Overview
The SM15T18CA is a Transient Voltage Suppressor (TVS) diode produced by STMicroelectronics. It is part of the SM15T series designed to protect sensitive equipment against electrostatic discharges and electrical overstress. This component is particularly useful for protecting against voltage transients induced by lightning, inductive load switching, and other high-energy pulses.
The SM15T18CA features a planar technology, making it compatible with high-end equipment and Switch-Mode Power Supplies (SMPS) where low leakage current and high junction temperature are crucial for reliability and stability.
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 and Bidirectional | |
| Low Leakage Current at 25 °C | 0.2 µA | µA |
| Operating Junction Temperature Range | -55 °C to 150 °C | °C |
| High Power Capability at Tjmax | Up to 1250 W (10/1000 µs) | W |
| Lead Finishing | Matte tin plating | |
| Package | SMC (DO-214AB) |
Key Features
- High peak pulse power capability: up to 1500 W (10/1000 μs) and up to 10 kW (8/20 μs)
- Low leakage current: 0.2 µA at 25 °C
- High operating junction temperature: up to 150 °C
- Available in unidirectional and bidirectional types
- Low profile package suitable for automated placement
- Glass passivated chip junction for reliability
- Low inductance for effective transient suppression
- Meets MSL level 1, per J-STD-020, with a maximum peak of 260 °C
- AEC-Q101 qualified for automotive applications
Applications
The SM15T18CA is used in various applications to protect sensitive electronics against voltage transients. These include:
- Protection against lightning-induced transients and conducted electrical overstress
- Protection of ICs, MOSFETs, and signal lines in consumer, computer, industrial, automotive, and telecommunication systems
- Protection against switching transients induced by large coils or industrial motors
- Use in high-end equipment and Switch-Mode Power Supplies (SMPS) where reliability and stability are critical
Q & A
- What is the peak pulse power capability of the SM15T18CA?
The SM15T18CA has a peak pulse power capability of up to 1500 W with a 10/1000 μs waveform and up to 10 kW with an 8/20 μs waveform.
- What is the operating junction temperature range of the SM15T18CA?
The operating junction temperature range is from -55 °C to 150 °C.
- Is the SM15T18CA available in both unidirectional and bidirectional types?
- What is the leakage current of the SM15T18CA at 25 °C?
The leakage current is 0.2 µA at 25 °C.
- What package type is the SM15T18CA available in?
The SM15T18CA is available in the SMC (DO-214AB) package.
- Is the SM15T18CA AEC-Q101 qualified?
- What are the typical applications of the SM15T18CA?
The SM15T18CA is used to protect sensitive electronics in consumer, computer, industrial, automotive, and telecommunication systems against voltage transients.
- What is the lead finishing of the SM15T18CA?
The leads are finished with matte tin plating.
- Does the SM15T18CA meet any specific industry standards?
- What is the failure mode of the SM15T18CA in an overstress condition?
In an overstress condition, the failure mode is a short circuit.
