Overview
The SM6T18A, produced by STMicroelectronics, is a transient voltage suppressor (TVS) designed to protect sensitive equipment against electrostatic discharges and electrical overstress. This device complies with standards such as IEC 61000-4-2, MIL STD 883, method 3015, and IEC 61000-4-4 and 5. It 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.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Peak Pulse Power (10/1000 μs) | 600 W | - |
| Peak Pulse Power (8/20 μs) | 4 kW | - |
| Stand-off Voltage Range | 5 V to 188 V | - |
| Directionality | Unidirectional, Bidirectional | - |
| Low Leakage Current at 25 °C | 0.2 μA | - |
| Low Leakage Current at 85 °C | 1 μA | - |
| Operating Junction Temperature (Tj max) | 150 °C | - |
| High Power Capability at Tj max (10/1000 μs) | Up to 350 W | - |
| Lead Finishing | Matte tin plating | - |
| Package | SMB (DO-214AA) | - |
| Maximum Reverse Voltage (V RM) | 15.3 V | - |
| Operating Junction Temperature Range | -55 °C to 150 °C | - |
Key Features
- Low profile package ideal for automated placement
- Glass passivated chip junction
- Available in unidirectional and bidirectional types
- Peak pulse power capability of 600 W with a 10/1000 μs waveform and 4 kW with an 8/20 μs waveform
- Excellent clamping capability
- Low inductance
- Meets MSL level 1, per J-STD-020, with a maximum peak of 260 °C
- AEC-Q101 qualified for automotive applications
- Compliant with UL94 V-0 flammability rating
- Solderable leads per J-STD-002 and JESD 22-B102
Applications
The SM6T18A 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
- Signal lines of sensor units
- ICs and MOSFETs
Q & A
- What is the peak pulse power of the SM6T18A?
The SM6T18A has a peak pulse power of 600 W with a 10/1000 μs waveform and 4 kW with an 8/20 μs waveform.
- What are the operating junction temperature limits of the SM6T18A?
The operating junction temperature range is from -55 °C to 150 °C.
- Is the SM6T18A available in both unidirectional and bidirectional types?
- What is the stand-off voltage range for the SM6T series?
The stand-off voltage range for the SM6T series is from 5 V to 188 V.
- What is the leakage current of the SM6T18A at 25 °C and 85 °C?
The leakage current is 0.2 μA at 25 °C and 1 μA at 85 °C.
- What package type is used for the SM6T18A?
The SM6T18A is packaged in SMB (DO-214AA).
- Is the SM6T18A compliant with automotive standards?
- What are the flammability and solderability standards for the SM6T18A?
The SM6T18A meets UL94 V-0 flammability rating and is solderable per J-STD-002 and JESD 22-B102.
- What are the typical applications of the SM6T18A?
The SM6T18A is used in consumer electronics, computer systems, industrial equipment, automotive systems, telecommunication devices, and signal lines of sensor units.
- Does the SM6T18A have high power capability at high junction temperatures?
