DIN-Rail Mount Circuit Breakers

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	Current Current

1/4A

1/2A

	Number of Poles Number of Poles

	Mounting Location Mounting Location

DIN Rail

Fuse Block

	Frequency Frequency

50Hz

60Hz

	Voltage Voltage

277V AC

72V DC

480YV AC

	Specifications Met Specifications Met

CSA

CE Marked

IEC

	Circuit Breaker Type Circuit Breaker Type

Thermal

Magnetic

	Breakthrough Current Breakthrough Current

	Maximum Temperature Maximum Temperature

100° F

140° F

165° F

	Manual Reset Style Manual Reset Style


Toggle	Push Button

	Height Height

2.06"

3.15"

4.13"

	Minimum Temperature Minimum Temperature

	Width Width

	Depth Depth

2.36"

2.73"

	Manufacturer Fuse Equivalent Manufacturer Fuse Equivalent

257

ATC

ATO

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16 Products

DIN-Rail Mount AC Branch Circuit Breakers

1 Pole Circuit Breaker

2 Pole Circuit Breaker

3 Pole Circuit Breaker

4 Pole Circuit Breaker

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.

1 Pole—Toggle Style
Voltage	Frequency, Hz	Breakthrough Current	For DIN Rail Size, mm	Wire Connection Type	Ht.	Wd.	Dp.	Temp. Range, °F	Features	Specifications Met	Choose a Current, A		Each
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	1/2, 1, 1 1/2, 2, 3, 4, 5, 6, 7, 8, 10, 13, 15, 16, 20, 25, 30, 32	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	1/2, 1, 1 1/2, 2, 3, 4, 5, 6, 7, 8, 10, 13, 15, 16, 20, 25, 30, 32	000000	00000
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	1/2, 1, 1 1/2, 2, 3, 4, 5, 6, 7, 8, 10, 13, 15, 16, 20, 25, 30, 32	000000	00000
4 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"	2.79"	2.36"	-4° to 140°	Time Delay Trip	UL 489, CSA Certified	1, 2, 3, 4, 5, 6, 7, 8, 10, 13, 15, 16, 20, 25, 30, 32	0000000	000000

Alarms

Alarm

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.

1 Pole

2 Pole

3 Pole

1 Pole—Toggle Style
Voltage	Frequency, Hz	Breakthrough Current	For DIN Rail Size, mm	Wire Connection Type	Ht.	Wd.	Dp.	Temp. Range, °F	Features	Specifications Met	Choose a Current, A		Each
277V AC	50/60	10,000 A @ 277 V AC	35	Screw-Clamp Terminals	4.13"	0.7"	2.36"	25° to 100°	Time Delay Trip	UL 489, CSA Certified, IEC European Standards	2, 3, 5, 10, 15, 20	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"	25° to 100°	Time Delay Trip	UL 489, CSA Certified, IEC European Standards	2, 3, 5, 10, 15, 20	000000	00000
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"	25° to 100°	Time Delay Trip	UL 489, CSA Certified, IEC European Standards	2, 3, 5, 10, 15, 20	000000	00000

Alarms

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.

1 Pole

2 Pole

3 Pole

1 Pole—Toggle Style
Voltage	Frequency, Hz	Breakthrough Current	For DIN Rail Size, mm	Wire Connection Type	Ht.	Wd.	Dp.	Temp. Range, °F	Features	Specifications Met	Choose a Current, A		Each
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	1, 2, 3, 4, 5, 10, 15, 20, 30	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, 10, 15, 20	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, 10, 15, 20, 30, 40, 50	000000	00000

Alarms

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.

1 Pole

2 Pole

3 Pole

1 Pole—Toggle Style
Voltage	Frequency, Hz	Breakthrough Current	For DIN Rail Size, mm	Wire Connection Type	Ht.	Wd.	Dp.	Temp. Range, °F	Features	Specifications Met	Choose a Current, A		Each
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	2, 3, 5, 10, 15, 20, 40	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	2, 3, 5, 10, 15, 20, 40	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	2, 3, 5, 10, 15, 20, 40	000000	00000

Alarms

Current	Includes		Each
0.5 A @ 110 V DC, 2 A @ 250 V AC	Two Sets of Auxillary Contacts	0000000	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.

Push Button Style

Voltage	Breakthrough Current	Mounting Location	Ht.	Wd.	Blade Ht.	Temp. Range, °F	Specifications Met	Choose a Current, A		Each
72V DC	2,000 A @ 72 V DC	Fuse Block	2.06"	0.96"	0.25"	0° to 140°	UL Recognized, UL 1077, CSA Certified	1/4, 1/2, 1, 1 1/2, 2, 2 1/2, 3, 4, 5, 6, 8, 10	000000	000000

DIN-Rail Mount Holders

For DIN Rail Size, mm	Wire Connection Type		Each
35	Screw-Clamp Terminals	000000	000000

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