Overview
The SM15T18A is a Transil diode from STMicroelectronics, designed to provide high overvoltage protection for sensitive electronic equipment. This component is part of the SM15T TVS series, which is engineered to protect against electrostatic discharges (ESD) and electrical overstress (EOS) according to standards such as IEC 61000-4-2, MIL STD 883 Method 3015, and IEC 61000-4-4 and 5. The SM15T18A is particularly suited for applications requiring protection against surges below 1500 W (10/1000 μs).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 | W |
| Peak Pulse Power (8/20 μs) | Up to 10 kW | W |
| Stand-off Voltage Range | 5 V to 188 V | V |
| Directionality | Unidirectional, Bidirectional | |
| Maximum Reverse Leakage Current at 25 °C | 0.2 µA | µA |
| Operating Junction Temperature Range | -55 °C to 150 °C | °C |
| Peak Pulse Current (10/1000 μs) | 59.5 A | A |
| Package Type | SMC (DO-214AB) | |
| Lead Finishing | Matte Tin Plating |
Key Features
- Low profile package ideal for automated placement.
- Glass passivated chip junction for reliability.
- Available in unidirectional and bidirectional configurations.
- 1500 W peak pulse power capability with a 10/1000 μs waveform.
- Excellent clamping capability and low inductance.
- Meets MSL level 1, per J-STD-020, with a maximum peak of 260 °C.
- AEC-Q101 qualified for automotive applications.
- High power capability at high junction temperatures (up to 1250 W at Tjmax).
Applications
The SM15T18A is used to protect sensitive electronics against voltage transients induced by inductive load switching and lighting. It is suitable for various applications including:
- Consumer electronics
- Computer systems
- Industrial equipment
- Automotive systems
- Telecommunication devices
- Protection of ICs, MOSFETs, and signal lines of sensor units.
Q & A
- What is the peak pulse power rating of the SM15T18A?
The SM15T18A has a peak pulse power rating of 1500 W (10/1000 μs) and up to 10 kW (8/20 μs).
- What are the operating junction temperature limits for the SM15T18A?
The operating junction temperature range is from -55 °C to 150 °C.
- Is the SM15T18A available in both unidirectional and bidirectional configurations?
- What is the maximum reverse leakage current at 25 °C for the SM15T18A?
The maximum reverse leakage current at 25 °C is 0.2 µA).
- What package type is the SM15T18A available in?
The SM15T18A is available in the SMC (DO-214AB) package type).
- Is the SM15T18A AEC-Q101 qualified?
- What is the peak pulse current rating for the SM15T18A?
The peak pulse current rating is 59.5 A (10/1000 μs)).
- What are the typical applications of the SM15T18A?
The SM15T18A is used to protect sensitive electronics in consumer, computer, industrial, automotive, and telecommunication systems).
- Does the SM15T18A meet any specific industry standards for moisture sensitivity?
- What is the lead finishing of the SM15T18A?
The lead finishing is matte tin plating).
