BA979-GS08 Equivalent & Substitute Parts

Part Overview

The BA979-GS08 is an RF Diode PIN - Single 30V 50 mA SOD-80 QuadroMELF component manufactured by Vishay General Semiconductor - Diodes Division. This part is classified as obsolete, with 722 pieces currently in stock. The BA979-GS08 is ROHS3 compliant and carries an MSL rating of 1 (Unlimited), indicating no moisture sensitivity constraints during storage and handling.

Due to the obsolete status of the BA979-GS08, equivalent and substitute parts from active product lines are necessary for new designs, long-term availability assurance, and supply chain continuity. Substitute parts must maintain electrical compatibility within the specified parameter ranges while accommodating packaging and performance variations.

Key Parameters

Parameter	BA979-GS08 Value
Diode Type	PIN - Single
Voltage - Peak Reverse (Max)	30V
Current - Max	50 mA
Capacitance @ Vr, F	0.5pF @ 0V, 100MHz
Resistance @ If, F	50Ohm @ 1.5mA, 100MHz
Operating Temperature	125°C (TJ)
Package / Case	SOD-80 Variant
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution logic for the BA979-GS08 is based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Diode Type: PIN - Single (all substitutes must match)
Voltage - Peak Reverse (Max): Minimum 30V (equal or higher voltage rating acceptable)
Current - Max: Minimum 50 mA (equal or higher current rating acceptable)
Resistance @ If, F: 50Ohm @ 1.5mA, 100MHz (electrical performance parameter)
Operating Temperature: Minimum 125°C (equal or higher temperature rating acceptable)
RoHS Status: ROHS3 Compliant (regulatory requirement)
Product Status: Active preferred for long-term availability

Secondary Consideration:

Package / Case: SOD-80 variants and equivalent SMD packages acceptable based on circuit board layout compatibility

Substitutes are grouped into two categories:

Category 1 - Direct Vishay Substitute: BA679-GS08 maintains identical electrical specifications (30V, 50 mA, 0.5pF, 50Ohm) with active product status and higher inventory availability. Package variant is SOD-80 MiniMELF instead of QuadroMELF.

Category 2 - MACOM Technology Solutions Substitutes: MA4P series diodes provide higher voltage ratings (100V to 600V) and increased power dissipation (6W to 11.5W), exceeding the BA979-GS08 specifications. These parts are suitable for applications requiring enhanced performance margins or higher voltage operation.

Parameter Comparison

Part Number	Manufacturer	Diode Type	Voltage - Peak Reverse (Max)	Current - Max	Resistance @ If, F	Operating Temperature	Package / Case	Product Status	Inventory
BA979-GS08	Vishay	PIN - Single	30V	50 mA	50Ohm @ 1.5mA, 100MHz	125°C (TJ)	SOD-80 QuadroMELF	Obsolete	722 Pcs
BA679-GS08	Vishay	PIN - Single	30V	50 mA	50Ohm @ 1.5mA, 100MHz	125°C (TJ)	SOD-80 MiniMELF	Active	55200 Pcs
MA4P1250-1072T	MACOM	PIN - Single	100V	Not specified	750mOhm @ 50mA, 100MHz	-55°C ~ 175°C (TJ)	MELF	Active	305200 Pcs
MA4P7001F-1072T	MACOM	PIN - Single	100V	Not specified	900mOhm @ 100mA, 100MHz	-55°C ~ 175°C (TJ)	2-SMD	Active	21200 Pcs
MA4P7002F-1072T	MACOM	PIN - Single	200V	Not specified	900mOhm @ 100mA, 100MHz	-55°C ~ 175°C (TJ)	2-SMD	Active	5930 Pcs
MA4P7006F-1072T	MACOM	PIN - Single	600V	Not specified	900mOhm @ 100mA, 100MHz	-55°C ~ 175°C (TJ)	2-SMD	Active	1533 Pcs
MA4P7101F-1072T	MACOM	PIN - Single	200V	Not specified	500mOhm @ 100mA, 100MHz	-55°C ~ 175°C (TJ)	2-SMD, No Lead	Active	19180 Pcs
MA4P7102F-1072T	MACOM	PIN - Single	200V	Not specified	500mOhm @ 100mA, 100MHz	-55°C ~ 175°C (TJ)	2-SMD	Active	17300 Pcs
MA4P7104F-1072T	MACOM	PIN - Single	400V	Not specified	500mOhm @ 100mA, 100MHz	-55°C ~ 175°C (TJ)	2-SMD	Active	4800 Pcs

Engineering Selection Recommendations

Primary Recommendation: BA679-GS08

The BA679-GS08 is the direct electrical equivalent of the BA979-GS08, maintaining all critical specifications: 30V peak reverse voltage, 50 mA maximum current, 0.5pF capacitance, and 50Ohm resistance at 100MHz. Both parts are ROHS3 compliant with MSL 1 rating. The BA679-GS08 carries active product status with significantly higher inventory availability (55200 pieces), ensuring long-term supply chain reliability. The primary difference is the package variant: SOD-80 MiniMELF versus SOD-80 QuadroMELF. Both are SOD-80 family packages suitable for RF applications.

Secondary Recommendations: MACOM MA4P Series

MACOM MA4P series diodes are suitable for applications requiring higher voltage operation or enhanced power dissipation margins beyond the BA979-GS08 specifications. Selection within the MA4P series depends on specific voltage requirements:

MA4P1250-1072T: 100V rating, 6W power dissipation, suitable for moderate voltage applications
MA4P7001F-1072T: 100V rating, 10W power dissipation
MA4P7002F-1072T: 200V rating, 10W power dissipation
MA4P7006F-1072T: 600V rating, 10W power dissipation, suitable for high-voltage RF applications
MA4P7101F-1072T: 200V rating, 11.5W power dissipation, ODS-1072 package
MA4P7102F-1072T: 200V rating, 11.5W power dissipation
MA4P7104F-1072T: 400V rating, 11.5W power dissipation

All MACOM parts are ROHS3 compliant with active product status and extended operating temperature range (-55°C to 175°C). All parts carry MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can BA679-GS08 be used as a direct replacement for BA979-GS08?

A: Yes. The BA679-GS08 is electrically identical to the BA979-GS08 with matching voltage (30V), current (50 mA), capacitance (0.5pF @ 0V, 100MHz), and resistance (50Ohm @ 1.5mA, 100MHz) specifications. The package variant difference (MiniMELF versus QuadroMELF) requires PCB layout verification to confirm physical compatibility, but both are SOD-80 family packages.

Q: What is the difference between SOD-80 QuadroMELF and SOD-80 MiniMELF packages?

A: Both are SOD-80 family packages for surface-mount RF diodes. QuadroMELF and MiniMELF refer to different physical form factors within the SOD-80 specification. PCB footprint compatibility must be confirmed during design review. Consult package datasheets for precise dimensional specifications.

Q: When should MACOM MA4P series diodes be selected instead of BA679-GS08?

A: MACOM MA4P series diodes should be selected when the application requires voltage ratings exceeding 30V or power dissipation exceeding the BA979-GS08 specifications. The MA4P series provides voltage options from 100V to 600V and power dissipation from 6W to 11.5W, suitable for high-power RF applications or circuits operating at elevated voltage levels.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (BA679-GS08 and MACOM MA4P series) are ROHS3 compliant, matching the regulatory requirement of the BA979-GS08.

Q: What is the MSL rating for all substitute parts?

A: All substitute parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity constraints during storage and handling, consistent with the BA979-GS08.

Q: Which substitute part has the highest inventory availability?

A: MA4P1250-1072T has the highest inventory with 305200 pieces in stock. BA679-GS08 has 55200 pieces, providing the best direct equivalent availability.

Q: Do MACOM MA4P series parts require different circuit design considerations?

A: MACOM MA4P series parts have higher voltage ratings and power dissipation capabilities than the BA979-GS08. Circuit design must account for these enhanced specifications. Resistance values differ across the MA4P series (500mOhm to 900mOhm at 100mA, 100MHz), which may affect RF performance characteristics. Detailed electrical characterization is required for specific application requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message