Skip to main content
Siemens 5SY7240-8CC — 2-Pole MCB (DIN Rail)

Siemens 5SY7240-8CC SENTRON MCB, 40 A D-Curve, 2-Pole, 400 V

MPN5SY7240-8CC

Siemens SENTRON 5SY7CC series, Miniature circuit breaker, 5SY7240-8CC, 2-pole, 40 A, D-curve, 400 V AC, 15 kA IEC 60947-2.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

5SY7240-8CC — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentMechanical engineering / industry
5SY7240-8CC — Electrical
ParameterValue
Number of poles2
5SY7240-8CC — Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY7240-8CC — Mechanical
ParameterValue
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Protection degree (IP)IP20, with connected conductors

Product details

40 A D-curve MCB for industrial feeder and motor circuits

Its 15 kA breaking capacity per IEC 60947-2 (at 400 V AC) handles substantial fault currents upstream in an industrial panel; the 5 kA rating per UL 1077 and CSA C22.2 No. 235 covers North American installations.

Terminal capacity accepts solid or stranded conductors from 0.75 mm² up to 35 mm², with a tightening torque range of 2.5 to 3.5 N·m; that covers most panel feed conductors up to a 4 AWG equivalent. Both top and bottom terminals are combined (line/load reversible), and the unit is sealable for tamper-proofing in metering or critical circuits.

Frequently asked questions

What is the breaking capacity of the 5SY7240-8CC?

The rated breaking capacity is 15 kA per IEC 60947-2 at 400 V AC, and 5 kA per UL 1077 and CSA C22.2 No. 235.

Will 5SY7240-8CC drop into a panel that was specified around 5SY7140-8CC without rewiring?

Yes — both are 2-pole, 40 A MCBs in the same SENTRON 5SY footprint (36 mm wide, 76 mm deep), with identical terminal capacity. The only change is the trip curve: D-curve on the 5SY7240-8CC versus C-curve on the 5SY7140-8CC. Mechanical fit and wiring are identical.

Where can I buy the 5SY7240-8CC?

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

MPN
5SY7240-8CC