The R-78CK3.3-0.5 from Recom Power is a Non-Isolated Buck DC-DC Converter that converts an input voltage of 5 - 40 V to an output voltage of 3.3 V. It delivers an output current of up to 0.5 A and has an efficiency of 91%. This converter is a compact and efficient solution that saves space and energy. It can operate at an ambient temperature of up to 100°C and does not require separate heatsinks. Its pin-out is compatible with the LM78xx positive LDO regulators, making it easy to integrate into existing designs. This IEC/EN62368-1-certified DC-DC converter features short circuit protection, thermal shutdown, and low ripple and noise, ensuring stable performance, and making it a versatile solution for a wide range of applications. It offers fixed output voltage, making it easy to use, and can also serve as a positive-to-negative converter for use in circuits that require a negative voltage source. This RoHS-compliant step-down converter is available in a PCB-mount package that measures 11.5 x 7.55 x 10.2 mm and is ideal for industrial automation, building and home automation, energy, test and measurement, and semifab applications.