Phoenix REL-MR- 24DC/21-21 Single Relay
The Phoenix REL-MR- 24DC/21-21 Single Relay (Part No: 2961192 ) offers a 24 V DCnominal input voltage UN, 15.6 V DC ... 59.52 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- 24DC/21-21 |
Phoenix REL-MR- 24DC/21-21 Single Relay – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Single relay |
| Mechanical service life | 3x 107 cycles |
| Insulation | Basic insulation |
| Overvoltage category | III |
| Pollution degree | 3 |
| Service life electrical | see diagram |
| Maximum power dissipation for nominal condition | 0.41 W |
| Test voltage (Winding/contact) | 5 kV AC (50 Hz, 1 min.) |
| Nominal input voltage UN | 24 V DC |
| Input voltage range | 15.6 V DC ... 59.52 V DC |
| Drive and function | monostable |
| Drive (polarity) | non-polarized |
| Typical input current at UN | 17 mA |
| Typical response time | 7 ms |
| Typical release time | 3 ms |
| Contact switching type | 2 changeover contacts |
| Type of switch contact | Single contact |
| Contact material | AgNi |
| Maximum switching voltage | 250 V AC/DC |
| Minimum switching voltage | 5 V (10 mA) |
| Limiting continuous current | 8 A |
| Maximum inrush current | 25 A (20 ms) |
| Min. switching current | 10 mA (5 V) |
| Interrupting rating (ohmic load) max. | 192 W (24 V DC) |
| Connection method | Plug / solder connection |
| Width | 12.7 mm |
| Height | 29 mm |
| Depth | 15.7 mm |
| Degree of protection | RT III |
| Ambient temperature (operation) | -40 °C ... 85 °C |
| Ambient temperature (storage/transport) | -40 °C ... 85 °C |
| Standards/regulations | IEC 60664 |
| Mounting position | any |
| Coil resistance | 1440 Ω ±10 % (at 20 °C) |
| Switching capacity | 2 A (24 V (DC13)) |
| Motor load according to UL 508 | 1/4 HP, 120 V AC |
The Phoenix Contact REL-MR-24DC/21-21 (Part No: 2961192) is a durable Phoenix 2 Changeover Contacts Single Relay engineered for precision, stability, and energy-efficient performance in control and automation systems. It operates at a nominal input voltage of 24 V DC with an extensive input range from 15.6 V DC to 59.52 V DC, providing exceptional flexibility under varying supply conditions. With a fast 3 ms response time and a typical input current of 17 mA, this Single Relay ensures responsive signal processing in automated systems.
Built with AgNi contact material, the REL-MR-24DC/21-21 supports two changeover contacts for versatile circuit control. It delivers a continuous current capacity of 8 A and can withstand a maximum switching voltage of 250 V AC/DC, making it suitable for resistive and inductive loads alike. The relay’s robust mechanical service life of 3 × 10⁷ cycles ensures consistent operation over extended periods, even in harsh conditions. Designed with a plug/solder connection method and compact dimensions (12.7 mm width × 29 mm height × 15.7 mm depth), it is ideal for space-constrained control panels. Complying with IEC 60664 standards and rated RT III for protection, the Phoenix Contact Single Relay REL-MR-24DC/21-21 guarantees operational safety from -40 °C to +85 °C in both industrial and commercial environments.
The Phoenix Contact REL-MR-24DC/21-21 is widely used in process control panels, PLC interfaces, motor control circuits, and machine automation systems. Engineers prefer this Single Relay for its fast switching capability, high endurance, and stable performance under heavy-duty conditions. Its compact body, low coil power consumption, and long electrical life make it ideal for industrial applications requiring reliability and quick response. This relay supports efficient load control, feedback monitoring, and signal switching in energy management, HVAC control, and manufacturing lines. Maintenance engineers value its easy wiring, minimal heat generation, and robust contact design, ensuring dependable operation in mission-critical automation setups.
Related Products
