SMBJ12 Datasheet PDF – 12V, 600W, TVS, Diode, Rectifier

Part Number: SMBJ12, SMBJ Series

Function: 12V, 600W, TVS, Diode, Rectifier

Package: DO-214AA Type

Manufacturer: Littelfuse, Inc


SMBJ12 datasheet



The SMBJ12 is 12V, 600W, TVS, Diode, Rectifier.

The SMBJ series is designed specifically to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events.

A Transient Voltage Suppressor (TVS) diode is a type of semiconductor device that is specifically designed to protect electronic circuits from voltage spikes, also known as transients. These transients can occur due to a variety of reasons such as switching events in the power supply, electrical noise, and electrostatic discharge (ESD).

TVS diodes are typically connected in parallel with the circuit that needs protection, and when a voltage spike occurs, the TVS diode conducts, thereby diverting the surge current away from the protected circuit. Once the voltage spike has subsided, the TVS diode returns to its non-conducting state, allowing normal circuit operation to resume.


  • Excellent clamping capability
  • Low incremental surge resistance
  • Typical IR less than 1µA above 12V
  • For surface mounted applications to optimize board space
  • Low profile package
  • Typical failure mode is short from over-specified voltage or current
  • Whisker test is conducted based on JEDEC JESD201A per its table 4a and 4c



TVS components are ideal for the protection of I/O Interfaces, VCC bus and other vulnerable circuits used in Telecom, Computer, Industrial and Consumer electronic applications.

Other data sheets are available within the file: SMBJ15, SMBJ30, SMBJ40


SMBJ12 Datasheet PDF Download

SMBJ12 pdf