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White single-pole DIN-rail circuit breaker with black toggle actuator

Eaton

Eaton FAZ-B10/1-SP Circuit Breaker 10A 1 Pole 277/480V AC 15kA

SKU CH-K5AK-AJG4S

A 10 A single-pole supplementary protector rated 277/480 V AC with a 15 kA interrupting capacity and thermal-magnetic trip

  • 10 A rated current protects circuits up to 277/480 V AC
  • 15 kA interrupting capacity at 240/415 V AC handles high fault currents
  • Thermal-magnetic trip mechanism provides reliable overload and short-circuit protection
  • Single-pole DIN-rail design simplifies panel installation
  • UL 1077 recognised supplementary protector meets recognised safety standards

Eaton FAZ-B10/1-SP Supplementary Protector

This Eaton FAZ-B10/1-SP is a single-pole supplementary protector rated at 10 A and 277/480 V AC. It mounts on a standard DIN rail and uses a thermal-magnetic trip mechanism with a B-curve characteristic. The device is UL 1077 recognised and intended for equipment-level circuit protection in industrial control panels.

Sustained-load behaviour and interrupting capacity

Under continuous operation the thermal element responds to prolonged overcurrents while the magnetic element reacts to short-circuit faults. The unit carries a maximum AIR of 15 kA at 240/415 V AC, providing reliable interruption during sustained fault conditions. A 48 V DC rating extends its use to low-voltage DC control circuits.

Installation checks before ordering

Verify that the panel uses DIN-rail mounting and that the available fault current does not exceed 15 kA at the applied voltage. Confirm the system voltage matches the 277/480 V AC or 48 V DC ratings and that a single-pole B-curve device suits the load profile. Lug terminals accept standard wire connections for the rated current.

How it compares

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Price $42.99
Cheaper than about 61% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON

Questions about this item

How much heat or noise does the 10 A breaker produce during continuous operation?

The thermal-magnetic trip mechanism operates silently and generates only normal warm-up at the 10 A rated current; no fan or active cooling is involved.

What existing panel equipment is required to install this single-pole FAZ unit?

A DIN-rail mounting slot and wiring suitable for lug terminals at 277/480 V AC are needed; the breaker fits standard DIN rail profiles.

Will the 15 kA interrupting rating coordinate with older 240/415 V AC switchgear?

The 15 kA AIR rating at 240/415 V AC matches many legacy panels, and the B-curve trip characteristic provides familiar coordination with existing downstream devices.

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