Railway DC-DC power converters and filters

Isolated DC-DC converters for the rail transit industry

The RailQor® converter series, featuring the next-generation, panel-mounted, isolated, fixed-frequency DC-DC with synchronous rectification, achieves extremely high power conversion efficiency even at low output power levels. The quarter-inch 25-50 W Mega series has very low power consumption, so it can operate at 85°C without a heatsink in an enclosed environment without airflow. Each module is fully encapsulated to provide protection and shield it from the harsh environments that often occur in industrial and transportation applications. 

General Specifications

Operating Temperature: -40°C to +100°C 

Output voltage setting value ±1.0% 

Output voltage ripple < 1% (typical value) of pk-pk 

Switching frequency: 240 - 350 kHz 

Output voltage adjustment range: +10% to -20% / +10% to -50% (applicable only to HZ) 

The isolation voltage can reach up to 3000 Vdc. 

Compliant with EN5015 

The RIA 12 complies with the pin configuration and standard packaging of the external circuit industry standards. 

Protection/Control Function

Input Under-Voltage Lockout 

Output current limit and short circuit protection 

Active reverse bias limitation can prevent damage to the converter. 

Output overvoltage protection 

Thermal shutdown 

Operating features

The efficiency reaches as high as 93% when fully loaded. 

The 25-50 W Mega series of quarter-inch bricks does not reduce power output in a zero airflow environment and at an ambient temperature of up to 85°C, without a heat sink. 

Input voltage range: 9 - 36 V, 18 - 45 V, 18 - 75 V, 42 - 110 V, 12 - 155 V, 34 - 160 V and 66 - 160 V 

The input voltage range complies with the requirements of EN 50155. 

The substrate temperature operates at full power within the range of -40°C to 100°C. 

The output power can reach up to 500 W. 

Fixed-frequency switch, low output noise 

No minimum load requirement 

The closed modules can provide protection in harsh environments and offer an optional flange-type base plate. 

Digital output current sharing (only for HZ)