Overview
The SM4T18CAY is a Transient Voltage Suppressor (TVS) diode manufactured by STMicroelectronics. It is part of the SM4TY series, designed to protect sensitive automotive circuits against electrical surges and electrostatic discharges. This device is AEC-Q101 qualified, ensuring it meets the stringent requirements for automotive applications. The SM4T18CAY features a peak pulse power dissipation of up to 2.3 kW (8/20 µs) and is packaged in a DO-214AC (SMA) footprint, making it suitable for high-end automotive electronics where reliability and stability are crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Pulse Power Dissipation (10/1000 µs) | 400 W | |
| Peak Pulse Power Dissipation (8/20 µs) | 2.3 kW | |
| Stand-off Voltage | 15 V | V |
| Clamping Voltage (VCL) at 25°C | 17.6 V | V |
| Peak Pulse Current (IPP) at 8/20 µs | 71 A | A |
| Leakage Current at 25°C | 0.2 µA | µA |
| Operating Junction Temperature Range | -55 to +150 °C | °C |
| Maximum Lead Temperature for Soldering | 260 °C | °C |
| Package Type | DO-214AC (SMA) |
Key Features
- AEC-Q101 Qualified: Meets automotive industry standards for reliability and performance.
- High Peak Pulse Power Dissipation: Up to 2.3 kW (8/20 µs) to protect against severe electrical surges.
- Low Leakage Current: 0.2 µA at 25°C, ensuring minimal current draw in standby conditions.
- High Junction Temperature: Operating range of -55 to +150 °C, suitable for harsh automotive environments.
- Compliance with Standards: Meets ISO 10605 and ISO 7637-2 standards for electrostatic discharges and automotive surges.
- Planar Technology: Ensures long-term reliability and stability in high-end circuits.
- ECOPACK Packaging: Environmentally friendly packaging that meets various environmental compliance levels.
Applications
The SM4T18CAY is designed for use in automotive electronics to protect sensitive circuits from electrical surges and electrostatic discharges. It is particularly suitable for applications such as:
- Automotive control units and sensors.
- Infotainment and navigation systems.
- Powertrain and engine control systems.
- Advanced driver-assistance systems (ADAS).
- Other automotive electronic systems requiring high reliability and surge protection.
Q & A
- What is the peak pulse power dissipation of the SM4T18CAY?
The peak pulse power dissipation is up to 2.3 kW (8/20 µs) and 400 W (10/1000 µs).
- What is the stand-off voltage of the SM4T18CAY?
The stand-off voltage is 15 V.
- What is the clamping voltage (VCL) at 25°C for the SM4T18CAY?
The clamping voltage (VCL) at 25°C is 17.6 V.
- What is the maximum peak pulse current (IPP) for the SM4T18CAY?
The maximum peak pulse current (IPP) at 8/20 µs is 71 A.
- What is the leakage current at 25°C for the SM4T18CAY?
The leakage current at 25°C is 0.2 µA.
- What is the operating junction temperature range for the SM4T18CAY?
The operating junction temperature range is -55 to +150 °C.
- What package type is the SM4T18CAY available in?
The SM4T18CAY is packaged in a DO-214AC (SMA) footprint.
- Is the SM4T18CAY AEC-Q101 qualified?
Yes, the SM4T18CAY is AEC-Q101 qualified.
- What standards does the SM4T18CAY comply with?
The SM4T18CAY complies with ISO 10605 and ISO 7637-2 standards.
- What are the typical applications for the SM4T18CAY?
The SM4T18CAY is typically used in automotive electronics such as control units, infotainment systems, powertrain systems, and ADAS.
