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Product Overview
GBJ3510 provides a 35A cooled current rating and 1000V reverse blocking in a 6KBJ single-phase bridge. It is suited to AC front ends that require more current capacity within the GBJ mechanical format.
The 35A 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 35A current rating.
● 6KBJ four-terminal package with integrated full-wave rectification.
● 1.1V maximum forward voltage at 17.5A and 25°C.
● 350A 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 | 35A at Tc = 110°C; with heatsink |
| Repetitive peak reverse voltage | 1000V |
| Forward voltage | 0.86V typ at IF = 17.5A, Tj = 125°C 1.1V max at IF = 17.5A, Tj = 25°C |
| Terminal to case dielectric strength | 2500VAC; 1 minute |
| Surge current | 350A; 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
● UPS AC input modules.
● Motor-drive front ends.
● Industrial DC-link charging circuits.
35A Capacity in the GBJ Bridge Family
The 35A grade occupies an intermediate position between the 25A and 50A GBJ devices. Review both the operating-current waveform and the 350A non-repetitive surge limit when adapting an existing input-stage design.
Design Notes
The 35A 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 350A 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
Both are 1000 V 6KBJ bridges, but GBJ3510 raises the cooled current rating to 35 A and lists 350 A IFSM. Recalculate loss and inrush instead of substituting on current alone.
The package-to-air path is much less effective than the bolted case path. The headline 35 A rating depends on maintaining the specified case temperature.
Use the 2500 V AC terminal-to-case dielectric rating as one input, but complete the equipment-level insulation, creepage, clearance, and safety review.
Lock the exact GBJ3510 drawing revision, lead length, marking, packaging method, compliance evidence, and any agreed electrical screening.
