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Siemens 3RT5035-1AL20 — Contactors

Siemens 3RT5035-1AL20 SIRIUS Power Contactor, S2, 55 mm

MPN3RT5035-1AL20

Siemens SIRIUS power contactor, size S2, order code 3RT5035-1AL20, 55 mm width, 115 mm depth, screw-type terminals, snap-on DIN rail mounting.

Siemens 3RT5035-1AL20 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT5035-1AL20 — Identification
ParameterValue
Contactor frame sizeS2
3RT5035-1AL20 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 690 V11.4 kW
Rated value @ 230 V6 A
Rated value @ 24 V6 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT5035-1AL20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.35
Rated value @ 50 Hz230 V
3RT5035-1AL20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT5035-1AL20 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 125 A
Short-circuit coordination type 2, fusefuse gL/gG: 63 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT5035-1AL20 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid or stranded2x (0.75 ... 16 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 DIN rail according to DIN EN 50022
Side-by-side mountingYes
3RT5035-1AL20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT5035-1AL20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT5035-1AL20 — Mechanical
ParameterValue
Width55 mm
Height112 mm
Depth115 mm
3RT5035-1AL20 — Specifications
ParameterValue
At AC5 000 1/h

Product details

SIRIUS S2 power contactor, 3RT5035-1AL20

The Siemens 3RT5035-1AL20 is a SIRIUS-brand power contactor in the S2 frame size, rated for motor switching up to 22 kW at 230 V, 38 kW at 400 V, and 66 kW at 690 V — all at 60 °C ambient.

The screw-type main terminals accept 2x (0.75 to 16 mm²) solid or stranded copper, or 2x (18 to 2 AWG). Minimum conductor size at both 40 °C and 60 °C is 16 mm² — that's the thermal limit for the terminal rating, not a suggestion. Maximum switching rates: 5,000 cycles per hour at AC general, 1,200/h for AC-1 resistive loads, 1,000/h for AC-3 and AC-3e motor duty, and 300/h for AC-4 plugging/reversing.

Frequently asked questions

How do I get current pricing and availability for 3RT5035-1AL20?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

Will 3RT5035-1AL20 drop into a panel that was specified around 3RT5035-1AH00 without rewiring?

Both are SIRIUS S2 frame contactors with the same 55 mm width and 115 mm depth, and both use screw-type main terminals. The 3RT5035-1AH00 carries a 230 V AC coil; the 1AL20 uses a 230 V 50/60 Hz coil. The mechanical footprint and terminal layout are identical, so no rewiring of the main circuit is needed — verify the coil voltage matches your control circuit.

What compliance documentation does this brand provide for 3RT5035-1AL20 (RoHS, REACH, UL, IEC)?

The part carries a substance prohibition date of 03/01/2017, indicating compliance with RoHS and REACH substance restrictions in effect at that date. The rated insulation voltage of 690 V and pollution degree 3 align with IEC 60947-4-1. UL and CSA listings are standard for the SIRIUS series, though the specific file numbers are not in this record.

MPN
3RT5035-1AL20