Dual line programmable transient voltage suppressor for SLIC protection

This device has been especially designed to protect 2 new high voltage, as well as classical SLICs, against transient overvoltages.

Positive overvoltages are clamped by 2 diodes. Negative surges are suppressed by 2 thyristors, their breakdown voltage being referenced to -VBAT through the gate. Separated gates allow the SLICs to be supplied by two different voltages.

Key Features

  • Dual line programmable transient voltage suppressor with separated gates
  • Wide negative firing voltage range: VGn = -175 V max.
  • Low dynamic switching voltages: VFP and VDGL
  • Low gate triggering current: IGT = 5 mA max
  • Peak pulse current: IPP = 40 A (5/310 μs)
  • Holding current: IH = 150 mA min.


Publications and Collaterals

Description Version Size
ST Protection Finder - The new app for Android and iOS 1.0 1 MB

HW Model & CAD Libraries

HW Model & CAD Libraries
Description Version Size
LCDP1521S PSpice model (.lib) and symbols (.olb) 1.0 3 KB

Technical Documentation

Product Specifications
Description Version Size
DS6477 DS6477: Dual line programmable transient voltage suppressor for SLIC protection 7.0 601 KB
Technical Notes & Articles
Description Version Size
TN1173 TN1173: Packing information for IPAD™, protection, rectifiers, thyristors and AC Switches 5.0 1 MB

Tools and Software

Design Tools
Smart selectors
Support & Community

Sample & Buy

Part Number Marketing Status Stand-off voltage (V) (nom) Directionality Package Packing Type Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
LCDP1521SRL Active - Uni-Directional SO-8 Tape And Reel 0.428 100 NEC EAR99 CHINA MORE INFO DISTRIBUTOR AVAILABILITY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LCDP1521SRL ActiveSO-8IndustrialEcopack2 0 0

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.