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Siemens 3RH2440-1AN20 — Contactors

Siemens 3RH2440-1AN20 SIRIUS Auxiliary Contactor, 4 NO, 10 A

MPN3RH2440-1AN20
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Siemens SIRIUS auxiliary contactor, size S00, 4 NO instantaneous contacts, 10 A rated operational current at 24 V, screw and snap-on mounting on 35 mm DIN rail.

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

Specifications

3RH2440-1AN20 — Identification
ParameterValue
Contactor frame sizeS00
3RH2440-1AN20 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V10 A
Rated value @ 24 V10 A
Rated value @ 60 V4.7 A
Rated value @ 110 V3 A
Rated value @ 220 V1.2 A
3RH2440-1AN20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz220 V
3RH2440-1AN20 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2440-1AN20 — Connection & Mounting
ParameterValue
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 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
3RH2440-1AN20 — Durability
ParameterValue
Durability (operating cycles, typ.)5 000 000
Durability with aux. switch block (cycles, typ.)5 000 000
3RH2440-1AN20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2440-1AN20 — Mechanical
ParameterValue
Width90 mm
Height57.5 mm
Depth73 mm
3RH2440-1AN20 — Specifications
ParameterValue
At AC4 ... 15 ms

Product details

The 73 mm depth and 90 mm width fit the compact S00 footprint common in motor control centres and panel builds.

The 4 NO contact set gives you four independent signal paths for control logic feedback, interlocks, or status indication. The 10 A rating at 24 V covers most PLC input and relay coil circuits. For higher-voltage control loops, the contactor is rated 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, and 10 A at 230 V. The 5 000 000 typical mechanical cycles mean this contactor will outlast most panel revisions before needing a spare.

Frequently asked questions

What is the closest functional alternative to 3RH2440-1AN20?

The 3RH2440-1AP00 is a close functional peer within the same SIRIUS S00 family. Both are 4 NO auxiliary contactors sharing the same size S00 footprint and DIN-rail mounting. The main difference is in the coil voltage or contact rating — verify your control voltage before substituting.

What are the key dimensions of 3RH2440-1AN20?

Depth is 73 mm, width is 90 mm, and height is 57.5 mm. These dimensions fit the S00 contactor size used across the SIRIUS family.

Will 3RH2440-1AN20 drop into a panel specified for 3RH2440-1AP00?

Yes, both are size S00 with the same 35 mm DIN-rail mounting, same 4 NO contact configuration, and same clearance requirements. The physical swap is direct; only the coil or contact ratings may differ, so check your control voltage.

Where can I buy 3RH2440-1AN20 and how is it quoted?

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 commercial offer.

MPN
3RH2440-1AN20