Industrial Automation
Delta
Enclosures
nVent Hoffman
BCH
Industrial Components
Phoenix Contact
Switchgears
Electrical Product
REL-IR-BL/L-12DC/4X21 from Phoenix Contact is a compact, efficient, and highly reliable safety relay module that significantly enhances both safety and functionality in modern automation systems. Since it is equipped with 4 changeover (4PDT) contacts and a 12V DC coil, this module ensures precise, stable, and consistent switching, especially in safety-critical operations.
What truly sets this glass relay apart is its transparent housing, which allows for instant visual inspection of the contact status. Additionally, it features a built-in LED indicator to display real-time coil activation, along with a mechanical position indicator that further simplifies diagnostics. As a result, routine maintenance becomes faster and more efficient.
Moreover, this plug-in industrial relay supports quick installation and easy replacement, which makes it ideal for fast-paced industrial environments where minimizing downtime is crucial. Furthermore, its seamless compatibility with standard industrial sockets, PLCs, and interface modules makes it extremely versatile for a wide range of automation applications, particularly in control panel relay configurations.
Key Features
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Model: REL-IR-BL/L-12DC/4X21
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Relay Type: Safety relay module
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Contacts: 4 changeover contacts (4PDT) for flexible switching
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Coil Voltage: 12V DC
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Housing: Transparent glass relay enclosure for easy visual diagnostics
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Indicators: Built-in LED for coil status, plus mechanical position indicator
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Diagnostics: Test button included for manual relay testing and routine maintenance
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Design: Plug-in relay for fast installation and replacement
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Applications: Ideal for control panels, PLCs, and interface modules in automation
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Standards Compliance: EN 61810-1, RT II, 2.5 kVrms dielectric strength
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Operating Temperature: -40°C to +70°C
Technical Specifications of REL-IR-BL/L-12DC/4X21 :
| Specification | Details |
|---|---|
| Brand | Phoenix Contact |
| Model | REL-IR-BL/L-12DC/4X21 |
| Coil Voltage | 12 V DC |
| Contact Type | 4 changeover contacts (4PDT) |
| Contact Material | Silver Nickel (AgNi) |
| Rated Switching Voltage | Up to 250 V AC/DC |
| Rated Current | 12 A |
| Maximum Inrush Current | 24 A (20 ms, N/O contacts) |
| Minimum Switching Current | 10 mA (12 V) |
| Switching Capacity | Minimum 120 mW |
| Interrupting Rating (Ohmic Load) | 288 W (24 V DC), 130 W (48 V DC), 90 W (60 V DC), 66 W (110 V DC), 88 W (220 V DC), 3000 VA (250 V AC) |
| Indicators | LED, test button, mechanical position display |
| Relay Design | Plug-in, transparent glass enclosure |
| Dimensions (W×H×D) | 22.5 mm × 28 mm × 35.5 mm |
| Operating Temperature | -40°C to +70°C |
| Mounting | Compatible with industrial plug-in sockets |
| Certifications | EN 61810-1, RT II compliance |
Conclusion
Altogether, the REL-IR-BL/L-12DC/4X21 offers reliable switching, easy diagnostics, and seamless integration—making it an ideal solution for today’s industrial control applications.
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