Fairchild KBU8A - KBU8M Bridge Rectifiers Data Sheet
Summary
The KBU8A to KBU8M series are high-reliability Bridge Rectifiers designed for stable AC-to-DC power conversion in Printed Circuit Board (PCB) applications. This comprehensive technical manual provides electrical specifications, thermal limits, and performance curves, making it an essential resource. It is tailored for electrical engineers, circuit designers, and electronics manufacturers who require components with certified, high surge current capacity and guaranteed reliability for their next project.
Page 1 Text Content
8A - K 8M ridge R ectifiers
June 2010
KBU8A - KBU8M Bridge Rectifiers Features High surge current capability. Reliable construction technique. Ideal for printed circuit board. UL Certificate # E326243.
Absolute Maximum Ratings* TA= 25°C unless otherwise noted
Value
Symbol Parameter Units
VRRM Maximum Repetitive Reverse Voltage
VRMS Maximum RMS Bridge Input Voltage VR DC Reverse Voltage (Rated VR) IF(AV) Average Rectified Forward Current, @ TA= 50°C 8.0 IFSM Non-repetitive Peak Forward Surge Current TSTG Storage Temperature Range -55 to +150 °C TJ Operating Junction Temperature -55 to +150 °C
* These ratings are limiting values above which the serviceability of any semiconductor device may be impaired.
Thermal Characteristics Symbol Parameter Value Units PD Power Dissipation 6.9
RθJA Thermal Resistance, Junction to Ambient,* per leg °C/W RθJL Thermal Resistance, Junction to Lead,* per leg 3.0 °C/W
* Device mounted on PCB with 0.375 " (9.5 mm) lead length and 0.5 x 0.5" (13 x 13 mm) copper pads.
Electrical Characteristics TA= 25°C unless otherwise noted Symbol Parameter Value Units VF Forward Voltage, per bridge @ 8.0 A 1.0
IR Reverse Current, total bridge @ rated VR TA= 25°C µA
TA= 100°C µA
© 2010 Fairchild Semiconductor Corporation www.fairchildsemi.com KBU8A - KBU8M Rev. C1
Page Summary Contents For Fairchild KBU8A - KBU8M Bridge Rectifiers Data Sheet
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 3 |
| File Size | 164.64 KB |
| Published | July 07, 2026 |
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Frequently Asked Questions
What are the recommended mounting requirements for thermal performance?
Thermal resistance (θJA) and recommends a PCB with 0.375” lead length and 0.5 x 0.5” copper pads.
Are these rectifiers safe for life support systems?
No, Fairchild’s products require explicit written approval for use in life support devices or systems.
What happens if I buy a part from an unauthorized source?
Fairchild will not provide any warranty coverage or assistance for parts bought from Unauthorized Sources.
What is the maximum permissible junction temperature?
The Operating Junction Temperature (Tj) range is -55 to +150 °C.