S5KB-HF Equivalent & Substitute Parts

Part Overview

The S5KB-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 800 V DC reverse voltage and 5 A average rectified current in a surface mount SMB/DO-214AA package. The device is classified as Active product status and complies with ROHS3 standards. Substitute parts are identified when equivalent electrical characteristics and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

S5KB-HF

Comchip TechnologyIn Stock: 761S5KB-HF Datasheet

Current PartRFQ

S5KB

Taiwan Semiconductor CorporationIn Stock: 3924S5KB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the S5KB-HF is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage Rating: DC reverse voltage must equal 800 V maximum
• Current Rating: Average rectified current must equal 5 A
• Forward Voltage: Maximum forward voltage must equal 1.1 V at 5 A
• Recovery Speed: Standard recovery classification with >500 ns recovery time at >200 mA
• Reverse Leakage: Maximum reverse leakage current must equal 10 µA at 800 V
• Package: Surface mount DO-214AA (SMB) package required
• Temperature Range: Operating junction temperature range must span -55°C to 150°C
• Compliance: ROHS3 compliance required

The substitute part S5KB (Taiwan Semiconductor Corporation) meets all specified electrical and mechanical parameters and is therefore classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

The S5KB manufactured by Taiwan Semiconductor Corporation is a direct parametric equivalent to the S5KB-HF. Both devices are classified as Active product status and maintain identical electrical specifications across all critical parameters: 800 V reverse voltage rating, 5 A average rectified current, 1.1 V forward voltage at 5 A, and standard recovery speed characteristics. Both components comply with ROHS3 requirements and feature MSL Level 1 (Unlimited) moisture sensitivity classification. The mechanical compatibility is confirmed through identical DO-214AA (SMB) surface mount packaging. Selection between these two parts may be based on inventory availability, supply chain logistics, or procurement preferences, as no technical differentiation exists between the devices.

Frequently Asked Questions (FAQ)

Q: Can the S5KB substitute for the S5KB-HF in all applications?

A: Yes. The S5KB meets all electrical and mechanical parameters specified for the S5KB-HF. Both devices are rated for 800 V reverse voltage, 5 A average rectified current, and feature identical forward voltage characteristics, recovery speed, reverse leakage current, and capacitance specifications. The DO-214AA (SMB) surface mount package is identical, and both components operate across the same temperature range (-55°C to 150°C).

Q: Are there any compliance or certification differences between these parts?

A: No. Both the S5KB-HF and S5KB are ROHS3 compliant and classified as MSL Level 1 (Unlimited). Both carry the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Q: What is the significance of the DO-214AA (SMB) package designation?

A: DO-214AA and SMB refer to the same surface mount package form factor. This package is a standard industry designation for small signal and rectifier diodes. Both substitute parts use this identical package, ensuring mechanical and thermal compatibility on printed circuit boards without requiring layout modifications.

Q: Are the forward voltage and reverse leakage specifications identical?

A: Yes. Both devices specify a maximum forward voltage of 1.1 V at 5 A and a maximum reverse leakage current of 10 µA at 800 V. These parameters are critical for circuit performance and are matched exactly between the S5KB-HF and S5KB.

Q: What does "Standard Recovery >500ns, > 200mA (Io)" mean?

A: This specification indicates the diode uses standard recovery technology with a recovery time exceeding 500 nanoseconds at forward currents greater than 200 mA. Both the S5KB-HF and S5KB share this identical recovery characteristic, making them functionally equivalent in switching applications.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. The identical DO-214AA (SMB) package, electrical ratings, and operating temperature range (-55°C to 150°C) confirm that these parts are mechanically and electrically interchangeable without requiring any circuit board modifications or design changes.