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Siemens 3RT7046-1AH20 — Contactors

Siemens 3RT7046-1AH20 SIRIUS Contactor, 3-Pole, 690V AC-3, S

MPN3RT7046-1AH20

Siemens SIRIUS S3 contactor, 3RT7046-1AH20, 3-pole, 690 V AC-3 rated, screw-type terminals, IP20 front, active lifecycle.

Siemens 3RT7046-1AH20 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT7046-1AH20 — Identification
ParameterValue
Contactor frame sizeS3
3RT7046-1AH20 — Ratings & Performance
ParameterValue
Rated value @ 400 V3 A
Rated value @ 690 V1 A
Rated value @ 230 V6 A
3RT7046-1AH20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.27
Rated value @ 50 Hz42 V
3RT7046-1AH20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliabilityacceptability for PLC control (17 V, 5 mA)
3RT7046-1AH20 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegL/gG NH 3NA: 200 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT7046-1AH20 — 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 and 75 mm DIN rail
Side-by-side mountingYes
3RT7046-1AH20 — Environmental
ParameterValue
Operating temperature range-10 ... +55 °C
Storage temperature range-25 ... +70 °C
Installation altitude, max.2 000 m
3RT7046-1AH20 — Mechanical
ParameterValue
Width70 mm
Height148 mm
Depth139 mm

Product details

SIRIUS S3 contactor for motor switching

The screw-type terminals on both main and auxiliary circuits accept 2x (0.5...1.5 mm²) solid or stranded, or 2x (0.75...2.5 mm²) finely stranded with ferrules — a practical range for motor branch circuits up to the contactor's rating.

The DC magnet coil draws 0.7 W during closing and holds at 0.29 W — low enough for direct PLC output drive without an interposing relay in most cases. The control circuit terminals are screw-type, same as the main circuit, keeping your wiring tooling consistent across the panel. Rated surge voltage resistance is 6 kV, which aligns with IEC 60947-1 coordination for industrial environments.

Environmental and protection ratings

Operating temperature range is -10 to +55 °C, storage from -25 to +70 °C.

Frequently asked questions

What are the key ratings for 3RT7046-1AH20?

Three-pole normally-open main contacts rated for AC-3 duty up to 690 V maximum. The contactor is Size S3, mounts on 35 mm or 75 mm DIN rail, and uses screw-type terminals for both main and auxiliary circuits. Coil holding power is 0.29 W DC.

Where can I buy 3RT7046-1AH20?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer.

What is the difference between 3RT7046-1AH20 and 3RT6028-1AB00?

The 3RT6028-1AB00 is a smaller Size S0 contactor with a lower AC-3 rating, while the 3RT7046-1AH20 is a Size S3 with higher current capacity and a 690 V AC-3 maximum. The S3 has a wider 70 mm footprint versus the S0's narrower body, so a panel designed for the S0 may need enclosure modifications to accommodate the larger S3 contactor.

MPN
3RT7046-1AH20