The Siemens 5SM1346-0FD is a Type AC FI-Protector (residual current device) rated 63A, 4-pole, with a 30mA trip sensitivity at 400V. It occupies 4TE on a DIN rail, 55mm wide — a standard panel-mount footprint for a 4P RCD in a distribution board or sub-distribution. Type AC detection means it trips on sinusoidal AC residual currents only — suitable for general-purpose circuits with resistive, inductive, or motor loads where pulsed DC fault currents are not expected. For circuits with VFDs, UPS, or switched-mode supplies, a Type A or Type B device would be required.
Siemens 5SM1346-0FD FI-Protector, 63A 4P 30mA AC Type, 400V
MPN5SM1346-0FD
Siemens 5SM1346-0FD FI-Protector, Type AC (WS), 63A, 4-pole, 30mA sensitivity, 400V, 4TE, 55mm width.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Product details
Frequently asked questions
What is 5SM1346-0FD used for?
It is a 63A, 4-pole Type AC residual current device (RCD) rated 400V, used for earth-fault protection in distribution boards, sub-distribution, and general-purpose circuits where sinusoidal AC residual currents are the expected fault type.
Where can I buy 5SM1346-0FD?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
MPN
5SM1346-0FD