1SS400

The 1SS400 is a surface-mount Schottky barrier diode manufactured by onsemi, designed for high-speed switching applications. It features a low forward voltage drop of typically 0.35 V at 100 mA, which enhances efficiency and reduces power loss in circuits. The device has a maximum repetitive peak reverse voltage (VRRM) of 400 V, making it suitable for use in high-voltage rectification tasks. Its continuous forward current rating is 1 A, allowing reliable operation under moderate load conditions. This diode utilizes a planar technology structure that ensures excellent thermal performance and long-term reliability. It exhibits fast switching speeds due to its Schottky construction, which minimizes reverse recovery time—critical in applications such as switch-mode power supplies (SMPS), DC-DC converters, and battery protection circuits. The low junction capacitance further supports high-frequency operation, reducing signal distortion and improving overall system efficiency. The 1SS400 is packaged in a compact SOD-123 form factor, ideal for space-constrained designs in modern electronics. This surface-mount package enables automated assembly processes, supporting high-volume production while maintaining consistent quality. The diode is RoHS-compliant and contains no lead, aligning with environmental standards for electronic components. Common applications include power management in consumer electronics, industrial control systems, automotive electronics, and telecommunications equipment. It is particularly effective in protecting circuits from reverse polarity and in providing efficient rectification in low-current, high-voltage environments. Its robust design allows operation across a wide temperature range—from -55°C to +150°C—making it suitable for both harsh industrial and standard commercial environments. Engineers appreciate the 1SS400 for its balance of performance, reliability, and cost-effectiveness. Its integration into power supply designs helps reduce heat generation and improve energy efficiency, which is increasingly important in portable and battery-powered devices. By minimizing conduction losses and enabling faster switching, this diode contributes to more compact and efficient power solutions.