VB30120C-E3/8W Equivalent & Substitute Parts

Part Overview

The VB30120C-E3/8W is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division. This component features a 1 Pair Common Cathode configuration rated for 120 V DC reverse voltage with 15 A average rectified current per diode. The part is currently in Active product status and is available in Surface Mount TO-263-3 (D2PAK) packaging.

Identification of equivalent and substitute parts becomes necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit selection from qualified alternatives that maintain electrical and mechanical compatibility within specified parameters.

Substiute Parts

VB30120C-E3/8W

Vishay General Semiconductor - Diodes DivisionIn Stock: 1182VB30120C-E3/8W Datasheet

Current PartRFQ

TSD20H120CW

Taiwan Semiconductor CorporationIn Stock: 2026TSD20H120CW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the VB30120C-E3/8W is determined by strict alignment with the following critical parameters:

Package Compatibility: The substitute part must utilize the TO-263-3 D2PAK (2 Leads + Tab) TO-263AB surface mount package to ensure mechanical and thermal interface compatibility with existing PCB layouts and thermal management designs.

Diode Configuration: The substitute must maintain a 1 Pair Common Cathode configuration to preserve circuit topology and pin functionality.

Voltage Rating: The substitute must support a minimum DC reverse voltage (Vr) rating of 120 V to meet or exceed the application's voltage stress requirements.

Current Rating: The substitute must support a minimum average rectified current (Io) of 15 A per diode to handle the specified load current without derating.

Technology Type: The substitute must employ Schottky diode technology to maintain fast recovery characteristics and forward voltage performance consistent with the original design.

Regulatory Compliance: The substitute must maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity classification to satisfy manufacturing and environmental requirements.

The TSD20H120CW from Taiwan Semiconductor Corporation qualifies as a substitute based on these parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Component (VB30120C-E3/8W): This part maintains Active product status from Vishay General Semiconductor, indicating ongoing manufacturing support and availability. Selection of the primary component is appropriate for new designs and applications requiring long-term supply assurance.

Substitute Component (TSD20H120CW): This part carries a "Not For New Designs" product status designation from Taiwan Semiconductor Corporation. The TSD20H120CW meets all critical electrical and mechanical parameters required for functional substitution, including package compatibility, voltage rating, and current capacity. However, the product status indicates limited future availability and manufacturing support.

Selection Criteria: Use the VB30120C-E3/8W for new product designs and applications requiring extended production lifecycles. Use the TSD20H120CW only when supply of the primary component is unavailable and the application permits use of a component with restricted future support. Both components satisfy ROHS3 compliance and MSL 1 requirements for manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can the TSD20H120CW directly replace the VB30120C-E3/8W in existing designs?

A: Yes, the TSD20H120CW provides direct functional substitution. Both components share identical package geometry (TO-263-3 D2PAK), diode configuration (1 Pair Common Cathode), voltage rating (120 V), and mounting type (Surface Mount). The TSD20H120CW provides higher current capacity (20 A versus 15 A), which does not create compatibility issues. No PCB layout modifications are required.

Q: What is the significance of the "Not For New Designs" status on the TSD20H120CW?

A: This designation indicates that Taiwan Semiconductor Corporation does not recommend the TSD20H120CW for incorporation into newly developed products. This status typically reflects limited manufacturing commitment and potential future discontinuation. The part remains functionally qualified for substitution in existing applications or when primary component supply is constrained.

Q: Are there electrical performance differences between these parts?

A: Both components employ Schottky technology and maintain the same 120 V reverse voltage rating and forward voltage characteristics at rated current. The TSD20H120CW supports 20 A average rectified current compared to 15 A for the VB30120C-E3/8W. This higher current rating does not create incompatibility; it represents a performance enhancement for the application.

Q: Do both parts meet the same regulatory and environmental requirements?

A: Yes. Both the VB30120C-E3/8W and TSD20H120CW are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity classification. Both satisfy identical environmental and manufacturing compliance requirements.

Q: What packaging considerations apply to these components?

A: Both components utilize the TO-263-3 D2PAK (2 Leads + Tab) TO-263AB surface mount package. This package provides identical footprint, lead spacing, and thermal interface characteristics. Existing PCB designs, solder reflow profiles, and thermal management solutions require no modification for substitution.