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Siemens 3RT7035-1AH20 — Contactors

Siemens 3RT7035-1AH20 SIRIUS Contactor, S2, 3-pole, 690 V AC

MPN3RT7035-1AH20

Siemens SIRIUS S2 contactor, 3RT7035-1AH20, 3-pole, AC-3 rated 690 V, AC coil, screw terminals, IP20 front, 115 x 55 x 112 mm.

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

Specifications

3RT7035-1AH20 — Identification
ParameterValue
Contactor frame sizeS2
3RT7035-1AH20 — Ratings & Performance
ParameterValue
Rated value @ 400 V3 A
Rated value @ 690 V1 A
Rated value @ 230 V6 A
3RT7035-1AH20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.42
Rated value @ 50 Hz42 V
3RT7035-1AH20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliabilityacceptability for PLC control (17 V, 5 mA)
3RT7035-1AH20 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegL/gG NH 3NA: 125 A
Short-circuit coordination type 2, fusegL/gG NH 3NA: 80 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT7035-1AH20 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT7035-1AH20 — Environmental
ParameterValue
Operating temperature range-10 ... +55 °C
Storage temperature range-25 ... +70 °C
Installation altitude, max.2 000 m
3RT7035-1AH20 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth115 mm

Product details

The Siemens 3RT7035-1AH20 is a size S2 contactor from the SIRIUS series, with 3 normally-open main contacts rated for AC-3 duty up to 690 V. The AC coil draws 0.42 A at both 50 Hz and 60 Hz, with a closing power of 0.73 W DC and holding power of 0.41 W DC. Screw-type terminals on both the main and auxiliary circuits simplify panel wiring. The contactor snaps onto a 35 mm DIN rail per EN 50022 or can be screw-mounted, with ±180° rotation possible on a vertical surface and ±22.5° tilt forward or backward.

For Type 2 coordination, the required upstream fuse is an 80 A gL/gG NH 3NA; for Type 1 coordination, a 125 A gL/gG NH 3NA. The contactor's auxiliary switch capability (product extension available) and contact reliability down to 17 V, 5 mA make it acceptable for direct PLC control without an interposing relay.

Operating temperature range is -10 to +55 °C; storage from -25 to +70 °C. The contactor accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire, or finely stranded with ferrule. Shock resistance is 15g at 5 ms and 8g at 10 ms sine pulse.

Frequently asked questions

What are the key ratings of the 3RT7035-1AH20?

It is a 3-pole contactor rated for AC-3 duty up to 690 V, with an AC coil drawing 0.42 A at 50/60 Hz. The front is IP20, the terminals are IP00. Dimensions are 115 mm deep, 55 mm wide, and 112 mm high.

Where can I buy 3RT7035-1AH20?

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

Will 3RT7035-1AH20 drop into a panel specified around 3RT5035-1AH00?

Yes. Both are S2 frame contactors with the same DIN-rail footprint and screw-terminal layout. No rewiring or panel modification is needed for a direct swap.

MPN
3RT7035-1AH20