KBJ604G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBJ604G is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 400 V peak reverse voltage and 6 A average rectified current. This component is designed for through-hole mounting in 4-SIP KBJ package configuration and is ROHS3 compliant with active product status. Alternative models within the KBJ series are available to accommodate different voltage and current requirements in rectification applications.

Key Parameters

Parameter	KBJ604G
Voltage - Peak Reverse (Max)	400 V
Current - Average Rectified (Io)	6 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Operating Temperature Range	-65°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBJ
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the KBJ604G is determined by three critical parameters: peak reverse voltage rating, average rectified current rating, and package type. All substitute parts listed maintain the 4-SIP KBJ package configuration and through-hole mounting type. Substitutes are grouped into two categories based on current rating:

6 A Current Rating Group: Parts with 6 A average rectified current (KBJ601G, KBJ606G, KBJ608G) are direct substitutes when voltage requirements are met or exceeded.

4 A Current Rating Group: Parts with 4 A average rectified current (KBJ4005G, KBJ401G, KBJ402G, KBJ404G, KBJ406G, KBJ408G, KBJ410G) are suitable only when circuit design permits reduced current capacity.

Voltage ratings range from 50 V to 1 kV. Selection requires that the substitute part voltage rating equals or exceeds the application requirement.

Parameter Comparison

Part Number	Voltage - Peak Reverse (Max)	Current - Average Rectified (Io)	Voltage - Forward (Vf) (Max) @ If	Current - Reverse Leakage @ Vr	Operating Temperature	Package / Case	Inventory Status
KBJ604G	400 V	6 A	1 V @ 3 A	5 µA @ 400 V	-65°C ~ 150°C	4-SIP, KBJ	2294 Pcs
KBJ601G	100 V	6 A	1 V @ 3 A	5 µA @ 100 V	-65°C ~ 150°C	4-SIP, KBJ	3672 Pcs
KBJ606G	600 V	6 A	1 V @ 3 A	5 µA @ 600 V	-65°C ~ 150°C	4-SIP, KBJ	1348 Pcs
KBJ608G	800 V	6 A	1 V @ 3 A	5 µA @ 800 V	-65°C ~ 150°C	4-SIP, KBJ	30400 Pcs
KBJ4005G	50 V	4 A	1 V @ 2 A	5 µA @ 50 V	-65°C ~ 150°C	4-SIP, KBJ	2620 Pcs
KBJ401G	100 V	4 A	1 V @ 2 A	5 µA @ 100 V	-65°C ~ 150°C	4-SIP, KBJ	747 Pcs
KBJ402G	200 V	4 A	1 V @ 2 A	5 µA @ 200 V	-65°C ~ 150°C	4-SIP, KBJ	669 Pcs
KBJ404G	400 V	4 A	1 V @ 2 A	5 µA @ 400 V	-65°C ~ 150°C	4-SIP, KBJ	928 Pcs
KBJ406G	600 V	4 A	1 V @ 2 A	5 µA @ 600 V	-65°C ~ 150°C	4-SIP, KBJ	10400 Pcs
KBJ408G	800 V	4 A	1 V @ 2 A	5 µA @ 800 V	-65°C ~ 150°C	4-SIP, KBJ	2154 Pcs
KBJ410G	1 kV	4 A	1 V @ 2 A	5 µA @ 1000 V	-65°C ~ 150°C	4-SIP, KBJ	800 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance, active product status, and identical operating temperature range (-65°C to 150°C). Selection between 6 A and 4 A rated parts depends on circuit current requirements. For applications requiring 6 A capacity, KBJ601G, KBJ606G, and KBJ608G are direct substitutes with matching forward voltage characteristics. For applications tolerating 4 A capacity, the 4 A series provides voltage options from 50 V to 1 kV. Voltage selection must equal or exceed application requirements. All parts use identical 4-SIP KBJ through-hole package, ensuring mechanical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can KBJ604G be replaced with a 4 A rated part? A: Only if circuit design permits reduced current capacity. The KBJ604G is rated for 6 A average rectified current. Substitution with 4 A parts (KBJ4005G, KBJ401G, KBJ402G, KBJ404G, KBJ406G, KBJ408G, KBJ410G) requires verification that load current does not exceed 4 A.

Q: What is the minimum voltage rating for KBJ604G substitution? A: The substitute part voltage rating must equal or exceed 400 V. KBJ601G (100 V) and KBJ4005G (50 V) are not suitable for 400 V applications. KBJ606G (600 V) and KBJ608G (800 V) are suitable for 400 V applications.

Q: Are all substitute parts in the same package? A: Yes. All listed parts use 4-SIP KBJ through-hole package configuration, ensuring identical PCB footprint and mounting compatibility.

Q: What determines forward voltage differences between parts? A: Forward voltage is specified at different current levels. 6 A rated parts specify Vf at 3 A, while 4 A rated parts specify Vf at 2 A. This reflects the maximum recommended test current for each part's current rating.

Q: Can higher voltage rated parts replace lower voltage rated parts? A: Yes. A part with higher peak reverse voltage rating can replace a part with lower voltage rating in the same current class. For example, KBJ608G (800 V, 6 A) can replace KBJ604G (400 V, 6 A) in applications requiring 400 V or less.

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