Taiwan Semiconductor Corporation KBU1002G T0

Overview

KBU1002G from Taiwan Semiconductor is a 10A, 100V glass-passivated single-phase bridge rectifier in KBU package, featuring 200A surge rating, 1.1V max forward voltage at 10A/25°C, and <5µA reverse leakage at rated voltage - deployed in AC-DC front-end stages of compact switching power supplies.

For engineers reviewing the KBU1002G datasheet, KBU1002G pinout, KBU1002G application, or KBU1002G equivalent, key selection criteria include peak repetitive reverse voltage (100V), thermal resistance (2.2°C/W junction-to-case), UL recognition (E-326243), RoHS compliance, and JESD201 Class 1A whisker resistance for high-reliability PCB assembly.

Technical Context

The KBU1002G integrates four silicon diodes in a single-phase full-wave bridge configuration with quad-terminal layout (AC1, AC2, +, –), enabling direct AC input rectification without external interconnects. Its glass-passivated junction ensures stable reverse characteristics across -55°C to +150°C operating range.

Thermal performance is defined by R_θJC = 2.2°C/W and R_θJA = 25°C/W, supporting conduction-cooled mounting on FR-4 PCBs with minimal heatsinking. The device meets UL 94V-0 flammability and J-STD-002 solderability standards.

Key Specifications

Pinout & Package

Package: KBU - molded plastic case with matte tin-plated leads, UL 94V-0 rated, 7.2g weight, designed for through-hole PCB mounting and mechanical torque limit of 0.56 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU10K-E3/51 and DF08MA, the KBU1002G offers superior surge robustness (200A) and lower thermal resistance (2.2°C/W), making it optimal for compact, high-reliability AC-DC front ends where board space and thermal headroom are limited.

Availability

KBU1002G is available at Aetrix Electronics and suitable for switching mode power supplies, LED lighting drivers, and USB-C wall adapters requiring stable component supply, consistent lot-to-lot parametric performance, and full traceability.

Supply support for KBU1002G 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving industrial, computing, and consumer markets since 1979.

The KBU1002G belongs to TSC's standard bridge rectifier product line, engineered for high-surge, high-reliability AC-DC conversion in cost-sensitive yet thermally demanding applications such as offline power supplies and lighting systems.

FAQ

What is the maximum repetitive peak reverse voltage (VRRM) rating for KBU1002G?

The KBU1002G has a VRRM rating of 100 V, meaning it can safely block up to 100 V of repetitive reverse voltage across its terminals. This corresponds to a 70 V_RMS AC input capability and is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version J2103). Exceeding this voltage risks avalanche breakdown and permanent damage to the KBU1002G.

Does KBU1002G support lead-free soldering processes?

Yes, the KBU1002G features matte tin-plated leads compliant with J-STD-002 for solderability and is RoHS compliant, fully supporting Pb-free reflow and wave soldering. Its terminals pass JESD201 Class 1A whisker testing, ensuring long-term reliability in lead-free assemblies without tin whisker formation - a critical requirement for automotive and industrial deployments of the KBU1002G.

What is the thermal resistance from junction to case (RθJC) for KBU1002G?

The KBU1002G has a specified RθJC of 2.2°C/W, measured under standard test conditions. This low value enables efficient heat transfer from the silicon die to the PCB pad or external heatsink, allowing sustained 10A operation without forced air cooling. This parameter is directly used in thermal design calculations for the KBU1002G in high-density power supplies.

Is KBU1002G UL recognized, and what is its file number?

Yes, the KBU1002G is UL Recognized under file number E-326243. This certification applies to the entire KBU1001G–KBU1007G family and validates construction, flammability (UL 94V-0), and electrical safety for use in end equipment. Engineers may cite this UL file when submitting KBU1002G-based designs for regulatory approval.

How does the forward voltage (VF) of KBU1002G compare at different current levels?

The KBU1002G specifies VF ≤1.0 V at 5A and ≤1.1 V at 10A, both measured at TJ = 25°C. These values reflect typical conduction losses under real load conditions: at full 10A, the KBU1002G dissipates up to ~11W, directly impacting thermal design. The datasheet confirms these are maximum limits - actual VF is typically lower and decreases slightly with rising junction temperature.