PRF949,115 RF Transistor NPN Equivalent & Substitute Parts

Part Overview

The PRF949,115 is an RF transistor NPN manufactured by NXP USA Inc., designed for high-frequency applications operating at 9GHz with a maximum collector-emitter breakdown voltage of 10V and power dissipation of 150mW. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The part is housed in an SC-75 surface mount package and is ROHS3 compliant with unlimited moisture sensitivity rating.

Key Parameters

Parameter	Value
Transistor Type	NPN
Voltage - Collector Emitter Breakdown (Max)	10V
Frequency - Transition	9GHz
Power - Max	150mW
Current - Collector (Ic) (Max)	50mA
DC Current Gain (hFE) (Min)	100 @ 5mA, 6V
Noise Figure (dB Typ @ f)	1.5dB ~ 2.5dB @ 1GHz
Operating Temperature (TJ)	150°C
Mounting Type	Surface Mount
Package / Case	SC-75, SOT-416
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the PRF949,115 is determined by the following critical parameters: transistor type (NPN), maximum collector-emitter breakdown voltage, transition frequency capability, maximum power dissipation, maximum collector current, and surface mount packaging. The substitute parts listed are grouped based on their ability to operate within or exceed the electrical specifications of the original part while maintaining compatibility with surface mount assembly processes.

The key substitution criteria are:

Transistor Type: NPN configuration required
Voltage Rating: Minimum 10V collector-emitter breakdown voltage
Frequency: Minimum 9GHz transition frequency capability
Power Dissipation: Minimum 150mW capability
Current Handling: Minimum 50mA collector current
Mounting: Surface mount technology
Compliance: ROHS3 compliant

Parameter Comparison

Parameter	PRF949,115 (NXP)	BFP405H6327XTSA1 (Infineon)	BFR106E6327HTSA1 (Infineon)	BFR360FH6327XTSA1 (Infineon)	BFR380L3E6327XTMA1 (Infineon)	MT3S16U(TE85L,F) (Toshiba)
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	10V	5V	15V	9V	9V	5V
Frequency - Transition	9GHz	25GHz	5GHz	14GHz	14GHz	4GHz
Power - Max	150mW	75mW	700mW	210mW	380mW	100mW
Current - Collector (Ic) (Max)	50mA	25mA	210mA	35mA	80mA	60mA
DC Current Gain (hFE) (Min)	100 @ 5mA, 6V	60 @ 5mA, 4V	70 @ 70mA, 8V	90 @ 15mA, 3V	90 @ 40mA, 3V	80 @ 5mA, 1V
Operating Temperature (TJ)	150°C	150°C	150°C	150°C	150°C	125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-75, SOT-416	SC-82A, SOT-343	TO-236-3, SC-59, SOT-23-3	SOT-723	SC-101, SOT-883	SC-70, SOT-323
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant

Engineering Selection Recommendations

BFR360FH6327XTSA1 (Infineon Technologies) provides the closest electrical alignment to the PRF949,115. This part operates at 9V collector-emitter breakdown voltage (within 1V of the original), supports 14GHz transition frequency (exceeding the 9GHz requirement), and delivers 210mW power dissipation (exceeding the 150mW requirement). The part is active in production status, ROHS3 compliant, and housed in a SOT-723 surface mount package. This substitute is suitable for direct replacement in applications where the lower voltage rating (9V vs. 10V) is acceptable.

BFR380L3E6327XTMA1 (Infineon Technologies) offers enhanced performance specifications with 9V collector-emitter breakdown voltage, 14GHz transition frequency, and 380mW power dissipation capability. Maximum collector current of 80mA exceeds the original 50mA specification. This part is active in production, ROHS3 compliant, and available in SC-101/SOT-883 surface mount packaging. This substitute is recommended for applications requiring higher power handling or current capacity.

BFP405H6327XTSA1 (Infineon Technologies) operates at 25GHz transition frequency, significantly exceeding the 9GHz requirement, but features a reduced 5V collector-emitter breakdown voltage and 75mW power dissipation. This part is suitable only for applications where voltage and power constraints are less critical than frequency performance. Product status is active and ROHS3 compliant.

BFR106E6327HTSA1 (Infineon Technologies) provides 15V collector-emitter breakdown voltage and 700mW power dissipation, both exceeding original specifications. However, the 5GHz transition frequency falls below the 9GHz requirement. This part is active in production, ROHS3 compliant, and available in SOT-23-3 packaging. Substitution is limited to applications where frequency requirements are reduced.

MT3S16U(TE85L,F) (Toshiba Semiconductor and Storage) operates at 4GHz transition frequency and 5V collector-emitter breakdown voltage, both below the original specifications. Maximum power dissipation is 100mW, below the 150mW requirement. This part is active in production and RoHS compliant but is not recommended as a substitute for the PRF949,115 due to insufficient electrical performance.

Frequently Asked Questions (FAQ)

Q: Can BFP405H6327XTSA1 replace PRF949,115 in all applications?

A: No. While BFP405H6327XTSA1 exceeds the 9GHz frequency requirement with 25GHz capability, its 5V collector-emitter breakdown voltage is below the original 10V specification, and its 75mW power dissipation is below the 150mW requirement. Substitution is limited to applications where these reduced ratings are acceptable.

Q: What is the primary advantage of BFR360FH6327XTSA1 over other substitutes?

A: BFR360FH6327XTSA1 provides the closest electrical match to PRF949,115 with 9V collector-emitter breakdown voltage (1V below original), 14GHz transition frequency (exceeding 9GHz requirement), and 210mW power dissipation (exceeding 150mW requirement). It maintains active production status and ROHS3 compliance.

Q: Are all substitute parts ROHS3 compliant?

A: Five of the six substitute parts are ROHS3 compliant. MT3S16U(TE85L,F) is RoHS compliant but not specifically ROHS3 certified. Verify compliance requirements for your specific application.

Q: What packaging differences exist between the original and substitutes?

A: The original PRF949,115 uses SC-75/SOT-416 packaging. Substitutes use different surface mount packages: BFP405H6327XTSA1 (SOT-343), BFR106E6327HTSA1 (SOT-23-3), BFR360FH6327XTSA1 (SOT-723), BFR380L3E6327XTMA1 (SOT-883), and MT3S16U(TE85L,F) (SOT-323). PCB layout modifications are required for any package change.

Q: Which substitute offers the highest power dissipation capability?

A: BFR106E6327HTSA1 provides 700mW maximum power dissipation, the highest among all substitutes. However, its 5GHz transition frequency is below the original 9GHz specification.

Q: Is MT3S16U(TE85L,F) suitable as a substitute?

A: MT3S16U(TE85L,F) is not recommended as a substitute. It operates at 4GHz transition frequency (below the 9GHz requirement), 5V collector-emitter breakdown voltage (below the 10V requirement), and 100mW power dissipation (below the 150mW requirement). Additionally, its maximum operating temperature is 125°C, below the original 150°C specification.

Q: Can I use BFR106E6327HTSA1 if my application requires lower frequency operation?

A: Yes, if your application operates below 5GHz, BFR106E6327HTSA1 is a viable substitute. It provides superior voltage rating (15V) and power dissipation (700mW) compared to the original. Verify that the SOT-23-3 package is compatible with your PCB layout.

Q: What is the inventory status of these substitute parts?

A: All substitute parts are currently in active production with substantial inventory: BFP405H6327XTSA1 (40,333 pcs), BFR106E6327HTSA1 (1,000,300 pcs), BFR360FH6327XTSA1 (185,129 pcs), BFR380L3E6327XTMA1 (16,016 pcs), and MT3S16U(TE85L,F) (3,991 pcs).

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