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Siemens 5SM1746-6 — Residual Current Breakers (RCCB/RCBO)

Siemens SENTRON 5SM1746-6 RCCB, 4-pole, 63 A, 500 mA, Type A

MPN5SM1746-6

Siemens SENTRON RCCB, 4-pole, Type A, 63 A rated at 40 °C, 500 mA trip, 10 kA SCCR, 50 Hz, DIN rail mount, IP20.

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

5SM1746-6 — Electrical Ratings
ParameterValue
Number of poles4
Overvoltage categoryIII
5SM1746-6 — Identification
ParameterValue
Product designationRCCB
Product design / constructionInstantaneous
5SM1746-6 — Mechanical
ParameterValue
Mounting positionany
Width in modular units4
Maximum45 °C
Minimum-25 °C
Installation depth55 mm
5SM1746-6 — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors
5SM1746-6 — Electrical
ParameterValue
Operational current / at AC / rated value63 A

Product details

The Siemens SENTRON 5SM1746-6 is a 4-pole residual current circuit breaker (RCCB) rated 63 A at 40 °C with a 500 mA tripping fault current, Type A sensitivity.

Ratings & Fit

Rated 63 A continuous at 40 °C ambient; derates to 60.48 A at 50 °C, 57.96 A at 55 °C, 55.44 A at 60 °C, 52.92 A at 65 °C, and 50.4 A at 70 °C — so in a warm panel the effective current capacity drops. The 500 mA trip threshold suits circuits with higher leakage (e.g., long cable runs or industrial loads) where a 30 mA device would nuisance-trip. Type A detects pulsating DC residual currents from rectifiers or VFDs, not just sinusoidal AC. The 4-pole design (3 phases + neutral) is standard for three-phase distribution boards.

Snap-on DIN rail (REG) mounting, any position. Installation depth 55 mm. Supply connection top or bottom. Silicon-free construction. Mechanical service life typical 10 000 switching cycles.

Frequently asked questions

What is 5SM1746-6's rated current and trip sensitivity?

Rated 63 A at 40 °C, tripping at 500 mA residual current, Type A.

What is the closest functional second-source for 5SM1746-6?

The 5SU9354-7KK16 is a 4-pole Type A RCCB with similar ratings, but verify the trip current and SCCR against your BOM — the 5SM1746-6 carries a 10 kA SCCR per IEC 61008-1.

Where can I buy 5SM1746-6 and how is it quoted?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.

What compliance documentation does this brand provide for 5SM1746-6?

As a Siemens SENTRON product, it carries IEC 61008-1 and EN 60898 compliance. Specific RoHS, REACH, and UL documentation is available on request with the order.

MPN
5SM1746-6