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Siemens 3RT1026-1AD04-1AA0 — Contactors

Siemens 3RT1026-1AD04-1AA0 SIRIUS Power Contactor, S0, 3 NO,

MPN3RT1026-1AD04-1AA0

Siemens SIRIUS power contactor, S0 frame, 3 NO main contacts, screw terminals, 11 kW AC-2 at 400 V, 15.5 A AC-4, 24 VDC coil, DIN rail mount, IP20 front.

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

3RT1026-1AD04-1AA0 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-1AD04-1AA0 — 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
3RT1026-1AD04-1AA0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz42 V
3RT1026-1AD04-1AA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-1AD04-1AA0 — 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
3RT1026-1AD04-1AA0 — 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
3RT1026-1AD04-1AA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-1AD04-1AA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-1AD04-1AA0 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth140 mm

Product details

It is rated for 11 kW at 400 V in AC-2 duty (slip-ring motor starting) and 15.5 A in AC-4 duty (plugging/inching). The coil is 24 VDC. This is a current-production part, still in active manufacture.

Side-by-side mounting is permitted with no derating gap required.

Main circuit terminals are screw-type, accepting 2x (1–2.5 mm²) stranded or 2x (2.5–6 mm²) solid, up to 2x 10 mm² max. Auxiliary/solid terminals accept 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²). AWG equivalents: main 2x (16–12) or 2x (14–10), solid 1x 8. Strip lengths follow standard Siemens practice — 8–10 mm for screw clamps.

Short-circuit coordination

This matters when selecting branch protection for motor starter assemblies.

The integrated auxiliary contacts (2 instantaneous) are rated across common 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, 3 A at 400 V. These are the thermal current ratings — derate for inductive loads per the standard utilization categories.

Frequently asked questions

What are the key ratings for 3RT1026-1AD04-1AA0?

It is an S0 frame power contactor with 3 NO main contacts, rated 11 kW at 400 V AC-2, 15.5 A AC-4, with a 24 VDC coil. Mechanical life is 10 million operations typical.

Will 3RT1026-1AD04-1AA0 drop into a panel specified around 3RT1023-1AL20?

Both are S0 frame contactors on the same 45 mm DIN-rail footprint, so the physical swap is straightforward. However, verify your load ratings — the 3RT1026 is a higher-current variant (11 kW AC-2 vs the smaller 3RT1023). Rewiring is not needed if the existing conductors fit the terminal ranges listed.

Where can I buy 3RT1026-1AD04-1AA0?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
3RT1026-1AD04-1AA0