Skip to main content
Siemens 5SY5250-6 — 2-Pole MCB (DIN Rail)

Siemens 5SY5250-6 SENTRON MCB, 2-Pole B-Char, 10kA

MPN5SY5250-6
Active

Siemens SENTRON 5SY5250-6, miniature circuit breaker, 2-pole, B characteristic, 10 kA breaking capacity, 400 V AC / 440 V DC, 2 MW units.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY5250-6 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentuniversal current
5SY5250-6 — Electrical
ParameterValue
Number of poles2
5SY5250-6 — Protection
ParameterValue
Tripping characteristic classB
Overvoltage categoryIII
5SY5250-6 — Mechanical
ParameterValue
Modular width units2
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Min.-40 °C
Max.75 °C
Protection degree (IP)IP20, with connected conductors
5SY5250-6 — Environmental
ParameterValue
Pollution degree3
5SY5250-6 — Specifications
ParameterValue
At AC rated value400 V
According to EN 60898 rated value10 kA
With single-phase operation at AC rated value440 V
Energy Limitation Class3

Product details

It carries a B tripping characteristic — the standard choice for general lighting and socket-outlet circuits where inrush is moderate — and is certified to both IEC / EN 60898-2 and UL1077, so it fits European and North American panel specs alike. The 2-pole design switches both phase and neutral? No — neutral is not switched, so this is a two-pole breaker protecting two line conductors, not a 1P+N. That matters when you're ordering for a split-phase or dual-line feed.

Installation depth (behind the panel) is 70 mm. Mounts in any position via the quick-assembly system — snaps onto standard DIN rail. Overvoltage category III suits fixed-installation distribution boards. Sealable for lockout/tagout compliance. Halogen-free and silicon-free, which matters in clean-room or sensitive electronics environments where outgassing can cause contact corrosion.

Electrical ratings and operating limits

Rated voltage: 400 V AC (single- or multi-phase) and 440 V DC. Maximum DC operating voltage goes to 500 V. Frequency 50/60 Hz. Humidity influence: max 95% at 55 °C, derating to 35% at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. This holds up in machine-mounted enclosures near rotating equipment.

Current-production part.

Frequently asked questions

What compliance documentation does this brand provide for 5SY5250-6 (RoHS, REACH, UL, IEC)?

Certified to IEC / EN 60898-2 and UL1077. Halogen-free and silicon-free. RoHS/REACH compliance is standard for SENTRON MCBs; specific declarations available on request.

MPN
5SY5250-6