KBL01 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBL01 is a single-phase bridge rectifier manufactured by onsemi, rated for 100 V peak reverse voltage and 4 A average rectified current. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The KBL01 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 accommodating the through-hole mounting requirement.

Key Parameters

Parameter	KBL01 Specification
Diode Type	Single Phase
Technology	Standard
Voltage - Peak Reverse (Max)	100 V
Current - Average Rectified (Io)	4 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 4 A
Current - Reverse Leakage @ Vr	5 µA @ 100 V
Operating Temperature	-55°C ~ 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBL
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the KBL01 are qualified based on the following criteria:

Voltage Rating: All substitutes maintain 100 V peak reverse voltage, ensuring direct electrical compatibility
Current Rating: Substitutes range from 4 A to 8 A average rectified current, with 4 A and 4.2 A options providing direct equivalence
Diode Type & Technology: All substitutes are single-phase standard bridge rectifiers
Operating Temperature: All substitutes support the -55°C to 150°C temperature range
Mounting Type & Package: All substitutes use through-hole mounting in 4-SIP configurations (KBL or GBU packages)
Product Status: All substitute parts are active, addressing the obsolescence of the KBL01

The GBU series from Comchip Technology provides four qualified substitutes: GBU401-G (4 A), GBU2501-G (4.2 A), GBU601-G (6 A), and GBU801-G (8 A). These parts maintain electrical compatibility while offering active product status and RoHS3 compliance.

Parameter Comparison

Parameter	KBL01	GBU401-G	GBU2501-G	GBU601-G	GBU801-G
Manufacturer	onsemi	Comchip Technology	Comchip Technology	Comchip Technology	Comchip Technology
Diode Type	Single Phase	Single Phase	Single Phase	Single Phase	Single Phase
Technology	Standard	Standard	Standard	Standard	Standard
Voltage - Peak Reverse (Max)	100 V	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	4 A	4 A	4.2 A	6 A	8 A
Voltage - Forward (Vf) (Max) @ If	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 @ 100 V	10 µA @ 100 V	10 µA @ 50 V	10 µA @ 100 V	5 µA @ 100 V
Operating Temperature	-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

Direct Equivalence (4 A Rating): GBU401-G provides the closest electrical match to KBL01 with identical 4 A current rating and 100 V voltage specification. This part is active, ROHS3 compliant, and maintains through-hole 4-SIP packaging. GBU401-G is the primary substitute for direct replacement applications.

Higher Current Capacity Options: GBU2501-G (4.2 A), GBU601-G (6 A), and GBU801-G (8 A) are suitable for applications where the circuit can accommodate higher current ratings without adverse effects. These parts maintain the same voltage rating and operating temperature range. All substitute parts are active products with ROHS3 compliance, eliminating obsolescence concerns associated with the KBL01.

Compliance Considerations: All Comchip Technology substitutes carry ROHS3 compliance and REACH Unaffected status, meeting modern regulatory requirements. The KBL01's compliance status is not specified, making the transition to active, compliant substitutes advantageous for new designs and long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can GBU401-G directly replace KBL01 in existing designs? A: Yes. GBU401-G matches the KBL01 across all critical parameters: 100 V peak reverse voltage, 4 A average rectified current, -55°C to 150°C operating temperature, and through-hole 4-SIP mounting. The GBU package footprint is compatible with KBL package applications.

Q: What is the difference between GBU401-G and GBU801-G? A: The primary difference is current rating: GBU401-G is rated for 4 A while GBU801-G is rated for 8 A. Both maintain 100 V voltage rating and identical operating temperature range. GBU801-G is suitable for applications requiring higher current capacity.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All four Comchip Technology substitutes (GBU401-G, GBU2501-G, GBU601-G, GBU801-G) are ROHS3 compliant. The KBL01 compliance status is not specified.

Q: Why is KBL01 listed as obsolete? A: The KBL01 is classified as obsolete by onsemi, indicating it is no longer in active production. Comchip Technology GBU series parts provide active alternatives with equivalent or superior electrical specifications.

Q: Can I use a higher-rated substitute like GBU801-G in place of KBL01? A: Yes, provided the circuit design accommodates the higher current rating. Higher-rated bridge rectifiers are backward compatible in applications designed for lower current, as they do not impose additional electrical demands on the circuit.

Q: What is the package compatibility between KBL and GBU? A: Both KBL and GBU packages use 4-SIP through-hole configuration with identical pin spacing and mounting requirements, ensuring mechanical and electrical compatibility.

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