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Siemens 5SJ6340-7 — 3-Pole MCB (DIN Rail)

Siemens SENTRON 5SJ6340-7 MCB, 3-Pole, C-Curve, 40A, 6kA

MPN5SJ6340-7

Siemens SENTRON 5SJ6 series, miniature circuit breaker, 3-pole, C-curve, 40 A, 400 V AC, 6 kA breaking capacity, IP20, 70 mm depth.

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

Specifications

5SJ6340-7 — Identification
ParameterValue
Design / model code5SJ6
Brand nameSENTRON
Number of poles3
5SJ6340-7 — Protection
ParameterValue
Tripping characteristic (curve)C
Breaking capacity per EN 608986 kA
Breaking capacity per IEC 60947-26 kA
Overvoltage category3
IP protection classIP20, with connected conductors
5SJ6340-7 — Electrical
ParameterValue
Rated frequency50 Hz
5SJ6340-7 — Mechanical
ParameterValue
Mounting positionany
Installation depth70 mm
SealableYes
5SJ6340-7 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of surrounding temperaturePeriodically +55°C, max. 95% humidity

Product details

The Siemens SENTRON 5SJ6340-7 is a 3-pole miniature circuit breaker from the 5SJ6 series, rated 40 A at 400 V AC with a C tripping characteristic and a 6 kA breaking capacity per both EN 60898 and IEC 60947-2.

Occupies 3 width units (roughly 54 mm) on a standard DIN rail. Terminals accept solid or stranded conductors from 0.75 mm² up to 25 mm² — covers everything from 2.5 mm² branch circuits up to 10 mm² feeders. Mounting position is unrestricted; the breaker can be installed upside-down or sideways without derating.

Overvoltage category 3, energy limiting class 3. Vibration resistance tested to 50 m/s² at 25–150 Hz and 60 m/s² at 10–150 Hz per IEC 60068-2-6. Halogen-free and silicon-free construction, sealable for tamper-evident installations. Mechanical service life rated at 20 000 switching cycles typical.

Frequently asked questions

How do I get current pricing and availability for 5SJ6340-7?

Submit an RFQ through this listing. The part is sourced and quoted to order; availability and current pricing are confirmed at quote time through independent distribution channels.

Will 5SJ6340-7 drop into a panel specified around 5SJ6463-7 without rewiring?

No — the 5SJ6463-7 is a 4-pole, 63 A breaker occupying 4 width units. The 5SJ6340-7 is 3-pole, 40 A, 3 width units. Same 70 mm depth and terminal wire range (0.75–25 mm²), but the pole count and current rating differ. Panel would need re-wiring and a different busbar arrangement.

What compliance documentation does this brand provide for 5SJ6340-7?

Siemens SENTRON breakers carry CE marking per low-voltage directive, and the 5SJ6 series is designed to EN 60898 and IEC 60947-2. The halogen-free and silicon-free construction supports RoHS compliance. Specific declarations (RoHS, REACH, UL) are available from Siemens documentation portal or upon request with an RFQ.

MPN
5SJ6340-7