Overview
The SM4T28CAY is a high-performance Transient Voltage Suppressor (TVS) diode designed by STMicroelectronics for the protection of sensitive automotive circuits. This component is part of the SM4TY series, which is specifically engineered to withstand surges as defined in ISO 7637-2 and electrostatic discharges according to ISO 10605. The SM4T28CAY is AEC-Q101 qualified, ensuring its reliability and durability in harsh automotive environments.
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 | 24 | V |
| Leakage Current at 25 °C | 0.2 µA | µA |
| Leakage Current at 85 °C | 1 µA | µA |
| Operating Junction Temperature | -55 to +150 | °C |
| Maximum Lead Temperature for Soldering | 260 | °C |
| Electrostatic Discharge (ESD) Capability | 30 kV (air and contact discharge) | kV |
| Package Type | SMA | |
| Compliance Standards | ISO 7637-2, ISO 10605, AEC-Q101 |
Key Features
- High Surge Capability: The SM4T28CAY can handle peak pulse powers of up to 400 W (10/1000 μs) and 2.3 kW (8/20 μs), making it robust against transient voltages.
- Low Leakage Current: With a leakage current of 0.2 µA at 25 °C and 1 µA at 85 °C, this component minimizes power consumption in standby conditions.
- High Junction Temperature: The device operates reliably up to a junction temperature of 150 °C, ensuring stability in high-temperature environments.
- Compliance with Automotive Standards: AEC-Q101 qualified and compliant with ISO 7637-2 and ISO 10605 standards, making it suitable for automotive applications.
- Planar Technology: Utilizes planar technology for compatibility with high-end circuits, providing long-term reliability and stability.
Applications
The SM4T28CAY is designed for use in automotive electronics to protect sensitive circuits from transient voltages and electrostatic discharges. It is particularly useful in systems such as:
- Automotive control units
- Sensor systems
- Infotainment systems
- Power management circuits
Q & A
- What is the peak pulse power handling of the SM4T28CAY?
The SM4T28CAY can handle a peak pulse power of up to 400 W (10/1000 μs) and 2.3 kW (8/20 μs). - What are the operating temperature ranges for the SM4T28CAY?
The operating junction temperature range is -55 to +150 °C. - Is the SM4T28CAY compliant with automotive standards?
Yes, it is AEC-Q101 qualified and compliant with ISO 7637-2 and ISO 10605 standards. - What is the leakage current of the SM4T28CAY at 25 °C and 85 °C?
The leakage current is 0.2 µA at 25 °C and 1 µA at 85 °C. - What type of package does the SM4T28CAY come in?
The SM4T28CAY is packaged in an SMA footprint in accordance with IPC 7531 standard. - What is the maximum lead temperature for soldering the SM4T28CAY?
The maximum lead temperature for soldering is 260 °C. - Can the SM4T28CAY withstand electrostatic discharges?
Yes, it can withstand electrostatic discharges up to 30 kV (air and contact discharge) according to ISO 10605. - What technology does the SM4T28CAY use?
The SM4T28CAY utilizes planar technology for high reliability and stability. - What are some common applications of the SM4T28CAY?
It is commonly used in automotive control units, sensor systems, infotainment systems, and power management circuits. - Is the SM4T28CAY environmentally friendly?
Yes, it is available in ECOPACK packages that meet various levels of environmental compliance.
