Overview
The SM15T18A-E3/57T, produced by Vishay General Semiconductor - Diodes Division, is a surface mount TRANSZORB® transient voltage suppressor (TVS) diode. This component is designed to protect sensitive electronics from voltage transients induced by inductive load switching and lightning. It is part of the SM15T series, which offers a broad range of voltage ratings and is suitable for various applications including consumer, computer, industrial, automotive, and telecommunication systems.
Key Specifications
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Peak Pulse Power Dissipation (10/1000 μs waveform) | PPPM | 1500 | W |
| Peak Pulse Current (10/1000 μs waveform) | IPPM | See next table | A |
| Power Dissipation on Infinite Heatsink at TA = 50 °C | PD | 6.5 | W |
| Peak Forward Surge Current (10 ms single half sine-wave, unidirectional only) | IFSM | 200 | A |
| Operating Junction and Storage Temperature Range | TJ, TSTG | -65 to +150 | °C |
| Reverse Stand-Off Voltage (VWM) | VWM | 17.1 to 18.9 | V |
| Breakdown Voltage (VBR) | VBR | 18.9 to 20.5 | V |
| Maximum Clamping Voltage (VC) at IPPM (10/1000 μs) | VC | 25.2 | V |
| Package Type | DO-214AB (SMC) | ||
| Polarity | Unidirectional, Bidirectional |
Key Features
- Low profile package ideal for automated placement.
- Glass passivated chip junction for enhanced 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.
Applications
The SM15T18A-E3/57T is used in sensitive electronics to protect against voltage transients induced by inductive load switching and lightning. Typical applications include:
- 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 dissipation of the SM15T18A-E3/57T? The peak pulse power dissipation is 1500 W with a 10/1000 μs waveform.
- What is the operating junction and storage temperature range? The operating junction and storage temperature range is -65 to +150 °C.
- What package type is used for the SM15T18A-E3/57T? The package type is DO-214AB (SMC).
- Is the SM15T18A-E3/57T available in both unidirectional and bidirectional configurations? Yes, it is available in both unidirectional and bidirectional configurations.
- What is the maximum clamping voltage at IPPM (10/1000 μs) for the SM15T18A-E3/57T? The maximum clamping voltage is 25.2 V.
- Is the SM15T18A-E3/57T AEC-Q101 qualified? Yes, it is AEC-Q101 qualified for automotive applications.
- What is the typical thermal resistance, junction to ambient air, for the SM15T18A-E3/57T? The typical thermal resistance, junction to ambient air, is 75 °C/W.
- What are the common applications of the SM15T18A-E3/57T? Common applications include protection in consumer electronics, computer systems, industrial equipment, automotive systems, and telecommunication devices.
- How does the SM15T18A-E3/57T protect against voltage transients? It protects against voltage transients induced by inductive load switching and lightning by clamping the voltage to a safe level.
- What is the peak forward surge current rating for the SM15T18A-E3/57T? The peak forward surge current rating is 200 A for a 10 ms single half sine-wave.
