7812A PDF Datasheet – 1A, 12V, Voltage Regulator – MC7812A

This post explains for the Regulator.

The Part Number is 7812A, MC7812A.

The function of this semiconductor is 12V, Voltage Regulator.

The package is TO-220, D2Pak Type

Manufacturer: ON Semiconductor

Preview images :7812A pdf pinout


7812A is 1A, 12V, Positive Voltage Regulator. A voltage regulator is an electronic device that is used to maintain a constant voltage level, regardless of changes in load or input voltage. This helps to ensure that the voltage supplied to a device remains within the acceptable range, even under varying conditions such as changes in temperature or load.

These voltage regulators are monolithic integrated circuits designed as fixed−voltage regulators for a wide variety of applications including local, on−card regulation. These regulators employ internal current limiting, thermal shutdown, and safe−area compensation. With adequate heatsinking they can deliver output currents in excess of 1.0 A. Although designed primarily as a fixed voltage regulator, these devices can be used with external components to obtain adjustable voltages and currents.

Block Diagram:

7812A datasheet regulator


• Output Current in Excess of 1.0 A

• No External Components Required

• Internal Thermal Overload Protection

• Internal Short Circuit Current Limiting

• Output Transistor Safe−Area Compensation

• Output Voltage Offered in 2% and 4% Tolerance

• NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes

• Pb−Free Packages are Available

7812A PDF Datasheet