HY Electronic (Cayman) Limited GBPC3508

Overview

GBPC3508 from Diodes Incorporated is a 35A glass-passivated single-phase bridge rectifier with 800V peak repetitive reverse voltage (VRRM), 1.1V forward voltage per element at 17.5A, and 400A non-repetitive surge current rating - designed for AC/DC conversion in industrial power supplies, motor drives, and UPS systems.

For engineers reviewing the GBPC3508 datasheet, GBPC3508 pinout, GBPC3508 application, or GBPC3508 equivalent, key selection factors include thermal resistance (1.2°C/W junction-to-case), case isolation voltage (1500V), and mounting compatibility with #10 screw heatsink interfaces.

Technical Context

This discrete bridge rectifier integrates four silicon diodes in a single molded plastic package with internal metal heatsink, optimized for high-efficiency AC line rectification under resistive or inductive loads at 60Hz. It requires derating by 20% for capacitive loads.

Thermal performance is defined with junction-to-case resistance of 1.2°C/W when mounted on a 220 × 220 × 50 mm aluminum plate heatsink; total capacitance is 300 pF per element at 1 MHz and 4V reverse bias.

Key Specifications

Pinout & Package

GBPC3508 uses the GBPC through-hole package with four terminals: two AC inputs (marked ~), one positive DC output (+), and one negative DC output (–). Mounting is via a central #10 screw hole (5.08–5.59 mm diameter) for mechanical and thermal attachment to heatsinks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBPC3508, the Vishay alternative offers identical thermal and electrical behavior with alternate certification, while the ON Semiconductor version trades minor efficiency and thermal margin for broader qualification scope in regulated industries.

Availability

GBPC3508 is available at Aetrix Electronics and suitable for industrial power supplies, motor drives, uninterruptible power systems, and welding equipment requiring stable component supply and long-lifecycle availability.

Supply support for GBPC3508 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 California and operating wafer fabs and assembly facilities across Asia.

The GBPC series targets high-reliability AC/DC front-end conversion, emphasizing thermal robustness, surge resilience, and safety certification for industrial and infrastructure applications.

FAQ

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

GBPC3508 delivers rated 35A average output current only when case temperature (TC) is maintained at ≤50°C, as specified in the derating curve. At higher temperatures, current must be reduced linearly - e.g., to ~25A at TC = 100°C - to prevent junction overheating beyond 150°C.

Can GBPC3508 be used with capacitive loads without derating?

No. The datasheet explicitly requires 20% current derating for capacitive loads due to high inrush current and elevated RMS current stress. For example, 35A rating becomes 28A maximum when feeding bulk capacitor input filters without active inrush limiting.

Is the GBPC3508 electrically isolated from its metal base?

Yes - the device provides 1500 V isolation between all terminals and the case/metal base, verified per UL Recognized Component File E94661. This allows safe mounting to grounded heatsinks without additional insulating hardware.

Does GBPC3508 support lead-free soldering processes?

Yes - its silver-plated terminals comply with MIL-STD-202, Method 208, and are qualified for lead-free reflow profiles up to 260°C peak temperature, consistent with J-STD-020C Level 1 moisture sensitivity classification.