S1A-S1M is a 1.0A surface mount glass passivated rectifier produced by Won-Top Electronics. It has glass passivated die construction, low voltage drop, high overload capability, low power loss, built-in strain relief, plastic case material with UL 94V-O flammability rating.
The S1A‑S1M series is a glass‑passivated, surface‑mount rectifier designed for automatic assembly. It offers a low forward voltage drop, high surge capability (30 A peak) and low power loss, with a UL‑rated plastic case.
Mechanical data include a molded‑plastic case, solder‑plated terminals, a weight of about 0.093 g, and a recommended PCB footprint of 0.050 in (1.27 mm) minimum. The document provides maximum ratings, typical forward and reverse characteristics, derating curves, and ordering information for various tape‑and‑reel options.
| Forward Voltage @ 1 A | 1.10 V |
|---|---|
| Average Rectified Output Current @ 100 °C | 1.0 A |
| Reverse Recovery Time | 2.5 µs |
| Typical Junction Capacitance | 15 pF |
| Thermal Resistance | 30 K/W |
| Weight | 0.093 g |
| Operating Temperature Range | -65 °C to +175 °C |
The device is rated for a 30 A peak repetitive surge current.
The typical forward voltage is 1.10 V at 1 A.
The recommended minimum footprint is 0.050 in (1.27 mm).