MKZI20 Series
20W DC-DC Converters
  • Industrial Standard 2" × 1" Package
  • Ultra-wide Input Range 9-36VDC, 18-75VDC, 40-160VDC
  • I/O Isolation 3000VAC with Reinforced Insulation
  • Operating Ambient Temp. Range -40°C to +88.5°C
  • No Min. Load Requirement
  • Under-voltage, Overload/Voltage and Short Circuit Protection
  • Remote On/Off Control, Output Voltage Trim
  • Conducted EMI EN 55032/11 Class A Approved
  • 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(60950-1) Safety Approval& CE Marking

The MKZI20(P) series, launched by MINMAX, is a high-performance 20W isolated DC-DC converter designed specifically for railway applications. The MKZI20(P) series adopts a fully encapsulated 2"x1" package, offering 18 models suitable for various input voltage ranges, including 24(9-36)VDC, 48(18-75)VDC, and 72/110(40-160)VDC. Through outstanding circuit topology design, the MKZI20(P) series achieves highly precise output voltage, with a conversion efficiency of up to 88%. Its excellent overall thermal design enables the MKZI20(P) series to operate in a wide temperature range from -40℃ to +88℃, making it well-suited for extremely cold and hot harsh environments.

The MKZI20(P) series features multiple functions, including undervoltage, overcurrent, overvoltage, short-circuit protection, remote on/off, and output voltage adjustment, and it has obtained the A-level certification for conducted EMI per EN 55032/11. Additionally, the MKZI20(P) series has passed vibration and shock/bump tests EN 61373, cooling, dry, and damp heat tests IEC/EN 60068-2-1,2,30, complies with the railway EMC standard EN 50121-3-2, and has obtained railway certification EN 50155(IEC 60571) as well as fire protection testing EN 45545-2. The MKZI20(P) series features 3000VAC I/O isolation withstand voltage and a reinforced insulation system. Through international certifications and rigorous testing processes, we are confident that the MKZI20(P) series can meet the stringent requirements of railway equipment and serve as a safety barrier in your system.

Furthermore, if customers prioritize the durability of materials and the performance of devices under extreme environmental temperature variations, MINMAX offers the MKZI10P series to meet these requirements. All models in this series have successfully passed Temperature Cycling Testing (TCT), completing 500 cycles of high and low-temperature variations (-40°C to +125°C) under conditions of temperature change at 20℃ per minute. Additionally, they have also passed the Temperature Humidity Bias Test (THB), demonstrating outstanding tolerance for up to 1,000 hours under high-temperature and high-humidity conditions (temperature 85°C and humidity 85%). Throughout the testing process and upon completion, this series maintains stable and excellent electrical performance.

With a long-term durability guarantee, excellent electrical performance, and efficient heat dissipation, the MKZI20(P) series has been widely applied in various railway equipment such as door control systems, traction inverters, train automatic protection systems, safety monitoring systems, and brake control systems. The MKZI20(P) series is the optimal solution for ensuring the long-term stable operation of your equipment.

Output Voltage Accuracy ±1.0% max.
Line Regulation ±0.2% max.
Load Regulation Single ±0.5% max.
Dual ±1.0% max.
Ripple & Noise (20MHz) 5V  50mVp-p typ.
24V  150mVp-p typ.
others  100mVp-p typ.
Efficiency Up to 88%
I/O Isolation Voltage 3000VAC min.  (Reinforced Insulation)
I/O Isolation Capacitance 1500pF typ.
Operating Ambient Temp. Range -40°C to +88.5°C (See Derating Curve)
Short Circuit Protection Continuous (Auto. Recovery)
Output Voltage Trim ±10% max.
Remote ON/OFF Enable High
Case Material Metal (6 side shielded with insulated baseplate)
Railway & Safety Approval UL/cUL/IEC/EN 62368-1(60950-1), CB-Report, EN50155 (IEC60571) & CE Marking
Contact local distributor for quote

Comparison ECAD Model Number Output Power Input Voltage (VDC) Output Voltage (VDC) Output Current (mA) Efficiency Output Regulation I/O Isolation Package Type