BA980-GS18 RF PIN Diode Equivalent & Substitute Parts

Part Overview

The BA980-GS18 is an RF PIN diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 30V peak reverse voltage with 50 mA maximum current in a SOD-80 QuadroMELF package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The BA980-GS18 serves RF switching and attenuation applications where low capacitance and controlled resistance characteristics are required.

Substiute Parts

BA980-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 1177BA980-GS18 Datasheet

Current PartRFQ

BA679-GS18

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

DirectRFQ

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 for the BA980-GS18 is determined by the following critical parameters:

Primary Substitution Criteria:

• Diode Type: PIN - Single (all substitutes must maintain this classification)
• Voltage Rating: Minimum 30V peak reverse voltage (substitutes may exceed this rating)
• Current Capability: Minimum 50 mA (substitutes may exceed this rating)
• Capacitance: Low-capacitance RF characteristics (0.5pF or lower preferred)
• Resistance: Controlled series resistance for RF switching applications
• Package Compatibility: SMD packages suitable for RF applications

Substitution Tiers:

Tier 1 - Direct Functional Equivalent: BA679-GS18 is a direct substitute from the same manufacturer (Vishay) with identical voltage and current ratings, matching capacitance, and active product status. The primary difference is package variant (MiniMELF vs. QuadroMELF) and slightly lower series resistance (50Ohm vs. 60Ohm).

Tier 2 - Higher-Rated Alternatives: MACOM MA4P series diodes (MA4P7001F-1072T, MA4P7002F-1072T, MA4P7006F-1072T, MA4P7101F-1072T, MA4P7102F-1072T, MA4P7104F-1072T) provide higher voltage ratings (100V to 600V) and increased power dissipation (6W to 11.5W). These are suitable for applications requiring higher voltage margins or increased power handling while maintaining PIN diode RF characteristics.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended First Choice): BA679-GS18 is the primary substitute. It maintains identical electrical specifications (30V, 50 mA, 0.5pF capacitance) and active product status. The MiniMELF package is a standard SMD variant compatible with modern PCB assembly processes. This part is in active production with 10,200 pieces in stock.

For Higher Voltage Applications: When circuit design permits higher voltage ratings, MACOM MA4P7101F-1072T or MA4P7102F-1072T provide 200V ratings with improved power dissipation (11.5W) and lower series resistance (500mOhm). These parts support extended operating temperature ranges (-55°C to 175°C) compared to the original BA980-GS18 (up to 125°C).

For Maximum Voltage Margin: MA4P7006F-1072T offers 600V peak reverse voltage rating for applications requiring the highest voltage isolation. This part maintains 10W power dissipation and 900mOhm series resistance.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and EAR99 export classification. BA679-GS18 and MACOM parts are in active production status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can BA679-GS18 be used as a direct drop-in replacement for BA980-GS18? A: BA679-GS18 is electrically equivalent with matching voltage (30V), current (50 mA), and capacitance (0.5pF) specifications. The primary difference is the package variant: BA679-GS18 uses SOD-80 MiniMELF while BA980-GS18 uses SOD-80 QuadroMELF. PCB layout modifications may be required to accommodate the different package footprint.

Q: What is the difference between the Vishay BA679-GS18 and MACOM MA4P series substitutes? A: BA679-GS18 maintains the original 30V/50 mA rating and is the closest electrical match. MACOM MA4P series diodes provide higher voltage ratings (100V to 600V) and increased power dissipation (6W to 11.5W), making them suitable for applications requiring higher voltage margins or greater power handling capability. Series resistance varies between 500mOhm and 900mOhm depending on the specific model.

Q: Are all substitute parts RoHS compliant? A: BA679-GS18 and all MACOM MA4P series parts listed are ROHS3 compliant. This ensures compatibility with modern manufacturing standards and environmental regulations.

Q: What is the inventory status of substitute parts? A: BA679-GS18 has 10,200 pieces in stock. MACOM parts range from 305,200 pieces (MA4P1250-1072T) to 1,533 pieces (MA4P7006F-1072T), providing multiple sourcing options with varying availability levels.

Q: Can MACOM MA4P series diodes be used in applications designed for the BA980-GS18? A: MACOM parts are suitable for applications where higher voltage ratings and power dissipation are acceptable. However, the higher series resistance (500mOhm to 900mOhm versus 60Ohm) and different capacitance characteristics may affect RF performance in sensitive switching or attenuation circuits. Circuit simulation or testing is necessary to confirm performance equivalence in specific applications.

Q: What is the operating temperature range difference between BA980-GS18 and substitutes? A: BA980-GS18 operates to 125°C junction temperature. BA679-GS18 also operates to 125°C. MACOM MA4P series parts operate across -55°C to 175°C, providing a wider temperature range suitable for industrial and military applications.