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Siemens 3RT1026-1BW40 — Contactors

Siemens 3RT1026-1BW40 SIRIUS Power Contactor, Size S0, 48 VD

MPN3RT1026-1BW40

Siemens SIRIUS power contactor, Size S0, 48 V DC coil, screw-type terminals, 11 kW at 400 V AC-2/AC-3, 45 mm width, IP20 front.

$86.41Ref. 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

3RT1026-1BW40 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-1BW40 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V3 A
Rated value @ 500 V11 kW
Rated value @ 690 V11 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
3RT1026-1BW40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1026-1BW40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-1BW40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 100 A
Short-circuit coordination type 2, fusefuse gL/gG: 35 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1026-1BW40 — 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
3RT1026-1BW40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-1BW40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-1BW40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth101 mm

Product details

It carries a 48 V DC coil and is rated for 11 kW at 400 V in both AC-2 and AC-3 duty classes, meaning it handles slip-ring motors (AC-2) and standard squirrel-cage motors (AC-3) up to that power. For AC-4 duty — plugging and inching — the rated operational current is 15.5 A at 400 V.

Front protection is IP20, terminal area is IP00 — so the panel enclosure provides the environmental seal.

Coil and auxiliary circuit

Rated control supply voltage is 48 V DC. The contactor includes an instantaneous auxiliary contact (N/O). For the main circuit, screw-type terminals accept 2x (1 to 2.5 mm²) stranded or 2x (0.5 to 1.5 mm²) solid, with a maximum of 2x 10 mm².

Short-circuit coordination

For Type 2 coordination (contactor remains operational after a fault), the fuse is gL/gG 35 A. This is the spec the panel designer needs for the SCCR declaration.

Frequently asked questions

What is the closest functional second-source for 3RT1026-1BW40?

The 3RT1023-1AL20 is a Size S0 contactor with a similar AC-3 power rating but uses a 24 V AC/DC coil instead of the 48 V DC coil on this part. The 3RT1026-1AB00 shares the same 48 V DC coil but is a 4-pole configuration. Neither is a drop-in without verifying the coil voltage or pole count against your BOM.

Where can I buy 3RT1026-1BW40?

Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for your quantity and delivery window.

MPN
3RT1026-1BW40