Product overview
Description
The SM4TY series are designed to protect sensitive automotive circuits against surges defined in ISO 7637-2 and against electrostatic discharges according to ISO 10605.
The Planar technology makes it compatible with high-end circuits where low leakage current and high junction temperature are required to provide long term reliability and stability. SM4TY devices are packaged in SMA (SMA footprint in accordance with IPC 7531 standard).
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All features
- AEC-Q101 qualified
- Peak pulse power:
- 400 W (10/1000 μs)
- 2.3 kW (8/20 μs)
- Stand-off voltage range from 5 V to 70 V
- Unidirectional and bidirectional types
- Low leakage current:
- 0.2 µA at 25 °C
- 1 μA at 85 °C
- Operating Tj max: 150 °C
- JEDEC registered package outline
- Resin meets UL94, V0
EDA Symbols, Footprints and 3D Models
STMicroelectronics - SM4T21CAY
Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.
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Symbols
Footprints
3D models
All resources
| Resource title | Version | Latest update | Actions | Details | Download |
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SPICE models (4)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 2.1 | 09 Apr 2026 | 09 Apr 2026 | |||
| ZIP | 2.0 | 12 May 2025 | 12 May 2025 | |||
| ZIP | 2.0 | 14 May 2025 | 14 May 2025 | |||
| ZIP | 1.0 | 10 May 2021 | 10 May 2021 |
CAD Symbol & Footprint models (2)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 1.0 | 15 May 2020 | 15 May 2020 | |||
| ZIP | 1.0 | 25 Mar 2022 | 25 Mar 2022 |
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| SM4T21CAY | Active Product is in volume production. | SMA | Automotive | Ecopack2 | - | - | |
SM4T21CAY
Package:
SMAMaterial Declaration**:
(**) 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.
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Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | VRM (V) (max) | Operating Junction Temperature (°C) (min) | Operating Junction Temperature (°C) (max) | Directionality | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SM4T21CAY | | | distributors No availability of distributors reported, please contact our sales office |
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SM4T21CAY Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors