KBL602G Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBL602G is a single-phase bridge rectifier manufactured by GeneSiC Semiconductor, rated for 100 V peak reverse voltage and 6 A average rectified current. This component is designed for through-hole mounting applications requiring standard rectification technology. The part maintains Active product status with full RoHS compliance and unlimited moisture sensitivity rating.

Substitute parts are identified based on functional equivalence within the single-phase bridge rectifier category. Alternative models may be required due to inventory availability, packaging preferences, or specific compliance requirements across different manufacturing environments.

Key Parameters

Parameter	KBL602G Specification
Diode Type	Single Phase Bridge Rectifier
Voltage - Peak Reverse (Max)	100 V
Current - Average Rectified (Io)	6 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 6 A
Current - Reverse Leakage @ Vr	5 µA @ 100 V
Operating Temperature Range	-55°C to 150°C (TJ)
Mounting Type	Through Hole
Package / Case	4-SIP, KBL
Technology	Standard
RoHS Status	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the KBL602G is determined by the following critical parameters:

Primary Matching Criteria:

Diode Type: Single Phase Bridge Rectifier
Voltage - Peak Reverse (Max): 100 V minimum
Current - Average Rectified (Io): 6 A minimum
Mounting Type: Through Hole
Operating Temperature Range: -55°C to 150°C minimum

Secondary Compatibility Factors:

Forward voltage characteristics within acceptable operating ranges
Reverse leakage current specifications
Package form factor compatibility with 4-SIP or equivalent through-hole configurations
RoHS and environmental compliance status

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (100 V, 6 A Rating): Parts matching the exact voltage and current specifications of the KBL602G, enabling direct functional replacement in circuit designs.

Category B - Higher Current Capacity (100 V, ≥6 A Rating): Parts rated for 100 V with current capacity equal to or exceeding 6 A, suitable for applications where the KBL602G specifications are met or exceeded.

Category C - Reduced Voltage Rating (50 V, ≥6 A Rating): Parts rated for 50 V peak reverse voltage with current capacity meeting or exceeding 6 A, applicable only to circuits designed for lower voltage operation.

Parameter Comparison

Part Number	Manufacturer	Voltage (V)	Current (A)	Vf (Max) @ If	Ir @ Vr	Temp Range (°C)	Package	Product Status	RoHS Status
KBL602G	GeneSiC Semiconductor	100	6	1.1 V @ 6 A	5 µA @ 100 V	-55 to 150	4-SIP, KBL	Active	RoHS Compliant
GBU601	SMC Diode Solutions	100	6	1.1 V @ 6 A	5 µA @ 100 V	-55 to 150	4-ESIP, GBU	Active	ROHS3 Compliant
GBU6B	onsemi	100	6	1 V @ 6 A	5 µA @ 100 V	-55 to 150	4-SIP, GBU	Not For New Designs	ROHS3 Compliant
GBU6B-BP	Micro Commercial Co	100	6	1 V @ 3 A	5 µA @ 100 V	-55 to 150	4-SIP, GBU	Not For New Designs	ROHS3 Compliant
GBU1001	SMC Diode Solutions	100	10	1.1 V @ 10 A	5 µA @ 100 V	-55 to 150	4-ESIP, GBU	Active	ROHS3 Compliant
GBU8B	onsemi	100	8	1 V @ 8 A	5 µA @ 100 V	-55 to 150	4-SIP, GBU	Not For New Designs	ROHS3 Compliant
GBU4B	Diotec Semiconductor	100	2.8	1 V @ 4 A	5 µA @ 100 V	-50 to 150	4-SIP, GBU	Active	ROHS3 Compliant
GBU4B-BP	Micro Commercial Co	100	4	1 V @ 2 A	5 µA @ 100 V	-55 to 150	4-SIP, GBU	Not For New Designs	ROHS3 Compliant
GBU401	Taiwan Semiconductor Corporation	50	4	1.1 V @ 4 A	5 µA @ 50 V	-55 to 150	4-ESIP, GBU	Active	ROHS3 Compliant
GBU801	Taiwan Semiconductor Corporation	50	8	1.1 V @ 8 A	5 µA @ 50 V	-55 to 150	4-ESIP, GBU	Active	ROHS3 Compliant
KBU1001-G	Comchip Technology	100	10	1 V @ 5 A	10 µA @ 100 V	-55 to 125	4-SIP, KBU	Active	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Product Status, 100 V, 6 A):

GBU601 (SMC Diode Solutions) represents the closest functional equivalent to KBL602G. Both parts maintain identical electrical specifications: 100 V peak reverse voltage, 6 A average rectified current, and 1.1 V forward voltage at rated current. GBU601 carries Active product status with ROHS3 compliance and REACH Affected designation. Package configuration differs (4-ESIP versus 4-SIP), requiring verification of PCB layout compatibility.

Secondary Substitutes (Active Product Status, 100 V, Higher Current):

GBU1001 (SMC Diode Solutions) and KBU1001-G (Comchip Technology) provide 100 V operation with 10 A current capacity, exceeding KBL602G specifications. Both maintain Active product status. GBU1001 offers ROHS3 compliance with REACH Affected status. KBU1001-G provides ROHS3 compliance with REACH Unaffected status but operates at reduced maximum temperature (125°C versus 150°C).

Obsolescence Consideration:

GBU6B (onsemi) and GBU6B-BP (Micro Commercial Co) match electrical specifications but carry "Not For New Designs" status, indicating obsolescence trajectory. These parts remain available in inventory but should not be selected for new circuit development.

Voltage-Reduced Alternatives (50 V Rating):

GBU401 and GBU801 operate at 50 V peak reverse voltage. These parts are suitable only for applications designed for 50 V operation and do not provide equivalent protection for 100 V circuits.

Current-Reduced Alternatives:

GBU4B and GBU4B-BP are rated below the 6 A requirement of KBL602G and do not provide functional equivalence for this application.

Frequently Asked Questions (FAQ)

Q: Can GBU601 directly replace KBL602G in existing circuit boards?

A: GBU601 matches all electrical specifications (100 V, 6 A, 1.1 V forward voltage) but uses 4-ESIP package versus KBL602G's 4-SIP package. Physical pin configuration and PCB footprint must be verified before substitution. Both are through-hole mounted components with compatible lead spacing in standard configurations.

Q: What is the difference between "Active" and "Not For New Designs" product status?

A: Active status indicates the manufacturer continues production and supports the part for new circuit designs. "Not For New Designs" indicates the manufacturer has discontinued active development but may continue limited production for existing customers. New designs should prioritize Active status parts to ensure long-term supply availability.

Q: Can GBU1001 (10 A) be used instead of KBL602G (6 A)?

A: Yes. GBU1001 maintains 100 V peak reverse voltage and exceeds the 6 A current requirement. Higher current capacity does not compromise circuit function when the application requires only 6 A. Forward voltage characteristics remain compatible (1.1 V @ rated current). This substitution provides design margin for future current increases.

Q: Why do some parts show different forward voltage specifications at different current levels?

A: Forward voltage varies with operating current. GBU6B specifies 1 V @ 6 A while KBL602G specifies 1.1 V @ 6 A. Both values fall within acceptable rectifier performance ranges. The difference reflects manufacturing process variations between suppliers. Circuit designs must accommodate the maximum specified forward voltage for thermal and efficiency calculations.

Q: Are GBU401 and GBU801 suitable replacements for KBL602G?

A: No. GBU401 and GBU801 are rated for 50 V peak reverse voltage, not 100 V. These parts do not provide equivalent voltage protection and will fail in circuits designed for 100 V operation. Use these parts only in applications specifically designed for 50 V maximum input voltage.

Q: What does REACH Affected versus REACH Unaffected mean for component selection?

A: REACH Affected indicates the part contains substances regulated under European REACH regulations, requiring specific documentation and compliance verification. REACH Unaffected indicates no regulated substances are present. For applications requiring REACH compliance documentation, select parts marked REACH Unaffected or verify REACH Affected parts meet your supply chain requirements.

Q: Can KBU1001-G replace KBL602G despite the lower maximum temperature rating?

A: KBU1001-G operates to 125°C maximum junction temperature versus KBL602G's 150°C. Substitution is valid only if circuit design ensures junction temperature remains below 125°C under all operating conditions. Verify thermal management and ambient temperature limits before selection.

Q: What is the significance of different package designations (KBL, GBU, KBU)?

A: Package designations indicate different physical form factors and pin configurations. KBL, GBU, and KBU are all 4-pin through-hole bridge rectifier packages but may have different lead spacing and mounting footprints. PCB layout compatibility must be verified before substitution, even when electrical specifications match.

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