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Siemens 3RT1015-1WB42 — Contactors

Siemens SIRIUS 3RT1015-1WB42 Power Contactor, S00, 24 VDC Co

MPN3RT1015-1WB42

Siemens SIRIUS 3RT1015-1WB42 power contactor, size S00, 24 V DC coil with integrated varistor, screw terminals, 10 A AC-12 rated operational current, 3 kW at AC-2 400 V.

$241.74Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT1015-1WB42 — Identification
ParameterValue
Contactor frame sizeS00
3RT1015-1WB42 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V6.5 A
Rated value @ 400 V3 A
Rated value @ 500 V3.5 kW
Rated value @ 690 V4 kW
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1015-1WB42 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1015-1WB42 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1015-1WB42 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 35 A
Short-circuit coordination type 2, fusefuse gL/gG: 20 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1015-1WB42 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Side-by-side mountingYes
3RT1015-1WB42 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
3RT1015-1WB42 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1015-1WB42 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth72 mm

Product details

Auxiliary contact ratings are specified across voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC. These values govern the switching capacity for control circuits, pilot lights, or PLC inputs connected through the auxiliary contacts. Short-circuit protection coordination is defined: Type 2 coordination requires a gL/gG fuse rated 20 A, while Type 1 coordination allows a 35 A fuse. This lets the panel designer select the upstream protection based on whether they need the contactor to remain serviceable after a fault (Type 2) or are willing to replace it (Type 1).

The contactor measures 57.5 mm high and 72 mm deep, fitting within the S00 envelope. Terminals are IP20 finger-safe on the front and at the connection points. Screw terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or up to 2x (0.75 to 4 mm²) per clamp. AWG equivalents are 2x (20 to 16), 2x (18 to 14), or 1x 12.

Frequently asked questions

What is the closest functional alternative to 3RT1015-1WB42?

The 3RT1015-1BB42 is the same S00 frame size and contactor family but with a 24 V AC coil instead of DC. The mechanical footprint and terminal layout are identical, so it drops into the same panel without rewiring the power circuit — only the coil supply needs to change from DC to AC.

What are the key ratings for motor switching?

At AC-2 duty on 400 V, the contactor is rated for 3 kW. At AC-4 duty on 400 V, the rated operational current is 6.5 A. These cover slip-ring motor starting and reversing/inching applications respectively.

What surge suppression is built into this contactor?

The coil includes an integrated varistor as the surge suppressor, eliminating the need for an external RC snubber or diode module across the 24 V DC coil.

MPN
3RT1015-1WB42