Siemens SIRIUS 3RN1010-1CB00 Thermistor Motor Protection Relay 24 V AC/DC, Auto Reset – used
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Siemens SIRIUS 3RN1010-1CB00 Thermistor Motor Protection Relay 24 V...
Siemens SIRIUS 3RN1010-1CB00 Thermistor Motor Protection Relay 24 V AC/DC
Standard PTC evaluation unit with automatic reset – 1 NO + 1 NC, screw terminals, 22.5 mm wide.
| Manufacturer | Siemens |
| Product line | SIRIUS 3RN10 |
| Order number / MPN | 3RN1010-1CB00 |
| Device type | Thermistor motor protection relay / PTC evaluation unit |
| Version | Standard evaluation unit, AUTO |
| Control supply voltage | 24 V AC, 50/60 Hz, or 24 V DC |
| Sensor circuits | 1 |
| Output contacts | 1 NO + 1 NC |
| Switching capacity DC-13 | 2 A at 24 V · 0.2 A at 125 V · 0.1 A at 240 V |
| Switching capacity AC-15 | 3 A at 240 V |
| Max. fuse | 6 A gL/gG |
| Reset | Automatic |
| Indication | LED READY / TRIPPED |
| Terminals | Screw terminals, tightening torque 0.8–1.2 Nm |
| Degree of protection | IP20 |
| Dimensions (W × H × D) | approx. 22.5 × 92 × 91 mm |
| Net weight | approx. 131 g |
| Mounting | DIN rail / screw and snap-on mounting |
| Operating temperature | -25 to +60 °C |
| Standards | IEC 60947-5-1 · VDE 0660 · EN 50081-2 · EN 50082-2 · UL / CSA listed |
| EAN | 4011209437661 |
| Country of origin | Germany |
| Product status | Discontinued by the manufacturer; successor 3RN2010-1CA30 |
| Condition | Used · 2 – Good · Tested |
Product description
The Siemens SIRIUS 3RN1010-1CB00 is a standard evaluation unit for thermal motor protection with PTC thermistor sensors. The sensors built into the motor winding are monitored via terminals T1 and T2. When the motor temperature rises above the permissible threshold, the unit detects the increased sensor resistance and switches its output contacts.
The AUTO version resets automatically: once the overtemperature is cleared and the motor has cooled down, the relay returns to the ready state on its own. The READY and TRIPPED LEDs on the front allow a quick status check.
A proven replacement part for machines, pumps, fans, compressors and other industrial drives with PTC temperature monitoring. Siemens lists 3RN2010-1CA30 as the preferred successor.
Tested: we have tested this item and it is fully functional. Original Siemens used part in clean condition with at most light cosmetic traces; some units may carry an equipment label from the previous owner. The photos show a representative unit from our stock; delivery is the relay as shown.
Compatibility & applications
| A1 / A2 | Control supply voltage 24 V AC/DC |
| T1 / T2 | PTC sensor circuit in the motor winding |
| 95 / 96 | NC contact, opens on trip |
| 97 / 98 | NO contact, closes on trip |
| READY | LED ready for operation |
| TRIPPED | LED overtemperature / tripped |
Scope of delivery
1 × Siemens 3RN1010-1CB00 as shown. Installation and commissioning by a qualified electrician.
Shipping to the USA & worldwide
In stock in Germany and shipped via FedEx or UPS, usually on the day of your order. Transit to the US typically takes 2–5 business days with full tracking. Import duties and fees follow the US regulations in force on the import date and are settled by the importer. More background on availability and pricing of legacy CNC electronics: read our guide for US customers.
Shipping, duties and warranty at a glance: Shipping to the USA.
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