrough Current | Temp. Range, °F | Dia. | Dp. Behind Panel | Wire Connection Type | Quick-Disconnect Tab Wd. | Ht. | Wd. | Current, A | Each | |
1 Pole—Toggle Style | ||||||||||||
277V AC/80V DC | 50/60 | 5,000 A @ 277 V AC 7,500 A @ 80 V DC | -40° to 185° | 0.63" | 2" | Quick-Disconnect Terminals | 0.25" | 2" | 0.75" | 5 | 00000000 | 000000 |
2 Pole—Toggle Style | ||||||||||||
277V AC/80V DC | 50/60 | 5,000 A @ 277 V AC 7,500 A @ 80 V DC | -40° to 185° | 0.63" | 2" | Quick-Disconnect Terminals | 0.25" | 2" | 1.5" | 5 | 0000000 | 00000 |