Overview
The SM4T18AY is a high-performance Transient Voltage Suppressor (TVS) designed by STMicroelectronics for protecting sensitive automotive circuits against electrical surges and electrostatic discharges. This component is part of the SM4TY series, which is AEC-Q101 qualified, ensuring it meets stringent automotive standards. The SM4T18AY is packaged in an SMA footprint, complying with the IPC 7531 standard, and is suitable for high-end automotive applications where reliability and stability are crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Pulse Power (10/1000 μs) | 400 | W |
| Peak Pulse Power (8/20 μs) | 2.3 kW | kW |
| Stand-off Voltage | 15 V | V |
| Leakage Current at 25 °C | 0.2 µA | µA |
| Leakage Current at 85 °C | 1 µA | µA |
| Operating Junction Temperature Range | -55 to +150 °C | °C |
| Maximum Lead Temperature for Soldering | 260 °C | °C |
| Electrostatic Discharge (ESD) Protection | 30 kV (air and contact discharge, ISO 10605) | kV |
| Surge Protection | Compliant with ISO 7637-2 | - |
| Package Type | SMA | - |
Key Features
- AEC-Q101 Qualified: Meets automotive industry standards for reliability and performance.
- High Surge Capability: Protects against surges defined in ISO 7637-2 and electrostatic discharges according to ISO 10605.
- Low Leakage Current: Ensures minimal current leakage at high temperatures, enhancing long-term reliability.
- High Junction Temperature: Operates up to 150 °C, suitable for demanding automotive environments.
- Planar Technology: Provides compatibility with high-end circuits requiring low leakage current and high junction temperature.
- ECOPACK Compliance: Available in environmentally compliant packages.
Applications
The SM4T18AY is designed for use in various automotive applications, including:
- Protection of sensitive electronic circuits in vehicles against electrical surges and ESD.
- Use in high-reliability automotive systems where stability and long-term performance are critical.
- Integration into automotive systems such as infotainment, navigation, and safety systems.
Q & A
- What is the peak pulse power rating of the SM4T18AY?
The peak pulse power rating is 400 W (10/1000 μs) and 2.3 kW (8/20 μs).
- What is the stand-off voltage of the SM4T18AY?
The stand-off voltage is 15 V.
- What are the operating temperature ranges for the SM4T18AY?
The operating junction temperature range is -55 to +150 °C.
- Is the SM4T18AY compliant with automotive industry standards?
Yes, it is AEC-Q101 qualified.
- What type of package does the SM4T18AY come in?
The SM4T18AY is packaged in an SMA footprint.
- What is the maximum lead temperature for soldering?
The maximum lead temperature for soldering is 260 °C.
- Does the SM4T18AY provide protection against electrostatic discharges?
Yes, it provides protection up to 30 kV (air and contact discharge) according to ISO 10605.
- Is the SM4T18AY suitable for high-end automotive circuits?
Yes, it is designed for high-end circuits requiring low leakage current and high junction temperature.
- What environmental compliance does the SM4T18AY meet?
The SM4T18AY is available in ECOPACK compliant packages.
- What are some typical applications for the SM4T18AY?
It is used for protecting sensitive electronic circuits in vehicles, high-reliability automotive systems, and various automotive electronic systems.
