3RH2122-2AV60

What type of device is this?

It is an auxiliary contactor (contactor relay) used for switching and distributing control signals in industrial control panels. It provides four auxiliary poles: 2 normally open (NO) and 2 normally closed (NC).

How many contacts does it have and what is the contact arrangement?

It has 4 instantaneous auxiliary contacts in total: 2 NO and 2 NC (often described as 2NO+2NC). The switching element identification is 22E.

What is the control coil voltage and frequency?

The control supply is AC 480 V at 60 Hz. This version is intended for 480 V AC control circuits rather than 24 V or 230 V coils.

What is the permissible coil voltage tolerance during operation?

At 60 Hz, the operating range factor is 0.85 to 1.1 of the rated coil voltage, meaning the coil is designed to operate typically from 85% to 110% of 480 V AC under normal conditions.

What are the coil power consumption values?

Typical apparent power is 37 VA on pick-up and 5.7 VA while held energised.

What are the key current ratings for the auxiliary contacts?

Key ratings include: AC-12 up to 10 A; AC-15 up to 10 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. For DC duties, ratings depend on voltage and whether current paths are in series (for example DC-12 up to 10 A at 24 V with one path, and DC-13 up to 10 A at 24 V with one path).

Can it be used for DC switching as well as AC switching?

Yes. The auxiliary contacts have published DC utilisation category ratings (DC-12 and DC-13). For higher DC voltages, the ratings may require using 2 or 3 current paths in series to increase the permissible switched voltage at a given current.

What does 'spring-type terminal' mean for installation?

It uses spring-loaded terminals for the auxiliary/control wiring. This style is designed for fast, consistent connections without screw tightening torque requirements.

What wire sizes can be connected to the terminals?

For auxiliary contacts, typical connectable conductor cross-sections are: solid or stranded 2x (0.5 to 4 mm²), finely stranded with ferrule 2x (0.5 to 2.5 mm²), and AWG 2x (20 to 12).

How is it mounted in a control cabinet?

It supports screw mounting and snap-on mounting onto a standard 35 mm DIN rail. It can be rotated by ±180° on a vertical mounting surface and tilted forwards/backwards by ±22.5°.

What are the overall dimensions?

Typical dimensions are 45 mm wide, 70 mm high, and 73 mm deep.

Are there spacing requirements when mounting multiple units?

Yes. Typical guidance includes 10 mm clearance forwards/upwards/downwards, with side-by-side mounting allowing 0 mm at the side in some arrangements; additional clearances apply near grounded or live parts.

What is the ingress protection rating?

The front face is rated IP20, and the unit is finger-safe from the front for vertical contact.

What are the insulation and surge ratings?

It has a rated insulation voltage of 690 V (at pollution degree 3) and a rated impulse withstand (surge) voltage of 6 kV.

What is the typical mechanical service life?

Typical mechanical service life is 30,000,000 switching cycles for the contactor mechanism under stated reference conditions.

What are the typical operating times (switching delays)?

Typical values include a closing delay of 8 to 33 ms and an opening delay of 4 to 15 ms (AC), with arcing time typically 10 to 15 ms.

What is the maximum installation altitude and ambient temperature range?

Typical maximum installation altitude is 2,000 m above sea level. Ambient temperature ranges are typically -25 to +60 °C during operation and -55 to +80 °C during storage.

What kind of applications is it commonly used for?

It is commonly used for control circuit switching, interlocking, signal replication (creating extra NO/NC points), PLC I/O interfacing, and general panel automation where a 480 V AC, 60 Hz coil is required. If you need to reference it internally, the full order code is Siemens 3RH2122-2AV60.