This document describes the features and characteristics of Littelfuse's SP725 series SCR diode array products, which are used for ESD and transient overvoltage protection. The product has bidirectional protection capability for both high voltage and low voltage, and can be applied in various electronic design fields.
The SP725 is an array of SCR/Diode bipolar structures designed for ESD and transient over‑voltage protection of sensitive input circuits. It offers four independent input channels (pins 1‑4) that can clamp to V+ or V‑ when a transient exceeds ±1 V, providing fast protection for microprocessor, logic, and analog inputs.
Key specifications include a continuous supply voltage range of ±35 V, peak pulse current capability of up to 4 A (8/20 µs), typical input leakage of 5 nA at 25 °C, and input capacitance of 5 pF. The device meets Level 4 HBM ESD standards (>8 kV direct discharge, >15 kV air discharge) and operates from –40 °C to 105 °C. Package options are 8‑lead SOIC, available in lead‑free and green‑solder‑compatible versions.
| Continuous Supply Voltage (V+ to V‑) | +35 V |
|---|---|
| Peak Pulse Current (8/20 µs) | 4 A |
| Input Leakage Current (typical) | 5 nA at 25 °C |
| Operating Temperature Range | -40 °C to 105 °C |
| Maximum Soldering Peak Temperature | 260 °C |
The continuous supply voltage rating is +35 V between V+ and V‑.
Do not exceed a peak temperature of 260 °C when soldering the device.