KBL01/1 Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBL01/1 is a single-phase bridge rectifier manufactured by Vishay General Semiconductor - Diodes Division, rated for 100 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 KBL01/1 operates as a standard technology bridge rectifier in a 4-SIP through-hole package configuration.

Key Parameters

Parameter	Value
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
Mounting Type	Through Hole
Package / Case	4-SIP, KBL

Substitute Part Grouping Explanation

Substitute parts for the KBL01/1 are qualified based on the following electrical and mechanical parameters:

Voltage Rating: Peak reverse voltage must be 100 V or greater
Current Rating: Average rectified current must meet or exceed 4 A
Diode Type: Single phase bridge rectifier configuration
Technology: Standard bridge rectifier technology
Mounting Type: Through-hole package
Package Compatibility: 4-SIP package family (KBL or GBU variants)

All substitute parts listed maintain these core specifications, ensuring functional equivalence in applications designed for the KBL01/1.

Parameter Comparison

Parameter	KBL01/1	GBU2501-G	GBU401-G	GBU601-G	GBU801-G
Manufacturer	Vishay	Comchip Technology	Comchip Technology	Comchip Technology	Comchip Technology
Product Status	Obsolete	Active	Active	Active	Active
Voltage - Peak Reverse (Max)	100 V	100 V	100 V	100 V	100 V
Current - Average Rectified (Io)	4 A	4.2 A	4 A	6 A	8 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 4 A	1 V @ 12.5 A	1 V @ 2 A	1 V @ 3 A	1 V @ 4 A
Current - Reverse Leakage @ Vr	5 µA @ 100 V	10 µA @ 50 V	10 µA @ 100 V	10 µA @ 100 V	5 µA @ 100 V
Operating Temperature	Not specified	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)
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
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	Not Applicable	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

GBU401-G provides the closest electrical match to the KBL01/1, with identical 100 V voltage rating and 4 A current rating. This part is recommended for direct replacement in applications where the KBL01/1 is no longer available. The GBU401-G is active in production and ROHS3 compliant.

GBU2501-G offers slightly higher current capacity (4.2 A) while maintaining the 100 V voltage specification. This part is suitable for applications requiring marginal current headroom above the 4 A baseline.

GBU601-G and GBU801-G provide higher current ratings (6 A and 8 A respectively) and are appropriate for applications where increased current capacity is acceptable or beneficial. Both maintain the 100 V voltage rating and are active production parts with ROHS3 compliance.

All substitute parts feature improved compliance status compared to the obsolete KBL01/1, with ROHS3 certification and defined operating temperature ranges (-55°C to 150°C).

Frequently Asked Questions (FAQ)

Q: Can GBU801-G replace KBL01/1 in all applications? A: GBU801-G meets the minimum electrical requirements (100 V, ≥4 A) and shares the same through-hole 4-SIP package family. However, applications with strict current or thermal constraints should verify that the higher 8 A rating does not introduce unintended circuit behavior.

Q: What is the difference between KBL and GBU package designations? A: Both KBL and GBU are 4-SIP through-hole bridge rectifier packages. The GBU package is the active production standard used by Comchip Technology. Physical dimensions and pin configurations are compatible within the 4-SIP family.

Q: Is RoHS compliance required for KBL01/1 replacement? A: The KBL01/1 is RoHS non-compliant. All listed substitutes (GBU2501-G, GBU401-G, GBU601-G, GBU801-G) are ROHS3 compliant. New designs and regulated applications should use ROHS3 compliant parts.

Q: Which substitute part has the lowest forward voltage drop? A: GBU2501-G, GBU401-G, GBU601-G, and GBU801-G all specify 1 V maximum forward voltage, compared to 1.1 V for the KBL01/1. The specific forward voltage depends on operating current and junction temperature.

Q: Are there thermal considerations when selecting a substitute? A: All substitute parts specify operating temperature range of -55°C to 150°C (TJ). The KBL01/1 does not specify an operating temperature range. Thermal design should account for the higher current ratings of GBU601-G and GBU801-G if used in applications originally designed for 4 A operation.

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