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Siemens 3RT1926-2FK31 — Contactors

Siemens 3RT1926-2FK31 SIRIUS Aux Switch, 3A

MPN3RT1926-2FK31
Active

Siemens SIRIUS 3RT1926-2FK31 auxiliary switch, clip-on mounting, 3 A maximum, adjustable time 5... 100 s.

$44.45Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT1926-2FK31 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz100 ... 127 V
3RT1926-2FK31 — Connection & Mounting
ParameterValue
Conductor cross-section, solid18 ... 14
Conductor cross-section, finely stranded w/ ferrule0.5 ... 2.5 m²
Mounting methodclip-on
3RT1926-2FK31 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-40 ... +85 °C
Installation altitude, max.2 000 m
3RT1926-2FK31 — Mechanical
ParameterValue
Width33 mm
Height46 mm
Depth73 mm

Product details

It's rated for a maximum 3 A and delivers 1 A for control-circuit loads. The adjustable time delay spans 5 to 100 s.

Clipped onto a SIRIUS contactor or base — no tools. Mounts in any position, which is a gift for tight panels where orientation is forced. Pollution degree 3, basic insulation. Wire: solid or stranded 18...14 AWG. Terminal accepts that range directly. Contact ratings are 1 A, 0.2 A, and 0.1 A. That's your load capacity curve — don't assume a flat 3 A across the board. Recovery time is 150 ms; minimum ON period 200 ms. If you're toggling faster than that, it won't pick up — not a general-purpose fast relay.

Frequently asked questions

What is the depth of the 3RT1926-2FK31?

The depth is 73 mm.

MPN
3RT1926-2FK31