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Siemens 5SY7340-8CC — Miniature Circuit Breakers (MCB)

Siemens 5SY7340-8CC SENTRON MCB, 3P D-curve 40A 400V 15kA

MPN5SY7340-8CC

Siemens SENTRON 5SY7340-8CC miniature circuit breaker, 3-pole D-curve, 40 A rated at 400 V AC, 15 kA breaking capacity per IEC 60947-2, 5 kA per UL 1077/CSA 22.2.

Siemens 5SY7340-8CC datasheet (PDF)
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

5SY7340-8CC — Ratings
ParameterValue
Overvoltage categoryIII
5SY7340-8CC — Mechanical
ParameterValue
Width54 mm
Height90 mm
Depth76 mm

Product details

The 5SY7340-8CC is a Siemens SENTRON miniature circuit breaker, 3-pole, D tripping characteristic, rated 40 A at 400 V AC. At 400 V AC the unit interrupts fault currents up to 15 kA (IEC 60947-2), which covers most industrial panel SCCR requirements; for North American installations the UL 1077 / CSA 22.2 No. 235 rating is 5 kA at the same voltage. The D-curve's wider magnetic trip band (10–20× In) avoids nuisance tripping on motor start, transformer energization, or capacitor bank switching. For DC circuits the maximum rated voltage is 72 V, so this is an AC-primary breaker.

Occupies 3 width units (54 mm) on the rail. Mounting position any orientation. Touch protection built in.

Frequently asked questions

What is the breaking capacity of 5SY7340-8CC?

15 kA at 400 V AC per IEC 60947-2. For UL 1077 / CSA C22.2 No. 235 applications the rating is 5 kA.

Will 5SY7340-8CC drop into a panel that was specified around 5SY6613-8?

Both are 3-pole SENTRON MCBs on the same DIN-rail footprint, but the 5SY6613-8 is a B-curve 13 A unit while this is a D-curve 40 A — different trip characteristics and current ratings. The mechanical fit is the same; the electrical substitution depends on whether the circuit requires D-curve inrush tolerance and 40 A continuous capacity.

What compliance documentation does Siemens provide for 5SY7340-8CC?

The breaker carries IEC 60947-2 and UL 1077 / CSA C22.2 No. 235 certifications. It is halogen-free and silicon-free. Standard RoHS and REACH declarations are available from Siemens documentation.

Where can I buy 5SY7340-8CC and how is it quoted?

Sourced to order through independent distribution channels. Submit an RFQ for current pricing and lead time — volume discounts apply on larger quantities.

MPN
5SY7340-8CC