BFR540,215 Equivalent & Substitute Parts

Part Overview

The BFR540,215 is an RF transistor NPN type manufactured by NXP USA Inc., designed for radiofrequency applications requiring operation at 9GHz with a maximum collector-emitter breakdown voltage of 15V. This component is classified as obsolete, necessitating identification of active substitute parts that maintain functional compatibility within specified electrical and mechanical parameters. The original part is available in Surface Mount SOT-23 (TO-236AB) packaging with 1119 pieces in current inventory.

Key Parameters

Parameter	BFR540,215
Manufacturer	NXP USA Inc.
Product Status	Obsolete
Transistor Type	NPN
Voltage - Collector Emitter Breakdown (Max)	15V
Frequency - Transition	9GHz
Power - Max	500mW
Current - Collector (Ic) (Max)	120mA
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 40mA, 8V
Noise Figure (dB Typ @ f)	1.3dB ~ 2.4dB @ 900MHz
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Operating Temperature (Max)	175°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the BFR540,215 is determined by the following critical parameters:

Primary Compatibility Criteria:

Transistor Type: NPN (required match)
Mounting Type: Surface Mount (required match for PCB compatibility)
Package / Case: TO-236-3, SC-59, SOT-23-3 (required match for footprint compatibility)
Voltage - Collector Emitter Breakdown (Max): 15V or higher (required for voltage rating compatibility)
Frequency - Transition: 9GHz or higher (required for RF performance compatibility)
Power - Max: 500mW or higher (required for power dissipation compatibility)
Current - Collector (Ic) (Max): 120mA or higher (required for current handling compatibility)

Secondary Compatibility Criteria:

DC Current Gain (hFE): Minimum 100 @ 40mA, 8V or equivalent performance
Noise Figure: 1.3dB ~ 2.4dB @ 900MHz or lower
Operating Temperature: 175°C or higher
RoHS Compliance: ROHS3 Compliant (regulatory requirement)
Moisture Sensitivity Level: 1 (Unlimited) or equivalent

Substitute parts are grouped based on adherence to these parameters. Parts that meet all primary criteria are classified as direct substitutes. Parts that meet primary criteria but differ in secondary parameters are classified as functional alternatives with noted parameter variations.

Parameter Comparison

Parameter	BFR540,215	BFR193E6327HTSA1	BFR35APE6327HTSA1	BFR92PE6327HTSA1	BFU550AR	BFR106E6327HTSA1
Manufacturer	NXP USA Inc.	Infineon Technologies	Infineon Technologies	Infineon Technologies	NXP USA Inc.	Infineon Technologies
Product Status	Obsolete	Active	Active	Active	Active	Active
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	15V	12V	15V	15V	12V	15V
Frequency - Transition	9GHz	8GHz	5GHz	5GHz	11GHz	5GHz
Power - Max	500mW	580mW	280mW	280mW	450mW	700mW
Current - Collector (Ic) (Max)	120mA	80mA	45mA	45mA	50mA	210mA
DC Current Gain (hFE) (Min) @ Ic, Vce	100 @ 40mA, 8V	70 @ 30mA, 8V	70 @ 15mA, 8V	70 @ 15mA, 8V	60 @ 15mA, 8V	70 @ 70mA, 8V
Noise Figure (dB Typ @ f)	1.3dB ~ 2.4dB @ 900MHz	1dB ~ 1.6dB @ 900MHz ~ 1.8GHz	1.4dB ~ 2dB @ 900MHz ~ 1.8GHz	1.4dB ~ 2dB @ 900MHz ~ 1.8GHz	0.6dB @ 900MHz	1.8dB ~ 3dB @ 900MHz ~ 1.8Ghz
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Operating Temperature (Max)	175°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)	150°C (TJ)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

BFR193E6327HTSA1 (Infineon Technologies) is the primary substitute for BFR540,215. This part maintains the same SOT-23 package footprint, NPN transistor type, and Surface Mount configuration. The BFR193E6327HTSA1 operates at 8GHz transition frequency, which is within the operational range of the original part. Voltage rating is 12V, which is lower than the original 15V specification. Power dissipation capability is 580mW, exceeding the original 500mW requirement. Maximum collector current is 80mA, below the original 120mA specification. This part is currently in active production status with 9400 pieces in inventory. RoHS3 compliance and MSL-1 rating are maintained.

BFU550AR (NXP USA Inc.) is an alternative substitute from the original manufacturer. This part maintains the same SOT-23 package, NPN type, and Surface Mount configuration. Transition frequency is 11GHz, exceeding the original 9GHz specification. Voltage rating is 12V, lower than the original 15V. Power dissipation is 450mW, below the original 500mW. Maximum collector current is 50mA, significantly below the original 120mA specification. This part is in active production with 3400 pieces in inventory and includes AEC-Q101 automotive qualification.

Functional Alternatives (Conditional Compatibility):

BFR35APE6327HTSA1 and BFR92PE6327HTSA1 (Infineon Technologies) are functionally equivalent parts with identical electrical specifications. Both maintain 15V voltage rating matching the original part. However, transition frequency is 5GHz, below the original 9GHz specification. Power dissipation is 280mW, below the original 500mW requirement. Maximum collector current is 45mA, significantly below the original 120mA specification. These parts are suitable for applications where lower frequency operation is acceptable.

BFR106E6327HTSA1 (Infineon Technologies) provides the highest power dissipation capability at 700mW and highest maximum collector current at 210mA. Voltage rating matches the original at 15V. Transition frequency is 5GHz, below the original 9GHz specification. This part is suitable for applications prioritizing power handling over frequency performance.

Compliance and Certification Status:

All substitute parts maintain ROHS3 compliance and MSL-1 (Unlimited) moisture sensitivity rating, ensuring regulatory compatibility with the original part. BFU550AR includes AEC-Q101 automotive qualification, providing additional reliability assurance for automotive applications.

Frequently Asked Questions (FAQ)

Q: Can BFR193E6327HTSA1 directly replace BFR540,215 in all applications?

A: BFR193E6327HTSA1 is compatible for applications operating at 8GHz or lower frequencies. The voltage rating is 12V compared to the original 15V, which may limit use in circuits requiring the full 15V rating. Maximum collector current is 80mA versus the original 120mA, which may restrict high-current applications. Verify circuit requirements before substitution.

Q: What is the primary difference between BFR193E6327HTSA1 and BFR35APE6327HTSA1?

A: Both parts share identical electrical specifications including 15V voltage rating, 5GHz transition frequency, 280mW power dissipation, and 45mA maximum collector current. The primary difference is manufacturer designation and inventory availability. BFR193E6327HTSA1 has 9400 pieces in stock, while BFR35APE6327HTSA1 has 3706 pieces available.

Q: Why does BFU550AR have a lower voltage rating than the original BFR540,215?

A: BFU550AR is designed for 12V maximum collector-emitter breakdown voltage, compared to the original 15V specification. This reflects different design optimization priorities. BFU550AR achieves higher transition frequency (11GHz) and lower noise figure (0.6dB @ 900MHz) at the cost of reduced voltage rating. Applications requiring 15V operation must use alternative substitutes.

Q: Are all substitute parts available in the same SOT-23 package?

A: Yes, all listed substitute parts are available in TO-236-3, SC-59, SOT-23-3 package configuration, ensuring PCB footprint compatibility with the original BFR540,215. This maintains mechanical compatibility for direct board-level substitution.

Q: What is the significance of the operating temperature difference between BFR540,215 and substitute parts?

A: The original BFR540,215 operates to 175°C (TJ), while most substitute parts operate to 150°C (TJ). This 25°C difference may impact thermal margin in high-temperature applications. Applications operating near 150°C should verify thermal performance with substitute parts.

Q: Which substitute part provides the best noise figure performance?

A: BFU550AR provides the lowest noise figure at 0.6dB @ 900MHz, compared to the original BFR540,215 specification of 1.3dB ~ 2.4dB @ 900MHz. This represents improved noise performance for RF applications requiring low-noise operation.

Q: Can BFR106E6327HTSA1 be used in high-power applications?

A: BFR106E6327HTSA1 provides the highest power dissipation capability at 700mW and highest maximum collector current at 210mA among all listed substitutes. However, transition frequency is 5GHz, below the original 9GHz specification. This part is suitable for applications prioritizing power handling over frequency performance, provided circuit frequency requirements do not exceed 5GHz.

Q: What is the inventory status of substitute parts?

A: BFR106E6327HTSA1 has the highest inventory availability at 1,000,300 pieces. BFR193E6327HTSA1 has 9400 pieces, BFU550AR has 3400 pieces, and BFR35APE6327HTSA1 has 3706 pieces in current stock. BFR92PE6327HTSA1 has 305,200 pieces available.

Q: Are all substitute parts RoHS compliant?

A: Yes, all listed substitute parts maintain ROHS3 compliance status, ensuring regulatory compatibility with the original BFR540,215 for applications subject to RoHS requirements.

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