Skip to main content
Siemens 3RT1026-3AL20-1AA0 — Contactors

Siemens 3RT1026-3AL20-1AA0 SIRIUS Power Contactor, S0, 15.5

MPN3RT1026-3AL20-1AA0

Siemens SIRIUS, power contactor, size S0, 3RT1026-3AL20-1AA0, screw-type main terminals and spring-loaded auxiliary/control terminals, 45 mm width, 85 mm height, 91 mm depth, IP20 front / IP00 terminals.

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

3RT1026-3AL20-1AA0 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-3AL20-1AA0 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
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
3RT1026-3AL20-1AA0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz230 V
3RT1026-3AL20-1AA0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-3AL20-1AA0 — 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
3RT1026-3AL20-1AA0 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1026-3AL20-1AA0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-3AL20-1AA0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Installation altitude, max.2 000 m
3RT1026-3AL20-1AA0 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth91 mm

Product details

Main power terminals are screw-type; the auxiliary and control circuit uses spring-loaded terminals, so no tool is needed for the control wiring side.

The AC-4 figure is the one that governs real motor life on reversing or jogging applications; if your circuit cycles through stall current, size against the 15.5 A AC-4 row, not a higher AC-3 number. Auxiliary contact ratings cover the full control-voltage spread: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V. The 690 V main circuit rating supports 11 kW output — common for 690 V delta-connected motors in European or mining installations.

Coordination and protection requirements

These are the fusing limits for the main circuit; the auxiliary circuit has its own AWG limits (2x 24–14).

Current production stage.

Side-by-side mounting is permitted — no derating required for adjacent units. The front face carries IP20 (finger-safe), while the terminals are rated IP00 (no protection against tool or wire contact), so panel builders should cover exposed terminals with a shrouding or keep clearance in the enclosure.

Frequently asked questions

Does 3RT1026-3AL20-1AA0 drop into a panel wired for 3RT1017-1AP01?

Both are SIRIUS S0 frame contactors on 45 mm width, so the DIN-rail footprint and panel cutout are identical. Main power terminal wiring (screw-type on both) and auxiliary terminal wiring (spring-loaded on both) use the same wire ranges. No rewiring of the panel layout is needed — the swap is mechanical and electrical drop-in.

MPN
3RT1026-3AL20-1AA0