KBP04G

Overview

The KBP04G is a single-phase standard recovery bridge rectifier manufactured by Diodes Incorporated. It provides an average rectified output current of 1.5 A at a case temperature of +105°C and supports a maximum repetitive peak reverse voltage of 400 V. The device features a forward voltage drop of 1.1 V maximum at the rated current and exhibits a low reverse leakage current of 5 µA at +25°C, rising to 500 µA at +125°C. It withstands a non-repetitive peak forward surge current of 40 A for an 8.3 ms half-sine wave. The component operates within a junction temperature range of -55°C to +150°C and utilizes a KBP through-hole package.

Feature Summary

• Glass passivated die construction ensures high reliability and stability under varying thermal conditions.
• High case dielectric strength rating of 1500 VRMS provides robust electrical isolation.
• Low reverse leakage current minimizes power loss and heat generation during operation.
• Surge overload capability allows the device to handle transient current spikes up to 40 A.

Applications

• Printed circuit board applications requiring compact single-phase rectification
• General-purpose AC to DC conversion in consumer electronics
• Power supply units with moderate current requirements

Procurement Notes

Verify that the ordered part number matches the specific voltage rating required for the application, as the KBP series includes multiple variants with different peak reverse voltages. Confirm compliance with RoHS directives if environmental regulations apply to the manufacturing process. Ensure the supplier provides documentation confirming the lead-free finish and halogen-free status as specified in the manufacturer's quality definitions.

Selection Notes

Select this component when a 400 V blocking voltage and 1.5 A continuous current capacity are sufficient for the design. Consider the thermal resistance of 18 °C/W per element when designing heatsinking or PCB copper areas. Derate the output current by 20% if the load is capacitive rather than resistive or inductive to prevent exceeding the surge current limits.

Part Context

The KBP04G belongs to the KBP005G–KBP10G family of 1.5 A standard recovery bridge rectifiers from Diodes Incorporated. This series shares identical mechanical dimensions and electrical characteristics regarding current and voltage drop, differing primarily in their maximum repetitive peak reverse voltage ratings which range from 50 V to 1000 V across the lineup.

Replacement Considerations

Direct substitutes within the same family include KBP06G (600V) and KBP02G (200V), provided the voltage rating meets or exceeds the circuit requirements. Other manufacturers producing KBP-style 1.5A bridge rectifiers may be compatible if they match the pinout, thermal resistance, and electrical specifications defined in the datasheet.

FAQ

What is the maximum operating junction temperature for the KBP04G?

The maximum operating junction temperature is +150°C.

How does the reverse leakage current change with temperature?

The reverse leakage current increases from a maximum of 5 µA at +25°C to 500 µA at +125°C.

Is the KBP04G suitable for capacitive loads?

Yes, but the average rectified output current must be derated by 20% when used with capacitive loads.