Maintenance teams planning replacements for REL-MR-12DC-21 frequently review SMPS Phoenix and Phoenixcontact Phoenix Contact Industrial Ethernet Switches to prevent downtime, checking availability and compatibility with existing systems.
Phoenix REL-MR- 12DC/21 Single Relay
The Phoenix REL-MR- 12DC/21 Single Relay (Part No: 2961150 ) offers a 12 V DCnominal input voltage UN, 7.2 V DC ... 33 V DC input voltage range, 250 V AC/DC switching voltage, Plug / solder connection method. Manufactured by Phoenix under the Phoenix Single Relay category, this model belongs to the Phoenix REL Series.
| Brand | Phoenix Contact |
| Product Type | Single Relay |
| Model Number | REL-MR- 12DC/21 |
Phoenix REL-MR- 12DC/21 Single Relay – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Single relay |
| Mechanical service life | 2x 107 cycles |
| Insulation | - |
| Overvoltage category | III |
| Pollution degree | 3 |
| Service life electrical | - |
| Maximum power dissipation for nominal condition | 0.17 W |
| Test voltage (Winding/contact) | 4 kV AC (50 Hz, 1 min., winding/contact) |
| Test voltage (Changeover contact/changeover contact) | - |
| Rated insulation voltage | - |
| Rated surge voltage | - |
| Nominal input voltage UN | 12 V DC |
| Input voltage range | 7.2 V DC ... 33 V DC |
| Drive and function | monostable |
| Drive (polarity) | non-polarized |
| Typical input current at UN | 14 mA |
| Typical response time | 2.5 ms |
| Coil voltage | - |
| Status display | - |
| Contact switching type | 1 changeover contact |
| Type of switch contact | Single contact |
| Contact material | AgSnO |
| Maximum switching voltage | 250 V AC/DC |
| Minimum switching voltage | 5 V (at 100 mA) |
| Limiting continuous current | 6 A |
| Maximum inrush current | 10 A (4 s) |
| Min. switching current | 10 mA (at 12 V) |
| Interrupting rating (ohmic load) max. | 140 W (at 24 V DC) |
| Connection method | Plug / solder connection |
| Width | 5 mm |
| Height | 28 mm |
| Depth | 15 mm |
| Degree of protection | RT III |
| Degree of protection (Installation location) | - |
| Ambient temperature (operation) | -40 °C ... 85 °C |
| Ambient temperature (storage/transport) | -40 °C ... 85 °C |
| Standards/regulations | IEC 60664 |
| Mounting type | - |
| Mounting position | any |
| Mains frequency | - |
| Typical release time range | - |
| Coil resistance | 848 Ω ±10 % (at 20 °C) |
| Switching capacity | 2 A (at 24 V, DC13) |
| Motor load according to UL 508 | 1/4 HP, 240 - 277 V AC (N/O contact) |
| Input power dissipation for UN | - |
| 3-phase motor load | - |
| Product family | - |
| Relay type | - |
| Test voltage () | - |
| Degree of protection (Relay) | - |
| Inrush current, minimum | - |
| Non-operate voltage | - |
| Safe operate voltage | - |
| Test voltage (N/O contact / N/O contact) | - |
The Phoenix Contact REL-MR-12DC/21 operates at a nominal input voltage of 12 V DC and supports a wide input range from 7.2 V DC to 33 V DC. This 12VDC Input Voltage Relay offers a durable mechanical service life of 2 × 10⁷ cycles and features a single changeover contact using AgSnO material. It handles up to 6 A continuous current and a maximum switching voltage of 250 V AC/DC. Identified by Part No: 2961150, this relay ensures stable and safe operation in demanding automation applications.
With a low input current of 14 mA and a fast response time of 2.5 ms, it suits time-critical control logic and compact systems. The plug/solder connection simplifies wiring and replacement, while its 5 mm width is ideal for dense panel layouts. Built to meet IEC 60664 standards and protected by RT III, the relay performs reliably in environments ranging from -40 °C to +85 °C. The 140 W interrupting capacity at 24 V DC supports control of both resistive and inductive loads.
The REL-MR-12DC/21 is widely used in PLC I/O extensions, relay output modules, machine signal routing, and low-voltage automation logic. It provides dependable switching without taking up unnecessary panel space, making it a smart fit for modern industrial systems where precision, durability, and compactness are priorities.
Visit the Phoenix Contact brand page for more industrial solutions. For full details and datasheets on REL-MR-12DC/21, go to the Phoenix Relay product page.
