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Siemens 3RW4026-1TB04-ZW97 — Soft Starters

Siemens 3RW4026-1TB04-ZW97 SIRIUS Soft Starter, 25 A, 11 kW

Name: 3RW4026-1TB04-ZW97
Brand: Siemens
SKU: 3RW4026-1TB04-ZW97
Availability: LimitedAvailability
Author: Cost-Down Connie

MPN3RW4026-1TB04-ZW97

Siemens SIRIUS 3RW4026-1TB04-ZW97 soft starter, 25 A, 11 kW at 400 V, 200-480 V AC, 24 V AC/DC control, screw terminals, thermistor motor protection, multi-unit packaging of 5 units.

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Siemens 3RW4026-1TB04-ZW97 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RW4026-1TB04-ZW97 — Identification
Parameter	Value
Product designation	Soft starter
Product brand name	SIRIUS

3RW4026-1TB04-ZW97 — Power & Motor Rating
Parameter	Value
Rated insulation voltage	600V

3RW4026-1TB04-ZW97 — Protection & Features
Parameter	Value
Pollution degree	3, acc. to IEC 60947-4-2

3RW4026-1TB04-ZW97 — Other specifications
Parameter	Value
During storage acc. to IEC 60721	1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4
During operation acc. to IEC 60721	3K6 (no formation of ice, no condensation), 3C3 (no salt mist), 3S2 (sand must not get into the devices), 3M6
During transport acc. to IEC 60721	2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m)
Touch protection on the front acc. to IEC 60529	finger-safe, for vertical contact from the front
Protection class IP on the front acc. to IEC 60529	IP20

Product details

SIRIUS soft starter — 25 A, 11 kW, screw-terminal control

The 3RW4026-1TB04-ZW97: It accepts a three-phase supply from 200 to 480 V AC and uses a 24 V AC/DC control circuit with screw terminals. The integrated thermistor motor protection circuit monitors winding temperature directly — no external relay needed. Front touch protection meets IP20 per IEC 60529, finger-safe for vertical contact. Pollution degree 3 per IEC 60947-4-2 means it tolerates conductive dust in standard industrial enclosures without conformal coating.

Environmental and integration limits

Rated insulation voltage is 600 V — this sets the clearance and creepage design for the panel buswork. The storage, operation, and transport classes per IEC 60721 define the allowable envelope: occasional condensation during storage (class 1K6), no salt mist in operation (3C3), and a maximum fall height of 0.3 m during transport (2M2).