$ 174.80
High-reliability Phoenix Contact REL-IR4/L-230AC/4X21AU single relay with gold-plated contacts, 230V AC coil, LED indicator, and long service life.
The Phoenix Contact REL-IR4/L-230AC/4X21AU Single Relay is engineered to provide reliable switching in industrial environments where precision and endurance are essential. Built with four changeover contacts and enhanced with hard gold plating, it offers dependable conductivity and a long service life. An integrated LED indicator and test button simplify monitoring and verification during operation. With a rated coil voltage of 230 V AC and robust insulation up to 250 V, the relay ensures safe operation across a broad temperature range. This makes it an ideal choice for engineers seeking stable performance in automation, control, and protection systems.
The REL-IR4/L-230AC/4X21AU relay delivers a combination of strength and versatility. Its plug-in design supports quick installation and compatibility with standardized relay bases, reducing setup time and maintenance effort. The gold-plated contacts safeguard against oxidation, ensuring dependable low-voltage switching while still handling higher loads when necessary. With a mechanical lifespan reaching into tens of millions of cycles, this relay is suited for continuous-duty applications in process control, machine building, and power distribution. Operators benefit from clear status feedback, easy testing during maintenance, and consistent operation, helping lower downtime, extend system reliability, and optimize long-term performance in critical systems.
Why Phoenix Contact REL-IR4/L-230AC/4X21AU?
The Phoenix Contact REL-IR4/L-230AC/4X21AU stands out for its balance of durability and precision. With gold-plated contacts for reliable low-signal switching, a built-in LED for instant feedback, and a long service life of millions of cycles, it is trusted in demanding industrial systems. Its plug-in design and universal mounting options make it both practical and efficient, helping engineers simplify integration without compromising reliability.
What problem does it solve?
In industrial environments, inconsistent relay performance often leads to downtime, costly maintenance, and unreliable switching. The REL-IR4/L-230AC/4X21AU addresses this by combining robust insulation, fast response times, and oxidation-resistant contacts. It ensures stable operation even in harsh conditions, reducing failures in control panels, power distribution, and automation systems. By delivering reliable switching across a wide range of loads, it eliminates weak links in electrical control, ensuring long-term stability and efficiency.
| Feature | Details | Benefit |
|---|---|---|
| Relay Type | Single relay, plug-in design | Easy integration and quick replacement in relay bases |
| Contacts | 4 changeover contacts, AgNi with hard gold plating | Reliable low-signal switching, resistant to wear and oxidation |
| Coil Voltage | 230 V AC, 50/60 Hz | Compatible with standard industrial AC power supplies |
| Response Time | 5–15 ms | Fast switching ensures precise control in automation |
| Release Time | 5–20 ms | Provides stable switching performance |
| Service Life (Mechanical) | Approx. 20 million cycles | Long-lasting durability for continuous industrial use |
| Electrical Rating | Up to 6 A at 250 V AC/DC | Suitable for power and control applications |
| Operating Temperature | -40 °C … +55 °C | Reliable in demanding and harsh environments |
| Status Display | Integrated LED (yellow) | Quick visual feedback for operational status |
| Test Function | Manual test button & position indicator | Simplifies maintenance and troubleshooting |
| Connection Method | Plug-in to compatible relay bases (RIF-2 series) | Fast installation and secure fit |
| Standards Compliance | IEC 60664, IEC 61810 | Meets international safety and reliability standards |
Download Phoenix Contact REL-IR4/L-230AC/4X21AU (2903685) Datasheet
| Commercial Data | Details |
|---|---|
| GTIN Number | 4046356758987 |
| Customs Tariff Number | 85364900 |
| Weight (Excl. Packaging) | 31.85 g |
| Country of Origin | Poland (PL) |
In advanced diagnostic machines like CT or MRI scanners, even small fluctuations in signal quality can affect accuracy. The REL-IR4/L-230AC/4X21AU relay ensures dependable low-level signal switching with its gold-plated contacts, preventing oxidation that could cause data errors. Its fast response time allows precise synchronization with imaging sequences, while the built-in LED indicator makes it easy for service teams to confirm operation during routine checks. The result is smoother performance, reduced downtime, and improved reliability for critical healthcare equipment.
Production facilities for food and beverages require equipment that can withstand high cycle rates and strict hygiene protocols. The relay’s mechanical endurance of around 20 million operations allows it to handle continuous switching without failure. Its plug-in design supports quick replacement during maintenance, while the test button helps technicians validate functions rapidly during scheduled shutdowns. By providing durability and ease of servicing, it minimizes unplanned stoppages and keeps production running smoothly in an industry where efficiency and compliance are paramount.
Railway control cabinets are often exposed to vibrations, outdoor climates, and fluctuating loads. The REL-IR4/L-230AC/4X21AU performs reliably in these demanding settings due to its broad operating temperature range and sturdy insulation. Gold-plated contacts help maintain dependable switching despite mechanical stress and environmental exposure. Its compact, plug-in form simplifies replacement during field service, ensuring that signaling and safety systems remain consistently operational. This resilience supports long-term safety and reduces costly downtime in transport networks.
Heating, ventilation, and air-conditioning systems in smart buildings require flexible relays to handle complex control strategies. With four changeover contacts and low coil current consumption, this relay can easily integrate into building management systems, enabling precise switching between multiple control points. The yellow LED status display helps facilities personnel quickly verify operation without tools, speeding up diagnostics and reducing troubleshooting costs. By ensuring efficient control and simple maintenance, the relay contributes to energy savings and enhanced comfort in modern automated buildings.
| Category | Model Name | Part Number | Benefit |
|---|---|---|---|
| Relay Base (Push-in Connection) | RIF-2-BPT/4X21 | 2900934 | Provides secure push-in wiring connection for the REL-IR4 series; supports interference suppression modules; ideal for fast installation on NS 35/7.5 rails. |
| Relay Base (Screw Connection) | RIF-2-BSC/4X21 | 2900932 | Screw terminal version of the relay base; offers reliable wiring and long-term stability in industrial environments. |
| Alternative Single Relay (Different Coil Voltage) | REL-IR4/L-24DC/4X21 | 2903340 | Offers the same contact configuration with 24 V DC coil voltage, suitable for systems using low-voltage DC control signals. |
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Warranty – 1-year warranty for your peace of mind.
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