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Compact white DIN-rail circuit breaker, single pole, screw terminals, 3.54 by 0.71 inches

SIEMENS

SIEMENS 5SJ41307HG40 IEC Miniature Circuit Breaker 30A 1 Pole

SKU CH-EQTP-QS14Y

Single-pole IEC miniature circuit breaker rated 30 A with C-curve thermal-magnetic trip for 240 V AC branch protection

  • 30 A single-pole protection for branch circuits
  • C-curve thermal-magnetic trip handles inrush currents
  • 14 kA interrupting rating at 240 V AC
  • DIN-rail mount with screw-clamp terminals for 14–4 AWG wire
  • UL 489 listed for industrial and reverse-feed applications

IEC Miniature Circuit Breaker 30A

This single-pole circuit breaker from the SIEMENS 5SJ4 series provides branch-circuit protection for industrial applications. It uses a thermal-magnetic trip mechanism with a Curve Type C characteristic and mounts on standard DIN rail. The unit is rated for 30 A and accepts wire sizes from 14 AWG to 4 AWG via screw-clamp terminals.

Capacity and interrupting rating

The breaker carries a 30 A continuous current rating within a 63 A frame size and delivers a maximum AIR of 14 kA at 240 V AC. It is also rated for 60 V DC operation. The device meets UL 489 requirements and suits reverse-feed installations where line and load conductors may be interchanged.

Screw-clamp terminals and DIN rail mounting

Screw-clamp terminals secure conductors without specialised tooling, simplifying field wiring. The DIN rail mounting style allows quick snap-on installation alongside other modular devices in a panel. These features reduce assembly time and support reliable connections in industrial control cabinets.

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Price $50.99
Typical for this category: the median of 1,135 items is $54.99.

Specifications

Product
Brand nameSIEMENS

Questions about this item

Will the 30 A single-pole breaker coordinate with my existing 63 A frame DIN-rail devices?

Yes, it shares the 5SJ4 series 63 A frame so it mounts on the same DIN rail and matches the 14 kA interrupting rating at 240 V AC.

How do I verify the thermal-magnetic trip is functioning after wiring?

Apply rated current and confirm the breaker holds; a controlled overload should trip within the Curve C time-current band, and the toggle will move to the centre position.

Does the box include the DIN-rail clip and screw-clamp terminals for 14–4 AWG wire, or must I order them separately?

The DIN-rail mounting clip and screw-clamp terminals are built into the breaker body; no extra parts are required for 14 AWG to 4 AWG conductors.

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