When performance is key and safety's critical, plump for a DC-DC converter like this one from Traco Power. It steps down input voltages across a broad 9 to 36V DC range to deliver a steady 5V DC. This makes safely charging up to two of your battery-run devices a piece of cake. You can count on this product to keep you and your equipment from harm thanks to under-voltage lockout, overvoltage breaking and continuous short-circuit protections. Excellent EMC behaviour and resistance to vibration as well as thermal and mechanical shock mean it's a practical pick for demanding rail and transport tasks.

• Through-hole mounting lets you install securely to your PCB
• Compact dimensions of 31.8 (L) x 20.3 (W) x 10.2 mm (D) with 8W of juice make it a high-power-density option
• Remote on/off gives you a simple way of controlling from afar

• Wireless networks
• Telecommunications
• Control systems
• Measurement equipment

Thanks to its broad operating temperature range between -40°C and +85°C, you can rest assured this DC-DC converter is a safe bet for harsh industrial settings.