KBU4B-E4/51

Overview

The KBU4B-E4/51 is a single-phase bridge rectifier from Vishay's KBU4 series, designed for through-hole mounting. It features a peak repetitive reverse voltage (Vrrm) of 100 V and an average forward rectified current (If) of 4 A per leg. The component supports a peak non-repetitive forward surge current (Ifsm) of 200 A. Electrical characteristics include a maximum forward voltage drop (Vf) of 1 V at rated current and a low reverse leakage current (Ir) of 5 μA. It operates within a junction temperature range of -50°C to +150°C and utilizes the KBU package with dimensions of 23.7 mm in length and 19.3 mm in height.

Feature Summary

• Robust construction capable of handling high surge currents up to 200 A for transient protection.

Applications

• General-purpose AC to DC power supply conversion circuits.

Procurement Notes

Verify the specific suffix /51 against official Vishay documentation to confirm tape-and-reel packaging specifications. Ensure the selected variant matches the required 100 V rating and 4 A current capacity for the target design. Cross-reference the manufacturer part number with authorized distributors to confirm current production status and availability.

Selection Notes

Select this component when a 100 V reverse voltage rating and 4 A continuous current are required in a compact KBU package. Consider the 1 V forward voltage drop for thermal management calculations. Verify that the through-hole mounting style and operating temperature range meet the system's environmental constraints.

Part Context

This device belongs to the Vishay KBU4 series of single-phase bridge rectifiers. The series offers various voltage ratings while maintaining consistent mechanical dimensions and electrical characteristics for the 4 A current class. The KBU4B-E4/51 specifically denotes the 100 V version within this standardized family.

Replacement Considerations

Compatible substitutes include other Vishay KBU4 series variants with matching 4 A and 100 V ratings, such as KBU4G-E4/51 or KBU4D-E4/51, provided the voltage rating exceeds the circuit requirements. Other manufacturers offering equivalent KBU-style 4 A bridges may be considered if pinout and thermal parameters align.