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White Schneider Electric DIN rail breaker, toggle actuator, compact single-pole form

Schneider Electric

Schneider Electric M9F44170 0.5 A Z-curve DIN rail breaker

SKU CH-4XJF-4Y7TD

Single-pole miniature circuit breaker with Z-curve thermal-magnetic trip for 0.5 A branch circuits at 240 V AC / 60 V DC, 14 kA interrupting, DIN-rail mount, screw-clamp terminals 18–8 AWG

  • Z-curve protects sensitive electronics with precise 0.5 A trip
  • 14 kA interrupting rating clears faults at 120/240 V AC
  • DIN-rail mount fits standard panels in 0.71 in width
  • Screw-clamp terminals accept 18 to 8 AWG conductors
  • UL 489 listed for branch-circuit protection up to 60 V DC

0.5 A Z-curve DIN rail breaker

The Schneider Electric M9F44170 is a single-pole miniature circuit breaker rated at 0.5 amps with a Z-curve thermal-magnetic trip. It mounts on a standard DIN rail and provides branch-circuit protection up to 240 V AC or 60 V DC with a 14 kA interrupting rating at 120/240 V AC.

Suited for low-current control circuits

This breaker suits panels protecting sensitive low-current loads such as instrumentation, PLC inputs or signaling wiring where a Z-curve avoids nuisance tripping on inrush. It is not for higher-current branch circuits, multi-pole applications or installations requiring a different trip characteristic.

Screw-clamp terminals accept 18 to 8 AWG

The integral screw-clamp terminals accommodate solid or stranded conductors from 18 AWG up to 8 AWG without separate lugs. The toggle actuator gives a clear on-off indication and the UL 489 listing confirms suitability for branch-circuit use in listed equipment.

Highlights

  • Z-curve protects sensitive electronics with precise 0.5 A trip
  • 14 kA interrupting rating clears faults at 120/240 V AC
  • DIN-rail mount fits standard panels in 0.71 in width
  • Screw-clamp terminals accept 18 to 8 AWG conductors
  • UL 489 listed for branch-circuit protection up to 60 V DC

Specifications

BrandSCHNEIDER ELECTRIC

Questions about this item

What DIN rail profile does the M9F44170 clip onto?

The breaker mounts on a standard DIN rail using its built-in toggle clip; no special rail type is mentioned in the specifications.

Can the 0.5 A Z-curve breaker share a DIN rail with older 60 V DC loads?

Yes, it is rated for 60 V DC and 240 V AC, so it can sit on the same rail as legacy DC circuits within those voltage limits.

How do I confirm the 14 kA interrupting rating is active after installation?

With power on, the toggle stays in the ON position under normal load; a trip moves it to the centre position, showing the thermal-magnetic mechanism operated correctly.

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