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Compact grey DIN-rail miniature circuit breaker, two-pole, screw-clamp terminals

Schneider Electric

Schneider Electric M9F43208 8 A 2-pole D-curve miniature circuit breaker

SKU CH-GAYC-SZD4R

8 A D-curve miniature circuit breaker for DIN-rail branch protection, rated 14 kA AIR at 120/240 V AC with screw-clamp terminals for 18–8 AWG wire

  • Protects branch circuits with 8 A D-curve thermal magnetic trip
  • Withstands 14 kA fault current at 120/240 V AC
  • Mounts on DIN rail in 1.42 in width
  • Accepts 18 AWG to 8 AWG screw-clamp terminals
  • UL 489 listed for 240/277/480 V AC systems

8 A D-curve breaker for branch circuits

The Schneider Electric M9F43208 is a two-pole miniature circuit breaker rated at 8 A with a D-curve thermal-magnetic trip. It is designed for branch-circuit protection on DIN-rail mounted load centres and carries a 14 kA interrupting rating at 120/240 V AC. The device is UL 489 listed and accepts conductors from 18 AWG to 8 AWG via screw-clamp terminals.

Suited for high-inrush loads on 240–480 V systems

This breaker suits installers protecting circuits with high inrush currents such as motors, transformers or power supplies where a D-curve characteristic is required. It is not for DC applications because the unit has no DC voltage rating. Buyers needing single-pole protection or a different trip curve should select another model.

14 kA AIR at 120/240 V AC decides the fit

The 14 kA interrupting rating at 120/240 V AC is the key specification that determines whether this breaker meets the fault-current requirements of the panelboard. Verify the available short-circuit current at the installation point against this rating before specifying the device.

Highlights

  • Protects branch circuits with 8 A D-curve thermal magnetic trip
  • Withstands 14 kA fault current at 120/240 V AC
  • Mounts on DIN rail in 1.42 in width
  • Accepts 18 AWG to 8 AWG screw-clamp terminals
  • UL 489 listed for 240/277/480 V AC systems

Specifications

BrandSCHNEIDER ELECTRIC

Questions about this item

How does the 8 A rating affect branch-circuit protection in a real panel?

The breaker trips at 8 A using a thermal-magnetic D-curve, so it tolerates high inrush currents from motors or transformers while still disconnecting sustained overloads on a 120/240 V AC branch circuit.

What does the UL 489 listing and 14 kA AIR rating mean for the installation?

UL 489 certifies the device for branch-circuit protection, and the 14 kA interrupting rating at 120/240 V AC caps the maximum prospective fault current the breaker can safely clear.

What DIN-rail width and screw-clamp wire range does the 4.06 in long frame require?

The C60BP frame mounts on standard DIN rail and accepts 18 AWG to 8 AWG conductors in its screw-clamp terminals.

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