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Siemens 3RN2010-2CA30 — Process / Temperature Controllers

Siemens 3RN2010-2CA30 SIRIUS Thermistor Motor Protection Rel

MPN3RN2010-2CA30
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Siemens SIRIUS 3RN2 thermistor motor protection relay, 3RN2010-2CA30, 24 V AC/DC rated supply, 1 A output, IP20, screw/snap-on DIN rail mount.

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

Specifications

3RN2010-2CA30 — Identification
ParameterValue
Product functionthermistor motor protection
Product designationThermistor motor protection relay
Product line / brand nameSIRIUS
3RN2010-2CA30 — Electrical
ParameterValue
Rated value (50 Hz)24 ... 24 V
Rated value (60 Hz)24 ... 24 V
3RN2010-2CA30 — Communication
ParameterValue
Electrical connection typespring-loaded terminal (push-in)
3RN2010-2CA30 — Environmental
ParameterValue
Ingress protection (IP rating), wiredIP20
Installation altitude, max.2 000 m
3RN2010-2CA30 — Mechanical
ParameterValue
Fastening methodscrew and snap-on mounting onto 35 mm DIN rail
Mounting positionany
Width17.5 mm
Height100 mm
Depth90 mm
Conductor cross-section, solid20 ... 12
Conductor cross-section, finely stranded (with ferrule)0.5 ... 2.5 mm²
Mounting clearance, top0 mm
Mounting clearance, rear0 mm
Mounting clearance, side0 mm
Mounting clearance, front0 mm

Product details

The Siemens SIRIUS 3RN2010-2CA30 is a compact thermistor motor protection relay designed to monitor motor winding temperature via PTC thermistor sensors.

IP20 rated for enclosure use. No clearance gaps required upwards, forwards, backwards, downwards, or at the sides (all 0 mm), so it can be packed tightly in a rail assembly.

The relay supports auto-reset after a trip, with a response threshold set at 85 % of the sensor's nominal resistance (initial value) and a full-scale trip at 110 %. It includes a green LED for status indication. Galvanic isolation exists between input and output, and between the outputs themselves, which helps avoid ground loops in control panels.

Frequently asked questions

What are the key ratings for this relay?

Rated control supply voltage is 24 V AC/DC. The output switches 1 A at 24 V and 0.2 A at 125 V. Operating temperature range is -25 to +60 °C, storage -40 to +85 °C. Protection class IP20.

What compliance documentation is available?

The part carries a substance prohibitance date of 05/28/2009, indicating RoHS compliance. No UL or specific IEC certification is listed in the record, but the SIRIUS series typically meets IEC/EN 60947 standards.

How is this relay mounted and wired?

It snaps onto 35 mm DIN rail with a screw clamp. Accepts solid or stranded wire 20–12 AWG. No side or end clearance is required, so modules can be placed flush.

MPN
3RN2010-2CA30