SS33HE3_B/H Equivalent & Substitute Parts

Part Overview

The SS33HE3_B/H is a Schottky rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AB (SMC) package. This component operates at 30 V DC reverse voltage with a 3 A average rectified current rating and features fast recovery characteristics suitable for high-frequency switching applications. The part maintains active product status with automotive-grade qualification under AEC-Q101 standards. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity while maintaining electrical and mechanical compatibility.

Substiute Parts

SS33HE3_B/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 813SS33HE3_B/H Datasheet

Current PartRFQ

SK33-TP

Micro Commercial CoIn Stock: 5811SK33-TP Datasheet

Parametric EquivalentRFQ

SS33

Fairchild SemiconductorIn Stock: 26236SS33 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SS33HE3_B/H are identified based on strict electrical and mechanical parameter matching within the Schottky diode rectifier category. The substitution criteria are:

Primary Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): 30 V
• Current - Average Rectified (Io): 3 A
• Voltage - Forward (Vf) (Max) @ If: 500 mV @ 3 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 500 µA @ 30 V
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Operating Temperature - Junction: -55°C to 150°C

All identified substitute parts meet these electrical specifications and physical package requirements, ensuring direct functional compatibility in circuit applications. Differences in product status, manufacturer, and packaging format (Tape & Reel versus Bulk) do not affect electrical performance or mechanical fit.

Parameter Comparison

Engineering Selection Recommendations

SS33 (Fairchild Semiconductor) is the primary parametric equivalent for the SS33HE3_B/H. Both parts maintain active product status and are suitable for new designs. The SS33 is available in bulk packaging format, offering cost efficiency for high-volume applications. This part is recommended for applications where supply continuity and active manufacturer support are required.

SK33-TP (Micro Commercial Co) is a parametric equivalent with identical electrical specifications and DO-214AB SMC package configuration. However, this part carries a "Not For New Designs" product status designation. The SK33-TP is suitable for legacy system maintenance, repair operations, and applications where existing inventory must be sustained. This part should not be selected for new product development initiatives.

Both substitute parts comply with ROHS3 standards and maintain the automotive-grade qualification requirements of the original SS33HE3_B/H component. Selection between active-status alternatives should prioritize design longevity and manufacturer support roadmap alignment.

Frequently Asked Questions (FAQ)

Q: Can the SK33-TP be used as a direct replacement for the SS33HE3_B/H in new designs?

A: No. The SK33-TP carries a "Not For New Designs" product status. While it meets all electrical and mechanical parameters, it is intended for legacy system support and repair applications only. The SS33 (Fairchild Semiconductor) is the recommended substitute for new product development.

Q: Are there package compatibility differences between these substitute parts?

A: All three parts use the DO-214AB (SMC) surface mount package with identical mechanical dimensions and pin configurations. The primary packaging difference is format: SS33HE3_B/H and SK33-TP are supplied in Tape & Reel format, while SS33 is available in Bulk format. This distinction affects procurement and assembly processes but does not impact electrical performance or physical fit on the circuit board.

Q: What electrical parameters must remain constant for substitution?

A: The following parameters must match exactly for functional equivalence: Voltage - DC Reverse (Vr) at 30 V maximum, Current - Average Rectified (Io) at 3 A, Voltage - Forward (Vf) at 500 mV @ 3 A, Fast Recovery speed characteristic ≤ 500ns, and Current - Reverse Leakage at 500 µA @ 30 V. All identified substitutes meet these specifications.

Q: Does the automotive-grade qualification apply to all substitute parts?

A: The SS33HE3_B/H and SK33-TP both carry automotive-grade designation with AEC-Q101 qualification. The SS33 (Fairchild Semiconductor) does not specify automotive-grade qualification in the provided data. For applications requiring automotive-grade components, the SS33HE3_B/H or SK33-TP are the appropriate selections.

Q: What is the operating temperature range for these diodes?

A: All three parts operate across a junction temperature range of -55°C to 150°C, supporting both industrial and automotive environmental conditions.

Q: Are there inventory considerations when selecting a substitute?

A: Yes. Current inventory levels differ significantly: SS33HE3_B/H has 789 pieces in stock, SK33-TP has 5,722 pieces, and SS33 has 26,200 pieces available. For applications requiring immediate availability or high-volume procurement, the SS33 offers the largest inventory position.