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Siemens 3RT1026-1BD40 — Contactors

Siemens 3RT1026-1BD40 SIRIUS Power Contactor, 11 kW at 400 V

MPN3RT1026-1BD40

Siemens SIRIUS power contactor, size S0, 3RT1026-1BD40, 11 kW at 400 V AC-2, 24 VDC coil, screw-type terminals, IP20 front, snap-on 35 mm DIN rail.

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

3RT1026-1BD40 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-1BD40 — 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
3RT1026-1BD40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1026-1BD40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-1BD40 — 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
3RT1026-1BD40 — 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
3RT1026-1BD40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-1BD40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-1BD40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth101 mm

Product details

Rated 11 kW at 400 V in AC-2 duty (slip-ring motors, reversing starts), it also carries 15.5 A in AC-4 (plugging, inching). The 24 VDC coil draws 5.4 W closing and holding — a single DC supply can keep it sealed without an economizer circuit. Auxiliary contacts switch up to 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V, covering pilot-duty and PLC interface needs.

Screw terminals on the main circuit accept 2x (1 to 2.5 mm²) stranded or 2x (2.5 to 6 mm²) solid, max 2x 10 mm² — enough for the 11 kW motor feed without a separate terminal block. Auxiliary terminals take 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²), max 2x 4 mm². IP20 on the front protects against finger contact; the terminals themselves are IP00, so the panel enclosure must provide the overall IP rating.

Protection and coordination

The 3RT1026-1BD40 also carries an AC-12 rating of 10 A for resistive loads.

Frequently asked questions

What is the 3RT1026-1BD40's depth?

The depth is 101 mm, with a width of 45 mm and height of 85 mm.

What wire sizes does the 3RT1026-1BD40 accept on the main terminals?

Main circuit screw terminals accept 2x (1 to 2.5 mm²) stranded, 2x (2.5 to 6 mm²) solid, or max 2x 10 mm².

Will the 3RT1026-1BD40 drop into a panel specified for the 3RT1023-1AL20 without rewiring?

Both are size S0 contactors on the same 45 mm DIN-rail footprint, so the mechanical fit is the same. However, the 3RT1023-1AL20 uses an AC coil (230 V, 50 Hz) while the 3RT1026-1BD40 uses a 24 VDC coil — the control wiring and power supply must match the coil voltage.

Where can I buy the 3RT1026-1BD40?

The 3RT1026-1BD40 is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

MPN
3RT1026-1BD40