If you’re not fully sure about REL-IR4-L-230AC-4X21, taking a closer look at SMPS Phoenix, Phoenixcontact Rel Ir Bl L 230Ac 4X21 and Phoenixcontact Phoenix Contact Industrial Ethernet Switches often helps compare reliability, cost, and availability.
Phoenix REL-IR4/L-230AC/4X21 Single Relay
The Phoenix REL-IR4/L-230AC/4X21 Single Relay (Part No: 2903688 ) offers a 230 V ACnominal input voltage UN, 179.4 V AC ... 317.4 V AC (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/L-230AC/4X21 |
Phoenix REL-IR4/L-230AC/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 | 1.5 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 | 230 V AC |
| Input voltage range | 179.4 V AC ... 317.4 V AC (20 °C) |
| Drive and function | monostable |
| Drive (polarity) | non-polarized |
| Typical input current at UN | 6.5 mA |
| Typical response time | - |
| Coil voltage | - |
| 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 |
| Degree of protection (Installation location) | - |
| Ambient temperature (operation) | -40 °C ... 55 °C |
| Ambient temperature (storage/transport) | -40 °C ... 85 °C |
| Standards/regulations | IEC 60664 |
| Mounting type | - |
| Mounting position | any |
| Mains frequency | 50/60 Hz |
| Typical release time range | 5 ms ... 20 ms (depending on phase relation) |
| Coil resistance | - |
| Switching capacity | 2 A (at 24 V, DC13) |
| Motor load according to UL 508 | - |
| 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-IR4/L-230AC/4X21 (Part No: 2903688) is engineered to deliver consistent switching performance in industrial environments. Operating at a nominal input voltage of 230 V AC, it supports a wide input range of 179.4 V AC to 317.4 V AC, making it suitable for fluctuating mains supply scenarios. The relay draws a typical input current of 6.5 mA and features basic insulation rated to 250 V AC, ensuring electrical safety during long-term operation.
Equipped with 4 changeover contacts using AgNi contact material, the REL-IR4/L-230AC/4X21 handles a maximum switching voltage of 250 V AC/DC and delivers reliable load control with a limiting continuous current of 6 A. Its high tolerance for switching peaks is reflected in the inrush current capacity of 16 A (20 ms), while a minimum switching voltage of 5 V and current of 5 mA ensure stability even at low signal levels. Designed for longevity, it offers a mechanical life of 20 million cycles and a power dissipation of only 1.5 W at nominal conditions.
The relay’s compact 21.2 mm width and plug-in connection simplify installation in densely packed control cabinets. Compliant with IEC 60664 standards and rated for ambient temperatures from -40 °C to +55 °C, this relay is built to withstand harsh industrial conditions. To view more models or technical details, visit the Phoenix Relay category or the Phoenix Contact brand page.
This 1.5 W Maximum Power Single Relay is commonly used in power distribution units, remote I/O systems, and machine control panels. Its ability to handle high inrush currents ensures smooth operation when switching inductive loads like coils or motors. With a wide input voltage tolerance and stable response under load variations, it meets the practical needs of both OEM panel builders and plant maintenance teams.
For students and early-career automation engineers, the REL-IR4/L-230AC/4X21 provides a hands-on example of how multi-contact relays function in real-world environments. From switching capacity to phase-dependant timing, it demonstrates the principles of AC relay design in both control and protection applications.
