Skip to main content
Log in
Siemens 3RT1026-3BD40 — Contactors

Siemens 3RT1026-3BD40 SIRIUS Power Contactor, S0, 11 kW AC-2

MPN3RT1026-3BD40

Siemens SIRIUS 3RT1026-3BD40 power contactor, size S0, 11 kW AC-2 at 400 V, 15.5 A AC-4, screw-type main terminals, spring-loaded aux/control terminals, IP20 front, 45 mm width, snap-on 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

3RT1026-3BD40 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-3BD40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
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
3RT1026-3BD40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1026-3BD40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-3BD40 — 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
3RT1026-3BD40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1026-3BD40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-3BD40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Installation altitude, max.2 000 m
3RT1026-3BD40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth100 mm

Product details

The Siemens 3RT1026-3BD40 is a SIRIUS power contactor in frame size S0, rated for motor switching at 11 kW under AC-2 duty at 400 V and 15.5 A under AC-4 inching duty at 400 V.

The AC-2 11 kW at 400 V rating covers slip-ring motor starting where the contactor opens under load at reduced current — typical for crane or hoist applications. Type 2 coordination is met with a 35 A gL/gG fuse upstream, meaning the contactor remains usable after a short-circuit fault — no welded contacts, minimal downtime. For Type 1 coordination (replace after fault), a 100 A gL/gG fuse suffices.

Main power circuit uses screw-type terminals accepting 2x (0.25...2.5 mm²) solid or 2x (1...2.5 mm²) stranded, up to 2x 10 mm² max. Auxiliary and control circuits use spring-loaded terminals (2x 0.25...2.5 mm² solid, 2x 24...14 AWG) — no screw tightening needed on the aux side, which speeds panel wiring.

Frequently asked questions

What are the key motor ratings for this contactor?

It is rated 11 kW at AC-2 duty at 400 V (slip-ring motor starting) and 15.5 A at AC-4 duty at 400 V (inching/plugging).

What coordination fusing is required?

Type 2 coordination requires a 35 A gL/gG fuse; Type 1 coordination allows a 100 A gL/gG fuse upstream.

What is the mounting and terminal type?

It snap-mounts onto 35 mm DIN rail per EN 50022. Main terminals are screw-type; auxiliary and control terminals are spring-loaded.

MPN
3RT1026-3BD40