Five-channel ESD clamp in a SOT-23-6
The STMicroelectronics ESDA6V1-5SC6 is a Zener-based transient voltage suppressor array in the ESDA TRANSIL™ series, packing five unidirectional channels into a SOT-23-6 package. It clamps at a 6.1V breakdown threshold with a 3V reverse standoff rating, making it a fit for protecting 3.3V or lower-voltage signal lines on general-purpose boards — think I/O ports, keypad interfaces, or sensor inputs that see ESD from human touch or cable discharge. The 100W peak pulse power rating per the datasheet gives a reasonable energy-absorption ceiling for the transient events these lines typically see in an indoor or mild industrial environment.
What the 3V standoff and 6.1V breakdown mean for the rail
A 3V reverse standoff voltage means the part stays off the bus below 3V — no leakage loading on a 3.3V supply rail in normal operation. The 6.1V minimum breakdown ensures the clamp triggers before the protected IC's absolute-maximum input rating is reached on a typical 3.3V-tolerant logic pin. With no power line protection feature, this device is meant for signal-line ESD clamping, not for shunting high-energy surges on a power bus.
For the procurement desk, that translates to standard lead times through the distribution channel without the urgency of a last-time-buy deadline. The part is RoHS-compliant, so no exemption paperwork or waivers are needed for EU-market builds.