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Siemens 3RH2122-2LJ80-0LA0 — Contactors

Siemens 3RH2122-2LJ80-0LA0 SIRIUS Auxiliary Contactor, 72 V

MPN3RH2122-2LJ80-0LA0
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Siemens SIRIUS 3RH2122-2LJ80-0LA0 auxiliary contactor, size S00, 72 V DC coil with varistor suppression, 2 NO + 2 NC instantaneous contacts, 10 A at 230 V, screw and snap-on 35 mm DIN rail.

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

3RH2122-2LJ80-0LA0 — Identification
ParameterValue
Contactor frame sizeS00
3RH2122-2LJ80-0LA0 — 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
3RH2122-2LJ80-0LA0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH2122-2LJ80-0LA0 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2122-2LJ80-0LA0 — Connection & Mounting
ParameterValue
Conductor cross-section, solid or stranded2x (0,5 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail
3RH2122-2LJ80-0LA0 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH2122-2LJ80-0LA0 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2122-2LJ80-0LA0 — Mechanical
ParameterValue
Width45 mm
Height70 mm
Depth116 mm
3RH2122-2LJ80-0LA0 — Specifications
ParameterValue
At AC10 000 1/h

Product details

It carries two normally-open and two normally-closed instantaneous contacts, rated 10 A at 230 V AC and 10 A at 24 V DC, with a coil draw of 13 W DC at pickup. The 72 V DC coil includes a factory-fitted varistor surge suppressor, which clips the inductive kickback — no external flyback diode needed on the coil wiring.

Contact ratings and switching life

The contacts are rated across the full voltage spectrum: 10 A at 24 V, 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, 10 A at 230 V, 3 A at 400 V, 0.5 A at 440 V, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V. The AC switching frequency reaches 10,000 operations per hour; DC switching is limited to 7 to 20 ms per cycle. Arcing time runs 10 to 15 ms.

With a width of 45 mm, depth of 116 mm, and height of 70 mm, it fits the standard S00 footprint.

Frequently asked questions

What clearance is needed around this contactor in the panel?

Required clearances: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the sides. The part is 45 mm wide, 116 mm deep, and 70 mm high — standard S00 footprint.

Does the coil include a surge suppressor?

Yes, the coil has a factory-fitted varistor surge suppressor. No external flyback diode or RC snubber is required on the 72 V DC coil wiring.

MPN
3RH2122-2LJ80-0LA0