Diodes Incorporated KBP208G

Overview

KBP208G from Diodes Incorporated is a 2.0A, 800V peak repetitive reverse voltage (VRRM) standard recovery bridge rectifier in KBP package, featuring 1.1V max forward voltage at 2A, 5µA max reverse leakage at 25°C, 65A non-repetitive surge rating, and glass-passivated die construction for PCB-level AC/DC front-end rectification in industrial power supplies.

For engineers reviewing the KBP208G datasheet, KBP208G pinout, KBP208G application, or KBP208G equivalent, key selection criteria include VRRM derating for line-voltage transients, thermal resistance (RθJC = 14°C/W) for heatsink-limited designs, IFSM capability for inrush tolerance, and UL recognition (E95060) for safety-compliant end equipment.

Technical Context

This single-phase, full-wave bridge rectifier integrates four silicon diodes in a common anode–common cathode configuration, enabling AC-to-DC conversion without external interconnects. Its standard recovery characteristic (trr not specified, consistent with non-fast-recovery classification) supports 50/60Hz line-frequency operation with minimal switching loss trade-off.

Designed for mounting on copper heatsinks (75mm × 75mm × 1.6mm), it delivers 2.0A average output current at TC = +105°C, with thermal performance governed by RθJC = 14°C/W and RθJA = 40°C/W. Reverse blocking is validated up to 800V VRRM, with IR ≤ 5µA at 25°C and ≤ 500µA at 125°C.

Key Specifications

Pinout & Package

Package: KBP molded plastic case (UL 94V-0), 4-terminal single-in-line (SIP) configuration with tin-plated leads. Dimensions: 14.5mm × 10.4mm × 4.0mm (L × W × H), weight ≈1.52g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU8K and W08M, KBP208G offers balanced performance: lower cost than GBU8K while delivering superior thermal resistance (14 vs. 16°C/W) and tighter leakage (5 vs. 10µA), making it optimal for cost-sensitive industrial power supplies where 65A surge suffices.

Availability

KBP208G is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, LED driver input stages, and appliance motor control boards requiring stable component supply, RoHS compliance, and UL recognition.

Supply support for KBP208G 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 the Americas.

The KBP series targets cost-effective, high-reliability AC/DC front-end rectification for industrial, consumer, and lighting applications-emphasizing robust surge handling, safety certification, and thermal efficiency in compact SIP packages.

FAQ

What is the maximum operating temperature for KBP208G?

KBP208G has an operating junction temperature range of –55°C to +150°C. The device delivers its rated 2.0A average output current only when case temperature is maintained at +105°C or below, as defined in the derating curve. Exceeding this case temperature requires proportional current reduction per Figure 1 in DS21205.

Is KBP208G suitable for high-frequency switching applications?

No-KBP208G is a standard recovery bridge rectifier with no specified reverse recovery time (trr), indicating it is optimized for 50/60Hz line-frequency operation. Using it in high-frequency SMPS (>20kHz) would cause excessive switching losses and overheating due to slow carrier recombination; fast- or ultrafast-recovery alternatives are required.

Does KBP208G require a heatsink in typical applications?

A heatsink is recommended when IO exceeds ~1.2A at ambient temperatures above 40°C, due to RθJA = 40°C/W. At full 2.0A load and TA = 50°C, junction temperature would exceed 150°C without thermal management. Mounting on ≥75mm² copper area or adding a small clip-on heatsink ensures reliable operation within spec.

How is polarity marked on the KBP208G package?

Polarity is marked on the body of the KBP208G: a white band identifies the DC+ (positive) output terminal, while the opposite end is DC–. The two center pins are the AC input terminals (~), with no functional distinction between them-both serve as AC inputs to the internal bridge.