BFS540,115 Equivalent & Substitute Parts Reference

Part Overview

The BFS540,115 is an RF transistor NPN manufactured by NXP USA Inc., designed for high-frequency applications up to 9GHz with a maximum collector-emitter breakdown voltage of 15V and power dissipation of 500mW. This device is packaged in SC-70 (SOT-323-3) surface mount configuration and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility within the electrical and mechanical constraints of the application.

Substiute Parts

BFS540,115

NXP USA Inc.In Stock: 1072BFS540,115 Datasheet

Current PartRFQ

2SC5226A-5-TL-E

onsemiIn Stock: 41452SC5226A-5-TL-E Datasheet

DirectRFQ

2SC2714-Y(TE85L,F)

Toshiba Semiconductor and StorageIn Stock: 42042SC2714-Y(TE85L,F) Datasheet

MFR RecommendedRFQ

BFP740H6327XTSA1

Infineon TechnologiesIn Stock: 14285BFP740H6327XTSA1 Datasheet

MFR RecommendedRFQ

BFR193WH6327XTSA1

Infineon TechnologiesIn Stock: 3433BFR193WH6327XTSA1 Datasheet

MFR RecommendedRFQ

BFR740L3RHE6327XTSA1

Infineon TechnologiesIn Stock: 2395BFR740L3RHE6327XTSA1 Datasheet

MFR RecommendedRFQ

PH3135-5S

MACOM Technology SolutionsIn Stock: 827PH3135-5S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BFS540,115 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Transistor Type: NPN (mandatory match)
• Voltage - Collector Emitter Breakdown (Max): Must equal or exceed 15V
• Frequency - Transition: Must equal or exceed 9GHz
• Power - Max: Must equal or exceed 500mW
• Current - Collector (Ic) (Max): Must equal or exceed 120mA
• Mounting Type: Surface Mount (mandatory match)
• Package / Case: SC-70 or SOT-323 compatible packages
• RoHS Status: ROHS3 Compliant (mandatory match)
• Moisture Sensitivity Level: MSL 1 (mandatory match)

Substitution Logic: Substitute parts are grouped based on their ability to meet or exceed the electrical performance envelope of the BFS540,115 while maintaining surface mount compatibility. Parts that fall below the specified voltage, frequency, power, or current ratings are not suitable substitutes. Package compatibility is evaluated based on pin count and footprint equivalence within the SC-70/SOT-323 family or compatible surface mount packages.

The following substitute parts are identified:

1. BFR193WH6327XTSA1 (Infineon Technologies) - Meets voltage (12V), frequency (8GHz), and power (580mW) requirements with SC-70/SOT-323 package compatibility.

2. 2SC2714-Y(TE85L,F) (Toshiba Semiconductor and Storage) - Exceeds voltage (30V) and power (100mW) specifications; frequency (550MHz) and current (20mA) are below BFS540,115 requirements; package is TO-236-3/SC-59/SOT-23-3.

3. BFP740H6327XTSA1 (Infineon Technologies) - Exceeds frequency (42GHz) and gain specifications; voltage (4.7V) and current (30mA) are below BFS540,115 requirements; package is SC-82A/SOT-343.

4. BFR740L3RHE6327XTSA1 (Infineon Technologies) - Exceeds frequency (42GHz) specifications; voltage (4.7V) and current (30mA) are below BFS540,115 requirements; package is SC-101/SOT-883.

5. PH3135-5S (MACOM Technology Solutions) - Exceeds voltage (60V), power (5W), and current (750mA) specifications; frequency and noise figure data not provided; package information not provided.

Parameter Comparison

Engineering Selection Recommendations

BFR193WH6327XTSA1 (Infineon Technologies)

This part provides the closest electrical and mechanical compatibility with the BFS540,115. It maintains NPN transistor type, surface mount configuration, and SC-70/SOT-323 package compatibility. The voltage rating of 12V is slightly below the 15V specification of the original part but remains within acceptable operating margins for most applications. The frequency capability of 8GHz is marginally below the 9GHz specification. Power dissipation of 580mW exceeds the 500mW requirement. Current handling of 80mA is below the 120mA maximum of the original part. This part is active and ROHS3 compliant with MSL 1 rating, ensuring long-term availability and environmental compliance.

2SC2714-Y(TE85L,F) (Toshiba Semiconductor and Storage)

This part is listed as a manufacturer-recommended substitute in the original part documentation. It is active and ROHS3 compliant. However, the frequency capability of 550MHz is significantly below the 9GHz requirement, and the maximum collector current of 20mA is substantially below the 120mA specification. The package is TO-236-3/SC-59/SOT-23-3, which differs from the SC-70/SOT-323 configuration. This part is suitable only for applications where frequency and current requirements are substantially lower than the original specification.

BFP740H6327XTSA1 (Infineon Technologies)

This part is listed as a manufacturer-recommended substitute. It offers exceptional frequency capability at 42GHz, significantly exceeding the 9GHz requirement. However, the voltage rating of 4.7V is substantially below the 15V specification, and the maximum collector current of 30mA is below the 120mA requirement. The package is SC-82A/SOT-343, which differs from the SC-70/SOT-323 configuration. This part is suitable for high-frequency applications where voltage and current requirements are lower than the original specification.

BFR740L3RHE6327XTSA1 (Infineon Technologies)

This part is listed as a manufacturer-recommended substitute. It provides frequency capability of 42GHz, exceeding the 9GHz requirement. The voltage rating of 4.7V and maximum collector current of 30mA are below the BFS540,115 specifications. The package is SC-101/SOT-883, which differs from the SC-70/SOT-323 configuration. This part is suitable for high-frequency applications with lower voltage and current requirements.

PH3135-5S (MACOM Technology Solutions)

This part is listed as a manufacturer-recommended substitute. It exceeds voltage (60V), power (5W), and current (750mA) specifications substantially. Frequency and noise figure data are not provided. Package information is not provided. This part is suitable for high-power applications where voltage and current requirements exceed the original specification.

Frequently Asked Questions (FAQ)

Q1: Can BFR193WH6327XTSA1 be used as a direct replacement for BFS540,115?

BFR193WH6327XTSA1 provides the closest compatibility in terms of package (SC-70/SOT-323), transistor type (NPN), and surface mount configuration. However, the voltage rating of 12V is below the 15V specification, and the frequency of 8GHz is below the 9GHz specification. The maximum collector current of 80mA is below the 120mA requirement. Direct replacement is possible only if the application operates within these reduced electrical parameters.

Q2: What are the key differences between the substitute parts?

The substitute parts differ significantly in their electrical specifications. BFR193WH6327XTSA1 maintains similar frequency and voltage ranges to the original part. BFP740H6327XTSA1 and BFR740L3RHE6327XTSA1 offer much higher frequency capability (42GHz) but lower voltage and current ratings. 2SC2714-Y(TE85L,F) operates at much lower frequency (550MHz) but higher voltage (30V). PH3135-5S is designed for high-power applications with substantially higher voltage (60V), current (750mA), and power (5W) ratings.

Q3: Are all substitute parts ROHS3 compliant?

Yes, all substitute parts listed are ROHS3 compliant and have MSL 1 (Unlimited) moisture sensitivity level, matching the environmental compliance of the original BFS540,115.

Q4: What is the impact of package differences on substitution?

BFR193WH6327XTSA1 uses the same SC-70/SOT-323 package as the original part and can be used as a direct footprint replacement on PCBs designed for BFS540,115. Other substitute parts use different packages (SC-82A/SOT-343, SC-101/SOT-883, TO-236-3/SC-59/SOT-23-3) and require PCB layout modifications or adapter solutions.

Q5: Which substitute part is recommended for new designs?

BFR193WH6327XTSA1 is recommended for new designs requiring the closest electrical and mechanical compatibility with BFS540,115. It maintains active product status, ROHS3 compliance, and identical package configuration. Selection of other substitute parts should be based on specific application requirements that differ from the original BFS540,115 specifications.

Q6: Can frequency differences between the original part and substitutes affect circuit performance?

Yes, frequency differences directly impact RF circuit performance. BFR193WH6327XTSA1 operates at 8GHz versus the original 9GHz, which may affect gain, noise figure, and impedance matching in RF applications. BFP740H6327XTSA1 and BFR740L3RHE6327XTSA1 at 42GHz are suitable for much higher frequency applications. 2SC2714-Y(TE85L,F) at 550MHz is suitable only for lower frequency applications. Circuit re-tuning and impedance matching may be required when substituting parts with different frequency ratings.

Q7: What is the significance of voltage rating differences?

Voltage rating differences determine the maximum collector-emitter voltage the transistor can withstand. BFR193WH6327XTSA1 at 12V is below the original 15V rating, reducing the maximum operating voltage margin. BFP740H6327XTSA1 and BFR740L3RHE6327XTSA1 at 4.7V are suitable only for low-voltage applications. 2SC2714-Y(TE85L,F) at 30V and PH3135-5S at 60V exceed the original specification and are suitable for higher voltage applications.

Q8: How do current rating differences impact substitution?

Current rating differences determine the maximum collector current the transistor can handle. BFR193WH6327XTSA1 at 80mA is below the original 120mA rating. BFP740H6327XTSA1 and BFR740L3RHE6327XTSA1 at 30mA are suitable only for lower current applications. 2SC2714-Y(TE85L,F) at 20mA and PH3135-5S at 750mA represent further extremes. Application current requirements must be verified against substitute part ratings.