KBPC3510W

The KBPC3510W is a high-performance single-phase bridge rectifier with a 35A average forward current rating and 1000V peak reverse voltage capability. Housed in a rugged KBPC-W metal case package with wider body dimensions (28 x 28 x 30mm), this bridge rectifier provides superior thermal performance compared to plastic-encapsulated alternatives. The metal case is electrically isolated from the internal diode junctions (2500VAC isolation voltage), allowing direct mounting to a grounded chassis or heatsink for efficient heat dissipation. The device features four glass-passivated silicon rectifier diodes arranged in a full-wave bridge configuration. Glass-passivated junction technology provides stable electrical characteristics, low reverse leakage current, and excellent long-term reliability. The KBPC3510W can withstand surge currents up to 400A, making it suitable for applications with high inrush currents. The 0.25″ (6.35mm) Faston quick-connect terminals enable easy assembly and field replacement. With its 1000V voltage rating and 35A current handling capability, the KBPC3510W is ideal for a wide range of high-power applications including industrial power supplies, welding equipment, battery chargers, DC motor drives, UPS systems, and inverter input rectification stages where robust performance and reliable thermal management are essential.

The KBPC3510W operates as a high-current full-wave single-phase bridge rectifier. Its functional principle is: 1) Full-Wave Bridge Topology: Four high-power silicon rectifier diodes are arranged in a bridge configuration with two AC input terminals and two DC output terminals (positive and negative). The diode arrangement ensures that current flows through the external load in the same direction during both positive and negative AC half-cycles. 2) Positive Half-Cycle: During the positive half-cycle (AC1 positive with respect to AC2), two diodes in the bridge conduct: one connects AC1 to the positive DC output rail, and another connects the negative DC output rail to AC2. Current flows from AC1 through the first diode, through the external load from +DC to -DC, through the second diode, and returns to AC2. 3) Negative Half-Cycle: During the negative half-cycle (AC2 positive with respect to AC1), the other two diodes conduct: one connects AC2 to the positive DC rail, and another connects the negative DC rail to AC1. Current again flows through the load from +DC to -DC, maintaining the same output polarity. 4) Thermal Considerations: At 35A current, the total power dissipation (two diode drops × 35A) can be significant (approximately 75W at rated current). The metal case package transfers this heat to an external heatsink. The insulated case (2500VAC isolation) allows the heatsink to be grounded for safety while maintaining electrical isolation from the bridge’s internal circuitry. Surge current rating of 400A ensures the bridge can handle power-on inrush currents without damage.

• Industrial switch-mode power supply input rectification stages
• High-current battery chargers for forklifts, golf carts, and EVs
• Arc welding equipment and plasma cutting power supplies
• DC motor drives and variable speed control systems
• Uninterruptible power supply (UPS) rectifier sections
• Solar inverter and wind turbine converter input stages
• High-power LED driver power supplies
• Heavy-duty industrial equipment power supplies