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Siemens 3RT1026-1AP04-1AA0 — Contactors

Siemens 3RT1026-1AP04-1AA0 SIRIUS S0 Power Contactor, 50 Hz

MPN3RT1026-1AP04-1AA0

Siemens SIRIUS S0 power contactor, 3RT1026-1AP04-1AA0, 50 Hz coil at 230 V, 3 NO main contacts, screw terminals, 45 mm width, 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

3RT1026-1AP04-1AA0 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-1AP04-1AA0 — 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
3RT1026-1AP04-1AA0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz230 V
3RT1026-1AP04-1AA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-1AP04-1AA0 — 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
3RT1026-1AP04-1AA0 — 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
3RT1026-1AP04-1AA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-1AP04-1AA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-1AP04-1AA0 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth140 mm

Product details

SIRIUS S0 power contactor for motor switching at 50 Hz

The Siemens 3RT1026-1AP04-1AA0 is a SIRIUS S0-frame power contactor with a 50 Hz coil rated at 230 V. For AC-2 at 400 V it handles 11 kW, covering slip-ring motor starting.

Wiring and terminal capacity

Main circuit terminals are screw-type, accepting 2x (1 to 2.5 mm²) stranded or 2x (2.5 to 6 mm²) solid, with a maximum of 2x 10 mm². The auxiliary/coil terminals take 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Strip length and ferrule sizing follow standard practice — 8 mm for the smaller terminals, 10 mm for the main power wires. For Type 2 coordination (limited weld risk), use a 35 A gL/gG fuse. That selectivity choice affects panel SCCR and should be locked in at the BOM stage.

Environmental limits and approvals

The coil operating range at 50 Hz is 0.8 to 1.1 times the rated voltage (230 V), so it picks up reliably down to about 184 V and holds in up to 253 V.

Frequently asked questions

What is the closest functional second-source for 3RT1026-1AP04-1AA0?

The 3RT1023-1AL20 is a smaller SIRIUS S0 contactor with a different coil voltage and lower AC-4 rating. It will not drop into the same panel without rewiring the coil circuit and verifying the motor load current fits the lower rating. The 3RT1016 variants are physically smaller S00 frames — different footprint, different terminal layout.

What is the depth of 3RT1026-1AP04-1AA0?

The depth is 140 mm. Combined with the 45 mm width and 85 mm height, it fits standard S0 panel cutouts and leaves room for wiring gutters in a DIN-rail enclosure.

What wire sizes does the 3RT1026-1AP04-1AA0 accept?

Main circuit screw terminals accept 2x (1 to 2.5 mm²) stranded or 2x (2.5 to 6 mm²) solid, max 2x 10 mm². Auxiliary/coil terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). AWG equivalents are 2x (16 to 12) and 2x (14 to 10) for main contacts, 1x 8 maximum.

Where can I buy 3RT1026-1AP04-1AA0?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment.

MPN
3RT1026-1AP04-1AA0