Phoenix REL-IR4/LDP- 24DC/4X21AU Single Relay
The Phoenix REL-IR4/LDP- 24DC/4X21AU Single Relay (Part No: 2903670 ) offers a 24 V DCnominal input voltage UN, 18.7 V DC ... 46.8 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- 24DC/4X21AU |
Phoenix REL-IR4/LDP- 24DC/4X21AU 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 | 1.01 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 | 24 V DC |
| Input voltage range | 18.7 V DC ... 46.8 V DC (20 °C) |
| Drive and function | monostable |
| Drive (polarity) | polarized |
| Typical input current at UN | 42 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 |
The Phoenix Contact REL-IR4/LDP-24DC/4X21AU (Part No: 2903670) delivers stable and precise signal switching in modern automation control panels. Operating at a nominal input voltage of 24 V DC, it supports a wide range from 18.7 V to 46.8 V DC, offering flexibility for various industrial voltage environments. Built with AgNi contact material, the relay offers 4 changeover contacts and handles up to 250 V AC/DC maximum switching voltage. With a mechanical service life of 2 × 10⁷ cycles and an interrupting rating of 144 W at 24 V DC, it provides excellent longevity for repetitive operations. It supports a limiting continuous current of 6 A and manages inrush currents up to 16 A on N/O contacts, making it suitable for motor and inductive load switching. The typical input current is 42 mA, and the response time is 14 ms, ensuring fast actuation. The relay features a plug-in connection method with dimensions of 21.2 mm width, 27.5 mm height, and 35.6 mm depth, optimizing it for space-constrained enclosures. With a protection class of RT I, a yellow LED status indicator, and compliance with IEC 60664, it’s engineered for both reliability and safety in harsh environments.
To the full range of Phoenix Contact components, or to view our complete lineup of Phoenix Relay products, visit IndMALL’s official catalog. Request a quote now for REL-IR4/LDP-24DC/4X21AU to get competitive pricing and verified supplier support.
Related Products
