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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.

Highlights

  • 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

Specifications

BrandSCHNEIDER 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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