SMAJ16A TVS Diode 400W Unidirectional, SMA (DO-214AC)
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Prices updated: 13 Oct 2026
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About this product
The SMAJ16A is a 400 W unidirectional TVS diode in an SMA (DO-214AC) surface-mount package with a 16 V standoff voltage. It clamps fast voltage transients from ESD, switching and lightning to protect I/O lines, VCC buses and sensitive power circuits in consumer devices and power supplies.
Specifications
- Peak pulse power
- 400 W
- Standoff voltage
- 16 V
- Polarity
- Unidirectional
- Package
- SMA (DO-214AC)
- Mounting
- Surface-mount (SMD)
Frequently asked questions
Where should I place a TVS diode on the board?
Place it as close as possible to the connector or input it protects, between the signal or rail and ground, with short traces. Observe the cathode band for correct polarity.
How do I choose the right standoff voltage?
Choose a standoff voltage above the normal maximum voltage of the line, so the diode stays off during normal operation. This 16 V device suits lines that stay below 16 V, such as 12 V systems with margin.