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Siemens 3RT1026-1AK00 — Contactors

Siemens SIRIUS 3RT1026-1AK00 Power Contactor, 11 kW at 400 V

MPN3RT1026-1AK00

Siemens SIRIUS 3RT1026-1AK00 power contactor, size S0, 3-pole, 11 kW at 400 V AC-2, screw-type terminals, 45 mm width.

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

3RT1026-1AK00 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-1AK00 — 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
3RT1026-1AK00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz120 V
3RT1026-1AK00 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-1AK00 — 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
3RT1026-1AK00 — 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
3RT1026-1AK00 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-1AK00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-1AK00 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth91 mm

Product details

Rated for AC-2 duty at 11 kW on a 400 V supply, this contactor handles slip-ring motor starting and reversing. For AC-4 inching and plugging duty at 400 V, the operating current is 15.5 A.

Side-by-side mounting is permitted, so multiple contactors pack tightly on the rail without forced spacing — useful when building a motor control center bucket. Main circuit terminals accept solid or stranded conductors: 2x (1 to 2.5 mm²) or 2x (2.5 to 6 mm²), with a maximum of 2x 10 mm². For AWG, that's 2x (16 to 12) or 2x (14 to 10), max 1x 8 AWG.

Type 1 coordination (contactor may need replacement after a fault) allows a 100 A gL/gG fuse. The pollution degree is 3, meaning it's rated for the conductive environment inside a typical industrial enclosure.

Frequently asked questions

What are the key ratings for this contactor?

It is rated 11 kW at 400 V AC-2 for motor starting, 15.5 A at 400 V AC-4 for inching, and also 11 kW at both 500 V and 690 V. The coil is 24 VDC, drawing 10 A at that voltage.

What is the mounting and size?

It is a size S0 contactor, 45 mm wide, 85 mm high, 91 mm deep, and mounts via screw or snap-on onto a 35 mm DIN rail per EN 50022.

What coordination fusing is required?

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

MPN
3RT1026-1AK00