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Advanced Railway Technology

MINMAX supplies isolated DC-DC and AC-DC power converters across industries such as railway, renewable, and healthcare applications.


Email Address
No. 77, Sec. 1,
Zhonghua W. Road,
South District,
Tainan City 702,


MINMAX Technology is a renowned company with over 30 years of expertise in delivering high-quality isolated DC-DC and AC-DC power converters. As a trusted industry leader, MINMAX has established a strong reputation for its reliable and efficient power solutions across various applications.

Railway-certified isolated DC-DC power solutions

The MINMAX Railway Certified DC–DC Converter family, with power capacities ranging from 3W to 150W, is designed to meet stringent requirements and adverse environmental testing. All series pass more than 300 cycles of thermal cycling testing.

Compact size 3W isolated DC-DC converter for Railway Certification-MIZI03 Series.
Ultra-wide operating ambient Temp. range 10W DC-DC Converter – MKZI10 Series.
Railway Certified EN 50155 approved 20W DC-DC Converter – MKZI20 Series.
40W DC-DC converter with reinforced insulation 3000VAC-MKZI40 Series.
Reinforced insulation 75W DC-DC converter – MRZI75 Series.
Excellent efficiency 100W DC-DC converter - MRZI100 Series.
Professional 150W DC-DC converter for high efficiency- MRZI150 Series.

The company’s solutions are specifically designed to be the primary insulation barriers for railway DC power architecture. All converters are also equipped with standard DIP, 2”x1”, and quarter brick packaging. MINMAX converters are highly reliable and ideal for use in railway applications such as backup power systems, train operation monitors, gate controllers, and traction inverters.

DC-DC power converters for railway applications

MINMAX’s certified DC-DC converters are available for various DC battery bus voltages and feature tight regulation for a range of output voltages. In accordance with EN 50155:2017 certification requirements, the railway certified DC-DC converters conform to railway DC input-voltage ranges and transient/variation requirements, including the voltage isolation, test vibration, and shock/bump requirements in EN 61373.

An advanced circuit topology provides a very high efficiency of up to 93%, which allows a base plate temperature of up to 105°C and a very high I/O isolation of up to 3,000V AC, with reinforced insulation. Further features include overload, overvoltage, and short-circuit protection, as well as remote on/off controls, output trim, and output sense. For fire protection testing, the converters meet EN 45545-2 standards to ensure system safety.

High-performance power conversion solutions

MINMAX provides fast turnaround times and high quality, along with efficient service and technical support. The company also prides itself on supplying customers with products and effective service in a timely manner. Adhering to the best quality standards has also helped MINMAX to become a preferred business partner in the rail industry.

The company also works hard to reduce any negative environmental impacts. Its products comply with the REACH Directive and the European Restriction of Hazardous Substances (RoHS) Directive to help protect the environment. The company also has a strong and well-established relationship with its material suppliers, which helps to ensure that the company has a stable supply of materials.

As a business, MINMAX aims to provide products of superior quality and deliver efficient service and technical support to meet all customer requirements.

Power converters for renewable energy systems and industrial and medical applications

MINMAX specialises in a wide range of power converters, including:

  • General industrial DC-DC power converters: 1w-60w for through-hole, surface, chassis, and DIN-rail mounting assembly
  • Switch regulators: 0.5A-1A
  • Medical certified DC-DC power converters: 1W-20W for through-hole and surface mounting assembly
  • Ultra-high isolation DC-DC power converters: 1W-60W for through-hole, surface, chassis, and DIN-rail mounting assembly

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No. 77, Sec. 1
Zhonghua W. Road
South District
Tainan City 702

Email address