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Siemens 5SY5240-7 — 2-Pole MCB (DIN Rail)

Siemens 5SY5240-7 SENTRON MCB, 2P C-Curve, 10 kA, 400 V AC

MPN5SY5240-7
Active

Siemens SENTRON 5SY5240-7, 2-pole miniature circuit breaker, C-curve, 10 kA interrupting rating per IEC/EN 60898-2, 400 V AC / 440 V DC, 2 MW, IP20.

Siemens 5SY5240-7 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY5240-7 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentuniversal current
5SY5240-7 — Electrical
ParameterValue
Number of poles2
5SY5240-7 — Protection
ParameterValue
Tripping characteristic classC
Overvoltage categoryIII
5SY5240-7 — 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
5SY5240-7 — Environmental
ParameterValue
Pollution degree3
5SY5240-7 — 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

Siemens 5SY5240-7 SENTRON — 2-Pole C-Curve MCB for Universal-Current Panels

It also carries a UL1077 listing, making it suitable for supplementary protection in North American panels. This is a current-production part — no lifecycle concerns for new builds or spares.

The 10 kA breaking capacity at 400 V AC is the maximum fault current it can safely interrupt; for DC circuits, the same 10 kA applies per EN 60898-2, while the IEC 60947-2 rating pushes to 15 kA for industrial distribution boards. Rated for 400 V AC and 440 V DC with a maximum DC operating voltage of 500 V, it covers both single-phase and multi-phase AC supplies as well as DC bus protection. The 50/60 Hz rating confirms line-frequency compatibility.

Deployment Context — Panel Integration

The 2 MW width — 36 mm — occupies two 18 mm slots; plan your rail fill accordingly. The sealable option allows locking the handle in OFF position for lockout/tagout procedures.

Frequently asked questions

What are the key ratings of 5SY5240-7?

2-pole, C-curve trip characteristic, 10 kA breaking capacity per IEC/EN 60898-2, rated 400 V AC / 440 V DC, 2 MW width (36 mm), 76 mm depth.

Where can I buy 5SY5240-7 and how do I get a price?

This part is sourced to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time.

What compliance standards does 5SY5240-7 meet?

It complies with IEC/EN 60898-2 and UL1077. The design is halogen-free and silicon-free. Pollution degree 3 and overvoltage category III are rated.

MPN
5SY5240-7