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Siemens 3RH1440-1AP00 — Contactors

Siemens 3RH1440-1AP00 SIRIUS Auxiliary Contactor, 4 NO, 10 A

MPN3RH1440-1AP00

Siemens SIRIUS 3RH1440-1AP00 auxiliary contactor, size S00, 4 NO instantaneous contacts, 10 A AC-12 at 24 V, screw and snap-on mounting, IP20 front.

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

Specifications

3RH1440-1AP00 — Identification
ParameterValue
Contactor frame sizeS00
3RH1440-1AP00 — Ratings & Performance
ParameterValue
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 110 V1 A
Rated value @ 220 V0.27 A
3RH1440-1AP00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz230 V
3RH1440-1AP00 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1440-1AP00 — Protection & Coordination
ParameterValue
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RH1440-1AP00 — Connection & Mounting
ParameterValue
Conductor cross-section, solid2x (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)
3RH1440-1AP00 — Durability
ParameterValue
Durability (operating cycles, typ.)5 000 000
Durability with aux. switch block (cycles, typ.)5 000 000
3RH1440-1AP00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH1440-1AP00 — Mechanical
ParameterValue
Width90 mm
Height57.5 mm
Depth72 mm

Product details

It switches control loads in panels where you need extra contact sets beyond the main contactor's built-in auxiliaries. Rated AC-12 at 24 V for 10 A, it handles resistive pilot-duty loads like PLC inputs, relay coils, and indicator lamps. At 230 V AC-15 it carries 6 A; at 400 V AC-15 it carries 3 A — enough for contactor coils and solenoid valves in a typical control panel.

Snap-on or screw-mount onto DIN rail. The S00 footprint — 57.5 mm high, 90 mm wide, 72 mm deep — fits standard panel layouts.

Switching capacity and ratings

AC-12 rating is the headline figure — 10 A at 24 V — but the contactor also carries 1 A at 110 V, 0.27 A at 220 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. These are the AC-15 utilization category values for inductive pilot-duty loads. The 50 Hz rated operational voltage is 230 V; at 60 Hz it's also 230 V. Mechanical endurance is 5 million operations typical — a solid number for a secondary contactor that cycles with the main. Shock resistance is 10g / 5 ms and 5g / 10 ms, adequate for panel-mounted gear in most industrial machinery.

No IP rating on the sides or rear, so side clearances of 0 mm are permissible for ganging.

Frequently asked questions

What is the switching capacity of 3RH1440-1AP00?

AC-12 at 24 V: 10 A; AC-15 at 230 V: 6 A; AC-15 at 400 V: 3 A; AC-15 at 690 V: 1 A. Always confirm the utilization category matches your load type.

Where can I buy 3RH1440-1AP00?

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 price and lead time.

Will 3RH1440-1AP00 drop into a panel designed for 3RH2440-1AP00?

Both are size S00 auxiliary contactors with the same footprint (57.5 x 90 x 72 mm) and screw/snap-on mounting. The 3RH1440-1AP00 has 4 NO contacts; the 3RH2440-1AP00 has 2 NO + 2 NC. If your circuit needs both NO and NC, the 3RH1440-1AP00 won't match without rewiring the load side.

MPN
3RH1440-1AP00