Murrelektronik – MST Single Phase Safety Transformer

Transformer

The Murrelektronik MST Single Phase Safety Transformer is a robust industrial safety transformer designed to step down high‑voltage AC mains power to a low‑voltage AC output for control circuits, safety devices, and automation systems. Built to provide galvanic isolation between the primary supply and secondary output, the MST series helps improve electrical safety and comply with machine and control‑panel standards in industrial environments.

This transformer supports a wide input voltage range and delivers a stable 24 V AC secondary output with rated power up to 250 VA (for model 86185), making it suitable for use in machinery, panel installations, and automation equipment requiring reliable low‑voltage power. It features key‑hole mounting and meets international safety standards including EN 61558‑1, EN 61558‑2‑6, and EN 62041 category 0.

For more info, download our full technical spec.

Specifications

Specification Value
Series MST Single Phase Safety Transformer
Part Number 86185
Input Voltage 208…550 V AC
Output Voltage 24 V AC
Output Rating 250 VA
Frequency 50…60 Hz
Isolation Test Voltage 4 kV (Primary–Secondary)
Standards EN 61558‑1, EN 61558‑2‑6, EN 62041 Cat 0
Mounting Key‑hole
Operating Temperature -20…+40 °C

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