KBL06 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBL06 is a single-phase bridge rectifier manufactured by onsemi, rated for 600 V peak reverse voltage and 4 A average rectified current. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The KBL06 operates across a temperature range of -55°C to 150°C and is packaged in a 4-SIP through-hole configuration. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while supporting modern supply chain availability.

Key Parameters

Parameter	Value
Voltage - Peak Reverse (Max)	600 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 4 A
Current - Reverse Leakage @ Vr	5 µA @ 600 V
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBL
Diode Type	Single Phase
Technology	Standard

Substitute Part Grouping Explanation

Substitute parts for the KBL06 are qualified based on the following criteria:

Voltage Rating: All substitutes must maintain 600 V peak reverse voltage rating to ensure circuit protection and reliability
Current Rating: Substitutes must support minimum 4 A average rectified current; higher ratings (4.2 A, 6 A, 8 A) are acceptable for applications requiring additional margin
Mounting Type: All substitutes use through-hole mounting in 4-SIP package configuration, ensuring mechanical compatibility
Operating Temperature: All substitutes support the full -55°C to 150°C temperature range
Diode Type & Technology: All substitutes are single-phase standard bridge rectifiers with identical functional topology

The substitute parts listed (GBU2506-G, GBU406-G, GBU606-G, GBU806-G) are manufactured by Comchip Technology and maintain full electrical and mechanical compatibility with the KBL06 across all critical parameters.

Parameter Comparison

Parameter	KBL06	GBU406-G	GBU2506-G	GBU606-G	GBU806-G
Manufacturer	onsemi	Comchip Technology	Comchip Technology	Comchip Technology	Comchip Technology
Voltage - Peak Reverse (Max)	600 V	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	4 A	4 A	4.2 A	6 A	8 A
Voltage - Forward (Vf) (Max)	1.1 V @ 4 A	1 V @ 2 A	1 V @ 12.5 A	1 V @ 3 A	1 V @ 4 A
Current - Reverse Leakage @ Vr	5 µA @ 600 V	10 µA @ 600 V	10 µA @ 600 V	10 µA @ 600 V	10 µA @ 600 V
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	4-SIP, KBL	4-SIP, GBU	4-SIP, GBU	4-SIP, GBU	4-SIP, GBU
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

GBU406-G provides direct electrical equivalence to the KBL06 with identical 4 A current rating and 600 V voltage specification. This part is recommended for applications requiring exact performance matching. GBU406-G is active in production and ROHS3 compliant, supporting modern supply chain requirements.

GBU2506-G offers 4.2 A current capacity with equivalent voltage and temperature specifications. This part provides operational margin above the KBL06 baseline and is suitable for applications where additional current headroom is beneficial.

GBU606-G and GBU806-G provide higher current ratings (6 A and 8 A respectively) while maintaining all other electrical parameters. These parts are appropriate for applications requiring increased current capacity or where standardization on a single higher-rated component across multiple designs is preferred.

All substitute parts are manufactured by Comchip Technology, maintain active product status, and carry ROHS3 compliance certification. Package compatibility is confirmed across all options in the 4-SIP through-hole configuration.

Frequently Asked Questions (FAQ)

Q: Can GBU406-G directly replace KBL06 in existing designs? A: Yes. GBU406-G maintains identical voltage (600 V), current (4 A), and temperature (-55°C to 150°C) specifications. The 4-SIP through-hole package is mechanically compatible. Forward voltage characteristics differ slightly (1 V vs 1.1 V), but both operate within standard bridge rectifier performance parameters.

Q: What is the difference between GBU406-G, GBU2506-G, GBU606-G, and GBU806-G? A: The primary difference is average rectified current capacity: GBU406-G (4 A), GBU2506-G (4.2 A), GBU606-G (6 A), and GBU806-G (8 A). All maintain 600 V voltage rating and identical operating temperature range. Higher-rated parts provide additional current margin for the same voltage specification.

Q: Are all substitute parts ROHS3 compliant? A: Yes. GBU406-G, GBU2506-G, GBU606-G, and GBU806-G are all ROHS3 compliant. The KBL06 RoHS status is not specified in available documentation.

Q: Can I use a higher-rated part like GBU806-G in place of KBL06? A: Yes. Higher current-rated parts (GBU606-G at 6 A or GBU806-G at 8 A) are electrically compatible with the KBL06 in applications rated for 4 A. The higher rating provides additional operational margin without affecting circuit function.

Q: What is the package compatibility between KBL and GBU series? A: Both KBL06 and all GBU substitute parts use 4-SIP through-hole packaging. Physical pin configuration and PCB footprint are compatible across all listed parts.

Q: Why is reverse leakage current higher in substitute parts? A: Substitute parts specify 10 µA reverse leakage at 600 V compared to KBL06 at 5 µA. Both values are within acceptable limits for standard bridge rectifier applications and do not affect functional compatibility.

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