Skip to main content
Log in
Siemens 5SM9342-0KK — Residual Current Breakers (RCCB/RCBO)

Siemens 5SM9342-0KK SENTRON RC Unit, 4-Pole, 40 A, 30 mA, Ty

MPN5SM9342-0KK

Siemens SENTRON 5SM9342-0KK RC unit electronic, 4-pole, type AC, 40 A, 30 mA, 400 V AC, 50 Hz, instantaneous.

Siemens 5SM9342-0KK datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SM9342-0KK — Electrical Ratings
ParameterValue
Number of poles4
5SM9342-0KK — Identification
ParameterValue
Product designationRC unit electronic
Product design / constructionInstantaneous
5SM9342-0KK — Other specifications
ParameterValue
At AC40 A
Residual current typeAC
At 40 °C / rated value37.2 A
At 45 °C / rated value37.2 A
At 50 °C / rated value36 A
At 55 °C / rated value34.8 A
At 60 °C / rated value34 A
At 65 °C / rated value33.2 A
At 70 °C / rated value32 A
Tripping fault current30 mA
Value range (of the supply voltage, at AC)400 V
Value range (Of the supply voltage frequency)50 Hz

Product details

The Siemens SENTRON 5SM9342-0KK is a 4-pole residual current unit (RC unit) rated at 40 A with a 30 mA trip threshold, type AC, designed for instantaneous operation on 400 V AC, 50 Hz networks. It's a current-production component, so the supply chain is stable — no last-time-buy scramble.

The 40 A rating at 40 °C (37.2 A) and the full derating curve up to 70 °C (32 A) tell you this unit is designed for a warm panel — it doesn't lose half its capacity when the enclosure hits 50 °C. The 30 mA trip threshold covers personnel protection (hand-to-hand or hand-to-ground fault paths) per IEC 60364.

This part carries a current lifecycle stage, meaning Siemens has no active phase-out plan. For volume or blanket-order commitments, we can lock in a pricing window.

Frequently asked questions

What is the number of poles on this RC unit?

It is a 4-pole device, covering all three phases and neutral.

Where can I buy 5SM9342-0KK and how is it quoted?

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

Will 5SM9342-0KK drop into a panel specified around a 5SQ2670-2YA63 without rewiring?

No. The 5SM9342-0KK is a residual current unit, not a circuit breaker like the 5SQ2670-2YA63. They serve different protection functions and are not direct drop-in replacements.

MPN
5SM9342-0KK