BFS17HTA Equivalent & Substitute Parts

Part Overview

The BFS17HTA is an RF transistor NPN manufactured by Diodes Incorporated, designed for radio frequency applications operating at 1.3GHz with a maximum collector-emitter breakdown voltage of 15V and power dissipation of 330mW in a surface mount SOT-23-3 package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substitute parts are selected based on compatibility across key electrical parameters including transistor type (NPN), collector-emitter breakdown voltage, frequency capability, power rating, current handling, and package form factor. Surface mount packaging compatibility is maintained across primary substitutes to ensure mechanical interchangeability.

Key Parameters

Parameter	BFS17HTA	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	15V	V
Frequency - Transition	1.3GHz	GHz
Power - Max	330mW	mW
Current - Collector (Ic) (Max)	25mA	mA
DC Current Gain (hFE) (Min) @ Ic, Vce	70 @ 2mA, 1V	—
Operating Temperature	-55°C ~ 150°C	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution logic for the BFS17HTA is based on the following criteria:

Primary Compatibility Parameters:

Transistor Type: NPN (mandatory match)
Collector-Emitter Breakdown Voltage: 15V or higher (maintains voltage margin)
Frequency Capability: 1.3GHz or higher (maintains or exceeds RF performance)
Power Dissipation: 330mW or higher (maintains thermal headroom)
Current Handling: 25mA or higher (maintains current capacity)
Mounting Type: Surface Mount (maintains assembly compatibility)
Package Form Factor: SOT-23-3 or compatible surface mount packages (maintains PCB footprint compatibility)

Compliance Parameters:

RoHS3 Compliance (environmental regulation adherence)
Moisture Sensitivity Level 1 (unlimited shelf life)

Substitute parts are grouped into two categories:

Direct Substitutes (Same Package, Enhanced Performance): Parts maintaining SOT-23-3 packaging with equal or superior electrical specifications.

Functional Equivalents (Alternative Packages, Performance Variants): Parts meeting core electrical requirements but utilizing different surface mount packages or operating at different voltage/frequency points.

Parameter Comparison

Part Number	Manufacturer	Transistor Type	Vce Breakdown (Max)	Frequency	Power (Max)	Ic (Max)	hFE (Min)	Package	Status
BFS17HTA	Diodes Incorporated	NPN	15V	1.3GHz	330mW	25mA	70 @ 2mA, 1V	SOT-23-3	Obsolete
BFS17NTA	Diodes Incorporated	NPN	11V	3.2GHz	330mW	50mA	56 @ 5mA, 10V	SOT-23-3	Active
BFR106E6327HTSA1	Infineon Technologies	NPN	15V	5GHz	700mW	210mA	70 @ 70mA, 8V	SOT-23-3	Active
BFR35APE6327HTSA1	Infineon Technologies	NPN	15V	5GHz	280mW	45mA	70 @ 15mA, 8V	SOT-23-3	Active
BFR92PE6327HTSA1	Infineon Technologies	NPN	15V	5GHz	280mW	45mA	70 @ 15mA, 8V	SOT-23-3	Active
2N918 PBFREE	Central Semiconductor Corp	NPN	15V	600MHz	200mW	50mA	20 @ 3mA, 1V	TO-72	Active
BFP405H6327XTSA1	Infineon Technologies	NPN	5V	25GHz	75mW	25mA	60 @ 5mA, 4V	SOT-343	Active
BFR360FH6327XTSA1	Infineon Technologies	NPN	9V	14GHz	210mW	35mA	90 @ 15mA, 3V	SOT-723	Active
MT3S16U(TE85L,F)	Toshiba Semiconductor and Storage	NPN	5V	4GHz	100mW	60mA	80 @ 5mA, 1V	SC-70	Active

Engineering Selection Recommendations

For Direct Replacement (Same Package, Maintained Voltage Rating):

BFR35APE6327HTSA1 and BFR92PE6327HTSA1 are functionally equivalent active parts maintaining the 15V collector-emitter breakdown voltage, SOT-23-3 package form factor, and surface mount assembly compatibility. Both parts exceed the BFS17HTA frequency capability (5GHz vs. 1.3GHz) and power rating (280mW vs. 330mW). These parts are manufactured by Infineon Technologies and carry active product status with ROHS3 compliance and MSL 1 rating.

For Enhanced Performance (Same Package, Higher Specifications):

BFR106E6327HTSA1 provides the highest performance upgrade within the SOT-23-3 package, maintaining 15V breakdown voltage while delivering 5GHz frequency capability, 700mW power dissipation, and 210mA maximum collector current. This part is suitable for applications requiring increased power handling and frequency performance.

For Lower Voltage Applications:

BFS17NTA maintains the SOT-23-3 package and Diodes Incorporated manufacturer lineage with active product status. This part operates at 11V breakdown voltage (lower than the original 15V) but provides enhanced frequency capability (3.2GHz) and current handling (50mA). Selection requires verification that 11V breakdown voltage is acceptable for the target application.

For Through-Hole Assembly:

2N918 PBFREE provides a through-hole alternative in TO-72 package with 15V breakdown voltage and 600MHz frequency capability. This part is suitable only for applications where through-hole assembly is required and frequency performance below 1.3GHz is acceptable.

For Miniaturized Designs:

BFP405H6327XTSA1 and BFR360FH6327XTSA1 offer alternative surface mount packages (SOT-343 and SOT-723 respectively) for space-constrained applications. BFP405H6327XTSA1 operates at 5V breakdown voltage with 25GHz frequency capability in SOT-343 package. BFR360FH6327XTSA1 operates at 9V breakdown voltage with 14GHz frequency capability in SOT-723 package. Both require verification of voltage and package compatibility with target circuit design.

All recommended substitutes carry ROHS3 compliance and MSL 1 moisture sensitivity rating, matching the original part's environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can BFS17NTA be used as a direct replacement for BFS17HTA?

A: BFS17NTA maintains the same SOT-23-3 package and manufacturer (Diodes Incorporated) with active product status. However, the collector-emitter breakdown voltage is reduced from 15V to 11V. Substitution is permissible only if the application circuit operates at or below 11V. The part provides enhanced frequency capability (3.2GHz vs. 1.3GHz) and higher maximum collector current (50mA vs. 25mA).

Q: What is the primary advantage of BFR35APE6327HTSA1 and BFR92PE6327HTSA1 over the original BFS17HTA?

A: Both parts maintain the 15V collector-emitter breakdown voltage and SOT-23-3 package compatibility while providing significantly enhanced frequency capability (5GHz vs. 1.3GHz) and improved power dissipation margin (280mW vs. 330mW). Both are manufactured by Infineon Technologies with active product status and full ROHS3 compliance.

Q: Why is BFP405H6327XTSA1 listed as a substitute if it operates at only 5V?

A: BFP405H6327XTSA1 is included as a functional equivalent for applications where lower voltage operation is acceptable. The part provides exceptional frequency capability (25GHz) and operates in a miniaturized SOT-343 package. Substitution requires verification that the 5V collector-emitter breakdown voltage meets circuit requirements.

Q: Can 2N918 PBFREE be used in surface mount assembly?

A: No. 2N918 PBFREE is a through-hole component in TO-72 package and is not suitable for surface mount assembly. This part is listed as a functional equivalent only for applications requiring through-hole mounting technology.

Q: What is the difference between BFR35APE6327HTSA1 and BFR92PE6327HTSA1?

A: Both parts are electrically identical with matching specifications: 15V breakdown voltage, 5GHz frequency, 280mW power rating, 45mA maximum collector current, and SOT-23-3 package. The primary difference is manufacturer designation and part numbering. Both are manufactured by Infineon Technologies and carry active product status.

Q: Is MT3S16U(TE85L,F) compatible with the original BFS17HTA package?

A: No. MT3S16U(TE85L,F) uses SC-70 package (SOT-323), which differs from the BFS17HTA SOT-23-3 package. This part is listed as a functional equivalent for applications where the smaller SC-70 package is acceptable. The part operates at 5V breakdown voltage (lower than the original 15V) and provides 4GHz frequency capability.

Q: What compliance certifications are maintained across all substitute parts?

A: All substitute parts listed carry ROHS3 compliance and Moisture Sensitivity Level 1 (unlimited shelf life), matching the original BFS17HTA environmental specifications. REACH status is unaffected for all parts.

Q: Which substitute part provides the best performance upgrade while maintaining package compatibility?

A: BFR106E6327HTSA1 provides the highest performance upgrade within the SOT-23-3 package, maintaining 15V breakdown voltage while delivering 5GHz frequency capability, 700mW power dissipation, and 210mA maximum collector current. This part is suitable for applications requiring increased power handling and frequency performance without package redesign.

Q: Can BFR360FH6327XTSA1 be used in applications requiring 15V breakdown voltage?

A: No. BFR360FH6327XTSA1 operates at 9V maximum collector-emitter breakdown voltage, which is lower than the original BFS17HTA 15V rating. Substitution requires verification that 9V breakdown voltage is acceptable for the target application circuit.

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