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Siemens 5SU1646-6FP20 — Residual Current Breakers (RCCB/RCBO)

Siemens 5SU1646-6FP20 SENTRON RCBO, 4P, 20A, Type B, 6kA

MPN5SU1646-6FP20
Active

Siemens SENTRON 5SU1646-6FP20 RCBO, 4-pole, 20 A rated at 30 °C, Type B tripping characteristic, 6 kA breaking capacity per EN 60898, 400 V AC, 50 Hz, 72 mm width (4 MW).

Siemens 5SU1646-6FP20 datasheet (PDF)
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

5SU1646-6FP20 — Electrical Ratings
ParameterValue
Number of poles4
Overvoltage categoryIII
5SU1646-6FP20 — Identification
ParameterValue
Product designationRCBO
Product design / constructionInstantaneous
5SU1646-6FP20 — Mechanical
ParameterValue
Mounting positionany
Width in modular units4
Maximum70 °C
Minimum-40 °C
Width72 mm
Height85 mm
Depth72 mm
Installation depth70 mm
5SU1646-6FP20 — Environmental
ParameterValue
IP degree of protectionIP20, if the distribution board is installed, with connected conductors
5SU1646-6FP20 — Electrical
ParameterValue
Tripping Characteristic ClassB

Product details

Siemens 5SU1646-6FP20 SENTRON RCBO — 4P, 20 A, Type B

It operates at 400 V AC, 50 Hz, and carries a 6 kA breaking capacity per EN 60898 and IEC 60947-2.

The 400 V AC rating across 4 poles means it can protect a three-phase plus neutral circuit, or be used in single-phase split configurations. The 50 Hz operating frequency is fixed — not suitable for 60 Hz systems without verifying the manufacturer's derating. Temperature derating is published: 20 A at 30 °C drops to 19.5 A at 40 °C, 18.9 A at 50 °C, and 17.8 A at 70 °C. If the distribution board is in a warm enclosure or adjacent to heat-generating equipment, use the 40 °C or 50 °C column for your continuous load calculation.

Frequently asked questions

What is the breaking capacity of 5SU1646-6FP20?

6 kA rated value per EN 60898 and IEC 60947-2, sufficient for most residential and light commercial final circuits.

Where can I buy 5SU1646-6FP20 and what is the lead time?

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

What is the difference between 5SU1646-6FP20 and 5SY4301-7CV?

The 5SY4301-7CV is a single-pole MCB (miniature circuit breaker) with Type C characteristic, while the 5SU1646-6FP20 is a 4-pole RCBO with Type B characteristic and integral residual current protection. They are not direct substitutes — the RCBO adds RCD functionality and occupies 4 MW instead of 1.

MPN
5SU1646-6FP20