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Siemens 3RT1026-3AC20 — Contactors

Siemens 3RT1026-3AC20 SIRIUS Power Contactor, 11 kW @ 400V A

MPN3RT1026-3AC20

Siemens SIRIUS, power contactor, 3RT1026-3AC20, size S0, 11 kW at 400 V AC-3, 24 VDC coil, screw-type terminals, 45 mm width, DIN EN 50022 rail mount.

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

3RT1026-3AC20 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-3AC20 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V11 kW
Rated value @ 500 V11 kW
Rated value @ 690 V11 kW
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1026-3AC20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz24 V
3RT1026-3AC20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-3AC20 — 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
3RT1026-3AC20 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Side-by-side mountingYes
3RT1026-3AC20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-3AC20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Installation altitude, max.2 000 m
3RT1026-3AC20 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth90 mm

Product details

Contactor selection brief

The Siemens 3RT1026-3AC20 is a SIRIUS power contactor in the S0 frame size, rated for 11 kW at 400 V AC-3. The 24 VDC coil keeps it in the common PLC-level control voltage range, so no separate transformer or AC bridge is needed.

For type 2 coordination (no-weld-on-fault), the required upstream fuse is 35 A gL/gG; for type 1 coordination, 100 A gL/gG.

The 45 mm width occupies one standard 45 mm module slot on the rail. Main circuit terminals are screw-type, accepting 2x (1 to 2.5 mm²) solid or stranded, 2x (2.5 to 6 mm²), or max 2x 10 mm². Auxiliary wiring accepts 2x (0.25 to 2.5 mm²) solid. Side-by-side mounting is permitted with zero spacing, and the side clearance required is 6 mm — typical for S0 contactors in a dense rail layout.

Frequently asked questions

What is the depth of the 3RT1026-3AC20?

The depth is 90 mm, with a width of 45 mm and height of 85 mm. This fits a standard 45 mm DIN-rail slot.

What wire sizes does the 3RT1026-3AC20 accept?

Main circuit screw terminals accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm² stranded/solid. Auxiliary terminals accept 2x (0.25 to 2.5 mm²) solid. AWG equivalents: main 2x (16 to 12), 2x (14 to 10), 1x 8.

Will 3RT1026-3AC20 drop into a panel specified around 3RT1034-1AN60-1AA0?

No — the 3RT1034-1AN60-1AA0 is a larger frame size with a different footprint and higher current rating. The 3RT1026-3AC20 (S0, 45 mm wide) is physically smaller and electrically lower-rated. Rewiring and possibly a different DIN-rail layout would be required.

What compliance documentation is available for 3RT1026-3AC20?

The contactor carries a reference code per DIN EN 81346-2 and is designed for pollution degree 3 per IEC 60947-1. Standard Siemens SIRIUS documentation includes CE declaration of conformity and UL/CSA recognition for the series. Specific certificates (RoHS, REACH, UL) are available on request via the RFQ process.

MPN
3RT1026-3AC20