KBPC3508T Bridge Rectifier Equivalent & Substitute Parts

Part Overview

The KBPC3508T is a single-phase bridge rectifier manufactured by GeneSiC Semiconductor, rated for 800 V peak reverse voltage and 35 A average rectified current. This component operates across a temperature range of -55°C to 150°C and features QC terminal mounting with a 4-Square KBPC-T package configuration. The part maintains Active product status and holds RoHS Compliance certification.

Bridge rectifiers of this specification are essential in power conversion applications requiring single-phase AC-to-DC rectification. Equivalent and substitute parts become necessary when managing inventory constraints, addressing supply chain variations, or accommodating manufacturer-specific packaging preferences while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Peak Reverse (Max)	800	V
Current - Average Rectified (Io)	35	A
Voltage - Forward (Vf) (Max) @ If	1.1 @ 17.5	V @ A
Current - Reverse Leakage @ Vr	5	µA @ 800 V
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	QC Terminal	—
Package / Case	4-Square, KBPC-T	—
Diode Type	Single Phase	—
Technology	Standard	—

Substitute Part Grouping Explanation

Substitution eligibility for the KBPC3508T is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Voltage - Peak Reverse (Max): 800 V (exact match required)
Diode Type: Single Phase (exact match required)
Technology: Standard (exact match required)
Mounting Type: QC Terminal (exact match required)
Operating Temperature Range: -55°C to 150°C (exact match required)

Current Rating Consideration:

Current - Average Rectified (Io): Substitute parts must equal or exceed 35 A to maintain or improve current capacity

Electrical Performance:

Voltage - Forward (Vf) and Current - Reverse Leakage must remain within acceptable industrial tolerances for bridge rectifier applications

Packaging:

Package / Case must accommodate QC terminal configuration; variations in supplier device package designation are acceptable provided mechanical fit and terminal compatibility are preserved

The substitute parts listed below satisfy all mandatory criteria while offering variations in current rating, manufacturer, packaging format, and compliance certifications.

Parameter Comparison

Parameter	KBPC3508T (GeneSiC)	KBPC3508-G (Comchip)	GBPC5008-G (Comchip)	KBPC2508-G (Comchip)
Manufacturer	GeneSiC Semiconductor	Comchip Technology	Comchip Technology	Comchip Technology
Voltage - Peak Reverse (Max)	800 V	800 V	800 V	800 V
Current - Average Rectified (Io)	35 A	35 A	50 A	25 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 17.5 A	1.1 V @ 17.5 A	1.1 V @ 25 A	1.1 V @ 12.5 A
Current - Reverse Leakage @ Vr	5 µA @ 800 V	10 µA @ 800 V	10 µA @ 800 V	10 µA @ 800 V
Operating Temperature	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Mounting Type	QC Terminal	QC Terminal	QC Terminal	QC Terminal
Package / Case	4-Square, KBPC-T	4-Square, KBPC	4-Square, GBPC	4-Square, KBPC
Packaging Format	Bulk	Tray	Tray	Bulk
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalent (Preferred Substitution):

KBPC3508-G (Comchip Technology) provides direct electrical and mechanical equivalence to the KBPC3508T. Both parts share identical voltage rating (800 V), current rating (35 A), forward voltage characteristics (1.1 V @ 17.5 A), and operating temperature range (-55°C to 150°C). The primary difference is packaging format (Tray versus Bulk) and compliance certification (ROHS3 versus RoHS Compliant). Both maintain Active product status. This substitute is suitable for direct replacement in applications where packaging format flexibility is acceptable.

Higher Current Capacity Alternative:

GBPC5008-G (Comchip Technology) offers increased current capacity at 50 A while maintaining the same 800 V voltage rating and operating temperature range. This part is applicable in applications where current margin enhancement is beneficial. The forward voltage remains at 1.1 V but is specified at 25 A. Reverse leakage increases to 10 µA. Package designation changes from KBPC to GBPC, though both utilize 4-Square QC terminal configuration. ROHS3 compliance and Active product status are maintained.

Lower Current Capacity Alternative:

KBPC2508-G (Comchip Technology) provides reduced current capacity at 25 A. This substitute is applicable only in applications where the original 35 A requirement can be reduced without performance degradation. Voltage rating (800 V) and operating temperature range remain identical. Forward voltage is specified at 1.1 V @ 12.5 A. This part is not recommended as a direct replacement for designs requiring the full 35 A specification.

Compliance and Inventory Considerations:

All substitute parts maintain Active product status and RoHS/ROHS3 compliance, ensuring regulatory alignment. Comchip Technology substitutes include REACH Unaffected designation. Inventory availability varies: KBPC3508-G (1167 Pcs), GBPC5008-G (765 Pcs), and KBPC2508-G (1155 Pcs) are in stock.

Frequently Asked Questions (FAQ)

Q: Can KBPC3508-G replace KBPC3508T in all applications?

A: Yes. KBPC3508-G provides identical electrical specifications (800 V, 35 A, 1.1 V forward voltage, -55°C to 150°C operating range) and QC terminal mounting. The only differences are packaging format (Tray versus Bulk) and compliance certification level (ROHS3 versus RoHS Compliant). Both are Active products suitable for direct substitution.

Q: What is the difference between KBPC and GBPC package designations?

A: Both KBPC and GBPC utilize 4-Square QC terminal configuration and are mechanically compatible. The designation difference reflects manufacturer-specific naming conventions. GBPC5008-G is manufactured by Comchip Technology, while KBPC variants are available from both GeneSiC and Comchip. Terminal layout and mounting compatibility remain consistent across both designations.

Q: Can GBPC5008-G be used instead of KBPC3508T?

A: GBPC5008-G is electrically compatible with KBPC3508T for applications requiring 35 A or less. The 50 A current rating provides additional capacity margin. Voltage rating (800 V), operating temperature (-55°C to 150°C), and QC terminal mounting are identical. The primary consideration is package designation change (GBPC versus KBPC-T) and reverse leakage increase (10 µA versus 5 µA). This substitute is suitable when current margin is beneficial.

Q: Is KBPC2508-G a suitable substitute?

A: KBPC2508-G is not recommended as a direct substitute for KBPC3508T. While voltage rating (800 V) and operating temperature range (-55°C to 150°C) are identical, the current rating is reduced to 25 A. This part is applicable only in applications where the design requirement can be reduced from 35 A to 25 A without performance degradation.

Q: What are the compliance differences between the parts?

A: KBPC3508T carries RoHS Compliant certification. KBPC3508-G, GBPC5008-G, and KBPC2508-G all carry ROHS3 Compliant certification, which represents an updated compliance standard. Comchip Technology substitutes also include REACH Unaffected designation. All parts maintain Active product status and are suitable for regulated applications.

Q: How do reverse leakage specifications affect substitution?

A: KBPC3508T specifies 5 µA reverse leakage at 800 V. Comchip substitutes specify 10 µA at 800 V. This difference is within acceptable industrial tolerance for bridge rectifier applications and does not prevent substitution. Applications with stringent leakage requirements should verify compatibility with the higher leakage specification.

Q: Does packaging format (Bulk versus Tray) affect electrical performance?

A: No. Packaging format affects only handling, storage, and logistics. Bulk and Tray packaging contain identical electrical components. KBPC3508T (Bulk) and KBPC3508-G (Tray) are electrically equivalent; packaging format selection depends on inventory management and procurement requirements.

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