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Siemens 5SM3342-0LB — Residual Current Breakers (RCCB/RCBO)

Siemens 5SM3342-0LB SENTRON RCCB, 4P, 25A, 30mA, Type AC

MPN5SM3342-0LB

Siemens SENTRON 5SM3342-0LB, 4-pole RCCB, Type AC, 25 A rated, 30 mA trip, 400 V AC, 10 kA short-circuit current rating, DIN rail mount.

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

Specifications

5SM3342-0LB — Electrical Ratings
ParameterValue
Number of poles4
Overvoltage categoryIII
5SM3342-0LB — Identification
ParameterValue
Product designationRCCB
Product design / constructionInstantaneous
5SM3342-0LB — Mechanical
ParameterValue
Mounting positionany
Maximum25 mm²
Minimum1.5 mm²
Width72 mm
Height90 mm
Depth77 mm
Installation depth70 mm
5SM3342-0LB — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors

Product details

The 5SM3342-0LB: Mounts on a standard DIN rail (REG profile), occupies 4 width units (72 mm), and accepts conductors from 1.5 mm² up to 25 mm² — solid or stranded.

Supply can enter from top or bottom. The 30 mA trip sensitivity is the standard for personnel protection in most IEC 60364 installations — catches leakage through a person touching a live conductor to ground.

Silicon-free construction. Mechanical service life of 10 000 switching cycles — adequate for normal protection duty; not designed for frequent manual switching as a disconnect. The product carries the SENTRON brand designation and is classified per DIN EN 61346-2 and DIN EN 81346-2 as function F (protection).

Frequently asked questions

Where can I buy 5SM3342-0LB and get a price?

The 5SM3342-0LB is available through independent distribution channels. Submit an RFQ for current pricing and availability — confirmed at quote time, no stock numbers or price figures published here.

Will 5SM3342-0LB drop into a panel specified around 5SL6606-7YA without rewiring?

No — the 5SL6606-7YA is a miniature circuit breaker (MCB), not an RCCB. They serve different protection functions (overcurrent vs. earth leakage). The 5SM3342-0LB will not fit as a direct replacement in a slot designed for an MCB; the panel wiring and protection coordination must be redesigned.

What is the depth of 5SM3342-0LB?

77 mm overall depth, with a 70 mm installation depth behind the panel face. Fits standard 100 mm deep enclosures.

What is the width of 5SM3342-0LB?

72 mm, which corresponds to 4 width units (4 x 18 mm) on a standard DIN rail. Occupies the same panel space as a 4-pole MCB.

MPN
5SM3342-0LB