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Siemens 3RW4957-8VX30 — Soft Starters

Siemens 3RW4957-8VX30 SIRIUS Fan, 115 V AC

MPN3RW4957-8VX30

Siemens SIRIUS 3RW4957-8VX30 fan, 115 V AC, for mounting at output side of 3RW445 and 3RW446 soft starters.

Siemens 3RW4957-8VX30 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RW4957-8VX30 — Identification
ParameterValue
Product designationFan
Product brand nameSIRIUS
3RW4957-8VX30 — Other specifications
ParameterValue
Product categoryFan
Design of the productCan be used for 3RW445. and 3RW446. (for mounting at output side)/115 V AC
Substance prohibitance05/01/2012

Product details

What this fan fits and why it matters

The 3RW4957-8VX30 is a SIRIUS-branded fan designed specifically for the output side of Siemens 3RW445 and 3RW446 soft starters, running on 115 V AC. It is not a standalone cooling fan — it mounts as a forced-air accessory on those specific soft starter frames to keep the thyristor stack within its thermal budget during sustained starting duty.

Frequently asked questions

What soft starters does the 3RW4957-8VX30 fit?

It mounts at the output side of Siemens 3RW445 and 3RW446 soft starters, specifically the -BC3 variants, and runs on 115 V AC.

MPN
3RW4957-8VX30