Slkor FR107 Fast Recovery Diode: Optimal SMD Solution for 1A/1kV High-Frequency and High-Voltage Rectification

Home News Daily Highlight Slkor FR107 Fast Recovery Diode: Optimal SMD Solution for 1A/1kV High-Frequency and High-Voltage Rectification

2026-08-14 35

In the hardware design of switching power supplies, LED drivers, industrial control modules, inverters and adapters, high-frequency and high-voltage rectification as well as freewheeling circuits for inductive loads impose strict requirements on diode switching speed and reverse withstand voltage. Conventional power-frequency rectifier diodes suffer from slow reverse recovery speed, large power loss and severe heat generation under high-frequency operating conditions. The Slkor FR107 is a fast recovery diode packaged in SOD-123FL. It combines 1000V high reverse blocking voltage, 1A continuous current and 500ns fast reverse recovery characteristics, serving as a cost-effective SMD solution for medium and low-power high-frequency and high-voltage rectification scenarios.

Featuring a reverse recovery time of 500ns, the FR107 delivers a significantly faster turn-off speed than power-frequency rectifier diodes such as the 1N4007. It effectively reduces reverse recovery loss under high-frequency operation, lowers device heat generation, and improves the overall conversion efficiency of power supplies, making it ideal for rectification and PWM freewheeling circuits of tens-of-kilohertz switching power supplies.

2.3 Controlled Conduction Loss with 1.3V Forward Voltage Drop

Under the rated withstand voltage of 1000V, the reverse leakage current is only 5μA, resulting in extremely low static reverse power consumption. It minimizes heat generation caused by leakage current during equipment standby, greatly improving the long-term operational stability of high-voltage power supply equipment.

2.6 Glass Passivation Chip Process Ensures High Reliability

Switching Power Supplies and Adapters: High-frequency rectification loops for medium and low-power AC-DC and flyback power supplies;
Inverter and Charging Equipment: Rectification for small inverters and high-voltage charging modules;

4.1 Distinguish Application Scenarios and Avoid Improper Device Replacement

Reserve a safety margin of more than 30% for reverse operating voltage, and avoid long-term operation close to the 1000V withstand voltage limit. Do not keep the average forward current running at full 1A load continuously. Optimize the heat dissipation area of PCB copper foil under heavy-load conditions.

4.4 Frequency Application Boundary

Control the peak temperature and baking duration of reflow soldering, avoid long-term overheating that may degrade chip performance, and ensure consistency in mass production.

Adopting the universal SOD-123FL SMD package, it facilitates equipment miniaturization upgrading with convenient material procurement and mass production. Widely used in rectification and freewheeling protection circuits of switching power supplies, LED drivers, industrial controls and charging equipment, it is a highly competitive domestic alternative device in the field of high-frequency and high-voltage SMD rectification.

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