Phoenix REL-IR-BL/L- 24DC/4X21 Single Relay
The Phoenix REL-IR-BL/L- 24DC/4X21 Single Relay (Part No: 1032527 ) offers a 24 V DCnominal input voltage UN, 19.2 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-IR-BL/L- 24DC/4X21 |
Phoenix REL-IR-BL/L- 24DC/4X21 Single Relay – Technical Specifications
| Specification | Value |
|---|---|
| Product type | Single relay |
| Mechanical service life | 3x 107 cycles |
| Insulation | Basic insulation |
| Overvoltage category | III |
| Pollution degree | 2 |
| Service life electrical | see diagram |
| Maximum power dissipation for nominal condition | 759 mW |
| 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 | 5 kV |
| Nominal input voltage UN | 24 V DC |
| Input voltage range | 19.2 V DC ... 46.8 V DC (20 °C) |
| Drive and function | monostable |
| Drive (polarity) | polarized |
| Typical input current at UN | 32 mA |
| Typical response time | 15 ms |
| Typical release time | 10 ms |
| Coil voltage | 24 V DC |
| Status display | Yellow LED (bidirectional) |
| 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 | 12 V (10 mA) |
| Limiting continuous current | 6 A |
| Maximum inrush current | 12 A (20 ms, N/O contacts) |
| Min. switching current | 10 mA (12 V) |
| Interrupting rating (ohmic load) max. | 144 W (24 V DC) |
| Connection method | Plug-in connection |
| Width | 22.5 mm |
| Height | 28 mm |
| Depth | 35.5 mm |
| Degree of protection | RT II |
| Degree of protection (Installation location) | ≥ IP54 (Installation location) |
| Ambient temperature (operation) | -40 °C ... 70 °C |
| Ambient temperature (storage/transport) | -40 °C ... 70 °C |
| Standards/regulations | EN 61810-1 |
| Mounting type | Plug-in mounting |
| Mounting position | any |
The Phoenix Contact REL-IR-BL/L-24DC/4X21 (Part No: 1032527) is a robust Phoenix Polarized Single Relay built for long-life and stable operation in electrical control systems. It runs on a nominal 24 V DC input and accepts 19.2 V DC to 46.8 V DC, providing flexibility in multi-voltage automation environments. The relay features a monostable, polarized drive with a 10 ms response time and a 32 mA input current, supporting up to 6 A continuous load at 250 V AC/DC.
With a mechanical life expectancy of 3 × 10⁷ cycles and 2.5 kVrms insulation between winding and contact, the REL-IR-BL/L-24DC/4X21 ensures electrical endurance and operator safety. Its 759 mW power dissipation keeps temperature rise minimal, while AgNi contacts maintain consistent conductivity and arc resistance. Designed under EN 61810-1 standards and rated RT II with ≥ IP54 installation protection, it performs reliably from -40 °C to 70 °C. Compact dimensions (22.5 mm × 28 mm × 35.5 mm) and plug-in mounting simplify integration in modern relay racks and panel assemblies.
The Phoenix Contact Single Relay REL-IR-BL/L-24DC/4X21 is widely used in automation cabinets, PLC output interfaces, signal feedback circuits, and HVAC relay controls. Maintenance engineers prefer this relay for its quick switching, polarized precision, and long service stability. It performs efficiently in machine interlocks, alarm logic, and power-distribution feedback where safety and timing accuracy are critical. The relay’s durable construction, LED status display, and compact form make it a trusted choice for both OEM panel builders and plant maintenance teams handling continuous operation systems.
Professionals searching for REL-IR-BL-L-24DC-4X21-1032527, REL-IR-BL/L-24DC/4X21, or 1032527 rely on the proven engineering of Phoenix BL relay technology. The Phoenix Contact 1032527 combines reliability with precise contact alignment, ensuring minimal downtime in automated plants. Known for performance comparable to a Phoenix Contact timer relay and accuracy similar to a Phoenix Contact signal converter, this relay offers dependable switching and energy-efficient operation. The Phoenix Contact REL-IR-BL/L-24DC/4X21 remains one of the most trusted 24 V DC Single Relays for engineers seeking longevity and control stability across industrial environments.
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