STMicroelectronics shrinks TVS protection to 0402 package

STMicroelectronics has launched the TVS221SC-1T2, a transient suppressor that is more than 60% smaller than conventional TVS devices while holding a 26.2V clamping voltage across a 16A surge range. The part is aimed at space-constrained consumer, industrial, home-automation and healthcare electronics, with production underway now.

Why it matters: - The TVS221SC-1T2 gives designers smaller protection for compact electronics without giving up surge handling. - The device targets products where board space is tight, including consumer products, industrial electronics, home-automation devices and healthcare equipment. - The part’s low leakage current can help extend battery life in portable and IoT devices.

What happened: - STMicroelectronics introduced the TVS221SC-1T2 transient voltage suppressor. - The device is more than 60% smaller than conventional TVS parts. - STMicroelectronics says the device maintains a constant 26.2V clamping voltage across the full 16A surge-current range and up to 125°C. - The part is in production now. - The device is available from $0.10 in orders of 1,000 pieces. - More information is available in STMicroelectronics’ announcement.

The details: - The TVS221SC-1T2 uses an internal voltage-control loop. - The part is a single-line, unidirectional TVS device. - STMicroelectronics says the device delivers stronger clamping protection than conventional suppressors in larger QFN-2L, SOD128, SMA, SMB and SMC packages. - The close ratio between clamping voltage and breakdown voltage allows designers to replace over-specified protection components with tighter designs. - The device protects I/O pins and power connections such as VBUS in USB Type-C ports. - Peak pulse current is 16A under IEC 61000-4-5. - ESD immunity exceeds IEC 61000-4-2 level 4 at ±8kV contact discharge and ±30kV air discharge. - Typical leakage current is 25nA. - Capacitance is 75nF, which helps preserve low-speed data-line integrity. - The device comes in an ultra-small 0402 leadless SOD882 package, or 1006 metric. - The package measures 0.6mm by 1.0mm.

Between the lines: - STMicroelectronics is positioning the part as a way to simplify protection design, not just reduce size. - The combination of high surge handling, low leakage and small packaging suggests a focus on densely packed, battery-powered systems. - The broader package comparison signals a push to displace larger legacy suppressor formats in compact designs.

What's next: - Designers can now source the TVS221SC-1T2 for new compact electronics builds. - Broader adoption will likely depend on how quickly OEMs switch from larger, over-specified protection parts to smaller optimized designs.

The bottom line: - STMicroelectronics is betting that smaller surge protection with tight electrical performance will win in space-constrained devices.