Phoenix Contact REL-MR-BL/48 DC/21-21 (Item 1109544) – Plug-in Miniature Power Relay, 48 V DC Coil, 2 Change-over Contacts

Detailed Description:
The Phoenix Contact REL-MR-BL/48 DC/21-21 (item number 1109544) is a compact, plug-in miniature power relay designed for industrial control applications. With a nominal coil voltage of 48 V DC and two change-over (DPDT) contacts, it provides reliable switching for control systems, automation panels and other electromechanical tasks. This relay belongs to the “Essential Edition” series offering industrial-grade performance in a space-saving footprint. 

Key Features:

• Nominal coil voltage: 48 V DC; input voltage range: 33.6 V DC to 108 V DC. 

• Two change-over contacts (DPDT), contact material AgNi. 

• Limiting continuous current 8 A; inrush capability 12 A (20 ms). 

• Maximum switching voltage: 250 V AC/DC; minimum switching voltage: 5 V (at 10 mA). 

• Mechanical service life: 3 × 10⁷ cycles; ambient temperature range: -40 °C to +85 °C. 

• Compact dimensions: width 12.7 mm, height 29 mm, depth 15.7 mm; color white (RAL 9010). 

• Plug / solder connection method. 

Applications & Use Cases:
This relay is suited for industrial control cabinets, automation equipment, signal switching, control logic interfaces and other systems where a compact, reliable DPDT relay with 48 V DC coil is required. Its plug-in format simplifies replacement and maintenance in modular setups.

Why Choose This Model:

• 48 V DC coil makes it ideal for DC control systems commonly used in industrial automation.

• Rated for 8 A continuous and up to 12 A inrush supports moderately heavy switching loads.

• Compact size enables high density installation in control panels.

• Built to Phoenix Contact industrial standards with wide ambient temperature range and long service life.