During technical comparisons, REL-MR-110DC-21HC appears alongside SMPS Phoenix, Phoenixcontact Rel Ir Bl L 230Ac 4X21 and Phoenixcontact Phoenix Contact Industrial Ethernet Switches so engineers assess signal types, ingress protection, and ambient tolerances accurately.
Phoenix REL-MR-110DC/21HC Single Relay
The Phoenix REL-MR-110DC/21HC Single Relay (Part No: 2961338 ) offers a 110 V DCnominal input voltage UN, 71.5 V DC ... 264 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-110DC/21HC |
Phoenix REL-MR-110DC/21HC Single Relay – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Single relay |
| Mechanical service life | 3x 107 cycles |
| Insulation | - |
| Overvoltage category | III |
| Pollution degree | 3 |
| Service life electrical | see diagram |
| Maximum power dissipation for nominal condition | 0.45 W |
| Test voltage (Winding/contact) | 5 kV AC (50 Hz, 1 min., winding/contact) |
| Test voltage (Changeover contact/changeover contact) | - |
| Rated insulation voltage | - |
| Rated surge voltage | - |
| Nominal input voltage UN | 110 V DC |
| Input voltage range | 71.5 V DC ... 264 V DC |
| Drive and function | monostable |
| Drive (polarity) | non-polarized |
| Typical input current at UN | 4.1 mA |
| Typical response time | 3 ms |
| Coil voltage | - |
| Status display | - |
| Contact switching type | 1 changeover contact |
| Type of switch contact | Single contact |
| Contact material | AgNi |
| Maximum switching voltage | 250 V AC/DC |
| Minimum switching voltage | 12 V (at 10 mA) |
| Limiting continuous current | 16 A |
| Maximum inrush current | 50 A (20 ms) |
| Min. switching current | 10 mA (at 12 V) |
| Interrupting rating (ohmic load) max. | 384 W (at 24 V DC) |
| Connection method | Plug / solder connection |
| Width | 12.7 mm |
| Height | 29 mm |
| Depth | 15.7 mm |
| Degree of protection | RT II |
| 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 | 26600 Ω ±15 % (at 20 °C) |
| Switching capacity | 2 A (at 24 V, DC13) |
| Motor load according to UL 508 | 1/2 HP, 120 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-110DC/21HC (Part No: 2961338) is a monostable Single Relay purpose-built for long-term stability and electrical durability. It works on a nominal input voltage of 110 V DC, supporting a broad operating range of 71.5 V DC to 264 V DC, making it suitable for systems where voltage fluctuations are common. With a typical input current of just 4.1 mA and a response time of 3 ms, this relay ensures fast and energy-efficient switching performance.
Engineered with AgNi contact material, it features a single changeover contact capable of handling both inductive and resistive loads with precision. The maximum switching voltage is 250 V AC/DC, and it supports a limiting continuous current of 16 A, withstanding up to 50 A of inrush current for 20 milliseconds. Its minimum switching threshold is 12 V at 10 mA, which provides excellent compatibility with low-signal environments. The relay also delivers a high interrupting capacity of 384 W at 24 V DC for ohmic loads, ensuring robustness under demanding electrical conditions.
Designed to withstand harsh industrial environments, the REL-MR-110DC/21HC is protected to RT II sealing standards and can operate in ambient temperatures from -40 °C to +85 °C. It also meets IEC 60664 standards for insulation and overvoltage category III, confirming its safety and compliance in global applications. The relay’s compact form factor—measuring just 29 mm in height and 12.7 mm in width—along with its plug/solder connection method, allows easy installation in space-limited panels. This model offers a mechanical service life of 30 million cycles, making it a reliable, low-maintenance component trusted by OEMs and industrial control engineers alike. To browse more relays in this series, visit the Phoenix Relay product page or the full brand range at Phoenix Contact.
In educational settings, this relay helps engineering students understand practical aspects of electromechanical switching, response timing, and relay insulation safety. For senior maintenance engineers, the extended temperature range and high service life reduce field failures and improve uptime. Whether you're building new control panels or upgrading legacy relay systems, the REL-MR-110DC/21HC delivers long-lasting, trusted performance.
