Rated 400 V AC and 60 V DC, with an insulation voltage (Ui) of 440 V AC. Overvoltage category 3 and pollution degree 3 — standard for fixed industrial installations where transients are expected. The 2-pole design switches both line conductors; neutral is not switched. Protection class IP20 with connected conductors; IP40 in the handle range. Vibration resistance rated at 50 m/s² at 25 to 150 Hz and 60 m/s² at 35 Hz (4 s) — enough for machine-mounted panels near rotating equipment.
Siemens SENTRON 5SJ4205-8HG42 MCB, 2-Pole, D Curve, 10 kA
MPN5SJ4205-8HG42
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Siemens SENTRON 5SJ4 series, 5SJ4205-8HG42 miniature circuit breaker, 2-pole, D tripping characteristic, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 400 V AC, 60 V DC, 2 modular width units.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breakers |
| Brand name | SENTRON |
| Application environment | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Number of poles | 2 |
| Parameter | Value |
|---|---|
| Tripping characteristic class | D |
| Overvoltage category | 3 |
| Parameter | Value |
|---|---|
| Modular width units | 2 |
| Width | 36 mm |
| Height | 121 mm |
| Depth | 70 mm |
| Installation depth | 70 mm |
| Mounting position | any |
| Min. | -40 °C |
| Max. | 75 °C |
| Protection degree (IP) | IP20, with connected conductors, IP 40 in the handle range |
| Parameter | Value |
|---|---|
| Pollution degree | 3 |
| Parameter | Value |
|---|---|
| At AC rated value | 400 V |
| According to EN 60898 rated value | 10 kA |
Product details
Frequently asked questions
What is the breaking capacity of 5SJ4205-8HG42?
10 kA per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC.
What does the D tripping characteristic mean for this MCB?
The D curve means the magnetic trip operates at 10 to 20 times rated current, designed for high-inrush loads like motors and transformers.
Where can I buy 5SJ4205-8HG42 and get current pricing?
Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
MPN
5SJ4205-8HG42