Diodes Incorporated GBP408

Overview

GBP408 from Diodes Incorporated is a 4A standard recovery bridge rectifier with 800V maximum repetitive peak reverse voltage (VRRM), 1.0V forward voltage at 2.0A, and 5µA reverse leakage current at 25°C. It features glass-passivated die construction, UL 94V-0 plastic package, and is rated for operation from –55°C to +150°C junction temperature - commonly deployed in AC/DC power supplies for industrial control panels.

For engineers reviewing the GBP408 datasheet, GBP408 pinout, GBP408 application, or GBP408 equivalent, key selection criteria include its 800V blocking capability, thermal resistance of 7.5°C/W (junction-to-case), surge rating of 135A (8.3ms), PCB-mountable GBP package, and compliance with RoHS, halogen-free, and AEC-Q200-ready manufacturing standards.

Technical Context

This device integrates four silicon diodes in a single-phase full-wave bridge configuration, enabling AC-to-DC conversion without external interconnection. Its standard recovery characteristic (trr not specified but typical for standard recovery bridges >500ns) supports line-frequency (50/60Hz) rectification rather than high-frequency switching applications.

The GBP408 operates with a maximum average forward current of 4.0A at TC = +90°C with heatsink, derating to 2.1A without heatsink. Thermal performance relies on low RθJC (7.5°C/W) when mounted on a 50mm × 50mm × 2mm copper heatsink, and its junction capacitance is 40pF at 1MHz/4V reverse bias.

Key Specifications

Pinout & Package

Package: GBP - molded plastic, 4-terminal single-phase bridge rectifier with integrated anode/cathode terminals and polarity symbol molded on body. Dimensions: 14.5mm × 10.4mm × 3.1mm (L × E × A), weight ≈1.33g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU8K and KBP308G, GBP408 offers the lowest forward voltage and best thermal resistance in its class, making it preferred for space-constrained, thermally demanding industrial power supplies where efficiency and reliability are prioritized over marginal cost savings.

Availability

GBP408 is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, appliance motor control boards, LED streetlight drivers, and uninterruptible power supply (UPS) charging circuits requiring stable component supply and long-term lifecycle support.

Supply support for GBP408 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 GBP series belongs to Diodes' standard recovery bridge rectifier product line, engineered for cost-effective, high-reliability AC/DC conversion in industrial, appliance, and lighting applications where switching frequency is limited to line frequency.

FAQ

What is the maximum junction temperature for GBP408?

The GBP408 has a specified operating junction temperature range of –55°C to +150°C. This rating is validated per JEDEC standards and reflects the silicon die's thermal limit under steady-state and transient conditions. Derating curves in the datasheet confirm 4.0A average current is sustainable only when case temperature is held at or below +90°C with heatsink.

Can GBP408 be used without a heatsink?

Yes - GBP408 can operate without a heatsink, but its average forward current rating drops to 2.1A at TC = +90°C. In practice, this restricts use to low-duty-cycle or low-power applications (e.g., <15W output). For continuous 4A operation, a 50mm × 50mm × 2mm copper heatsink is required to maintain RθJC = 7.5°C/W and prevent thermal runaway.

Is GBP408 compliant with automotive qualification standards?

GBP408 is manufactured in IATF 16949-certified facilities and supports PPAP documentation, but it is not individually qualified to AEC-Q101. Diodes states that automotive-grade versions require specific change control and qualification - users needing AEC-Q101 compliance must request the designated automotive variant (e.g., GBP408Q) and engage their local Diodes representative.

How does GBP408 differ from GBP406 and GBP410?

GBP406, GBP408, and GBP410 share identical package, thermal characteristics, forward voltage (1.0V), and surge ratings. Their sole difference is maximum repetitive peak reverse voltage: 600V, 800V, and 1000V respectively. This allows designers to select the appropriate voltage grade for input AC RMS level and safety margin requirements without changing layout or thermal design.