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Siemens 5SY5240-7KK11 — 2-Pole MCB (DIN Rail)

Siemens 5SY5240-7KK11 SENTRON MCB, 2P C-curve 400V AC, 10kA

MPN5SY5240-7KK11

Siemens SENTRON 5SY5240-7KK11 miniature circuit breaker, 2-pole, C-curve, 400 V AC, 10 kA breaking capacity per EN 60898, 15 kA per IEC 60947-2, designed for railway applications.

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

Specifications

5SY5240-7KK11 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentuniversal current
5SY5240-7KK11 — Electrical
ParameterValue
Number of poles2
5SY5240-7KK11 — Protection
ParameterValue
Tripping characteristic classC
Overvoltage categoryIII
5SY5240-7KK11 — 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
5SY5240-7KK11 — Environmental
ParameterValue
Pollution degree3
5SY5240-7KK11 — 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

What it is and where it fits

The Siemens 5SY5240-7KK11 is a 2-pole miniature circuit breaker from the SENTRON family, with a C-curve tripping characteristic and a rated AC voltage of 400 V. It snaps onto a DIN rail via the quick assembly system and fits any mounting position, so it drops into standard distribution panels without extra hardware. The 36 mm width (2 modular units) and 76 mm depth leave room for adjacent breakers in a crowded enclosure.

Breaking capacity and duty

Rated breaking capacity is 10 kA per EN 60898 and 15 kA per IEC 60947-2 at DC. The C-curve (tripping between 5 and 10 times rated current) handles moderate inrush from motor starters or transformer banks without nuisance trips. Overvoltage category III and pollution degree 3 mean it's rated for fixed-installation panels, not just final circuits.

Frequently asked questions

Where can I buy 5SY5240-7KK11 and get a price?

This part is sourced and quoted to order against an RFQ through our independent distribution channel. Availability and current pricing are confirmed at quote time.

Will 5SY5240-7KK11 drop into a panel specified around 5SY4140-7 without rewiring?

Both are 2-pole SENTRON MCBs with the same 36 mm width and DIN-rail mount, so the physical swap is straightforward. However, verify the breaking capacity and curve match your coordination study — the 5SY5240-7KK11 carries a C-curve and 10 kA (EN 60898), while the 5SY4140-7 may differ. No rewiring of the busbar is needed if the terminal positions align.

What compliance documentation does Siemens provide for 5SY5240-7KK11?

The breaker carries approvals per its design: EN 60898 and IEC 60947-2 for breaking capacity, plus railway-specific vibration testing per IEC 60068-2-6. It is halogen-free and silicon-free. For specific RoHS/REACH/UL declarations, request the manufacturer's compliance documentation at quote time.

MPN
5SY5240-7KK11