SN7812B 12V TO 220F3 Terminal 1A Positive Voltage Regulator

Description
Marked "AUK SN7812B" on the package with AUK Corp's logo (with "D" and "E" markings visible next to the mounting holes, indicating "D" for Drain-style output pin and "E" possibly a package/lead reference), this is AUK Corp's (Kodenshi AUK Group) SN7812B, part of the industry-standard 78xx series of fixed positive linear voltage regulators. It's a 3-terminal 1A positive voltage regulator that outputs a fixed, regulated 12V DC from a higher unregulated DC input.

Like all 78xx-family regulators, it requires no external components for basic operation — just input voltage and ground connections yield a stable, regulated 12V output. It includes built-in current limiting and thermal (over-temperature) shutdown protection, making it a robust, drop-in solution for powering downstream circuitry that needs a clean, fixed 12V rail.

Key Specifications

• Type: 3-Terminal Fixed Positive Linear Voltage Regulator
• Manufacturer: AUK Corp (Kodenshi AUK Group)
• Package Marking: AUK / SN7812B
• Package: TO-220F, isolated, 3-pin (Input, Ground, Output), through-hole
• Output Voltage: 12V (fixed)
• Output Current: 1A (typical for this series; some variants rated up to 1.5A)
• Input Voltage Range: ~14.5V to 27–35V DC (typical for 78xx family)
• Protection: Built-in current limiting, thermal overload (over-temperature) shutdown

Common Applications

• General-purpose fixed 12V power supplies
• Regulated rails for op-amp circuits, audio amplifiers, and sensor interfaces
• Post-regulation stage after AC-DC rectification in linear power supplies
• Arcade, industrial, and consumer electronics repair/replacement (drop-in compatible with LM7812, MC7812, UA7812, and similar 78xx-family parts)

Package Includes

• 1 x AUK SN7812B 12V Voltage Regulator (TO-220F)