onsemi GBPC2506

Overview

GBPC2506 from Diodes Incorporated is a 25A glass passivated single-phase bridge rectifier with 600V peak repetitive reverse voltage (VRRM), 1.1V forward voltage per element at 12.5A, 300A non-repetitive surge rating, and metal base for heatsink mounting-used in industrial AC/DC power supplies, motor drive front-ends, and welding equipment input stages.

For engineers reviewing the GBPC2506 datasheet, GBPC2506 pinout, GBPC2506 application, or GBPC2506 equivalent, key selection criteria include thermal resistance (1.3°C/W junction-to-case), case isolation voltage (1500V), UL recognition (E94661), RoHS compliance, and through-hole screw-mount mechanical interface for high-reliability power conversion.

Technical Context

This discrete bridge rectifier integrates four silicon diodes in a single molded plastic package with internal heatsink, configured as a full-wave Graetz bridge. It operates under single-phase, half-wave 60Hz resistive/inductive loads, with derating required for capacitive loads (−20% current).

Thermal performance relies on direct metal-base mounting to an external heatsink (e.g., 220 × 220 × 50 mm Al plate); junction temperature must remain within −65°C to +150°C, and case temperature derating begins above 60°C per Fig. 1.

Key Specifications

Pinout & Package

GBPC2506 uses the GBPC through-hole package: 4-terminal, metal-base square body with #10 screw mounting hole (5.08–5.59 mm diameter), faston terminals (no "W" suffix), and polarity marked on case: two AC inputs (diagonally opposite), one (+) DC output, one (−) DC output.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBPC2506, GBJ2506 trades mechanical robustness and thermal performance for compactness, while KBPC2506 offers second-source availability with a 0.2°C/W higher thermal resistance-requiring heatsink validation in thermally demanding deployments.

Availability

GBPC2506 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, motor drive input stages, and welding equipment requiring stable component supply and long-lifecycle support.

Supply support for GBPC2506 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, serving industrial, computing, consumer, and communications markets.

The GBPC series belongs to Diodes' high-current bridge rectifier product line, engineered for ruggedized AC/DC conversion in high-temperature, high-surge industrial environments.

FAQ

What is the maximum recommended case temperature for continuous operation of GBPC2506?

The datasheet specifies IO = 25A only at TC = 60°C. Derating begins immediately above that point, reaching zero current at TC = 125°C (per Fig. 1). For reliable 25A operation, active heatsinking must maintain case temperature ≤60°C-typically requiring ≥0.1 m² aluminum heatsink with forced air or ≥0.3 m² passive surface area.

Can GBPC2506 be used with capacitive loads such as bulk electrolytic input filters?

Yes, but with mandatory 20% current derating per the datasheet. Capacitive-input filters cause high peak currents and increased RMS heating; using GBPC2506 at full 25A with such loads risks thermal runaway. Designers must verify junction temperature using I²t and RθJC, especially during cold-start inrush.

Does GBPC2506 require a heatsink for 25A operation?

Yes-absolutely. The 1.3°C/W RθJC assumes direct metal-base mounting to a substantial heatsink. Without it, even brief 25A operation exceeds the 150°C max junction temperature. The metal base is not self-cooling; it is a thermal interface designed exclusively for external heatsink attachment via #10 screw.

Is GBPC2506 obsolete, and what is the official replacement?

Per Diodes' DS21209 Rev. 10, GBPC2506 is marked "OBSOLETE PLEASE USE GBJ25005 – GBJ2510". However, GBPC2506 remains actively manufactured and stocked by Diodes and major distributors as of Q2 2024; the GBJ series is a pin-compatible alternative with different packaging-not a mandatory replacement.