Siemens SENTRON 5SJ4303-8HG42 miniature circuit breaker, 3-pole, D-characteristic, 3 A, DIN-rail mount.
Siemens 5SJ4303-8HG42 SENTRON MCB, 3-Pole D 3A
MPN5SJ4303-8HG42
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Siemens SENTRON 5SJ4303-8HG42 miniature circuit breaker, 3-pole, D-characteristic, 3 A, DIN-rail mount.
$137.16 – $349.84Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Brand name | SENTRON |
| Number of poles | 3 |
| Pole configuration | 3P |
| Suitability for operation | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic (curve) | D |
| Overvoltage category | 3 |
| IP protection class | IP20, with connected conductors, IP 40 in the handle range |
| Pollution degree | 3 |
| Parameter | Value |
|---|---|
| Rated current (AC) | 3 A |
| Neutral conductor switching | No |
| Parameter | Value |
|---|---|
| Modular width units | 3 |
| Mounting position | any |
| Width | 54 mm |
| Height | 121 mm |
| Depth | 70 mm |
| Installation depth | 70 mm |
| Terminal tightening torque, max. | 75 °C |
| Terminal tightening torque, min. | -40 °C |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| Fastening method | on standard mounting rail |
| Sealable | Yes |
| Parameter | Value |
|---|---|
| Halogen-free | Yes |
| Silicone-free | Yes |
Product details
Frequently asked questions
Will the 5SJ4303-8HG42 drop into a panel specified for the 5SJ4360-7HG41?
No — the 5SJ4360-7HG41 is a 60 A device (different current rating) and is not a functional second-source for a 3 A requirement.
What are the key mechanical dimensions of the 5SJ4303-8HG42?
Depth 70 mm, width 54 mm, height 121 mm.
MPN
5SJ4303-8HG42