Overview
The SM15T18AY from STMicroelectronics is a high-performance Transient Voltage Suppressor (TVS) designed to protect sensitive automotive circuits against surges and electrostatic discharges. This component is part of the SM15TxxAY series, which is AEC-Q101 qualified, ensuring it meets stringent automotive standards. The SM15T18AY is packaged in a Surface Mount (SMC) format, making it suitable for high-density PCB designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Pulse Power Dissipation (10/1000 µs) | 1500 | W |
| Peak Pulse Power Dissipation (8/20 µs) | 10,000 | W |
| Stand-off Voltage | 17.1 | V |
| Breakdown Voltage (VBR) at 25 °C | 18.5 - 20.5 | V |
| Clamping Voltage (VCL) at 8/20 µs | 32.5 | V |
| Leakage Current at 25 °C | 0.2 | µA |
| Operating Junction Temperature Range | -55 to +150 | °C |
| Storage Temperature Range | -65 to +150 | °C |
| Maximum Lead Temperature for Soldering | 260 | °C |
| Package Type | SMC | |
| MSL Level | MSL 1 |
Key Features
- AEC-Q101 Qualified: Meets automotive industry standards for reliability and performance.
- High Power Capability: Peak pulse power dissipation of up to 10 kW (8/20 µs) and 1500 W (10/1000 µs).
- Low Leakage Current: 0.2 µA at 25 °C and 1 µA at 85 °C.
- High Junction Temperature: Operating junction temperature range of -55 to +150 °C.
- Compliance with Standards: Complies with UL94 V0, J-STD-020 MSL level 1, and various IEC and ISO standards for surge and ESD protection.
- Planar Technology: Ensures compatibility with high-end circuits requiring low leakage current and high junction temperature for long-term reliability.
- Lead Finishing: Matte tin plating for solderability.
Applications
The SM15T18AY is designed to protect sensitive automotive circuits against electrical surges and electrostatic discharges. It is particularly suited for applications in:
- Automotive electronics, including infotainment systems, navigation, and safety systems.
- Protection against ISO 7637-2 surges and ISO 10605 electrostatic discharges.
- High-density PCB designs requiring robust surge and ESD protection.
Q & A
- What is the peak pulse power dissipation of the SM15T18AY?
The peak pulse power dissipation is up to 10 kW (8/20 µs) and 1500 W (10/1000 µs).
- What is the stand-off voltage of the SM15T18AY?
The stand-off voltage is 17.1 V.
- What is the clamping voltage of the SM15T18AY at 8/20 µs?
The clamping voltage is 32.5 V.
- What is the leakage current at 25 °C for the SM15T18AY?
The leakage current is 0.2 µA at 25 °C.
- What is the operating junction temperature range of the SM15T18AY?
The operating junction temperature range is -55 to +150 °C.
- Is the SM15T18AY AEC-Q101 qualified?
Yes, the SM15T18AY is AEC-Q101 qualified.
- What package type is the SM15T18AY available in?
The SM15T18AY is available in the SMC (Surface Mount) package type.
- What are the compliance standards for the SM15T18AY?
The SM15T18AY complies with various standards including UL94 V0, J-STD-020 MSL level 1, and several IEC and ISO standards.
- What is the maximum lead temperature for soldering the SM15T18AY?
The maximum lead temperature for soldering is 260 °C.
- What is the storage temperature range for the SM15T18AY?
The storage temperature range is -65 to +150 °C.
