Overview
The SM15T18A-M3/57T is a transient voltage suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division. This component is part of the SM15T series, designed to provide protection against voltage transients in sensitive electronic circuits. It is particularly useful in applications where protection against inductive load switching and lightning-induced voltage transients is crucial.
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 datasheet for specific values | A |
| Power Dissipation on Infinite Heatsink at TA = 50 °C | PD | 6.5 | W |
| Peak Forward Surge Current (10 ms single half sine-wave, uni-directional only) | IFSM | 200 | A |
| Operating Junction and Storage Temperature Range | TJ, TSTG | -65 to +150 | °C |
| Reverse Stand-Off Voltage (VWM) | VWM | 15.3 | V |
| Breakdown Voltage (VBR) | VBR | 17.1 to 18.9 | V |
| Clamping Voltage (VC) at IPPM (10/1000 μs) | VC | 25.2 | V |
| Package Type | DO-214AB (SMC) | ||
| Mounting Type | Surface Mount |
Key Features
- Low profile package ideal for automated placement.
- Glass passivated chip junction for reliable operation.
- 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-M3/57T is used in various applications to protect sensitive electronics against voltage transients. These include:
- Consumer electronics.
- Computer systems.
- Industrial control systems.
- Automotive systems.
- Telecommunication equipment.
It is particularly effective in protecting ICs, MOSFETs, and signal lines of sensor units from switching transients and lightning-induced voltage spikes.
Q & A
- What is the peak pulse power dissipation of the SM15T18A-M3/57T? The peak pulse power dissipation is 1500 W with a 10/1000 μs waveform.
- What is the operating temperature range of this component? The operating junction and storage temperature range is -65 to +150 °C.
- What package type does the SM15T18A-M3/57T use? It uses the DO-214AB (SMC) package type.
- Is the SM15T18A-M3/57T suitable for automotive applications? Yes, it is AEC-Q101 qualified for automotive use.
- What is the clamping voltage of the SM15T18A-M3/57T at IPPM (10/1000 μs)? The clamping voltage is 25.2 V.
- What are the typical applications of the SM15T18A-M3/57T? It is used to protect sensitive electronics in consumer, computer, industrial, automotive, and telecommunication systems.
- What is the peak forward surge current rating of this component? The peak forward surge current rating is 200 A for a 10 ms single half sine-wave.
- Is the SM15T18A-M3/57T available in both unidirectional and bidirectional configurations? Yes, it is available in both unidirectional and bidirectional configurations.
- What is the maximum reverse leakage current at VWM for the SM15T18A-M3/57T? The maximum reverse leakage current at VWM is specified in the datasheet and varies by voltage rating.
- How does the SM15T18A-M3/57T protect against voltage transients? It protects against voltage transients by clamping the voltage to a safe level, preventing damage to sensitive electronics.
