KA78R12CTSTU

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

The KA78R12CTSTU is a fixed positive low-dropout linear voltage regulator manufactured by onsemi. It provides a stable 12 V output with a maximum continuous current of 1 A. The device features a maximum dropout voltage of 500 mV and operates within an input voltage range up to 35 V. It is housed in a TO-220F-4 (TO-220-4) surface-mount package designed for through-hole mounting compatibility. The regulator includes internal thermal overload protection and short-circuit current limiting. It supports a power dissipation of 15 W and functions reliably across an operating temperature range from -20 °C to +80 °C.

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

• Fixed 12 V output regulation with 1 A current capability
• Low dropout performance with maximum 500 mV voltage drop
• Integrated thermal overload and short-circuit protection
• Surface-mount TO-220F-4 package design

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

• General-purpose power supply regulation
• Battery-powered equipment voltage stabilization
• Embedded system power management

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

Verify the specific suffix 'STU' against official onsemi documentation to confirm the TO-220F-4 surface-mount package variant, as standard 'TU' versions may differ in physical form factor. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as regulatory data requires explicit verification. Ensure the component matches the required thermal management specifications for the intended application environment.

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

Select this component when a fixed 12 V output is required with high current capacity in a robust package. The TO-220F-4 form factor allows for efficient heat dissipation compared to smaller packages. Consider the 500 mV dropout characteristic relative to the minimum input voltage available in the circuit design. Verify that the 15 W power dissipation rating aligns with the expected thermal conditions and heatsinking capabilities of the final assembly.

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

This part belongs to the KA78R12C series of low-dropout regulators from onsemi. It is functionally related to other variants such as KA78R09CTU and KA78R05CTU, which share similar electrical characteristics but provide different fixed output voltages. The series is categorized under PMIC - Power Management ICs, specifically LDO Voltage Regulators, designed for reliable linear regulation in industrial and consumer electronics.

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

Publicly confirmed substitute part numbers are not available in the provided source material. Cross-reference with KA78R12CTU only if package compatibility is verified, though suffix differences indicate potential physical variations.