SIEMENS
SIEMENS 5SJ41307HG40 IEC Miniature Circuit Breaker 30A 1 Pole
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.
Highlights
- 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
Specifications
| Brand | SIEMENS |
|---|
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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