Phoenix REL-IR4/LDP-220DC/4X21 Single Relay
The Phoenix REL-IR4/LDP-220DC/4X21 Single Relay (Part No: 2903682 ) offers a 220 V DCnominal input voltage UN, 171.6 V DC ... 396 V DC (20 °C) input voltage range, 250 V AC/DC switching voltage, Plug-in 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-IR4/LDP-220DC/4X21 |
Phoenix REL-IR4/LDP-220DC/4X21 Single Relay – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Single relay |
| Mechanical service life | approx. 2x 107 cycles |
| Insulation | Basic insulation |
| Overvoltage category | II |
| Pollution degree | 2 |
| Service life electrical | see diagram |
| Maximum power dissipation for nominal condition | 0.88 W |
| Test voltage (Winding/contact) | 2.5 kVrms (50 Hz, 1 min., winding/contact) |
| Test voltage (Changeover contact/changeover contact) | 2 kVrms (50 Hz, 1 min., changeover contact/changeover contact) |
| Rated insulation voltage | 250 V AC |
| Rated surge voltage | 2.5 kV |
| Nominal input voltage UN | 220 V DC |
| Input voltage range | 171.6 V DC ... 396 V DC (20 °C) |
| Drive and function | monostable |
| Drive (polarity) | non-polarized |
| Typical input current at UN | 4 mA |
| Typical response time | 13 ms |
| Typical release time | 14 ms |
| Status display | LED (yellow) |
| Contact switching type | 4 changeover contacts |
| Type of switch contact | Single contact |
| Contact material | AgNi |
| Maximum switching voltage | 250 V AC/DC |
| Minimum switching voltage | 5 V (At 24 mA) |
| Limiting continuous current | 6 A |
| Maximum inrush current | 16 A (20 ms, N/O contacts) |
| Min. switching current | 5 mA (at 24 V) |
| Interrupting rating (ohmic load) max. | 144 W (at 24 V DC) |
| Connection method | Plug-in connection |
| Width | 21.2 mm |
| Height | 27.5 mm |
| Depth | 35.6 mm |
| Degree of protection | RT I |
| Ambient temperature (operation) | -40 °C ... 70 °C |
| Ambient temperature (storage/transport) | -40 °C ... 85 °C |
| Standards/regulations | IEC 60664 |
| Mounting position | any |
| Switching capacity | 2 A (at 24 V, DC13) |
| Motor load according to UL 508 | 1/3 HP, 240 V AC |
| Non-operate voltage | ≤ 132 V DC |
| Safe operate voltage | ≥ 176 V DC |
Designed for high-voltage DC control systems, the Phoenix Contact REL-IR4/LDP-220DC/4X21 (Part No: 2903682) is a high-precision Single Relay engineered to operate at a nominal input voltage of 220 V DC. With an extended input range of 171.6 V to 396 V DC, this relay ensures consistent performance even under unstable power conditions. The typical input current of just 4 mA makes it highly energy-efficient, especially in systems with continuous relay operation. Internally, it features 4 changeover contacts with AgNi contact material that can reliably switch up to 250 V AC/DC—ideal for both signal and power-level applications.
This 220 V DC Coil Voltage Single Relay offers a solid mechanical service life of approximately 20 million cycles, demonstrating its durability in long-term industrial use. The unit’s interrupting capacity of 144 W at 24 V DC and a maximum inrush current of 16 A (20 ms) allow it to handle varying load profiles, including inductive or resistive components. Its minimum switching voltage is just 5 V (at 24 mA), enabling accurate control of low-level signals. With a fast response time of 14 ms and non-polarized monostable drive design, the relay ensures rapid signal transitions and seamless integration into automation logic.
Safety and reliability are further reinforced with basic insulation, RT I protection rating, and full compliance with IEC 60664 standards. Built with a compact body (21.2 mm width) and plug-in connection method, it simplifies installation within dense control cabinets. The relay remains stable in a wide operating temperature range from -40 °C to +70 °C, making it dependable for manufacturing plants, infrastructure systems, and process industries. To view more high-performance relays from this trusted brand, visit the official Phoenix Contact page or the full Phoenix Relay Collection.
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