Skip to main content
Log in
Siemens 3RT1026-3AF04 — Contactors

Siemens 3RT1026-3AF04 SIRIUS Power Contactor, S0, 11 kW at 4

MPN3RT1026-3AF04

Siemens SIRIUS 3RT1026-3AF04, size S0 power contactor, 3 NO main contacts, screw-type main terminals, spring-loaded auxiliary terminals, 11 kW at 400 V AC-2, 15.5 A at AC-4.

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

3RT1026-3AF04 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-3AF04 — 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
3RT1026-3AF04 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz110 V
3RT1026-3AF04 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-3AF04 — 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
3RT1026-3AF04 — 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
3RT1026-3AF04 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-3AF04 — Environmental
ParameterValue
Installation altitude, max.2 000 m
3RT1026-3AF04 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth140 mm

Product details

It carries three normally-open main contacts and 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).

Terminals and wiring

Main current circuit uses screw-type terminals accepting 2x (0.25...2.5 mm²) solid, 2x (1...2.5 mm²) or 2x (2.5...6 mm²) stranded, up to 2x 10 mm² max. The auxiliary and control circuit uses spring-loaded terminals (2x 0.25...2.5 mm² solid, 2x 24...14 AWG). The mixed terminal types mean you'll want screwdrivers for the power side and a push-in tool for the aux side — not a big deal on a new build, but worth noting if your panel shop standardizes on one termination method.

Frequently asked questions

What are the key ratings for this contactor?

It is rated 11 kW at 400 V AC-2 (slip-ring motor duty) and 15.5 A at AC-4 (plugging/inching). The main contacts are 3 NO. Ambient temperature range is -25 to +60 °C.

What is the mounting method and footprint?

It mounts via screw or snap-on onto 35 mm DIN rail per EN 50022. Dimensions are 45 mm wide, 85 mm tall, 140 mm deep. Side-by-side mounting is allowed.

What terminal types does it use?

Main circuit terminals are screw-type. Auxiliary and control circuit terminals are spring-loaded. Wire sizes range from 0.25 to 10 mm² depending on configuration.

What fuse coordination is required?

Type 2 coordination requires a gL/gG 35 A fuse upstream. Type 1 coordination allows a gL/gG 100 A fuse.

MPN
3RT1026-3AF04