GeneSiC Semiconductor GBPC3508W

Overview

GBPC3508W from Diodes Incorporated is a 35A glass-passivated single-phase bridge rectifier with 800V peak repetitive reverse voltage (VRRM), 1.1V forward voltage at 17.5A per diode, and 400A non-repetitive surge current rating; it features wire leads ('W' suffix), metal base for heatsink mounting, and UL recognition (E94661) for industrial AC/DC power supplies.

For engineers reviewing the GBPC3508W datasheet, GBPC3508W pinout, GBPC3508W application, or GBPC3508W equivalent, key selection criteria include thermal resistance (1.2°C/W junction-to-case), case isolation voltage (1500V), RMS reverse voltage rating (560V), and derating behavior under capacitive loads.

Technical Context

This bridge rectifier integrates four silicon diodes in a single molded plastic package with internal heatsink and metal baseplate, designed for direct-mounting via #10 screw to external heatsinks. Its glass-passivated die construction ensures low reverse leakage (5.0mA @ 25°C, 500mA @ 125°C) and stable performance across -65°C to +150°C.

It operates under single-phase 60Hz line inputs with resistive or inductive loads; for capacitive loads, average output current must be derated by 20%. Total capacitance is 300pF per element at 1MHz and 4V reverse bias, supporting EMI-sensitive applications where parasitic capacitance impacts filtering.

Key Specifications

Pinout & Package

GBPC3508W uses the GBPC-W package: molded plastic body with integrated metal baseplate, wire leads (not Faston), and mounting hole for #10 screw. Dimensions: 28.3–28.8 mm (L) × 7.4–8.25 mm (W) × 16.1–17.1 mm (H); weight ≈14 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU8K, GBPC3508W offers lower thermal resistance and mechanical mounting stability; versus GBPC3508, its wire leads provide greater routing flexibility and solder-joint reliability in vibration-prone environments.

Availability

GBPC3508W is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, motor drive front-end rectification, and medical auxiliary power systems requiring stable component supply, long-lifecycle support, and UL-recognized safety compliance.

Supply support for GBPC3508W 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, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The GBPC series targets high-current, high-voltage AC/DC conversion applications, emphasizing thermal performance, safety certification, and ruggedized packaging for demanding power electronics environments.

FAQ

What is the maximum allowable case temperature for continuous 35A operation?

The datasheet specifies IO = 35A at TC = 50°C. Operation above this requires derating per Figure 1: at TC = 75°C, max IO drops to ~25A; at TC = 100°C, it falls to ~15A. Sustained 35A demands active heatsinking to maintain case temperature ≤50°C.

Can GBPC3508W be used with capacitive input filters without derating?

No - the datasheet explicitly requires 20% derating of IO for capacitive loads. At TC = 50°C, usable current reduces from 35A to 28A to prevent overheating caused by high peak charging currents and increased RMS current stress.

Is the 1500V isolation rating tested per UL standard?

Yes - the device is UL Recognized under File E94661, confirming dielectric withstanding voltage testing per UL 60950-1 and UL 62368-1, including 1500V RMS for 1 minute between case and all terminals, with no flashover or breakdown.

Does the 'W' suffix affect electrical performance or thermal rating?

No - the 'W' suffix denotes wire leads instead of Faston terminals; all electrical parameters (VRRM, IO, VFM, RθJC, etc.) and thermal performance are identical between GBPC3508 and GBPC3508W. Only mechanical mounting and termination differ.