This is a 12V DC/DC regulator, specifically a Murata OKI-78SR-12/1.0-W36-C! They're highly efficient ~95%, and provide 12V @ 1A (12W) from a 15V to 36V input. It's ideal if you need to produce 12V from a higher voltage power source for your project, and unlike noisy UBECs, this regulator provides < 75 mV peak-to-peak ripple. We also stock similar 5V and 3.3V regulators. Features * 15 - 36V Input * 12V @ 1A Output (12W) * < 75 mV peak-to-peak ripple * Vertical mount, small footprint package * “No heat sink” direct replacement for 3-terminal 78xx-series linear regulators * High efficiency (~95%) with no external components * Short circuit protection * Outstanding thermal derating performance * UL/EN/IEC 60950-1, 2nd Edition safety approvals Resources Download the datasheet here https://elecena.pl/product/22719210/12v-dc-dc-regulator-discontinued 2023-03-07 https://elecena.pl/product/22719210/12v-dc-dc-regulator-discontinued 2024-09-19