Overview
The SM4T39CAY is a high-performance Transient Voltage Suppressor (TVS) designed by STMicroelectronics, specifically tailored for protecting sensitive automotive circuits against electrical surges and electrostatic discharges. This component is part of the SM4TxxAY and SM4TxxCAY series, which are AEC-Q101 qualified, ensuring reliability and compliance with stringent automotive standards. The SM4T39CAY is packaged in an SMA footprint, adhering to the IPC 7531 standard, and features Planar technology for low leakage current and high junction temperature capabilities.
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 (VRM) | 33 V | V |
| Breakdown Voltage (VBR) at 25°C | 36.7 - 40.5 V | V |
| Clamping Voltage (VCL) at 25°C | 53.3 V | V |
| Maximum Peak Pulse Current (IPP) | 7.5 A | A |
| Dynamic Resistance (RD) | 1.70 Ω | Ω |
| Leakage Current (IRM) at 25°C | 0.2 µA | µA |
| Operating Junction Temperature (Tj) | -55 to +150 °C | °C |
| Storage Temperature Range (Tstg) | -65 to +150 °C | °C |
| Maximum Lead Temperature for Soldering | 260 °C | °C |
Key Features
- AEC-Q101 Qualified: Ensures compliance with automotive reliability standards.
- High Peak Pulse Power: Capable of handling 400 W (10/1000 μs) and 2.3 kW (8/20 μs) peak pulse power.
- Low Leakage Current: As low as 0.2 µA at 25°C and 1 µA at 85°C.
- High Junction Temperature: Operates up to 150°C, ensuring long-term reliability and stability.
- Planar Technology: Enhances performance in high-end circuits.
- Compliance with Standards: Meets ISO 10605 and ISO 7637-2 standards for electrostatic discharges and automotive surges.
- ECOPACK Packaging: Environmentally compliant packaging options available.
Applications
- Automotive Electronics: Protects sensitive circuits in automotive systems against electrical surges and electrostatic discharges.
- High-Reliability Systems: Suitable for applications requiring high reliability and stability, such as in automotive control units, sensors, and communication systems.
- Industrial and Consumer Electronics: Can be used in various industrial and consumer electronic devices that require protection against transient voltages.
Q & A
- What is the peak pulse power handling of the SM4T39CAY?
The SM4T39CAY can handle 400 W (10/1000 μs) and 2.3 kW (8/20 μs) peak pulse power.
- What is the stand-off voltage (VRM) of the SM4T39CAY?
The stand-off voltage (VRM) of the SM4T39CAY is 33 V.
- What are the operating temperature ranges for the SM4T39CAY?
The operating junction temperature range is -55 to +150 °C, and the storage temperature range is -65 to +150 °C.
- Is the SM4T39CAY AEC-Q101 qualified?
- What type of packaging does the SM4T39CAY use?
The SM4T39CAY is packaged in an SMA footprint, adhering to the IPC 7531 standard.
- What is the leakage current of the SM4T39CAY at 25°C?
The leakage current (IRM) at 25°C is 0.2 µA.
- Does the SM4T39CAY comply with any specific standards for electrostatic discharges?
- What is the maximum lead temperature for soldering the SM4T39CAY?
The maximum lead temperature for soldering is 260 °C.
- What is the dynamic resistance (RD) of the SM4T39CAY?
The dynamic resistance (RD) is 1.70 Ω.
- What are some typical applications of the SM4T39CAY?
Typical applications include protecting sensitive circuits in automotive systems, high-reliability systems, and various industrial and consumer electronic devices.
