onsemi GBPC3502

Overview

GBPC3502 from Diodes Incorporated is a 35A glass-passivated single-phase bridge rectifier with 200V peak repetitive reverse voltage (VRRM), 1.1V forward voltage at 17.5A per element, and 400A non-repetitive surge current rating; used in AC/DC power supplies for industrial motor drives requiring high thermal reliability and UL-recognized isolation.

For engineers reviewing the GBPC3502 datasheet, GBPC3502 pinout, GBPC3502 application, or GBPC3502 equivalent, key selection criteria include case-mounted thermal resistance (1.2°C/W), 1500V case-to-terminal isolation, RoHS-compliant silver-plated terminals, and compatibility with #10 screw mounting on heatsinks.

Technical Context

This device integrates four silicon junction diodes in a single molded plastic package with internal metal heatsink, configured as a full-wave bridge to convert AC input (e.g., 140V RMS) to unidirectional DC output. It operates across –65°C to +150°C and requires external heatsinking for sustained 35A average current at TC = 50°C.

The glass-passivated die construction ensures low reverse leakage (5.0mA @ 25°C, 500mA @ 125°C) and stable performance under surge conditions up to 400A (8.3ms half-sine). Total capacitance is 300pF at 1MHz/4V reverse bias, limiting high-frequency noise coupling.

Key Specifications

Pinout & Package

Package: GBPC (standard) - Molded plastic case with integrated metal baseplate, UL 94V-0 rated, designed for through-hole mounting via #10 screw and heatsink contact. Dimensions: 28.3–28.8 mm (L) × 7.4–8.25 mm (W) × 16.1–17.1 mm (H); weight ≈20 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU3K, GBPC3502 delivers 11.7× higher average current and certified isolation-critical for mains-connected systems; versus ON Semi's GBPC3502, it offers identical performance but distinct manufacturing lineage and qualification documentation paths.

Availability

GBPC3502 is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies, medical AC/DC adapters, and welding equipment power stages requiring stable component supply, long-lifecycle support, and UL-recognized safety compliance.

Supply support for GBPC3502 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 and manufacturing operations across Asia and the US.

The GBPC series belongs to Diodes' high-current bridge rectifier product line, engineered specifically for robust AC/DC conversion in industrial, medical, and infrastructure power systems where thermal stability, safety certification, and surge resilience are mandatory.

FAQ

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

The datasheet specifies IO = 35A at TC = 50°C. Exceeding this case temperature requires derating per Figure 1: at TC = 75°C, IO drops to ~25A; at TC = 100°C, it falls below 15A. Sustained 35A operation mandates active or large passive heatsinking to maintain TC ≤50°C.

Can GBPC3502 be used in capacitive-input filter configurations?

No - the datasheet explicitly states "For capacitive load, derate current by 20%." Using it directly with bulk capacitors without inrush limiting risks exceeding IFSM during startup. A thermistor or active inrush circuit is required to limit peak charging current below 400A.

Is the GBPC3502 RoHS compliant and lead-free?

Yes - the device features lead-free finish and complies with RoHS Directive 2011/65/EU, including exemptions for glass and high-temperature solder per EU Annex Notes 5 and 7. This is confirmed in Note 4 of the datasheet and supported by Diodes' AP2008 packaging documentation.

What is the recommended mounting torque for the #10 screw terminal?

The datasheet specifies a maximum mounting torque of 8.0 inch-pounds (0.90 N·m). Exceeding this value may deform the plastic case or compromise internal die attachment integrity. Use a calibrated torque screwdriver and ensure flat, clean heatsink surface contact for optimal thermal transfer.