MRZI75 Series

Features

Industrial Standard Quarter Brick Package
Ultra-wide Input Range 36-160VDC
Excellent Efficiency up to 91%
I/O Isolation 2000VAC with Reinforced Insulation
Operating Baseplate Temp. Range -40℃ to +105℃
Passed Temperature Cycle Test (TCT) more than 1000 Cycles
No Min. Load Requirement
Under-voltage, Overload/Voltage/Temp. and Short Circuit Protection
Remote On/Off Control, Output Voltage Trim, Output Sense
Vibration and Shock/Bump Test EN 61373 Approved
Cooling, Dry & Damp Heat Test IEC/EN 60068-2-1, 2, 30 Approved
Railway EMC Standard EN 50121-3-2 Approved
Railway Certified EN 50155 (IEC60571) Approved
Fire Protection Test EN 45545-2 Approved
UL/cUL/IEC/EN 62368-1 Safety Approval & CE Marking

OVERVIEW

The MINMAX MRZI75 series is a new generation of high-performance 75W isolated DC-DC converters in a quarter-brick package, specifically designed for railway applications. It features a wide input range of 36-160 VDC and offers stable output voltage options of 5, 12, 15, 24, and 54 VDC (suitable for PoE applications), providing a range of choices for various railway needs. With its advanced circuit topology, the MRZI75 series delivers an impressive efficiency of up to 91%, enabling baseplate temperatures to reach up to 105°C.
The series also provides high I/O isolation of up to 2000VAC with reinforced insulation, designed to endure harsh environmental conditions. Key features include protection against under-voltage, overload, over-voltage, over-temperature, and short circuits. It also supports remote On/Off control (with both positive and negative logic), output voltage trimming, and output sensing for precise power regulation. Notably, the MRZI75 series has passed the Temperature Cycle Test (TCT) with over 1000 cycles, ensuring enhanced reliability in extreme operating conditions.
The MRZI75 series is certified to the railway standard EN 50155 and the EMC standard EN 50121-3-2, meeting stringent safety and environmental requirements for railway use. Additionally, it complies with the EN 45545-2 fire protection standard, ensuring safety during railway and railroad vehicle operations. This series is ideal for a variety of railway applications, such as traction control systems, onboard lighting, communication systems, surveillance equipment, and HVAC systems, providing reliable power conversion in demanding environments.

Specifications

Output Voltage Accuracy		±1.0% max.
Line Regulation		±0.2% max.
Load Regulation		±0.3% max.
Ripple & Noise (20MHz)	5V, 12V, 15V	100mVp-p Max.
	24V	150mVp-p Max.
	54V	300mVp-p Max.
Efficiency		Up to 90%
I/O Isolation Voltage		2000VAC min. (Reinforced Insulation)
Baseplate Temperature Range		-40°C to +105°C (See Derating Curve)
I/O Isolation Capacitance		2200pF typ.
Short Circuit Protection		Continuous (Auto. Recovery)
Output Voltage Trim	Other Models	±10% max.
	54V Output	+5/-15% max.
Remote ON/OFF		Enable High
Case Material		Plastic resin (flammability to UL 94V-0 rated)
Railway & Safety Approval		UL/cUL/IEC/EN 62368-1, CB-Report, EN50155 (IEC60571) & CE Marking