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Product Detailed Parameters
- Description：BRIDGE RECT 1PHASE 400V 4A KBU
- Series：-
- Mfr：Taiwan Semiconductor Corporation
- Package：Tray
- Diode Type：Single Phase
- Technology：Standard
- Voltage - Peak Reverse (Max)：400 V
- Current - Average Rectified (Io)：4:00 AM
- Voltage - Forward (Vf) (Max) @ If：1.1 V @ 4 A
- Current - Reverse Leakage @ Vr：5 µA @ 400 V
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：4-SIP, KBU
- Supplier Device Package：KBU
- Grade：-
- Qualification：-
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Overview
The KBU404G T0G is a glass passivated bridge rectifier from the KBU series by Taiwan Semiconductor, designed for printed circuit board mounting. It features a maximum average forward rectified current of 4A and a maximum repetitive peak reverse voltage of 400V. The device supports a peak forward surge current of 150A for an 8.3ms single half sine-wave. Electrical characteristics include a typical junction capacitance of 240pF per leg and a maximum instantaneous forward voltage of 1.1V at 4A. The operating junction temperature range spans from -55°C to +150°C, with a storage temperature range of the same span.
Feature Summary
- Glass passivated junction construction for enhanced reliability
- High case dielectric strength suitable for PCB applications
- Halogen-free molding compound compliant with IEC 61249-2-21
- UL recognized component with flammability rating 94V-0
Applications
- Printed circuit board mounted power supply circuits
- General purpose AC to DC rectification in industrial equipment
- Power adapters and chargers requiring 4A current capacity
Procurement Notes
Verify the specific ordering suffix 'T0G' corresponds to the green compound packing code as documented. Confirm that the part number matches the KBU404G designation for 400V reverse voltage capability. Ensure compliance with RoHS Directive 2011/65/EU requirements during procurement. Check for UL Recognized File # E-326243 validation if safety certification is required for the end application.
Selection Notes
Select this component when a 4A average forward current and 400V peak reverse voltage are required for PCB-mounted designs. Consider the 150A surge current capability for inrush protection scenarios. Verify thermal management needs against the 19°C/W junction-to-ambient thermal resistance. Ensure the -55°C to +150°C operating range meets environmental specifications.
Part Context
This part belongs to the KBU401G through KBU407G family of glass passivated bridge rectifiers manufactured by Taiwan Semiconductor. The series offers varying reverse voltage ratings from 50V to 1000V while maintaining a consistent 4A forward current rating. The KBU404G specifically addresses the 400V blocking requirement within this standardized package form factor.
Replacement Considerations
Direct substitutes must match the 4A current rating, 400V reverse voltage, and KBU package dimensions. Verify equivalent thermal resistance and surge current capabilities. Ensure replacement parts also offer glass passivation and halogen-free construction if those specifications are critical to the design.
FAQ
What is the maximum repetitive peak reverse voltage for the KBU404G?
The maximum repetitive peak reverse voltage (VRRM) for the KBU404G is 400V.
Does the KBU404G meet halogen-free standards?
Yes, the KBU404G uses a green compound molding material that is halogen-free according to the IEC 61249-2-21 definition.
What is the typical junction capacitance per leg?
The typical junction capacitance per leg is 240pF, measured at 1MHz with an applied reverse voltage of 4.0V DC.
