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White IEC miniature circuit breaker, DIN rail mount, screw terminals, 1 pole 16A

SIEMENS

SIEMENS 5SJ41166HG40 IEC Miniature Circuit Breaker 16A 1 Pole

SKU CH-FXR5-3FGCQ

IEC miniature circuit breaker rated 16 A, single-pole, B-curve, 240 V AC with 14 kA interrupting capacity and DIN-rail screw-clamp terminals

  • 16 A single-pole protection for branch circuits
  • B-curve thermal-magnetic trip clears faults quickly
  • 14 kA breaking capacity at 240 V AC handles high fault currents
  • DIN-rail screw-clamp terminals accept 14–4 AWG wire
  • UL 489 listed for industrial and reverse-feed applications

IEC Miniature Circuit Breaker 16A

The SIEMENS 5SJ4 series breaker provides single-pole branch circuit protection for industrial and reverse-feed applications. Rated at 16A with a B curve, it trips thermally and magnetically to guard wiring against overloads and short circuits.

14kA interrupting at 240V AC

The device carries a maximum AIR rating of 14kA at 240V AC and is also rated for 60V DC. It meets UL 489 requirements, so the breaker can be applied where that standard is specified for the installation.

DIN rail mount with screw-clamp terminals

A DIN rail mounting style allows quick side-by-side assembly in standard enclosures. Screw-clamp terminals accept conductors from 14 AWG up to 4 AWG, giving installers a wide range of wire sizes for the same breaker frame.

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Price $59.99
Typical for this category: the median of 1,135 items is $54.99.

Specifications

Product
Brand nameSIEMENS

Questions about this item

Should I pick the 16 A single-pole version or a different current rating for my branch circuit?

Choose the 16 A model when the protected circuit is designed for 16 amps; the breaker carries 16 A continuously and trips on sustained overloads above that level.

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

It means the device can safely clear a short-circuit current of up to 14 kA at 240 V AC without damage, limiting let-through energy to downstream wiring.

The breaker is UL 489 listed — what does that standard cap in practice?

UL 489 certifies the breaker for branch-circuit protection in feeder and panelboard applications, confirming it meets the required interrupting and endurance tests for that role.

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