Skip to main content
Siemens 3RH1122-1AH00 — Contactors

Siemens 3RH1122-1AH00 SIRIUS Auxiliary Contactor, 10 A AC-12

MPN3RH1122-1AH00

Siemens SIRIUS auxiliary contactor, 3RH1122-1AH00, size S00, 2 NO contacts, 10 A AC-12 rated, screw and snap-on mounting, IP20 front protection.

$43.21Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RH1122-1AH00 — Identification
ParameterValue
Contactor frame sizeS00
3RH1122-1AH00 — 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
3RH1122-1AH00 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz48 V
3RH1122-1AH00 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1122-1AH00 — Protection & Coordination
ParameterValue
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RH1122-1AH00 — 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)
3RH1122-1AH00 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH1122-1AH00 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH1122-1AH00 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth72 mm

Product details

It carries 2 normally open (NO) instantaneous contacts rated 10 A at AC-12 (resistive load) and 10 A at 24 V, with a mechanical endurance of 30,000,000 operating cycles. Pollution degree 3 (industrial environment) and an IP20 rating on the front mean it's suited for enclosed control panels where condensation and conductive dust are managed.

The 10 A AC-12 rating is the key figure for resistive control loads — pilot lights, relays, PLC inputs. For inductive loads like contactor coils, the switching capacity drops significantly: at 230 V AC-15 (typical for contactor coils) the rated current is 6 A, and at 400 V it's 3 A. The 24 V DC rating of 10 A is for resistive DC loads; at 110 V DC it drops to 1 A, and at 220 V DC to 0.27 A. These derated values are the ones that govern real-world coil switching, not the headline 10 A. The 2 NO contacts are instantaneous (no make-before-break or delayed switching), so this contactor provides straightforward on/off control without overlapping transitions. The auxiliary switch designation means it's intended to signal the state of a main contactor or perform logic-level switching in a control circuit.

The S00 form factor matches the footprint of Siemens 3RT2 and 3RT1 contactor series for mechanical interlocking and common bus-bar systems. Screw terminals accept solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm² per clamp. The 0 mm side clearance allows side-by-side mounting without derating, saving rail space in dense panels. Shock resistance is rated at 10g for 5 ms and 5g for 10 ms, which covers most industrial vibration profiles from conveyors and pumps. The IP20 front protection means the terminals are touch-safe when installed in an IP54 or higher enclosure.

Frequently asked questions

What are the key ratings I need to check for fit?

The headline rating is 10 A at AC-12 (resistive) and 10 A at 24 V DC. For inductive AC loads like contactor coils, use the AC-15 derated values: 6 A at 230 V, 3 A at 400 V. For DC inductive loads: 1 A at 110 V, 0.27 A at 220 V. The mechanical endurance is 30,000,000 cycles.

What wire sizes does it accept?

The screw terminals accept solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm² per clamp.

Does it drop into a panel designed for a 3RT1015-1AG61 contactor?

The 3RH1122-1AH00 shares the same S00 footprint and DIN-rail mounting as the 3RT1015 series contactors, so it fits the same rail space and bus-bar system. However, the 3RT1015-1AG61 is a main contactor with a coil and power poles; the 3RH1122-1AH00 is an auxiliary contactor with only control contacts. They are not direct substitutes — the 3RH1122-1AH00 is used alongside a main contactor, not in place of one.

MPN
3RH1122-1AH00