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Siemens 5SM9335-6KK — Residual Current Breakers (RCCB/RCBO)

Siemens 5SM9335-6KK SENTRON RC Unit, 63 A, 30 mA, 3-Pole

MPN5SM9335-6KK

Siemens SENTRON 5SM9335-6KK RC unit electronic, 3-pole, Type A, In: 63 A, 30 mA, Un AC: 400 V, instantaneous design.

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

Specifications

5SM9335-6KK — Electrical Ratings
ParameterValue
Number of poles3
5SM9335-6KK — Identification
ParameterValue
Product designationRC unit electronic
Product design / constructionInstantaneous
5SM9335-6KK — Other specifications
ParameterValue
At AC63 A
Residual current typeA
At 40 °C / rated value58.6 A
At 45 °C / rated value58.59 A
At 50 °C / rated value56.7 A
At 55 °C / rated value54.81 A
At 60 °C / rated value53.55 A
At 65 °C / rated value52.29 A
At 70 °C / rated value50.4 A
Tripping fault current30 mA
Supply voltage frequency50 Hz

Product details

Type A detection covers sinusoidal AC residual currents plus pulsed DC (typical from rectifiers, VFDs, or switching power supplies), so this unit is suitable on circuits feeding single-phase electronics and small drives where a pure AC-sensitive device would miss the fault.

Thermal derating — where the 63 A rating lives

Above that, the unit derates linearly: 58.6 A at 40 °C, 56.7 A at 50 °C, 54.81 A at 55 °C, 53.55 A at 60 °C, 52.29 A at 65 °C, and 50.4 A at 70 °C. The 50 Hz frequency is fixed; this unit is not rated for 60 Hz operation.

Frequently asked questions

What is the 5SM9335-6KK used for?

It is a 3-pole residual current unit (RC unit electronic) rated 63 A, 30 mA, Type A, instantaneous, used for personal protection against ground faults in 400 V AC distribution boards.

Where can I buy the 5SM9335-6KK?

This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

How does the 5SM9335-6KK compare to the 5SL4363-7?

The 5SL4363-7 is a SENTRON miniature circuit breaker (MCB), 3-pole, 63 A, C-curve, 10 kA breaking capacity — it provides overcurrent and short-circuit protection only, not residual current detection. The 5SM9335-6KK is the complementary RC unit for ground-fault protection. They are not substitutes; in a panel they would typically be paired as a combined RCBO function (MCB + RCD) but are separate devices here.

MPN
5SM9335-6KK