S3KB-HF Equivalent & Substitute Parts

Part Overview

The S3KB-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 800 V DC reverse voltage with 3 A average rectified current in a surface mount SMB/DO-214AA package. This component is classified as Active product status and complies with ROHS3 standards. Substitute parts are identified when equivalent electrical and mechanical parameters are met, enabling direct replacement in circuit applications without design modification.

Substiute Parts

S3KB-HF

Comchip TechnologyIn Stock: 1854S3KB-HF Datasheet

Current PartRFQ

S3KA_R1_00001

Panjit International Inc.In Stock: 1728S3KA_R1_00001 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the S3KB-HF are identified based on the following critical electrical and mechanical parameters:

• Voltage Rating: 800 V DC reverse voltage (Vr) maximum
• Current Rating: 3 A average rectified current (Io)
• Forward Voltage: 1.1 V maximum at 3 A forward current
• Recovery Speed: Standard recovery characteristic >500 ns at >200 mA
• Package Type: DO-214AA / SMB surface mount package
• Operating Temperature Range: -55°C to 150°C junction temperature
• Compliance: ROHS3 compliant, MSL 1 (Unlimited)

The S3KA_R1_00001 meets all specified electrical parameters and mechanical requirements, enabling direct substitution in applications requiring general-purpose rectification at 800 V / 3 A ratings.

Parameter Comparison

Engineering Selection Recommendations

The S3KA_R1_00001 (Panjit International Inc.) is a direct parametric equivalent to the S3KB-HF. Both components are Active product status and ROHS3 compliant with MSL 1 rating. The substitute part meets or exceeds all specified electrical parameters within the 800 V / 3 A rectifier diode classification. The reverse leakage current of the S3KA_R1_00001 is lower (1 µA versus 5 µA), which represents improved performance characteristics while maintaining full compatibility with circuit requirements. Both parts are packaged identically in DO-214AA / SMB surface mount format and operate across the same temperature range (-55°C to 150°C junction).

Frequently Asked Questions (FAQ)

Q: Can the S3KA_R1_00001 be used as a direct replacement for the S3KB-HF in existing designs?

A: Yes. The S3KA_R1_00001 meets all critical electrical parameters: 800 V reverse voltage rating, 3 A average rectified current, 1.1 V forward voltage at 3 A, and standard recovery speed characteristics. Both components use identical DO-214AA / SMB packaging and operate across -55°C to 150°C. No circuit redesign is required.

Q: Are there any differences in package dimensions or PCB footprint between these parts?

A: No. Both the S3KB-HF and S3KA_R1_00001 use the DO-214AA / SMB package standard. PCB footprints and land patterns are identical, enabling direct substitution without layout modification.

Q: What is the significance of the reverse leakage current difference?

A: The S3KA_R1_00001 exhibits lower reverse leakage current (1 µA at 800 V) compared to the S3KB-HF (5 µA at 800 V). This represents superior leakage performance and may provide marginal benefits in high-impedance or precision applications, though both values remain within acceptable limits for general-purpose rectification.

Q: Do both parts meet the same compliance and environmental standards?

A: Yes. Both the S3KB-HF and S3KA_R1_00001 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Both carry EAR99 export classification and identical HTSUS codes (8541.10.0080).

Q: What is the basis for substitution between these two rectifier diodes?

A: Substitution is based on matching electrical ratings (800 V reverse voltage, 3 A average rectified current, 1.1 V forward voltage), recovery speed characteristics (standard >500 ns), package type (DO-214AA / SMB), operating temperature range (-55°C to 150°C), and compliance certifications (ROHS3, MSL 1). All parameters are equivalent or superior in the substitute part.