Overview
The SM15T39CA is a Transient Voltage Suppressor (TVS) diode produced by STMicroelectronics. It is part of the SM15T TVS series, designed to protect sensitive equipment against electrostatic discharges and electrical overstress. This component is particularly suited for high-end equipment and Switch-Mode Power Supplies (SMPS) where low leakage current and high junction temperature are critical for reliability and stability over time.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Pulse Power (10/1000 μs) | 1500 | W |
| Stand-off Voltage (VWM) | 33.3 | V |
| Peak Pulse Current (10/1000 μs) | See datasheet for specific values | A |
| Operating Junction Temperature | -55 to +150 | °C |
| Peak Forward Surge Current (10 ms single half sine-wave) | 200 | A |
| Leakage Current at VWM | 0.2 | μA |
| Package Type | SMC (DO-214AB) | |
| Lead Finishing | Matte tin plating | |
| RoHS Compliance | Ecopack2 | |
| Grade | Industrial | |
| Directionality | Unidirectional, Bidirectional |
Key Features
- Peak pulse power capability of 1500 W with a 10/1000 μs waveform and up to 10 kW with an 8/20 μs waveform.
- Stand-off voltage range from 5 V to 188 V.
- Available in unidirectional and bidirectional types.
- Low leakage current of 0.2 μA at 25 °C.
- High junction temperature of up to 150 °C.
- Low inductance and excellent clamping capability.
- Meets MSL level 1, per J-STD-020, with a maximum peak of 260 °C.
- AEC-Q101 qualified available for automotive applications.
Applications
The SM15T39CA is used to protect sensitive electronics against voltage transients induced by inductive load switching, lighting, and other sources. Typical applications include:
- Protection of ICs, MOSFETs, and signal lines in consumer electronics.
- Industrial and automotive systems where high reliability is required.
- Telecommunication equipment.
- Switching transients induced by large coils or industrial motors.
Q & A
- What is the peak pulse power rating of the SM15T39CA? The peak pulse power rating is 1500 W with a 10/1000 μs waveform.
- What is the stand-off voltage of the SM15T39CA? The stand-off voltage (VWM) is 33.3 V.
- Is the SM15T39CA available in both unidirectional and bidirectional types? Yes, it is available in both unidirectional and bidirectional configurations.
- What is the operating junction temperature range of the SM15T39CA? The operating junction temperature range is from -55 °C to +150 °C.
- What is the leakage current at VWM for the SM15T39CA? The leakage current at VWM is 0.2 μA at 25 °C.
- What package type is the SM15T39CA available in? The SM15T39CA is available in the SMC (DO-214AB) package.
- Is the SM15T39CA RoHS compliant? Yes, it is RoHS compliant with an Ecopack2 designation.
- What are the typical applications of the SM15T39CA? Typical applications include protection of ICs, MOSFETs, and signal lines in consumer, industrial, automotive, and telecommunication systems.
- Does the SM15T39CA meet any specific automotive standards? Yes, it is AEC-Q101 qualified for automotive applications.
- What is the peak forward surge current rating of the SM15T39CA? The peak forward surge current rating is 200 A for a 10 ms single half sine-wave.
