BFG92A/X,215 RF Transistor NPN Equivalent & Substitute Parts

Part Overview

The BFG92A/X,215 is an RF transistor NPN manufactured by NXP USA Inc., designed for RF applications operating at 5GHz with a maximum collector-emitter breakdown voltage of 15V and maximum power dissipation of 400mW. The device is packaged in SOT-143B surface mount configuration.

This part is classified as Obsolete in current product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this RF transistor.

Key Parameters

Parameter	Value	Unit
Manufacturer	NXP USA Inc.	—
Part Number	BFG92A/X,215	—
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	15V	V
Frequency - Transition	5GHz	GHz
Noise Figure (Typ)	2dB ~ 3dB @ 1GHz ~ 2GHz	dB
Power - Max	400mW	mW
DC Current Gain (hFE) (Min)	65 @ 15mA, 10V	—
Current - Collector (Ic) (Max)	25mA	mA
Operating Temperature (Max)	175°C	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-143B	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BFG92A/X,215 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: NPN (required match)
Mounting Type: Surface Mount (required match)
Voltage - Collector Emitter Breakdown (Max): Must equal or exceed 15V
Frequency - Transition: Must support 5GHz operation or higher
Power - Max: Must equal or exceed 400mW
DC Current Gain (hFE): Minimum 65 at specified operating conditions
Current - Collector (Ic) (Max): Must equal or exceed 25mA
Operating Temperature: Must support 175°C or higher
RoHS Compliance: ROHS3 Compliant (required match)

Secondary Considerations:

Package compatibility: SOT-143B or equivalent surface mount packages
Noise Figure performance at RF frequencies
Moisture Sensitivity Level: MSL 1 (Unlimited)

The substitute parts listed below are grouped based on their ability to meet these electrical specifications within the RF transistor category. Parts are presented in order of manufacturer recommendation.

Parameter Comparison

Parameter	BFG92A/X,215 (Main)	2SC5488A-TL-H	BFP620FH7764XTSA1	BFP640ESDH6327XTSA1	HFA3134IHZ96	KSP10TA	MMBTH10LT3G	NSVF4009SG4T1G
Manufacturer	NXP USA Inc.	onsemi	Infineon Technologies	Infineon Technologies	Intersil	Fairchild Semiconductor	onsemi	onsemi
Transistor Type	NPN	NPN	NPN	NPN	2 NPN (Dual)	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	15V	10V	2.8V	4.7V	9V	25V	25V	3.5V
Frequency - Transition	5GHz	7GHz	65GHz	46GHz	8.5GHz	650MHz	650MHz	25GHz
Noise Figure (Typ)	2dB ~ 3dB @ 1GHz ~ 2GHz	1dB @ 1GHz	0.7dB ~ 1.3dB @ 1.8GHz ~ 6GHz	0.6dB ~ 2dB @ 150MHz ~ 10GHz	2.4dB @ 1GHz	—	—	1.1dB @ 2GHz
Power - Max	400mW	100mW	185mW	200mW	—	350mW	225mW	120mW
DC Current Gain (hFE) (Min)	65 @ 15mA, 10V	90 @ 20mA, 5V	110 @ 50mA, 1.5V	110 @ 30mA, 3V	48 @ 10mA, 2V	60 @ 4mA, 10V	60 @ 4mA, 10V	50 @ 5mA, 1V
Current - Collector (Ic) (Max)	25mA	70mA	80mA	50mA	26mA	—	—	40mA
Operating Temperature (Max)	175°C	150°C	150°C	150°C	150°C	150°C	150°C	150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Through Hole	Surface Mount	Surface Mount
Package / Case	SOT-143B	3-SSFP	4-TSFP	SOT-343	SOT-23-6	TO-92-3	SOT-23-3	SC-82FL/MCPH4
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Voltage Compatibility Analysis:

The BFG92A/X,215 operates at a maximum collector-emitter breakdown voltage of 15V. Substitute parts must be evaluated against this specification:

2SC5488A-TL-H (10V max): Does not meet voltage requirement. Suitable only for applications with reduced voltage headroom.
BFP620FH7764XTSA1 (2.8V max): Does not meet voltage requirement. Restricted to low-voltage RF applications.
BFP640ESDH6327XTSA1 (4.7V max): Does not meet voltage requirement. Restricted to low-voltage RF applications.
HFA3134IHZ96 (9V max): Does not meet voltage requirement. Suitable for reduced voltage applications.
KSP10TA (25V max): Exceeds voltage requirement. Suitable for higher voltage applications.
MMBTH10LT3G (25V max): Exceeds voltage requirement. Suitable for higher voltage applications.
NSVF4009SG4T1G (3.5V max): Does not meet voltage requirement. Restricted to low-voltage RF applications.

Frequency and Power Considerations:

All substitute parts listed support RF operation at or above 5GHz, with the exception of KSP10TA (650MHz) and MMBTH10LT3G (650MHz), which are limited to lower frequency applications.

Power dissipation requirements: The BFG92A/X,215 supports 400mW maximum. Only KSP10TA (350mW) approaches this specification. All other substitutes operate at reduced power levels (100mW to 225mW).

Product Status and Compliance:

All substitute parts are classified as Active in product status, ensuring ongoing availability and support. All substitute parts maintain ROHS3 Compliance, matching the environmental compliance requirement of the main part.

Operating Temperature:

The BFG92A/X,215 operates to 175°C maximum junction temperature. All substitute parts are rated to 150°C maximum, representing a 25°C reduction in thermal capability. Applications requiring operation above 150°C cannot use these substitutes without thermal management modifications.

Mounting Type Consideration:

KSP10TA is a through-hole device (TO-92-3 package), while the BFG92A/X,215 is surface mount (SOT-143B). Through-hole substitution requires PCB redesign and is not recommended for direct replacement in existing surface mount layouts.

Frequently Asked Questions (FAQ)

Q1: Can 2SC5488A-TL-H directly replace BFG92A/X,215 in a 15V circuit?

A: No. The 2SC5488A-TL-H has a maximum collector-emitter breakdown voltage of 10V, which is insufficient for circuits designed to operate at 15V. Using this part in a 15V circuit will result in device failure due to voltage overstress.

Q2: Which substitute part best matches the voltage specification of BFG92A/X,215?

A: Neither substitute part exactly matches the 15V specification. KSP10TA and MMBTH10LT3G both support 25V, exceeding the requirement. For applications requiring precise 15V operation, design verification is necessary to confirm that the higher voltage rating does not introduce unintended circuit behavior.

Q3: What is the impact of reduced maximum power dissipation in substitute parts?

A: The BFG92A/X,215 supports 400mW maximum power dissipation. Most substitute parts operate at 100mW to 225mW. Applications requiring high power dissipation must verify that substitute parts can handle the thermal load. Thermal management modifications may be necessary.

Q4: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed, except KSP10TA, are explicitly marked as ROHS3 Compliant. KSP10TA RoHS status is not specified in the provided data. Compliance verification is required before use in RoHS-regulated applications.

Q5: Can KSP10TA be used as a direct replacement for BFG92A/X,215?

A: No. KSP10TA is a through-hole device (TO-92-3 package), while BFG92A/X,215 is surface mount (SOT-143B). Direct replacement requires PCB redesign. Additionally, KSP10TA operates at 650MHz, which is below the 5GHz specification of the main part.

Q6: What is the significance of the operating temperature difference between BFG92A/X,215 and substitute parts?

A: The BFG92A/X,215 operates to 175°C maximum junction temperature, while all substitute parts are rated to 150°C maximum. This 25°C difference may impact performance in high-temperature applications. Thermal analysis is required to confirm suitability in temperature-critical designs.

Q7: Which substitute part offers the best noise figure performance?

A: BFP640ESDH6327XTSA1 offers noise figure of 0.6dB ~ 2dB across 150MHz ~ 10GHz, which is superior to the BFG92A/X,215 specification of 2dB ~ 3dB at 1GHz ~ 2GHz. However, this part does not meet the 15V voltage requirement.

Q8: Are there package compatibility considerations for surface mount substitution?

A: Yes. The BFG92A/X,215 uses SOT-143B packaging. Substitute parts use different surface mount packages (3-SSFP, 4-TSFP, SOT-343, SOT-23-6, SOT-23-3, SC-82FL/MCPH4). PCB footprint redesign is required for any substitute part. Verify pin configuration and lead spacing before layout modification.

Q9: What is the DC current gain (hFE) comparison between the main part and substitutes?

A: The BFG92A/X,215 specifies hFE minimum of 65 @ 15mA, 10V. Substitute parts show higher hFE values: 2SC5488A-TL-H (90), BFP620FH7764XTSA1 (110), BFP640ESDH6327XTSA1 (110), HFA3134IHZ96 (48), KSP10TA (60), MMBTH10LT3G (60), NSVF4009SG4T1G (50). Higher hFE may require bias network adjustment in the application circuit.

Q10: Is NSVF4009SG4T1G suitable for automotive applications?

A: NSVF4009SG4T1G is qualified to AEC-Q101 automotive standard and carries automotive grade designation. However, this part does not meet the 15V voltage requirement of the BFG92A/X,215. Automotive qualification does not override electrical specification mismatches.

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