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Siemens 3RH2440-1AF00 SIRIUS Auxiliary Contactor, 4 NO

MPN3RH2440-1AF00

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Siemens SIRIUS 3RH2440-1AF00 auxiliary contactor, size S00, 4 instantaneous normally open contacts, screw and snap-on mounting on 35 mm DIN rail, 10 A at 230 V AC rated.

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Siemens 3RH2440-1AF00 datasheet (PDF)

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

Specifications

3RH2440-1AF00 — Identification
Parameter	Value
Contactor frame size	S00

3RH2440-1AF00 — Ratings & Performance
Parameter	Value
Rated operational current, AC-12, max.	10 A
Rated value @ 400 V	3 A
Rated value @ 500 V	2 A
Rated value @ 690 V	1 A
Rated value @ 230 V	10 A
Rated value @ 24 V	10 A
Rated value @ 60 V	4.7 A
Rated value @ 110 V	3 A
Rated value @ 220 V	1.2 A

3RH2440-1AF00 — Control & Coil
Parameter	Value
Control supply voltage type	AC
Rated value @ 50 Hz	0.8 ... 1.1
Rated value @ 50 Hz	110 V

3RH2440-1AF00 — Contacts & Poles
Parameter	Value
Auxiliary contact reliability	1 faulty switching per 100 million (17 V, 1 mA)

3RH2440-1AF00 — Connection & Mounting
Parameter	Value
Conductor cross-section, solid or stranded	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, finely stranded w/ ferrule	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting method	screw and snap-on mounting onto 35 mm DIN rail

3RH2440-1AF00 — Durability
Parameter	Value
Durability (operating cycles, typ.)	5 000 000
Durability with aux. switch block (cycles, typ.)	5 000 000

3RH2440-1AF00 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

3RH2440-1AF00 — Mechanical
Parameter	Value
Width	90 mm
Height	57.5 mm
Depth	73 mm

3RH2440-1AF00 — Specifications
Parameter	Value
At AC	4 ... 15 ms

Product details

Auxiliary contactor for control-circuit switching

The Siemens 3RH2440-1AF00 is a SIRIUS auxiliary contactor in the size S00 frame, carrying four instantaneous normally open contacts for control-circuit isolation and signalling.

Panel fit and clearance planning

Dimensions are 73 mm deep, 90 mm wide, and 57.5 mm tall — the S00 footprint fits standard 35 mm DIN-rail enclosures, but the arc-chamber clearance zones are tighter than the body size.