SMC Diode Solutions GBJ2004

Overview

GBJ2004 from Diodes Incorporated is a 20A glass passivated single-phase bridge rectifier with 400V peak repetitive reverse voltage (VRRM), 1.05V forward voltage per element at 10A, and 240A non-repetitive surge current rating - designed for AC-to-DC conversion in industrial power supplies and motor control PCBs.

For engineers reviewing the GBJ2004 datasheet, GBJ2004 pinout, GBJ2004 application, or GBJ2004 equivalent, key selection factors include its through-hole GBJ package, 0.8°C/W junction-to-case thermal resistance, 60pF typical capacitance per element, and UL 94V-0 flammability rating for reliable high-current rectification in harsh environments.

Technical Context

The GBJ2004 integrates four silicon diodes in a single-phase full-wave bridge configuration with glass passivated junctions, enabling stable operation up to 150°C junction temperature. Its 400V VRRM supports 280V RMS input lines, and the 240A IFSM rating accommodates brief inrush surges in transformer-coupled supplies.

Thermal performance is defined with reference to a 300 × 300 × 1.6 mm copper heat sink (R_JC = 0.8°C/W); without heatsink, derated average output current drops to ~10A at 110°C case temperature per Fig. 1. Reverse leakage remains ≤500 µA at 125°C under rated DC blocking voltage.

Key Specifications

Pinout & Package

Package: GBJ - Molded plastic case with #6 screw mounting hole, UL 94V-0 rated, lead-free tin-plated leads, 6.6 g mass. Dimensions: A=30.0±0.3 mm, B=20.0±0.3 mm, C=17.5±0.5 mm, D=4.0±0.2 mm, E=7.5±0.2 mm, G=10.0±0.2 mm, H=2.2±0.2 mm, I=1.0±0.1 mm, J=2.5±0.2 mm, K=3.0 mm (45° chamfer), L=4.6±0.2 mm, M=3.6±0.2 mm, N=3.25±0.15 mm, P=2.7±0.2 mm, R=0.7±0.1 mm, S=11.0±0.2 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBJ2004, GBU20J offers smaller size but reduced mechanical stability, while GBPC2004 matches specs in a legacy inline package - GBJ2004 uniquely combines high surge rating, UL recognition, and screw-mount thermal management in one device.

Availability

GBJ2004 is available at Aetrix Electronics and suitable for industrial power supplies, motor drive front-ends, LED streetlight drivers, and welding equipment requiring stable component supply across multi-year production cycles.

Supply support for GBJ2004 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 Americas.

The GBJ series belongs to Diodes' high-current bridge rectifier product line, engineered specifically for ruggedized AC/DC conversion in industrial, commercial, and infrastructure applications demanding long-life reliability and safety certification.

FAQ

What is the maximum allowable case temperature for continuous 20A operation?

The GBJ2004 sustains 20A average forward current only when case temperature (T_C) is maintained at ≤110°C, as specified in the Absolute Maximum Ratings table. This requires mounting on a thermally adequate heatsink - e.g., a 300 × 300 × 1.6 mm Cu plate - to achieve the rated 0.8°C/W junction-to-case thermal resistance.

Can GBJ2004 be used with capacitive input filters without derating?

No - the datasheet explicitly states that for capacitive loads, the average forward current must be derated by 20%. At full 20A rating, this means limiting to 16A when feeding bulk electrolytic capacitors directly after rectification, due to higher peak currents and associated thermal stress on the diode junctions.

Is the GBJ2004 RoHS-compliant and lead-free?

Yes - the GBJ2004 features lead-free tin-plated leads and complies with RoHS Directive 2002/95/EC, including exemptions for high-temperature soldering (Annex Notes 5 and 7). It meets JEDEC Level 1 moisture sensitivity and is qualified per MIL-STD-202 for solderability.

How does the GBJ2004 compare to the GBJ2002 in terms of voltage rating and use cases?

The GBJ2002 has a 200V VRRM rating versus 400V for the GBJ2004, making it suitable only for 140V RMS systems (e.g., 100–120VAC mains), whereas GBJ2004 supports 230–277VAC lines. Both share identical current, thermal, and packaging specs - selection depends strictly on required reverse voltage margin for the target input voltage.