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Black DIN-rail thermal magnetic circuit breaker, single pole, 0.5 in wide

SQUARE D

SQUARE D 9080GCB40 Thermal Magnetic Circuit Breaker 4 A 250 V AC DIN 1 Pole

SKU CH-H7CS-FKVR6

DIN-rail thermal-magnetic breaker rated 4 A at 250 V AC with 16–10 AWG copper terminals

  • Thermal magnetic protection for reliable circuit interruption
  • 4 A rated current handles typical control circuit loads
  • Single pole DIN rail mount fits standard enclosures
  • 250 V AC maximum voltage suits industrial control panels
  • Wire range 16 AWG to 10 AWG copper accommodates common conductor sizes

Thermal Magnetic Circuit Protector

The Square D 9080GCB40 is a single-pole thermal magnetic circuit protector rated at 4 A and 250 V AC. It mounts on DIN rail and uses a track-mount connection with NEMA terminal blocks accepting copper conductors from 16 AWG to 10 AWG. The black housing measures 3.11 in long, 0.5 in wide and 3.15 in deep.

Installers needing supplementary protection

This device suits control circuits, industrial equipment and machinery where supplementary overcurrent protection is required and DIN rail mounting is standard. It is not suited for applications requiring branch-circuit protection or for multi-pole configurations. Buyers needing different current ratings, pole counts or mounting styles should look at other options.

4 A single-pole rating

The 4 A, single-pole rating at 250 V AC is the specification that determines whether this protector matches the circuit design. Verify the required current rating, voltage and pole count against the application before purchase.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $60.99
Typical for this category: the median of 1,135 items is $54.99.

Specifications

Product
Brand nameSQUARE D

Questions about this item

How much heat or noise does the 4 A thermal-magnetic breaker produce when running continuously on a DIN rail?

The device is a passive thermal-magnetic protector with no fan or moving parts, so it generates no audible noise and only minimal heat from normal 4 A current flow.

What wiring and rail must I already have to install this single-pole unit?

You need a standard DIN rail, copper conductors between 16 AWG and 10 AWG, and a 250 V AC supply — no additional accessories are required for track mounting.

Will this 1-pole, 250 V AC breaker coordinate with older DIN-mounted breakers rated to UL 1077 or CSA C22.2 No 235?

Yes, it carries the same UL 1077 and CSA C22.2 No 235 listings, so it can be used alongside legacy protectors that share those standards on the same DIN rail.

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