STMicroelectronics Supplier Page

Transil™ Protection Devices



Automotive-grade ESD protection devices suitable for various applications


STMicroelectronics realizes that more and more manufacturers use automotive-grade, high reliability devices for the protection function across all applications. The increased reliability helps improve the confidence level of the end user due to the fact that these products are tested and have passed the most stringent testing conditions.
Transil™ Protection Devices

  • ESDA25LY
  • SM15TY
  • SM6TY

ESDA25LY

The ESDA25LY is a dual monolithic voltage suppressor designed to protect components which are connected to data and transmission lines against ESD. It clamps the voltage just above the logic level supply for positive transients and to a diode drop below ground for negative transients. It can also work as a bi-directional suppressor by connecting only pin 1 and 2.

Digi-Key P/N Manufacturer P/N Description
497-10785-1-ND ESDA25LY TRANSIL ARRAY 300W 25V SOT-23-3 Datasheet
497-10785-2-ND
497-10785-6-ND

SM15TY

The SM15TY Transil™ series has been designed to protect sensitive automotive circuits against surges defined in ISO7637-2 and against ESD according to IEC 61000-4-2 and ISO10605.

The Planar technology makes it compatible with high-end circuits where low-leakage current and high-junction temperature are required to provide reliability and stability over time. SM15TY are packaged in SMC (SMC footprint in accordance with IPC 7531 standard).

Digi-Key P/N Manufacturer P/N Description
497-10786-1-ND SM15T18AY TRANSIL 1500W 18V UNIDIRECT SMC Datasheet
497-10787-1-ND SM15T18CAY TRANSIL 1500W 18V BIDIRECT SMC
497-10788-1-ND SM15T24AY TRANSIL 1500W 24V UNIDIRECT SMC
497-10789-1-ND SM15T27AY TRANSIL 1500W 27V UNIDIRECT SMC
497-10790-1-ND SM15T30AY TRANSIL 1500W 30V UNIDIRECT SMC
View more SM15TY products here
Available in Tape & Reel (-2-ND), Cut Tape (-1-ND), and custom Digi-Reel® (-6-ND)

SM6TY

The SM6TY Transil™ series has been designed to protect sensitive automotive circuits against surges defined in ISO 7637-2 and against ESD according to IEC 61000-4-2 and ISO 10605.

The planar technology makes this device compatible with high-end circuits where low-leakage current and high-junction temperature are required to provide reliability and stability over time. SM6TY are packaged in SMB (SMB footprint in accordance with IPC 7531 standard).

Digi-Key P/N Manufacturer P/N Description
497-10797-1-ND SM6T27AY TRANSIL 600W 27V UNIDIRECT SMB Datasheet
497-10798-1-ND SM6T27CAY TRANSIL 600W 27V BIDIRECT SMB
497-10800-1-ND SM6T30CAY TRANSIL 600W 30V BIDIRECT SMB
497-10801-1-ND SM6T33AY TRANSIL 600W 33V UNIDIRECT SMB
497-10802-1-ND SM6T33CAY TRANSIL 600W 33V BIDIRECT SMB
View more SM6TY products here
Available in Tape & Reel (-2-ND), Cut Tape (-1-ND), and custom Digi-Reel® (-6-ND)