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Siemens 5SJ4225-8HG42 — 2-Pole MCB (DIN Rail)

Siemens SENTRON 5SJ4225-8HG42 MCB, 2-Pole, D-Curve, 10/15 kA

MPN5SJ4225-8HG42
Active

Siemens SENTRON 5SJ4225-8HG42, 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, IP20.

$87.63Ref. price · indicative, final on quote
Siemens 5SJ4225-8HG42 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SJ4225-8HG42 — Identification
ParameterValue
Product designationMiniature circuit breakers
Brand nameSENTRON
Application environmentMechanical engineering / industry
5SJ4225-8HG42 — Electrical
ParameterValue
Number of poles2
5SJ4225-8HG42 — Protection
ParameterValue
Tripping characteristic classD
Overvoltage category3
5SJ4225-8HG42 — Mechanical
ParameterValue
Modular width units2
Width36 mm
Height121 mm
Depth70 mm
Installation depth70 mm
Mounting positionany
Min.-40 °C
Max.75 °C
Protection degree (IP)IP20, with connected conductors, IP 40 in the handle range
5SJ4225-8HG42 — Environmental
ParameterValue
Pollution degree3
5SJ4225-8HG42 — Specifications
ParameterValue
At AC rated value400 V
According to EN 60898 rated value10 kA

Product details

The Siemens SENTRON 5SJ4225-8HG42 is a 2-pole miniature circuit breaker with a D-tripping characteristic, designed for 400 V AC and 60 V DC circuits. It's rated 10 kA breaking capacity per EN 60898 and 15 kA per IEC 60947-2, meaning it can clear faults up to those levels without upstream coordination failure.

Frequently asked questions

What is the breaking capacity of 5SJ4225-8HG42?

10 kA per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC. The higher IEC figure applies when the MCB is used in an industrial distribution board.

What does the D-tripping characteristic mean for this MCB?

The D-curve trips at 10–20 times the rated current (In). That delays tripping during high inrush, making it suitable for motor, transformer, or welding loads.

Will 5SJ4225-8HG42 drop into a panel specified for 5SY7206-7CC?

Both are 2-pole MCBs on the same DIN-rail footprint (2 MW). The 5SJ4 series is the current SENTRON line; the 5SY7 is an older series. Check the terminal arrangement — the 5SJ4225-8HG42 uses combined top/bottom terminals (tunnel not available). If the panel wiring expects tunnel terminals, a different adapter or re-termination may be needed.

Where can I buy 5SJ4225-8HG42?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
5SJ4225-8HG42