BA679-GS18 Equivalent & Substitute Parts

Part Overview

The BA679-GS18 is an RF PIN diode manufactured by Vishay General Semiconductor - Diodes Division, designed for RF switching and attenuator applications. This single PIN diode operates at a peak reverse voltage of 30V with a maximum current rating of 50 mA in a SOD-80 MiniMELF package. The part is currently active and in stock with 10,200 units available. Substitute parts are necessary when application requirements exceed the voltage or power dissipation specifications of the BA679-GS18, or when alternative packaging or thermal performance is required for system integration.

Substiute Parts

BA679-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 10237BA679-GS18 Datasheet

Current PartRFQ

MA4P1250-1072T

MACOM Technology SolutionsIn Stock: 305226MA4P1250-1072T Datasheet

MFR RecommendedRFQ

MA4P7001F-1072T

MACOM Technology SolutionsIn Stock: 21259MA4P7001F-1072T Datasheet

MFR RecommendedRFQ

MA4P7002F-1072T

MACOM Technology SolutionsIn Stock: 6022MA4P7002F-1072T Datasheet

MFR RecommendedRFQ

MA4P7006F-1072T

MACOM Technology SolutionsIn Stock: 1569MA4P7006F-1072T Datasheet

MFR RecommendedRFQ

MA4P7101F-1072T

MACOM Technology SolutionsIn Stock: 19228MA4P7101F-1072T Datasheet

MFR RecommendedRFQ

MA4P7102F-1072T

MACOM Technology SolutionsIn Stock: 17326MA4P7102F-1072T Datasheet

MFR RecommendedRFQ

MA4P7104F-1072T

MACOM Technology SolutionsIn Stock: 4825MA4P7104F-1072T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BA679-GS18 is determined by the following electrical and mechanical parameters:

• Diode Type: All substitutes must be PIN - Single diodes to maintain functional equivalence
• Voltage - Peak Reverse (Max): Substitute parts must meet or exceed the 30V requirement of the BA679-GS18
• Current Rating: Substitute parts must support the application's current requirements
• Resistance @ If, F: Forward resistance characteristics at specified current and frequency determine RF performance compatibility
• Operating Temperature Range: Substitute parts must support the thermal environment of the application
• Package Compatibility: Physical and electrical package characteristics must be compatible with PCB layout and thermal management requirements
• Compliance: All substitutes must maintain ROHS3 compliance and MSL 1 rating

The substitute parts listed (MA4P series from MACOM Technology Solutions) exceed the voltage and power dissipation specifications of the BA679-GS18, making them suitable for applications requiring higher voltage ratings or improved thermal performance.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements. Selection among substitute parts depends on application-specific voltage and power dissipation requirements:

• MA4P1250-1072T: Suitable for applications requiring 100V peak reverse voltage with 6W power dissipation capability. Lowest power rating among substitutes.
• MA4P7001F-1072T and MA4P7002F-1072T: Appropriate for 100V and 200V applications respectively, with 10W power dissipation. MA4P7001F-1072T offers lower voltage operation; MA4P7002F-1072T extends voltage capability to 200V.
• MA4P7006F-1072T: Designed for high-voltage applications requiring 600V peak reverse voltage with 10W power dissipation.
• MA4P7101F-1072T and MA4P7102F-1072T: Both rated for 200V operation with 11.5W power dissipation. MA4P7101F-1072T features lower forward resistance (500mOhm) and specified capacitance characteristics.
• MA4P7104F-1072T: Rated for 400V operation with 11.5W power dissipation and 500mOhm forward resistance.

All substitute parts support extended operating temperature range (-55°C to 175°C) compared to the BA679-GS18 (125°C maximum), providing improved thermal margin for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can MA4P series diodes directly replace the BA679-GS18 in existing designs?

A: Direct replacement requires PCB layout compatibility. The BA679-GS18 uses SOD-80 MiniMELF packaging, while MA4P series parts use 2-SMD or ODS-1072 packages. Physical footprint differences necessitate PCB redesign. Electrical substitution is valid when voltage and current requirements are met.

Q: What is the primary difference between BA679-GS18 and MA4P substitute parts?

A: The BA679-GS18 is rated for 30V maximum reverse voltage with 50 mA current. All MA4P substitutes exceed this voltage rating (100V minimum to 600V maximum) and support higher current levels (100 mA), making them suitable for higher-power RF applications.

Q: Which substitute part should be selected for a 200V application?

A: MA4P7002F-1072T, MA4P7101F-1072T, and MA4P7102F-1072T are all rated for 200V operation. Selection depends on power dissipation requirements and forward resistance characteristics. MA4P7101F-1072T and MA4P7102F-1072T offer 11.5W dissipation with 500mOhm resistance; MA4P7002F-1072T provides 10W dissipation with 900mOhm resistance.

Q: Are all substitute parts RoHS compliant?

A: Yes, all listed MA4P series substitute parts are ROHS3 compliant with MSL 1 rating, matching the compliance profile of the BA679-GS18.

Q: What packaging considerations apply when substituting the BA679-GS18?

A: The BA679-GS18 uses SOD-80 MiniMELF packaging. MA4P substitutes use 2-SMD or ODS-1072 packages. Physical dimensions and PCB footprints differ significantly, requiring layout modifications. Thermal characteristics may also differ due to package geometry changes.