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Siemens 3RT1026-1AB04-1AA0 — Contactors

Siemens 3RT1026-1AB04-1AA0 SIRIUS Power Contactor, S0, 24 VA

MPN3RT1026-1AB04-1AA0

Siemens SIRIUS power contactor, size S0, 3RT1026-1AB04-1AA0, 3 NO main contacts, 24 VAC 50 Hz coil, 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

3RT1026-1AB04-1AA0 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-1AB04-1AA0 — 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
3RT1026-1AB04-1AA0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz24 V
3RT1026-1AB04-1AA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-1AB04-1AA0 — 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
3RT1026-1AB04-1AA0 — 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
3RT1026-1AB04-1AA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-1AB04-1AA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-1AB04-1AA0 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth140 mm

Product details

Rated for AC-2 duty at 400 V, it handles 11 kW motor loads, and at AC-4 at 400 V it is rated for 15.5 A — the AC-4 figure governs reversing or inching applications where the contactor makes and breaks the motor at full load. For resistive loads under AC-12, the maximum operating current is 10 A. The coil pulls in at 24 VAC 50 Hz, with an operating range of 0.8 to 1.1 times the rated voltage — so it holds in down to about 19.2 V and picks up reliably at 26.4 V. That range matters when the control transformer is shared with other loads.

Front protection is IP20, meaning the contactor is finger-safe when installed in an enclosure. The terminals themselves are rated IP00, so the live parts are exposed until the panel door is closed — standard for panel-mount contactors. Wire sizes: solid conductors accept 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or up to 2x 4 mm². Stranded conductors take 2x 1–2.5 mm², 2x 2.5–6 mm², or up to 2x 10 mm². AWG equivalents for the main contacts are 2x 16–12, 2x 14–10, or 1x 8.

No broker or surplus channel is needed for this code.

Auxiliary contacts and protection

The contactor carries two instantaneous auxiliary contacts — one NO and one NC — rated for switching at various control voltages: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, and 3 A at 400 V. For short-circuit protection, coordination type 2 requires a gL/gG fuse rated at 35 A; type 1 coordination allows up to 100 A.

Frequently asked questions

What is the closest functional alternative to 3RT1026-1AB04-1AA0?

The 3RT1023-1AL20 is a similar SIRIUS S0 contactor, but it uses a 24 VDC coil instead of the 24 VAC 50 Hz coil on this part. If your control circuit is DC, that is a drop-in replacement on the same DIN rail footprint; if it is AC, you need the 3RT1026-1AB04-1AA0.

What is the depth of this contactor?

The depth is 140 mm, measured from the DIN rail mounting surface to the front of the contactor.

What wire sizes does the main circuit accept?

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

MPN
3RT1026-1AB04-1AA0