BA278,115 Equivalent & Substitute Parts

Part Overview

The BA278,115 is an RF Diode Standard - Single manufactured by NXP USA Inc., rated for 35V peak reverse voltage with 100 mA maximum current and 715 mW power dissipation in SC-79/SOD-523 packaging. This part is classified as Obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	BA278,115
Manufacturer	NXP USA Inc.
Diode Type	Standard - Single
Voltage - Peak Reverse (Max)	35V
Current - Max	100 mA
Power Dissipation (Max)	715 mW
Capacitance @ Vr, F	1.2pF @ 6V, 1MHz
Resistance @ If, F	700mOhm @ 2mA, 100MHz
Operating Temperature	-65°C ~ 150°C (TJ)
Package / Case	SC-79, SOD-523
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the BA278,115 is determined by the following allowed parameters:

Package compatibility: SC-79/SOD-523 form factor
Voltage rating: Minimum 35V peak reverse voltage
Current handling: Minimum 100 mA capability
Power dissipation: Minimum 715 mW rating
Operating temperature range: -65°C to 150°C
RoHS3 compliance and REACH unaffected status

Substitute parts are grouped into two categories:

Parametric Equivalent (Direct Replacement): BA891,115 from NXP USA Inc. maintains identical electrical specifications and diode type classification (Standard - Single) with Active product status.

Manufacturer Recommended Alternatives (Functional Substitutes): Skyworks Solutions Inc. PIN diode series (SMP1320-079LF, SMP1321-079LF, SMP1322-079LF, SMP1340-079LF, SMP1345-079LF, SMP1352-079LF) provide equivalent packaging and operating temperature range with higher voltage ratings and different diode type classification (PIN - Single). These parts meet or exceed the electrical requirements of the BA278,115 within the SC-79/SOD-523 package envelope.

Parameter Comparison

Part Number	Manufacturer	Diode Type	Voltage - Peak Reverse (Max)	Current - Max	Power Dissipation (Max)	Operating Temperature	Package / Case	Product Status
BA278,115	NXP USA Inc.	Standard - Single	35V	100 mA	715 mW	-65°C ~ 150°C (TJ)	SC-79, SOD-523	Obsolete
BA891,115	NXP USA Inc.	Standard - Single	35V	100 mA	715 mW	-65°C ~ 150°C (TJ)	SC-79, SOD-523	Active
SMP1320-079LF	Skyworks Solutions Inc.	PIN - Single	50V	—	250 mW	-65°C ~ 150°C (TA)	SC-79, SOD-523	Active
SMP1321-079LF	Skyworks Solutions Inc.	PIN - Single	100V	—	250 mW	-65°C ~ 150°C (TA)	SC-79, SOD-523	Active
SMP1322-079LF	Skyworks Solutions Inc.	PIN - Single	50V	—	250 mW	-65°C ~ 150°C (TA)	SC-79, SOD-523	Active
SMP1340-079LF	Skyworks Solutions Inc.	PIN - Single	50V	—	250 mW	-65°C ~ 150°C (TA)	SC-79, SOD-523	Active
SMP1345-079LF	Skyworks Solutions Inc.	PIN - Single	50V	—	250 mW	-65°C ~ 150°C (TA)	SC-79, SOD-523	Active
SMP1352-079LF	Skyworks Solutions Inc.	PIN - Single	200V	—	250 mW	-65°C ~ 150°C (TA)	SC-79, SOD-523	Active

Engineering Selection Recommendations

Primary Recommendation: BA891,115 is the direct parametric equivalent with identical electrical specifications, diode type classification, and operating temperature range. This part carries Active product status and ROHS3 compliance, providing the most straightforward replacement path for BA278,115 applications.

Alternative Selection: Skyworks Solutions Inc. PIN diode series parts (SMP1320-079LF through SMP1352-079LF) are functionally compatible within the SC-79/SOD-523 package envelope and maintain the required operating temperature range. These parts are classified as PIN diodes rather than Standard diodes and feature higher voltage ratings. All Skyworks alternatives carry Active product status and ROHS3 compliance.

Selection between Skyworks alternatives depends on application voltage requirements: SMP1320-079LF and SMP1322-079LF for 50V applications, SMP1321-079LF for 100V applications, and SMP1352-079LF for 200V applications.

Frequently Asked Questions (FAQ)

Q: Can BA891,115 be used as a direct replacement for BA278,115?

A: Yes. BA891,115 is a parametric equivalent with identical voltage rating (35V), current rating (100 mA), power dissipation (715 mW), and operating temperature range (-65°C to 150°C). Both are Standard - Single diode types in SC-79/SOD-523 packaging. The primary difference is product status: BA891,115 is Active while BA278,115 is Obsolete.

Q: What is the difference between Standard and PIN diode types?

A: The BA278,115 and BA891,115 are classified as Standard - Single diodes. The Skyworks SMP series parts are classified as PIN - Single diodes. These represent different diode architectures with different electrical characteristics. PIN diodes in the SMP series provide higher voltage ratings and different capacitance and resistance profiles compared to the Standard diode type.

Q: Are the Skyworks SMP parts compatible with BA278,115 applications?

A: Skyworks SMP parts share the SC-79/SOD-523 package form factor and operating temperature range with BA278,115. However, they are PIN diodes with different electrical characteristics. Compatibility depends on application-specific requirements for diode type, voltage rating, capacitance, and resistance parameters.

Q: What packaging options are available for substitute parts?

A: BA891,115 is available in Tape & Reel (TR) packaging. Skyworks SMP series parts are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® packaging options. All parts maintain the SC-79/SOD-523 case form factor.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. BA891,115 and all Skyworks SMP series parts (SMP1320-079LF through SMP1352-079LF) are ROHS3 Compliant with REACH Unaffected status, matching the compliance profile of BA278,115.

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