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Siemens 3RT7035-1AL20 — Contactors

Siemens 3RT7035-1AL20 Contactor, S2, 3-Pole, AC Coil, 690V A

MPN3RT7035-1AL20

Siemens SIRIUS 3RT7035-1AL20, size S2 contactor, 3-pole, screw terminals, AC coil, 690 V AC-3 max, IP20 front.

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

Specifications

3RT7035-1AL20 — Identification
ParameterValue
Contactor frame sizeS2
3RT7035-1AL20 — Ratings & Performance
ParameterValue
Rated value @ 400 V3 A
Rated value @ 690 V1 A
Rated value @ 230 V6 A
3RT7035-1AL20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.42
Rated value @ 50 Hz230 V
3RT7035-1AL20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliabilityacceptability for PLC control (17 V, 5 mA)
3RT7035-1AL20 — 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
3RT7035-1AL20 — 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
3RT7035-1AL20 — Environmental
ParameterValue
Operating temperature range-10 ... +55 °C
Storage temperature range-25 ... +70 °C
Installation altitude, max.2 000 m
3RT7035-1AL20 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth115 mm

Product details

It carries three main NO contacts and an AC-operated coil, with screw-type terminals on both the main and auxiliary circuits.

The AC coil pulls 0.73 W to close and holds at 0.41 W, so the control transformer sizing should account for the inrush, not just the sealed power. Maximum switching rate is 800 operations per hour in AC-3 and 250 per hour in AC-4 (plugging / inching duty). If your application needs frequent reversing or jogging, stay under the AC-4 ceiling or the contactor will overheat.

Side-by-side mounting is allowed with no derating penalty — useful when packing multiple contactors in a tight row. Dimensions are 55 mm wide, 112 mm high, 115 mm deep, so it fits standard S2 panel cutouts.

Frequently asked questions

Where can I buy 3RT7035-1AL20?

It is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

What are the key ratings of 3RT7035-1AL20?

Three-pole contactor, size S2, AC coil, AC-3 rated voltage maximum 690 V, screw terminals, IP20 front, IP00 terminals.

Will 3RT7035-1AL20 drop into a panel that was specified around 3RT5036-1AP00 without rewiring?

Both are S2-size contactors with screw terminals, so the footprint and wiring pattern are the same. The 3RT7035-1AL20 uses an AC coil while the 3RT5036-1AP00 uses DC — verify your control voltage type before swapping.

MPN
3RT7035-1AL20