KA78M12RTM

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The KA78M12RTM is a discontinued three-terminal positive voltage regulator from onsemi, belonging to the MC78Mxx series. It provides a fixed 12V output with a maximum continuous current of 500mA. The device supports an input voltage range up to 35V and features internal thermal overload and short-circuit protection. It is housed in a surface-mount SOT-223 package (DPAK variant) and operates within a temperature range of -40°C to 125°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Fixed 12V output regulation for stable power supply applications
• Integrated thermal shutdown and short-circuit current limiting for robust operation
• Surface-mount DPAK packaging for compact circuit board integration

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• General-purpose linear power supplies requiring 12V regulation
• Battery-powered equipment needing efficient voltage step-down
• Embedded systems and microcontroller power conditioning

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

This component is officially obsolete and no longer manufactured by onsemi. Verification of availability must rely on third-party distributors or surplus markets. Buyers should confirm the authenticity of stock and check for RoHS compliance status, as original production may predate modern environmental standards. Cross-referencing with active replacement parts is recommended for new designs.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this part only for legacy system maintenance or repair where pin compatibility is critical. For new designs, consider active equivalents such as the L78M12CDT-TR or UA78M12CKVURG3 which offer similar electrical characteristics and current availability. Ensure the chosen replacement matches the required thermal performance and package dimensions for direct substitution.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The KA78M12RTM is part of the broader MC78Mxx family of low-current linear regulators. This series is designed to provide reliable fixed voltage outputs for applications drawing up to 500mA. The 'KA' prefix typically denotes specific manufacturing origins or revisions within the onsemi portfolio, while the 'RTM' suffix indicates the specific surface-mount tape-and-reel packaging configuration.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Verified substitutes include BA78M12FP-E2 (Rohm), L78M12ABDT-TR (STMicroelectronics), L78M12CDT-TR (STMicroelectronics), and UA78M12CKVURG3 (Texas Instruments). These alternatives maintain the 12V/500mA specification and are currently available.