ESD9R3

ESD9R3 is a transient voltage suppressor diode manufactured by onsemi, designed for robust protection against electrostatic discharge (ESD) events. It features a low clamping voltage of 9.3 V at a peak pulse current of 1 A, ensuring effective suppression of ESD pulses while minimizing stress on protected circuits. The device operates with a very fast response time—typically under 1 picosecond—which allows it to react almost instantaneously to transient voltage spikes, making it ideal for high-speed signal lines. This component is characterized by its low leakage current, typically less than 1 μA at 0 V, which ensures minimal power consumption and stable operation in sensitive applications. Its compact surface-mount package (SOD-523) enables efficient board space utilization, supporting high-density circuit designs. The ESD9R3 also exhibits excellent reliability under repeated ESD stress, meeting IEC 61000-4-2 Level 4 standards for ESD immunity, equivalent to ±8 kV contact discharge. The device is commonly used in consumer electronics, automotive systems, and industrial equipment where reliable ESD protection is essential. It effectively safeguards input/output lines in USB ports, audio interfaces, data communication lines, and sensor connections from damage caused by human body model (HBM) discharges. Its design supports both single-line and multi-line protection schemes, offering flexibility in system-level ESD mitigation strategies. Additionally, the ESD9R3 is lead-free and RoHS-compliant, aligning with environmental regulations and sustainable manufacturing practices. It operates reliably over a wide temperature range from -40°C to +125°C, making it suitable for harsh environments such as automotive infotainment systems or outdoor industrial controls. The diode’s consistent performance across varying conditions ensures long-term durability and reduced risk of field failures.