Passive Components

KBL406 Bridge Rectifier 4A 600V – Single Phase Full Wave KBL Package

The KBL406 is a robust 4 Amp, 600 Volt single-phase bridge rectifier diode housed in the industry-standard KBL (SIP-4) through-hole package. It is designed to convert AC (alternating current) to pulsating DC (direct current) with full-wave rectification — a fundamental building block in countless power supply circuits, battery chargers, motor drivers, and industrial control systems. Constructed with a silicon junction and molded in a flame-retardant plastic encapsulation, the KBL406 offers excellent thermal performance and electrical isolation. It features a maximum repetitive peak reverse voltage (VRRM) of 600V, a forward voltage drop of just 1.1V at 4A, and an impressive forward surge current capability of 150A — making it highly tolerant of inrush currents during power-on. Each KBL406 module integrates four rectifier diodes internally in a bridge configuration, with four clearly marked pins (AC1, AC2, V+, V−) for easy PCB mounting. The compact KBL footprint saves board space while delivering reliable performance over a wide operating temperature range of -55°C to +150°C. In the Indian DIY and repair market, the KBL406 is a go-to replacement for failed bridge rectifiers in SMPS units, UPS systems, AC-to-DC adapters, and home appliance power boards. Hobbyists and engineering students regularly stock this part for building regulated power supplies, battery eliminators, and variable DC bench supplies. With its 600V blocking voltage, it safely handles 230V AC mains rectification with ample headroom. Whether you are repairing a CFL/LED driver, building a lab power supply, or prototyping a motor speed controller, the KBL406 offers reliable, cost-effective full-wave rectification. Rated at 4A continuous output with proper heatsinking, this rectifier delivers consistent DC power for moderate-load applications across educational, repair, and industrial settings.