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Siemens 3RT1026-1AD20 — Contactors

Siemens 3RT1026-1AD20 SIRIUS Power Contactor, S0, 11 kW at 4

MPN3RT1026-1AD20

Siemens SIRIUS 3RT1026-1AD20, S0 frame power contactor, 11 kW at 400 V AC-2, 15.5 A AC-4, screw terminals, 45 mm wide, current production.

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

3RT1026-1AD20 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-1AD20 — 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
3RT1026-1AD20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz42 V
3RT1026-1AD20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-1AD20 — 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
3RT1026-1AD20 — 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
3RT1026-1AD20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-1AD20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-1AD20 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth91 mm

Product details

For AC-4 duty (plugging, inching) at 400 V it carries 15.5 A — the rating that governs real-world jogging and reversing cycles. The 45 mm width and 85 mm height fit standard S0 panel cutouts; depth is 91 mm including the arc chamber.

Integration notes

Screw terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) solid conductors. For stranded wire, the range is 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm². AWG equivalents: 2x (16 to 12), 2x (14 to 10), or 1x 8. Type 1 coordination requires a 100 A gL/gG fuse upstream; type 2 coordination needs a 35 A gL/gG fuse.

Frequently asked questions

What are the key motor ratings for this contactor?

At 400 V AC-2 duty it delivers 11 kW for slip-ring motors. At 400 V AC-4 duty (plugging/reversing) it carries 15.5 A. At 500 V and 690 V it also delivers 11 kW.

What fuse coordination does this contactor require?

Type 1 coordination uses a 100 A gL/gG fuse; type 2 coordination uses a 35 A gL/gG fuse. This determines the upstream short-circuit protection for the motor branch.

What wire sizes fit the screw terminals?

Solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²). Stranded: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm². AWG: 2x (16 to 12), 2x (14 to 10), or 1x 8.

MPN
3RT1026-1AD20