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Product Overview
GBJ5010 is a 50A 1000V single-phase bridge rectifier in 6KBJ. Its 450A non-repetitive surge rating provides a defined short-pulse reference for high-current AC input assemblies.
The 50A operating point requires a heatsink and Tc = 110°C. Two diode junctions conduct in each rectified current path, so bridge-loss calculations must include both forward drops.
Key Features
● 1000V repetitive peak reverse voltage with a 50A current rating.
● 6KBJ four-terminal package with integrated full-wave rectification.
● 1.1V maximum forward voltage at 25A and 25°C.
● 450A non-repetitive surge current for a 8.3ms pulse.
Key Specifications
| Parameter | Value and conditions |
| Configuration / package | Single-phase full-wave bridge / 6KBJ |
| Forward current | 50A at Tc = 110°C; with heatsink |
| Repetitive peak reverse voltage | 1000V |
| Forward voltage | 0.88V typ at IF = 25A, Tj = 125°C 1.1V max at IF = 25A, Tj = 25°C |
| Terminal to case dielectric strength | 2500VAC; 1 minute |
| Surge current | 450A; non-repetitive, t = 8.3ms |
| Junction to case thermal resistance | 1.0°C/W |
| Junction temperature range | −55°C to +150°C |
Current capability depends on case temperature and cooling. Use the datasheet derating curve when determining operating current.
Electrical Configuration and Pinout
The two terminals marked ~ accept the AC input. The + and − terminals provide the rectified DC output. Follow the polarity markings and the package drawing when laying out the PCB; GBJ and GBU lead arrangements differ.
Figure 1. Single-phase full-wave bridge circuit. The terminal symbols correspond to the package markings.
| Connection | Function |
| Terminal marked + | Positive rectified DC output |
| First terminal marked ~ | AC input |
| Second terminal marked ~ | AC input |
| Terminal marked − | Negative rectified DC output |
Typical Applications
● High-output industrial power supplies.
● Welding power-supply input stages.
● Large single-phase DC-link front ends.
50A Bridge Rectification with Controlled Cooling
The 50A operating class requires attention to terminals, conductors and PCB joints as well as the heatsink. Evaluate the full input-current waveform and both conducting junctions when calculating bridge loss.
Design Notes
The 50A rating requires a heatsink at Tc = 110°C. Include both conducting junctions, the input-current waveform and capacitor-charging pulses in the loss and thermal calculations.
The 2500VAC value is a one-minute terminal-to-case dielectric test. It does not provide galvanic isolation between AC input and DC output. Follow the mounting drawing and include the external thermal interface in the cooling calculation.
The 450A IFSM specification applies to a non-repetitive 8.3ms event. Review inrush limiting, restart conditions, terminal temperature and conductor capacity for the complete input stage.
FAQ
No. The 50 A rating is tied to Tc = 110°C with a heatsink; free-air current is listed as 5.2 A at 25°C.
Use the instantaneous current waveform and two conducting diode drops. The datasheet’s 0.88 V typical point is useful for estimation, but worst-case thermal design should use appropriate maximum data and curves.
The package family is similar, but current, surge, loss, and possibly mechanical tolerances differ. Verify the exact drawing and recalculate the system.
Measure case and junction-related temperatures, inrush waveform, terminal heating, thermal-interface pressure, and protection behavior at line and load extremes.
