Diodes Incorporated KBJ410G

Overview

KBJ410G from Diodes Incorporated is a 4.0A, 1000V standard recovery bridge rectifier in KBJ through-hole package, featuring 1.0V max forward voltage at 2.0A, 5.0µA max reverse leakage at 25°C, 120A peak surge rating, and UL 94V-0 molded plastic housing. It serves as AC-to-DC front-end rectification in offline power supplies for industrial controls and lighting ballasts.

For engineers reviewing the KBJ410G datasheet, KBJ410G pinout, KBJ410G application, or KBJ410G equivalent, key selection criteria include VRRM=1000V, IF(AV)=4.0A with heatsink, RθJC=5.5°C/W, IR=5.0µA @25°C, and compliance with RoHS and UL E95060 recognition - all critical for reliable mains-input rectification design.

Technical Context

This single-phase bridge rectifier integrates four silicon diodes in a monolithic KBJ package with glass-passivated junctions, enabling stable operation from –55°C to +150°C. Its 1500VRMS dielectric strength between case and terminals ensures safety isolation in Class II AC/DC converters.

The device delivers 4.0A average output current when mounted on a 75mm × 75mm × 1.6mm aluminum heatsink, with thermal resistance of 5.5°C/W (junction-to-case). Its 40pF typical junction capacitance at 1MHz/4V reverse bias supports predictable EMI behavior in 50/60Hz line-frequency applications.

Key Specifications

Pinout & Package

Package: KBJ molded plastic through-hole package (UL 94V-0), 4.6g weight, tin-plated leads, #6 screw mounting, 5.0 in-lbs max torque. Polarity marked on body.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bridge rectifier applications.

Compared with GBU4K and W04M, KBJ410G offers superior reverse leakage (5.0µA vs. 10µA) and UL recognition - critical for energy-efficient, safety-certified industrial power supplies requiring long-term reliability.

Availability

KBJ410G is available at Aetrix Electronics and suitable for industrial motor drives, LED street lighting power supplies, programmable logic controller (PLC) power modules, and AC-DC adapters for industrial sensors requiring stable component supply across extended production lifecycles.

Supply support for KBJ410G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The KBJ series belongs to Diodes' standard recovery bridge rectifier product line, engineered for cost-effective, high-reliability AC/DC conversion in industrial, lighting, and appliance power supplies.

FAQ

What is the maximum operating temperature for KBJ410G?

KBJ410G has a specified operating junction temperature range of –55°C to +150°C. Its thermal resistance (RθJC = 5.5°C/W) requires proper heatsinking to maintain TJ ≤ 150°C under full 4.0A load. Ambient temperature limits depend on PCB layout, airflow, and heatsink performance - derating curves are provided in DS21206 Rev. 10-2.

Is KBJ410G suitable for use in automotive applications?

KBJ410G is not AEC-Q101 qualified and lacks PPAP documentation or IATF 16949-specific change control. While it operates within automotive temperature ranges, Diodes explicitly states that automotive-grade variants require direct consultation with their representatives - this part is intended for industrial, commercial, and lighting applications only.

Does KBJ410G require a heatsink for 4.0A operation?

Yes. The 4.0A average current rating (IF(AV)) is specified only when mounted on a 75mm × 75mm × 1.6mm aluminum plate heatsink. Without forced cooling or adequate copper area, continuous operation above ~1.5A risks exceeding TJ = 150°C. Derating is mandatory for smaller PCB copper pours or still-air conditions.

How does the glass passivation benefit KBJ410G in real-world use?

Glass passivation protects the silicon PN junction from moisture ingress, ionic contamination, and surface charge accumulation - directly improving long-term parameter stability and reducing early-life failure rates in humid, dusty, or chemically exposed environments such as factory floors or outdoor lighting enclosures.