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Siemens 3RT1017-2AN21 — Contactors

Siemens 3RT1017-2AN21 SIRIUS Contactor, Size S00, 5.5 kW at

MPN3RT1017-2AN21

Siemens SIRIUS power contactor, size S00, 3RT1017-2AN21, spring-loaded terminals, 5.5 kW at 400 V AC-2, 8.5 A AC-4, IP20, for 35 mm DIN rail.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RT1017-2AN21 — Identification
ParameterValue
Contactor frame sizeS00
3RT1017-2AN21 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V8.5 A
Rated value @ 400 V3 A
Rated value @ 500 V5.5 kW
Rated value @ 690 V5.5 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
3RT1017-2AN21 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz220 V
3RT1017-2AN21 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1017-2AN21 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 35 A
Short-circuit coordination type 2, fusefuse gL/gG: 20 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1017-2AN21 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, solid or stranded2x (0,25 ... 2,5 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
3RT1017-2AN21 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1017-2AN21 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Installation altitude, max.2 000 m
3RT1017-2AN21 — Mechanical
ParameterValue
Width45 mm
Height60 mm
Depth73 mm

Product details

Terminals and wiring — field-serviceable

Both main and auxiliary/control circuits use spring-loaded terminals. That means no screwdriver torque check, no vibration loosening — just strip, push, and go. The main contacts accept 2x (0.25 to 2.5 mm²) solid or stranded, or 2x (24 to 14 AWG). Auxiliary contacts take the same gauge range. If you're replacing a screw-terminal contactor, the spring cage is a nice upgrade for reliability in a high-vibration panel.

Ratings that matter for motor control

AC-4 at 8.5 A handles the high-stress inching and plugging duty where the contacts take the full locked-rotor current. The auxiliary contacts are rated for 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, and 6 A at 230 V — enough for most PLC or relay interface circuits.

Coordination and environment

Type 2 coordination (no welding after a short circuit) requires a 20 A gL/gG fuse; Type 1 (allow welding, but no fire risk) takes a 35 A fuse. That's a standard selection — your panel designer likely already has those on the BOM. Pollution degree 3 means it's suitable for conductive environments like a typical control room or light industrial floor.

Frequently asked questions

What is the closest functional alternative to the 3RT1017-2AN21?

The 3RT1017-1AP01 is a close sibling in the same SIRIUS S00 size. The key difference is the 1AP01 uses screw terminals on the main circuit, while the 2AN21 uses spring-loaded terminals. If your panel is wired for screw terminals, the 1AP01 drops in without re-terminating. The 2AN21's spring cage is a better fit if you want vibration-proof connections or faster wiring.

What is the depth of the 3RT1017-2AN21?

The depth is 73 mm. Width is 45 mm, height is 60 mm. That's the standard S00 footprint, so it fits the same DIN-rail space as other S00 contactors.

What wire sizes does the 3RT1017-2AN21 accept?

Main and auxiliary terminals accept 2x (0.25 to 2.5 mm²) solid or stranded, or 2x (24 to 14 AWG). Spring-loaded terminals — no screw torque needed.

Will the 3RT1017-2AN21 drop into a panel designed for the 3RT1017-1AP01?

Physically, yes — same S00 footprint, same DIN-rail mounting, same width/height/depth. The only difference is the wiring method: the 2AN21 uses spring-loaded terminals, while the 1AP01 uses screw terminals. If your panel is already wired with ferrules or solid wires stripped to the right length, the spring cage will accept them. If the existing wires are terminated with ring or fork terminals meant for screw clamps, you'll need to re-terminate or switch to the 1AP01.

MPN
3RT1017-2AN21