Phoenix Contact REL-MR-BL-12DC/21HC – Single Plug-In Relay, 1 CO Contact, 12 V DC Coil, Heavy Duty (Part No. 1109537)

Product Overview:

The Phoenix Contact REL-MR-BL-12DC/21HC is a high-quality single-channel plug-in relay featuring a 12 V DC coil and 1 changeover contact (SPDT) for switching heavy-duty loads. Built for robust and reliable performance, the relay includes enhanced contact durability and high switching capacity, making it ideal for industrial control systems, automation panels, and machine applications.

It is color-coded blue for DC voltage coils and supports fast diagnostics and safe replacement, especially in dense relay racks or modular terminal blocks.

Key Features:

• ✅ Single Relay with 1 Changeover Contact (SPDT) – Reliable switching for both control and power circuits.

• ✅ 12 V DC Coil Voltage – Suitable for logic-level control and PLC outputs.

• ✅ Heavy-Duty Switching (HC) – Optimized for inductive and resistive loads.

• ✅ Color Coded (Blue) – For fast identification of DC coil relays in the field.

• ✅ Compact Plug-In Design – Fits into standard Phoenix Contact relay bases.

• ✅ Industrial-Grade Reliability – Designed for extended switching cycles and robust field use.

Technical Specifications

Applications:

• PLC output interfacing

• Signal switching in automation cabinets

• Machine control systems

• HVAC and process control panels

• Heavy inductive/resistive load switching