STMicroelectronics 1-Element Uni-Directional TVS Diode 400 W, 2-Pin SMA Flat SMA4F20AY

STMicroelectronics SMA4F20AY is a 1-element unidirectional transient voltage suppressor (TVS) diode designed for protecting automotive and sensitive electronic circuits from surges and electrostatic discharge events. Operating in a 2-pin SMA flat surface mount package measuring 4.6 mm length, 2.9 mm width, and 1.05 mm height, it efficiently safeguards circuit components while occupying minimal PCB space.

This TVS diode offers a peak pulse power dissipation rating of 400 W (10/1000 microseconds) and can withstand pulses up to 2.5 kW (8/20 microseconds). It delivers a minimum breakdown voltage of 22.2 V and a maximum reverse stand-off voltage of 20 V, clamping surges effectively at 42.8 V. Its low leakage current of 0.2 μA at 25 °C helps conserve energy during normal operation.

Engineered for harsh conditions, the SMA4F20AY supports an operating temperature range from -55 °C up to 175 °C and complies with the automotive standard AEC-Q101, ensuring high reliability and long-term stability for automotive and industrial applications. The planar technology utilized results in improved junction temperature tolerance and low leakage, contributing to device longevity.

The diode is surface-mounted with matte tin plating leads, offering excellent solderability and corrosion resistance, suitable for high-volume manufacturing and automated assembly processes. Its single-element unidirectional configuration suits circuits requiring polarity-specific protection.

Applications commonly include transient surge protection for automotive onboard electronics, industrial control systems, power supplies, and sensitive semiconductor devices. The flat, thin profile enables integration in compact PCB layouts where space and thermal dissipation are critical factors.

Provides robust transient voltage suppression for sensitive automotive circuits. Features a unidirectional diode configuration ensuring effective surge protection. Supports a peak pulse power dissipation of 400 W (10/1000 μs) and 2.5 kW (8/20 μs).

Compact SMA flat package with dimensions 4.6 x 2.9 x 1.05 mm for PCB space savings. Operational temperature range from -55°C to 175°C for harsh environments. Low leakage current of 0.2 μA at 25 °C ensuring minimal standby power loss.

Complies with AEC-Q101 automotive standard for reliability and quality assurance. Matte tin plating lead finish enhances solderability and corrosion resistance. Explore more STMicroelectronics TVS Diodes and electronic components at EnvMart for reliable surge protection and enhanced circuit safety.