KBJ608G Bridge Rectifier Single Phase 800V 6A Equivalent & Substitute Parts

Part Overview

The KBJ608G is a single-phase bridge rectifier manufactured by Diodes Incorporated, rated for 800 V peak reverse voltage and 6 A average rectified current. This component is designed for through-hole mounting in the 4-SIP KBJ package configuration and is currently in active production status with 30,400 units in stock. The KBJ608G operates across a temperature range of -65°C to 150°C and complies with RoHS3 and REACH standards.

Equivalent and substitute parts are necessary when the original component becomes unavailable, when design requirements change, or when alternative voltage or current ratings better suit specific application needs while maintaining mechanical and electrical compatibility.

Key Parameters

Parameter	KBJ608G Value
Voltage - Peak Reverse (Max)	800 V
Current - Average Rectified (Io)	6 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A
Current - Reverse Leakage @ Vr	5 µA @ 800 V
Operating Temperature Range	-65°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBJ
Diode Type	Single Phase
Technology	Standard
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the KBJ608G is determined by the following criteria:

Mechanical Compatibility: All substitute parts must use the same 4-SIP KBJ package and through-hole mounting configuration to ensure direct board-level compatibility without layout modifications.

Electrical Compatibility: Substitute parts must maintain the same single-phase bridge rectifier topology and standard technology classification. The forward voltage characteristic (1 V @ rated current) and reverse leakage current (5 µA @ rated voltage) remain consistent across the KBJ series.

Voltage and Current Ratings: Substitutes are grouped by their peak reverse voltage and average rectified current ratings. Parts with equal or higher voltage ratings can substitute for the KBJ608G in applications where voltage headroom is not a constraint. Parts with lower voltage ratings cannot substitute. Parts with lower current ratings cannot substitute for 6 A applications; parts with equal or higher current ratings are acceptable.

Compliance and Environmental: All substitute parts maintain RoHS3 compliance, REACH unaffected status, and the same operating temperature range (-65°C to 150°C), ensuring regulatory and thermal compatibility.

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 (Pcs)
KBJ608G	800 V	6 A	1 V @ 3 A	5 µA @ 800 V	-65°C ~ 150°C	4-SIP, KBJ	30,400
KBJ601G	100 V	6 A	1 V @ 3 A	5 µA @ 100 V	-65°C ~ 150°C	4-SIP, KBJ	3,672
KBJ604G	400 V	6 A	1 V @ 3 A	5 µA @ 400 V	-65°C ~ 150°C	4-SIP, KBJ	2,294
KBJ606G	600 V	6 A	1 V @ 3 A	5 µA @ 600 V	-65°C ~ 150°C	4-SIP, KBJ	1,348
KBJ4005G	50 V	4 A	1 V @ 2 A	5 µA @ 50 V	-65°C ~ 150°C	4-SIP, KBJ	2,620
KBJ401G	100 V	4 A	1 V @ 2 A	5 µA @ 100 V	-65°C ~ 150°C	4-SIP, KBJ	747
KBJ402G	200 V	4 A	1 V @ 2 A	5 µA @ 200 V	-65°C ~ 150°C	4-SIP, KBJ	669
KBJ404G	400 V	4 A	1 V @ 2 A	5 µA @ 400 V	-65°C ~ 150°C	4-SIP, KBJ	928
KBJ406G	600 V	4 A	1 V @ 2 A	5 µA @ 600 V	-65°C ~ 150°C	4-SIP, KBJ	10,400
KBJ408G	800 V	4 A	1 V @ 2 A	5 µA @ 800 V	-65°C ~ 150°C	4-SIP, KBJ	2,154
KBJ410G	1 kV	4 A	1 V @ 2 A	5 µA @ 1000 V	-65°C ~ 150°C	4-SIP, KBJ	800

Engineering Selection Recommendations

Direct Equivalents (Same Voltage and Current Rating): No other part in the provided list shares the exact 800 V / 6 A rating as the KBJ608G. The KBJ608G remains the sole option for applications requiring this specific combination.

Voltage-Compatible Substitutes (6 A Current Rating): The KBJ601G (100 V / 6 A), KBJ604G (400 V / 6 A), and KBJ606G (600 V / 6 A) maintain the 6 A current capacity. These parts are suitable only for applications where the required peak reverse voltage is lower than or equal to their respective ratings. The KBJ606G (600 V) provides the closest voltage match below the KBJ608G specification.

Current-Limited Substitutes (4 A Current Rating): Parts rated for 4 A average rectified current (KBJ4005G, KBJ401G, KBJ402G, KBJ404G, KBJ406G, KBJ408G, KBJ410G) cannot substitute for applications requiring 6 A capacity. These parts are suitable only for designs with lower current demands.

Compliance Status: All listed parts maintain active production status, RoHS3 compliance, and REACH unaffected designation. All operate within the -65°C to 150°C temperature range and use identical 4-SIP KBJ through-hole packaging.

Frequently Asked Questions (FAQ)

Q: Can KBJ606G replace KBJ608G in my circuit? A: The KBJ606G shares the same 6 A current rating and 4-SIP KBJ package as the KBJ608G. However, it is rated for 600 V peak reverse voltage compared to the KBJ608G's 800 V rating. Substitution is only valid if your circuit operates at 600 V or lower. If your design requires 800 V capability, the KBJ606G is not suitable.

Q: Why can't I use KBJ408G instead of KBJ608G? A: The KBJ408G is rated for 4 A average rectified current, while the KBJ608G is rated for 6 A. If your application requires 6 A capacity, the KBJ408G will not provide sufficient current handling capability and may fail or overheat under load.

Q: Are all KBJ series parts mechanically interchangeable? A: Yes. All parts listed use the 4-SIP KBJ package configuration with through-hole mounting. They are mechanically interchangeable at the board level without layout modifications. Electrical compatibility depends on voltage and current rating requirements.

Q: What is the difference between KBJ601G and KBJ4005G? A: Both parts use the 4-SIP KBJ package. The KBJ601G is rated for 100 V / 6 A, while the KBJ4005G is rated for 50 V / 4 A. The KBJ601G provides higher voltage and current capacity. Selection depends on your specific voltage and current requirements.

Q: Do all these parts have the same compliance certifications? A: Yes. All listed parts are RoHS3 compliant, REACH unaffected, and maintain the same -65°C to 150°C operating temperature range. They share identical regulatory and environmental compliance status.

Q: Can I use a higher voltage-rated part in place of KBJ608G? A: The KBJ410G is rated for 1 kV / 4 A. While it provides higher voltage capability, it is limited to 4 A current capacity. Substitution is only valid if your application requires 4 A or less. If 6 A capacity is required, the KBJ410G is not suitable.

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