Traco Power Rugged DC/DC Converters for Railway Applications

Full performance under the harshest environmental conditions – reliable against shock, vibration and airborne particles.

Ruggedized Traco Power DC/DC Converters for Railway and Industrial Applications

Traco Power offers DC/DC converters that meet the stringent requirements for mobile and stationary railway applications in accordance with EN 50155 and EN 61373. With ultra-wide input ranges and ruggedised construction, these solutions deliver reliable performance even in the harshest environments. Available through RS, Traco Power’s railway-grade converters provide safe and dependable power conversion for demanding railway and industrial applications.

ULTRA-Wide Input Railway & Ruggedized DC/DC converters

Watch this video to get a quick overview of Traco Power’s ultra-wide input DC/DC converter families for railway and demanding industrial environments. These compact, robust converters offer wide input ranges (4:1 and 12:1) and are designed to meet EN 50155 and EN 61373 requirements. As an RS distributor, we provide access to these reliable and application-ready power solutions for modern railway systems.

EN 50155 Input Voltage Requirements

EN 50155 defines the electrical, environmental and mechanical requirements for electronic equipment used on rolling stock. The table below summarises the minimum input voltage ranges for DC/DC converters in railway applications.

Bus Voltage	Continuous input voltage range	Brownout 100 ms	Transient 1 sec	Recommended input voltage ranges
24 VDC	16.8 – 30.0 V	14.4 V	33.6 V	9-36 VDC (4:1 wide) or 14-160 vdc (12:1 ultra-wide)
37.5 VDC	26.2 – 47.0 V	22.5 V	52.5 V	18-75 VDC (4:1 wide) or 14-160 vdc (12:1 ultra-wide)
48 VDC	33.6 – 60.0 V	28.8 V	67.2 V	18-75 VDC (4:1 wide) or 14-160 vdc (12:1 ultra-wide)
72 VDC	50.4 – 90.0 V	43.2 V	100.8 V	43-160 VDC (4:1 wide) or 14-160 vdc (12:1 ultra-wide)
96 VDC	67.2 V – 120.0 V	57.6 V	134.4 V	43-160 VDC (4:1 wide) or 14-160 vdc (12:1 ultra-wide)
110 VDC	77.0 – 137.5 V	66.0 V	154.0 V	43-160 VDC (4:1 wide) or 14-160 vdc (12:1 ultra-wide)

EN 50155 sets the following additional requirements:

Galvanic isolation to protect electronic circuits
Limits on emission and susceptibility with respect to conducted and radiated electromagnetic interference
Safe operation at relative humidity levels up to 95% for 30 consecutive days

EN 61373 – Shock and Vibration Requirements

EN 61373 certification guarantees reliable operation under severe mechanical stresses commonly encountered in railway environments. Traco Power railway-grade converters are tested for:

Random vibration in the frequency range of 5–150 Hz @ 5 gRMS (5 hours per axis)
Mechanical shock with peak acceleration levels of 5 g / 2 g / 1 g (duration: 50 ms / 20 ms / 20 ms)

In addition to meeting EN 61373, all Traco Power railway solutions offer the highest reliability in harsh conditions. Their 4:1 wide and 12:1 ultra-wide input voltage ranges go beyond the requirements of EN 50155, enabling stable operation across –40°C to +85°C ambient temperatures. Higher temperatures are supported with favourable derating characteristics.

Railway Power Converter Families

The graphic illustrates Traco Power’s DC/DC converter families for railway applications, featuring ultra-wide input ranges and multiple package sizes. These converters are designed to comply with key railway standards and operate reliably in harsh environments.

High-Reliability Power Solutions for Harsh Railway Environments

Traco Power railway converters are designed to deliver long-term reliability in harsh operating conditions. Key features include:

Ultra-wide input voltage ranges (4:1 and 12:1) that exceed EN 50155 requirements
Continuous operation from –40°C to +85°C, with higher temperatures supported through favourable derating
Fully encapsulated PCB-mounted designs for protection against moisture and airborne particles
Increased EMC immunity against surge, burst, radiated and conducted disturbances
Internal EMI filtering on selected models to reduce electromagnetic interference
Certified safety compliance with IEC/EN/UL 62368-1
Fire protection qualification according to EN 45545-2
ISO 9001 manufacturing processes ensuring consistent, long-term performance
Suitable for harsh-environment applications, including railway and industrial systems