BFS 17P E6433 Equivalent & Substitute Parts

Part Overview

The BFS 17P E6433 is an RF transistor NPN manufactured by Infineon Technologies, designed for high-frequency applications up to 1.4GHz. This surface mount device operates at 15V collector-emitter breakdown voltage with a maximum power dissipation of 280mW and collector current of 25mA. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in circuit applications, or when design requirements permit operation within the specified parameter ranges of alternative devices.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	-
Voltage - Collector Emitter Breakdown (Max)	15V	V
Frequency - Transition	1.4GHz	GHz
Power - Max	280mW	mW
Current - Collector (Ic) (Max)	25mA	mA
DC Current Gain (hFE) (Min) @ Ic, Vce	40 @ 2mA, 1V	-
Noise Figure (dB Typ @ f)	3.5dB ~ 5dB @ 800MHz	dB
Operating Temperature (TJ)	150°C	°C
Mounting Type	Surface Mount	-
Package / Case	TO-236-3, SC-59, SOT-23-3	-
RoHS Status	ROHS3 Compliant	-
MSL	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution eligibility for the BFS 17P E6433 is determined by the following critical parameters:

Primary Substitution Criteria:

Transistor Type: NPN
Package / Case: TO-236-3, SC-59, SOT-23-3 (surface mount compatibility)
Voltage - Collector Emitter Breakdown (Max): Equal to or greater than 15V
Frequency - Transition: Equal to or greater than 1.4GHz (for RF performance maintenance)
Power - Max: Equal to or greater than 280mW
Current - Collector (Ic) (Max): Equal to or greater than 25mA
Operating Temperature: 150°C (TJ) maximum
RoHS3 Compliance: Required
MSL: 1 (Unlimited)

Substitution Categories:

Category 1: Direct RF Performance Upgrade Parts with higher frequency capability, higher power rating, and higher collector current while maintaining or exceeding voltage specifications. These parts operate within the same package family and provide enhanced performance margins.

Category 2: Voltage-Rated Alternatives Parts with higher collector-emitter breakdown voltage ratings, suitable for applications requiring increased voltage headroom while maintaining RF frequency performance.

Category 3: Package-Compatible Alternatives Parts sharing the same surface mount package footprint (SOT-23-3) with comparable electrical characteristics, allowing mechanical and thermal compatibility.

Parameter Comparison

Parameter	BFS 17P E6433	BFR106E6327HTSA1	SMMBTH10-4LT3G	HFA3134IHZ96	MRF455
Manufacturer	Infineon	Infineon	onsemi	Intersil	MACOM
Transistor Type	NPN	NPN	NPN	2 NPN (Dual)	NPN
Voltage - Collector Emitter Breakdown (Max)	15V	15V	25V	9V	18V
Frequency - Transition	1.4GHz	5GHz	800MHz	8.5GHz	-
Power - Max	280mW	700mW	225mW	-	60W
Current - Collector (Ic) (Max)	25mA	210mA	-	26mA	15A
DC Current Gain (hFE) (Min) @ Ic, Vce	40 @ 2mA, 1V	70 @ 70mA, 8V	120 @ 4mA, 10V	48 @ 10mA, 2V	10 @ 5A, 5V
Operating Temperature (TJ)	150°C	150°C	-55°C ~ 150°C	150°C	-
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Chassis 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	SOT-23-6	211-07
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	-	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

BFR106E6327HTSA1 (Infineon Technologies)

This part qualifies as a direct upgrade substitute. It maintains identical voltage rating (15V), package form factor (SOT-23-3), and compliance certifications (ROHS3, MSL 1). The BFR106E6327HTSA1 provides enhanced RF performance with 5GHz transition frequency versus 1.4GHz, increased power dissipation (700mW versus 280mW), and significantly higher collector current capability (210mA versus 25mA). This part is suitable for applications requiring higher frequency operation or increased power handling within the same physical footprint. Product status is active with extensive inventory availability.

SMMBTH10-4LT3G (onsemi)

This part provides voltage-rated substitution with 25V collector-emitter breakdown versus 15V, offering increased voltage margin. However, transition frequency is reduced to 800MHz, below the 1.4GHz specification of the main part. Power dissipation is 225mW, below the 280mW rating. This part is suitable only for applications where lower frequency operation is acceptable and higher voltage headroom is required. Package compatibility is maintained (SOT-23-3). Product status is active with RoHS3 compliance and MSL 1 rating.

HFA3134IHZ96 (Intersil)

This part is a dual NPN configuration in SOT-23-6 package, not directly pin-compatible with the single transistor SOT-23-3 package of the main part. Voltage rating is 9V, below the 15V specification. Transition frequency is 8.5GHz, exceeding RF performance requirements. Collector current is 26mA, comparable to the 25mA specification. This part is not recommended as a direct substitute due to package incompatibility and insufficient voltage rating.

MRF455 (MACOM Technology Solutions)

This part operates in a different application class with chassis mount packaging (211-07) versus surface mount (SOT-23-3). Collector current capability is 15A with 60W power dissipation, designed for high-power RF applications. Voltage rating is 18V. This part is not suitable as a substitute due to fundamental package and mounting type differences, and application class mismatch.

Recommended Primary Substitute: BFR106E6327HTSA1 for applications requiring enhanced RF performance and power handling within the same package footprint.

Recommended Alternative Substitute: SMMBTH10-4LT3G only when higher voltage operation is required and lower frequency operation is acceptable.

Frequently Asked Questions (FAQ)

Q1: Can BFR106E6327HTSA1 be used as a direct replacement for BFS 17P E6433?

A: Yes, BFR106E6327HTSA1 qualifies as a direct substitute. Both parts share identical collector-emitter breakdown voltage (15V), surface mount package (SOT-23-3), RoHS3 compliance, and MSL 1 rating. The BFR106E6327HTSA1 provides enhanced RF performance with higher transition frequency (5GHz versus 1.4GHz), increased power dissipation (700mW versus 280mW), and higher collector current (210mA versus 25mA). Pin configuration and footprint are compatible.

Q2: What are the key differences between BFS 17P E6433 and SMMBTH10-4LT3G?

A: Both parts share the SOT-23-3 package and surface mount configuration. SMMBTH10-4LT3G provides higher voltage rating (25V versus 15V) but operates at lower transition frequency (800MHz versus 1.4GHz) and lower power dissipation (225mW versus 280mW). Substitution is valid only when lower frequency operation is acceptable and higher voltage headroom is required.

Q3: Why is HFA3134IHZ96 not recommended as a substitute?

A: HFA3134IHZ96 is a dual NPN transistor in SOT-23-6 package, not compatible with the single transistor SOT-23-3 footprint of BFS 17P E6433. Additionally, the 9V voltage rating is below the 15V specification. Package incompatibility and insufficient voltage rating disqualify this part as a direct substitute.

Q4: Is MRF455 suitable for replacing BFS 17P E6433?

A: No. MRF455 is a chassis mount device (211-07 package) designed for high-power RF applications (60W, 15A), fundamentally different from the surface mount, low-power application class of BFS 17P E6433. Package and mounting type incompatibility, combined with application class mismatch, make this part unsuitable as a substitute.

Q5: What compliance certifications must substitute parts maintain?

A: All substitute parts must maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level to ensure regulatory compliance and manufacturing process compatibility with the original BFS 17P E6433 specification.

Q6: Can frequency differences affect substitution validity?

A: Frequency differences are acceptable when the substitute part meets or exceeds the transition frequency requirement (1.4GHz minimum). Higher frequency capability provides performance margin. Lower frequency operation is acceptable only when circuit design permits reduced RF performance, and this must be verified by circuit analysis.

Q7: What package considerations apply to substitution?

A: Surface mount package compatibility is critical. BFS 17P E6433 uses TO-236-3, SC-59, SOT-23-3 package. Substitute parts must use identical package designation to ensure PCB footprint compatibility, solder reflow process compatibility, and thermal management equivalence. Package changes require PCB redesign.

Q8: Are there inventory or lead time considerations for substitutes?

A: BFR106E6327HTSA1 has extensive inventory (1,000,300 pcs), providing supply security. SMMBTH10-4LT3G has limited inventory (994 pcs). BFS 17P E6433 has 757 pcs in stock. Inventory levels should be verified with suppliers for production planning purposes.

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