BFP640E6327BTSA1 Equivalent & Substitute Parts

Part Overview

The BFP640E6327BTSA1 is an RF transistor NPN manufactured by Infineon Technologies, designed for high-frequency applications up to 40GHz. This surface mount device operates at 4.5V collector-emitter breakdown voltage with 200mW maximum power dissipation and is housed in a PG-SOT343-3D package (SC-82A, SOT-343).

The BFP640E6327BTSA1 is classified as obsolete. Substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements. The following equivalent and substitute transistors are qualified alternatives based on electrical and mechanical parameter compatibility.

Key Parameters

Parameter	BFP640E6327BTSA1
Manufacturer	Infineon Technologies
Transistor Type	NPN
Voltage - Collector Emitter Breakdown (Max)	4.5V
Frequency - Transition	40GHz
Power - Max	200mW
Current - Collector (Ic) (Max)	50mA
Noise Figure (dB Typ @ f)	0.65dB ~ 1.2dB @ 1.8GHz ~ 6GHz
Gain	24dB
DC Current Gain (hFE) (Min) @ Ic, Vce	110 @ 30mA, 3V
Operating Temperature (TJ)	150°C
Mounting Type	Surface Mount
Package / Case	SC-82A, SOT-343
Supplier Device Package	PG-SOT343-3D
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the BFP640E6327BTSA1 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Transistor Type: NPN (mandatory match)
Mounting Type: Surface Mount (mandatory match)
Voltage - Collector Emitter Breakdown (Max): Must equal or exceed 4.5V
Frequency - Transition: Must support operation at or above 40GHz for direct RF performance equivalence, or lower frequency operation for reduced-bandwidth applications
Power - Max: Must equal or exceed 200mW
Current - Collector (Ic) (Max): Must equal or exceed 50mA
Operating Temperature: Must support 150°C or higher
Moisture Sensitivity Level: MSL 1 (Unlimited) preferred for compatibility

Secondary Compatibility Factors:

Package / Case: SOT-343 or equivalent surface mount packages (SC-70, SOT-23-3, 3-SSFP acceptable)
Product Status: Active status preferred for long-term availability
RoHS/REACH Compliance: ROHS3 Compliant and REACH Unaffected preferred

The substitute parts listed below meet the mandatory criteria for NPN transistor type and surface mount configuration. Frequency, power, and current ratings vary based on application requirements. Parts with lower frequency ratings (7GHz, 3.2GHz, 2GHz, 650MHz, 600MHz) are suitable for applications operating below 40GHz.

Parameter Comparison

Parameter	BFP640E6327BTSA1	2SC5065-Y(TE85L,F)	2SC5488A-TL-H	BFS17NQTA	KST10MTF	MMBT5179	MMBT918LT1G	MRF422	NSVMMBTH10LT1G
Manufacturer	Infineon	Toshiba	onsemi	Diodes Inc.	onsemi	onsemi	onsemi	MACOM	onsemi
Transistor Type	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN	NPN
Voltage - Collector Emitter Breakdown (Max)	4.5V	12V	10V	11V	25V	12V	15V	35V	25V
Frequency - Transition	40GHz	7GHz	7GHz	3.2GHz	650MHz	2GHz	600MHz	—	650MHz
Power - Max	200mW	100mW	100mW	310mW	350mW	225mW	225mW	150W	225mW
Current - Collector (Ic) (Max)	50mA	30mA	70mA	50mA	—	50mA	50mA	20A	—
Operating Temperature (TJ)	150°C	125°C	150°C	-55°C ~ 150°C	—	-55°C ~ 150°C	-55°C ~ 150°C	—	-55°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Chassis Mount	Surface Mount
Package / Case	SC-82A, SOT-343	SC-70, SOT-323	SC-81, 3-SSFP	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	211-11, Style 2	TO-236-3, SC-59, SOT-23-3
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	—	REACH Unaffected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct RF Performance Equivalence (40GHz Operation):

No substitute part in the provided list maintains the 40GHz frequency specification of the BFP640E6327BTSA1. The BFP640E6327BTSA1 operates at a significantly higher frequency than all listed alternatives. Direct replacement at 40GHz is not available among the provided substitutes.

For Reduced-Bandwidth RF Applications (Below 40GHz):

2SC5065-Y(TE85L,F) (Toshiba Semiconductor and Storage)

Frequency: 7GHz; Power: 100mW; Current: 30mA
Product Status: Active; RoHS3 Compliant; REACH Unaffected
Suitable for applications operating at 7GHz and below
Lower power and current ratings require circuit verification

2SC5488A-TL-H (onsemi)

Frequency: 7GHz; Power: 100mW; Current: 70mA
Product Status: Active; RoHS3 Compliant; REACH Unaffected; Operating Temperature: 150°C
Suitable for applications operating at 7GHz and below
Matches operating temperature of original part

BFS17NQTA (Diodes Incorporated)

Frequency: 3.2GHz; Power: 310mW; Current: 50mA
Product Status: Active; RoHS3 Compliant; REACH Unaffected
Operating Temperature Range: -55°C ~ 150°C
Higher power rating than original; suitable for lower-frequency applications

For Lower-Frequency Applications (Below 3GHz):

MMBT5179 (onsemi)

Frequency: 2GHz; Power: 225mW; Current: 50mA
Product Status: Active; RoHS3 Compliant; REACH Unaffected
Operating Temperature Range: -55°C ~ 150°C

MMBT918LT1G (onsemi)

Frequency: 600MHz; Power: 225mW; Current: 50mA
Product Status: Active; RoHS3 Compliant; REACH Unaffected
Operating Temperature Range: -55°C ~ 150°C

KST10MTF (onsemi)

Frequency: 650MHz; Power: 350mW
Product Status: Active; RoHS3 Compliant; REACH Unaffected
Suitable for low-frequency RF and switching applications

NSVMMBTH10LT1G (onsemi)

Frequency: 650MHz; Power: 225mW
Product Status: Active; RoHS3 Compliant; REACH Unaffected
Operating Temperature Range: -55°C ~ 150°C

For High-Power Applications (Non-RF):

MRF422 (MACOM Technology Solutions)

Power: 150W; Current: 20A; Voltage: 35V
Product Status: Active; RoHS3 Compliant
Chassis Mount package (211-11, Style 2)
Not suitable for surface mount RF applications; included for reference only

Selection Criteria Summary:

All substitute parts listed are NPN transistors with surface mount configurations and MSL 1 (Unlimited) moisture sensitivity. All active substitutes are ROHS3 Compliant and REACH Unaffected. Selection depends on required frequency of operation, power dissipation, and collector current specifications for the target application. Package compatibility must be verified for PCB layout integration.

Frequently Asked Questions (FAQ)

Q: Can 2SC5065-Y(TE85L,F) directly replace BFP640E6327BTSA1 in a 40GHz circuit?

A: No. The 2SC5065-Y(TE85L,F) operates at 7GHz maximum frequency, which is significantly below the 40GHz specification of the BFP640E6327BTSA1. This substitute is suitable only for applications operating at 7GHz and below.

Q: What is the primary limitation when substituting the BFP640E6327BTSA1?

A: The BFP640E6327BTSA1 operates at 40GHz, which is substantially higher than all provided substitute parts. No substitute in the list maintains this frequency specification. Substitutes are available only for applications requiring lower operating frequencies.

Q: Are all substitute parts RoHS3 Compliant?

A: All active substitute parts listed (2SC5065-Y(TE85L,F), 2SC5488A-TL-H, BFS17NQTA, KST10MTF, MMBT5179, MMBT918LT1G, NSVMMBTH10LT1G) are ROHS3 Compliant. MRF422 is also ROHS3 Compliant. RoHS compliance status is not specified for the original BFP640E6327BTSA1.

Q: Which substitute part has the highest power rating?

A: MRF422 has the highest power rating at 150W. However, MRF422 is a chassis mount device, not a surface mount component, and is not suitable for PCB integration with the original BFP640E6327BTSA1 footprint. Among surface mount substitutes, BFS17NQTA offers 310mW, which exceeds the original 200mW specification.

Q: Can I use MMBT918LT1G as a substitute for low-frequency applications?

A: Yes. MMBT918LT1G is an active product with 600MHz frequency, 225mW power, 50mA collector current, and operating temperature range of -55°C ~ 150°C. It is ROHS3 Compliant and REACH Unaffected. It is suitable for applications operating at 600MHz and below.

Q: What is the package compatibility consideration?

A: The original BFP640E6327BTSA1 uses SC-82A, SOT-343 package (PG-SOT343-3D). Most substitutes use SC-70, SOT-323, or SOT-23-3 packages. PCB layout and footprint modifications may be required. MRF422 uses a 211-11 chassis mount package and is not compatible with surface mount PCB layouts.

Q: Are all substitute parts available in active production status?

A: Yes. All substitute parts listed (except the original BFP640E6327BTSA1, which is obsolete) are classified as Active products, ensuring long-term availability and continued manufacturing support.

Q: Which substitute offers the best match for operating temperature?

A: 2SC5488A-TL-H matches the original operating temperature specification of 150°C (TJ). Other substitutes offer extended temperature ranges (-55°C ~ 150°C), which provide broader operational capability.

Q: Is the BFS17NQTA suitable for RF applications?

A: BFS17NQTA operates at 3.2GHz maximum frequency and is suitable for RF applications below 3.2GHz. It is not suitable for applications requiring 40GHz operation or frequencies above 3.2GHz.

Q: What inventory availability exists for substitute parts?

A: Inventory levels vary: 2SC5065-Y(TE85L,F) has 1930 pcs; 2SC5488A-TL-H has 11541 pcs; BFS17NQTA has 24300 pcs; KST10MTF has 391101 pcs; MMBT5179 has 2400 pcs; MMBT918LT1G has 60200 pcs; MRF422 has 1110 pcs; NSVMMBTH10LT1G has 30200 pcs. KST10MTF and MMBT918LT1G offer the highest stock levels.

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