Diodes Incorporated KBP204G

Overview

KBP204G from Diodes Incorporated is a 2.0A standard recovery bridge rectifier with 400V peak repetitive reverse voltage (VRRM), 1.1V forward voltage drop at 2A, and 5µA maximum reverse leakage current at 25°C. It features glass-passivated die construction, 1,500VRMS case dielectric strength, and is rated for 65A non-repetitive surge current - used in AC/DC front-end power conversion for industrial power supplies and LED drivers.

For engineers reviewing the KBP204G datasheet, KBP204G pinout, KBP204G application, or KBP204G equivalent, key selection criteria include its 400V blocking rating, thermal resistance (RθJC = 14°C/W), UL recognition (E95060), RoHS-compliant tin-plated leads, and suitability for PCB-mount AC-DC rectification in cost-sensitive, medium-power systems.

Technical Context

The KBP204G integrates four silicon diodes in a single-phase full-wave bridge configuration with standard recovery characteristics (trr not specified, consistent with standard recovery classification). Its glass-passivated junction ensures stable reverse leakage performance across temperature, while the molded KBP package provides mechanical robustness and flame-retardant (UL 94V-0) insulation.

Designed for operation up to +150°C junction temperature, it requires derating to 1.6A under capacitive load per datasheet guidance. Thermal management relies on mounting to a 75mm × 75mm × 1.6mm copper heatsink to maintain RθJC = 14°C/W, enabling reliable conduction at full 2.0A average current when TC ≤ +105°C.

Key Specifications

Pinout & Package

Package: KBP - Molded plastic, UL 94V-0 rated, 1.52g weight, with tin-plated leads solderable per MIL-STD-202 Method 208. Dimensions: 14.5mm × 10.4mm × 4.0mm (L × E × A), 4-pin single-in-line (SIL) layout with 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 DB104, KBP204G delivers optimal balance of 2.0A capacity, compact KBP footprint, UL recognition, and 65A surge tolerance - making it preferred for industrial and commercial AC/DC converters where reliability, certification, and thermal efficiency are prioritized over raw current headroom or minimal size.

Availability

KBP204G is available at Aetrix Electronics and suitable for industrial power supplies, LED drivers, appliance control boards, and line-interactive UPS systems requiring stable component supply, UL-compliant construction, and repeatable thermal performance.

Supply support for KBP204G 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 KBP series belongs to Diodes' standard recovery bridge rectifier product line, engineered for cost-effective, high-reliability AC/DC conversion in industrial, consumer, and lighting applications where UL recognition and surge robustness are critical.

FAQ

What is the maximum operating temperature for KBP204G?

The KBP204G has an operating junction temperature range of –55°C to +150°C. Its 2.0A average current rating is specified at TC = +105°C, meaning the case temperature must be maintained at or below this level under full load. Derating is required above +105°C case temperature, and thermal design must account for RθJC = 14°C/W with appropriate heatsinking.

Is KBP204G suitable for use in automotive applications?

KBP204G is not AEC-Q200 qualified and is not intended for automotive use unless explicitly validated by the customer. Diodes offers separate AEC-Q200-qualified bridge rectifiers (e.g., KBP204G-A) for automotive applications; this standard version lacks PPAP documentation, IATF 16949-specific process controls, and extended temperature validation beyond the industrial grade.

How does the KBP package differ from common DIP-4 or GBU packages?

The KBP package measures 14.5mm × 10.4mm × 4.0mm with a 3.56–4.06mm lead pitch (e), offering a footprint between DIP-4 (smaller) and GBU (larger). It features a single-in-line leadform optimized for wave soldering, UL 94V-0 molding compound, and higher thermal performance (RθJC = 14°C/W) than typical DIP-4 bridges due to improved internal thermal path design.

Does KBP204G require a heatsink in all applications?

A heatsink is not mandatory for KBP204G at low ambient temperatures and light loads, but it is strongly recommended when operating near 2.0A average current or in enclosed environments. With RθJA = 40°C/W, self-heating exceeds safe limits without thermal management; mounting to a 75mm × 75mm × 1.6mm Cu plate achieves RθJC = 14°C/W, enabling full-rated current at TC ≤ +105°C.