BA479G-TAP RF Diode PIN Equivalent & Substitute Parts

Part Overview

The BA479G-TAP is an RF Diode PIN manufactured by Vishay General Semiconductor - Diodes Division, classified as a single PIN diode rated for 30V peak reverse voltage with 50 mA maximum current. The device is packaged in DO-204AH (DO-35) axial configuration and is currently in active product status with RoHS3 compliance. This part is used in RF switching, attenuation, and modulation applications requiring low capacitance and controlled resistance characteristics at RF frequencies.

Equivalent and substitute parts are necessary when the BA479G-TAP becomes unavailable, when alternative packaging formats are required, or when application requirements demand enhanced performance specifications such as higher voltage ratings or increased power dissipation capabilities.

Substiute Parts

BA479G-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 721BA479G-TAP Datasheet

Current PartRFQ

MA4P1200NM-401T

MACOM Technology SolutionsIn Stock: 4258MA4P1200NM-401T Datasheet

MFR RecommendedRFQ

MA4P4001B-402

MACOM Technology SolutionsIn Stock: 910MA4P4001B-402 Datasheet

MFR RecommendedRFQ

MA4P4002B-402

MACOM Technology SolutionsIn Stock: 1122MA4P4002B-402 Datasheet

MFR RecommendedRFQ

MA4P4006B-402

MACOM Technology SolutionsIn Stock: 1214MA4P4006B-402 Datasheet

MFR RecommendedRFQ

MA4P4301B-402

MACOM Technology SolutionsIn Stock: 2139MA4P4301B-402 Datasheet

MFR RecommendedRFQ

MA4P7102B-401T

MACOM Technology SolutionsIn Stock: 1327MA4P7102B-401T Datasheet

MFR RecommendedRFQ

MA4P7104B-401T

MACOM Technology SolutionsIn Stock: 2318MA4P7104B-401T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BA479G-TAP is determined by the following electrical and mechanical criteria:

Primary Substitution Parameters:

• Diode Type: PIN - Single (required match)
• Package / Case: Axial configuration (mechanical compatibility)
• Voltage - Peak Reverse (Max): Equal to or greater than 30V (functional requirement)
• Current - Max: Equal to or greater than 50 mA (functional requirement)
• Operating Temperature Range: Must encompass or exceed the original specification
• RoHS Status: ROHS3 Compliant (regulatory requirement)

Secondary Consideration Parameters:

• Capacitance @ Vr, F: Lower values preferred for RF performance
• Resistance @ If, F: Values suitable for RF switching applications
• Power Dissipation (Max): Higher ratings provide design margin

All substitute parts listed are MACOM Technology Solutions MA4P series PIN diodes in axial package configuration. Each substitute meets or exceeds the minimum electrical requirements of the BA479G-TAP while offering enhanced performance specifications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are manufactured by MACOM Technology Solutions and maintain active product status with ROHS3 compliance, meeting regulatory requirements equivalent to the BA479G-TAP.

Voltage Rating Selection:

• MA4P1200NM-401T, MA4P4001B-402, MA4P4301B-402: 100V rating (3.3× margin over BA479G-TAP 30V specification)
• MA4P4002B-402, MA4P7102B-401T: 200V rating (6.7× margin over BA479G-TAP 30V specification)
• MA4P7104B-401T: 400V rating (13.3× margin over BA479G-TAP 30V specification)
• MA4P4006B-402: 600V rating (20× margin over BA479G-TAP 30V specification)

Current Capability:

• MA4P4001B-402, MA4P4002B-402, MA4P4301B-402: 100 mA rating (2× the BA479G-TAP 50 mA specification)
• MA4P1200NM-401T, MA4P7102B-401T, MA4P7104B-401T, MA4P4006B-402: Current ratings not specified in provided data

Packaging Considerations:

• MA4P1200NM-401T, MA4P7102B-401T, MA4P7104B-401T: Cut Tape (CT) packaging
• MA4P4001B-402, MA4P4002B-402: Bulk packaging
• MA4P4301B-402, MA4P4006B-402: Tray packaging

All substitute parts are supplied in axial package configuration, maintaining mechanical compatibility with BA479G-TAP DO-35 axial footprint.

Frequently Asked Questions (FAQ)

Q: Can any of the listed substitute parts directly replace the BA479G-TAP without circuit modification?

A: All listed substitute parts are PIN - Single diodes in axial package configuration with voltage ratings equal to or exceeding 30V and current ratings equal to or exceeding 50 mA. Direct mechanical and electrical substitution is possible. However, circuit performance may be affected by differences in capacitance and resistance characteristics at RF frequencies. Verification of RF performance in the specific application circuit is necessary.

Q: What is the significance of the voltage rating differences between the BA479G-TAP and substitute parts?

A: The BA479G-TAP is rated for 30V peak reverse voltage. All substitute parts exceed this specification, providing increased design margin for overvoltage protection. Higher voltage-rated diodes maintain the same functional capability at lower voltages while offering protection against transient overvoltage conditions.

Q: How do capacitance differences affect RF circuit performance?

A: Capacitance values determine the diode's frequency response and impedance characteristics in RF applications. The BA479G-TAP specifies 0.5pF @ 0V, 100MHz. Substitute parts range from 1pF to 2.2pF at different bias voltages and frequencies. Lower capacitance values are preferred for higher frequency applications. Circuit tuning or impedance matching adjustments may be required when substituting parts with different capacitance specifications.

Q: What packaging options are available for the substitute parts?

A: Substitute parts are supplied in three packaging formats: Cut Tape (CT), Bulk, and Tray. All maintain axial configuration compatible with BA479G-TAP DO-35 footprint. Packaging selection depends on procurement volume and assembly process requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant, meeting the same regulatory requirements as the BA479G-TAP.

Q: What is the operating temperature range difference between the BA479G-TAP and substitute parts?

A: The BA479G-TAP operates from -55°C to 125°C. All MACOM substitute parts operate from -55°C to 175°C, providing a 50°C higher maximum operating temperature. This extended range offers additional thermal margin for high-temperature applications.