Maintenance teams planning replacements for REL-IR2-LDP-24DC-2X21 frequently review SMPS Phoenix, Phoenixcontact Rel Ir Bl L 230Ac 4X21 and Phoenix Contact Relay Socket to prevent downtime, checking availability and compatibility with existing systems.
Phoenix REL-IR2/LDP- 24DC/2X21 Single Relay
The Phoenix REL-IR2/LDP- 24DC/2X21 Single Relay (Part No: 2903660 ) offers a 24 V DCnominal input voltage UN, 18.7 V DC ... 46.8 V DC 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-IR2/LDP- 24DC/2X21 |
Phoenix REL-IR2/LDP- 24DC/2X21 Single Relay – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Single relay |
| Mechanical service life | approx. 2x 107 cycles |
| Insulation | Basic insulation |
| Overvoltage category | III |
| Pollution degree | 3 (Rated voltage of 230 V) |
| Service life electrical | see diagram |
| Maximum power dissipation for nominal condition | 1.01 W |
| Test voltage (Winding/contact) | 2.5 kVrms (50 Hz, 1 min., winding/contact) |
| Test voltage (Changeover contact/changeover contact) | 2.5 kVrms (50 Hz, 1 min., changeover contact/changeover contact) |
| Rated insulation voltage | 250 V AC |
| Rated surge voltage | 4 kV |
| Nominal input voltage UN | 24 V DC |
| Input voltage range | 18.7 V DC ... 46.8 V DC |
| Drive and function | monostable |
| Drive (polarity) | polarized |
| Typical input current at UN | 42 mA |
| Typical response time | 14 ms |
| Coil voltage | - |
| Status display | LED (yellow) |
| 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 (At 24 mA) |
| Limiting continuous current | 12 A |
| Maximum inrush current | 30 A (20 ms, N/O contacts) |
| Min. switching current | 5 mA (at 24 V) |
| Interrupting rating (ohmic load) max. | 288 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 |
| Degree of protection (Installation location) | - |
| Ambient temperature (operation) | -40 °C ... 70 °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 | - |
| Switching capacity | - |
| Motor load according to UL 508 | 1/2 HP, 240 V AC |
| 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-IR2/LDP-24DC/2X21 (Part No: 2903660) is a robust Phoenix Plug-in Industrial Relay, Power Contacts engineered to deliver reliable and long-lasting performance in industrial control systems. Operating at a nominal input voltage of 24 V DC and a broad input range from 18.7 V DC to 46.8 V DC, this Single Relay ensures stability and flexibility for multiple automation setups. With a typical input current of 42 mA and a response time of 14 ms, it guarantees fast switching suitable for critical electrical interfaces.
Built with AgNi contact material, this relay supports high conductivity and endurance, providing a continuous current capacity of 12 A and maximum switching voltage of 250 V AC/DC. It features two changeover contacts, ideal for dual-circuit switching. The REL-IR2/LDP-24DC/2X21 offers excellent mechanical durability of approximately 20 million cycles, backed by a rated insulation voltage of 250 V AC and a 2.5 kVrms test voltage for winding-to-contact safety. Its plug-in connection and RT I protection design ensure reliable integration into compact electrical enclosures. Capable of withstanding ambient temperatures from -40 °C to +70 °C, this Phoenix Contact Single Relay meets IEC 60664 standards, making it a dependable solution for industrial-grade automation environments.
The Phoenix Contact REL-IR2/LDP-24DC/2X21 is widely used in control cabinets, process systems, and automation panels where high switching capacity and long service life are crucial. Engineers prefer this Single Relay for managing inductive loads, feedback loops, and signal interfaces in industrial machines. Its robust construction, polarized coil, and LED indication enable stable performance even in harsh operating conditions. Maintenance teams and system integrators value its plug-in design, quick response, and consistent electrical characteristics, making it suitable for machine interlocks, HVAC systems, and power switching circuits. This relay’s mechanical precision, low power dissipation, and compact form make it ideal for continuous industrial operations requiring reliable and efficient control.
Engineers searching for REL-IR2-LDP-24DC-2X21-2903660, REL-IR2/LDP-24DC/2X21, or 2903660 can rely on the quality of Phoenix 2903660 technology. The 2903660 Phoenix relay provides dependable switching for power contact circuits with low maintenance needs and extended life expectancy. Known for its efficiency and durability, this REL Contact model combines energy efficiency with mechanical precision to support modern industrial automation requirements. Trusted for performance and safety, the Phoenix Contact 2903660 and REL-IR2/LDP-24DC/2X21 remain top choices for professionals seeking compact, high-performance relays for critical 24 V DC control applications.
