The Siemens 5SU1653-6KV20 is a combined residual-current circuit breaker with integral overcurrent protection (RCBO) — a single module that replaces a separate RCD and MCB in a DIN-rail distribution board. The 1+N-pole construction switches and protects the line conductor only; the neutral is switched but not monitored for overcurrent. The 70 mm width (4 module spaces) is standard for a 1+N RCBO in the Siemens 5SU series, so it occupies four 17.5 mm DIN-rail positions in the enclosure.
Siemens 5SU1653-6KV20 FI/LS Protector Type A, 20A B-Curve 30
MPN5SU1653-6KV20
Siemens 5SU1653-6KV20 FI/LS protector, Type A (PSE/SSF), 70mm wide, 300mA residual, 4.5kA, 1+N-pole, B-curve 20A.
Source DocumentedChannel stated on listing & quote
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Product details
Frequently asked questions
What does the description FI/LS-PROTECTOR TYPE A (PSE/SSF) mean?
It is a residual-current circuit breaker with overcurrent protection (RCBO), Type A sensitivity (detects AC and pulsating DC fault currents), rated 300 mA residual current, 4.5 kA breaking capacity, 1+N-pole, B-curve 20 A, with a 70 mm width.
Where can I buy the 5SU1653-6KV20 and how is it quoted?
The 5SU1653-6KV20 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
MPN
5SU1653-6KV20