When the job calls for a circuit-board-mounting PSU with rock-solid isolation, pick this DC-DC converter from Traco Power. It takes a voltage ranging between 10.8 and 13.2V DC and transforms it to provide a stable load of 12V DC for charging kit that runs on batteries. Thanks to its compact, industry-standard SMD8 footprint of 13.7 (L) x 8.4 (W) x 7.2mm (D), it's a piece of cake to fit directly on your PCB. Isolation to 1.5kV DC on both the input and output means this product also shields you and your equipment from harmful voltage surges.

• 79% efficient, so little energy's wasted as heat and there's no need for a fan or heatsink to keep it cool
• Operates safely in temperatures from -40°C to +90°C
• Mean time between failures of 2 million hours, so you know it's a long-lasting pick

• Renewable energy
• Smart lighting
• Industrial process control

In addition to the unit's high isolation rating, you can expect its short-circuit breaking to prevent current faults from causing injury or device damage. This converter uses non-conductive housing materials for its case and baseplate, so you can also be sure it's shockproof.