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Schneider Electric M9F44103 single-pole miniature circuit breaker, white DIN-rail housing, screw-clamp terminals

Schneider Electric

Schneider Electric M9F44103 IEC Miniature Circuit Breaker 3A 1P

SKU CH-F6B6-HCB4Z

IEC miniature circuit breaker rated 3 A, single-pole Z-curve with thermal-magnetic trip, 14 kA interrupting at 120/240 V AC, DIN-rail mount and screw-clamp terminals for 18–8 AWG wire

  • Protects branch circuits with 3 A thermal-magnetic trip
  • Interrupts up to 14 kA at 120/240 V AC
  • Fits DIN rail using screw-clamp terminals for 18–8 AWG wire
  • Rated 240/277/480 V AC and 60 V DC for versatile supplies
  • Compact 4.06 × 0.71 × 2.83 in frame suits tight panels

IEC Miniature Circuit Breaker 3 A

The Schneider Electric M9F44103 is a single-pole IEC miniature circuit breaker rated at 3 A for branch-circuit protection. It mounts on a DIN rail and uses a thermal-magnetic trip mechanism with a Z curve characteristic. Screw-clamp terminals accept conductors from 18 AWG to 8 AWG.

Installers fitting DIN-rail load centres

Electrical contractors wiring commercial or industrial panels will find the 14 kA interrupting rating at 120/240 V AC and the 60 V DC rating suitable for many control-circuit applications. Buyers who need ground-fault detection, multi-pole switching or higher current ratings should select a different device.

Z-curve thermal-magnetic trip

The Z-curve trip profile determines how quickly the breaker responds to overloads and short circuits, making it the critical specification for matching the protector to the connected load.

How it compares

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

Price $77.99
Cheaper than about 62% of the 25 comparable items (median $114.99).

Specifications

Product
Brand nameSCHNEIDER ELECTRIC

Questions about this item

Should I choose the 3 A, single-pole Z-curve version or a different rating for my branch circuit?

Select the 3 A, 1-pole Z-curve breaker when the protected circuit carries up to 3 A and requires Z-curve magnetic trip characteristics; choose another rating only if the load current or curve type differs.

What does the 14 kA interrupting rating mean once the breaker is installed in a panel?

It means the breaker can safely clear a short-circuit current of up to 14 kA at 120/240 V AC without damage, so the panel's available fault current must not exceed that value.

How does the DIN-rail mounting and screw-clamp terminal affect installation?

The breaker clips onto standard DIN rail and accepts 18 AWG to 8 AWG conductors secured by screw clamps, so no special tools beyond a screwdriver are required.

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