MDR-40-24 Ultra-Slim 40W 24V DIN-Rail Switching Power Supply

Architectural Overview
The MDR-40-24 is a compact, high-efficiency industrial switched-mode power supply engineered for precision automation and low-profile cabinet deployments. Operating across a universal full-range input of 85–264VAC (or 120–370VDC) at 47–63Hz, it delivers a regulated 24VDC output at 1.7A with an ultra-low no-load power consumption of under 0.75W to 1W. Designed with built-in active Power Factor Correction (PFC) circuitry and an integrated DC OK relay contact, this module delivers greater than 88% typical efficiency and tight voltage stabilization (±1% accuracy) essential for sensitive industrial electronics.

Material & Mechanical Design
Encased in a slim, fully isolated environmental plastic chassis measuring only 40mm across, the MDR-40-24 maximizes DIN-rail space within tightly packed electrical enclosures. The durable exterior housing facilitates optimized passive convective airflow without requiring internal fans, preventing dust ingress while sustaining dependable heat dissipation. The unit features heavy-duty terminal blocks for secure field wiring and an integrated snap-on mounting clip engineered for immediate assembly on standard industrial rails.

Operational Endurance & Protection
Engineered to meet rigorous Class I, Div 2 Hazardous Locations T4 certification, the MDR-40-24 offers safe and dependable operation in volatile industrial environments. Internal protection includes constant hiccup-mode overload recovery (activated between 105% and 150% rated load), latch-off overvoltage protection above 135%, and full short-circuit defenses. With high electrical isolation ratings of 3kVAC input-to-output and operating thermal resilience from -20°C to +70°C, the supply maintains operational integrity under severe electrical surges and ambient extremes.

Compatibility & System Integration
The MDR-40-24 mounts natively to standard TS-35/7.5 and TS-35/15 symmetrical DIN rails, ensuring seamless mechanical compatibility with industrial distribution panels and PLC control racks. The built-in DC OK relay contact enables immediate telemetry interface with PLCs, remote RTUs, and alarm circuits to trigger automated shutdown or failover procedures. It is perfectly matched for distributed I/O systems, building automation, process instrumentation, and smart factory edge networks.