FPN330A Equivalent & Substitute Parts

Part Overview

The FPN330A is an NPN bipolar junction transistor manufactured by onsemi, rated for 30V collector-emitter breakdown voltage and 3A maximum collector current. This component is designed for through-hole mounting in TO-226-3 and TO-92-3 long body packages. The FPN330A is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Current - Collector (Ic) (Max)	3	A
Voltage - Collector Emitter Breakdown (Max)	30	V
Power - Max	1	W
Frequency - Transition	100	MHz
Operating Temperature Range	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-226-3, TO-92-3 Long Body	—

Substitute Part Grouping Explanation

Substitution of the FPN330A is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Transistor type must be NPN
Voltage - Collector Emitter Breakdown rating must equal or exceed 30V
Current - Collector (Ic) rating must equal or exceed 3A
Frequency - Transition must equal or exceed 100MHz
Power dissipation must equal or exceed 1W

Mechanical Compatibility Criteria:

Mounting type must be Through Hole
Package must be compatible with TO-92 or E-Line (TO-92 compatible) form factors

The ZTX849 manufactured by Diodes Incorporated meets all substitution criteria. This part exceeds the electrical specifications of the FPN330A while maintaining mechanical compatibility through its E-Line (TO-92 compatible) package configuration.

Parameter Comparison

Parameter	FPN330A (onsemi)	ZTX849 (Diodes Incorporated)	Compatibility
Transistor Type	NPN	NPN	Match
Current - Collector (Ic) (Max)	3 A	5 A	Substitute exceeds requirement
Voltage - Collector Emitter Breakdown (Max)	30 V	30 V	Match
Vce Saturation (Max)	450 mV @ 100 mA, 1 A	220 mV @ 200 mA, 5 A	Substitute has lower saturation voltage
Current - Collector Cutoff (Max)	100 nA (ICBO)	50 nA (ICBO)	Substitute has lower leakage current
DC Current Gain (hFE) (Min)	250 @ 100 mA, 2 V	100 @ 1 A, 1 V	Measured at different operating points
Power - Max	1 W	1.2 W	Substitute exceeds requirement
Frequency - Transition	100 MHz	100 MHz	Match
Operating Temperature Range	-55 to 150 °C	-55 to 200 °C	Substitute has extended upper limit
Mounting Type	Through Hole	Through Hole	Match
Package / Case	TO-226-3, TO-92-3 Long Body	E-Line-3 (TO-92 compatible)	Mechanically compatible
Product Status	Obsolete	Active	Substitute is in active production

Engineering Selection Recommendations

The ZTX849 is a direct functional substitute for the FPN330A based on the following factors:

Electrical Specifications: The ZTX849 meets or exceeds all electrical requirements of the FPN330A. The substitute provides higher maximum collector current (5A versus 3A), improved saturation voltage characteristics (220mV versus 450mV), and lower collector cutoff current (50nA versus 100nA). Transition frequency remains equivalent at 100MHz.

Mechanical Compatibility: Both components utilize through-hole mounting. The ZTX849 E-Line package is physically compatible with TO-92 form factor applications, enabling direct board-level substitution without layout modifications.

Product Status and Compliance: The FPN330A is obsolete, whereas the ZTX849 is in active production with current inventory availability. The ZTX849 carries RoHS3 compliance certification, ensuring regulatory alignment for new designs and procurement. Both components share identical REACH and ECCN classifications.

Thermal Performance: The ZTX849 supports an extended operating temperature range (-55 to 200°C) compared to the FPN330A (-55 to 150°C), providing additional thermal margin in applications requiring elevated temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the ZTX849 be used as a direct replacement for the FPN330A in existing designs?

A: Yes. The ZTX849 is electrically and mechanically compatible with the FPN330A. The E-Line package is physically compatible with TO-92 form factor PCB layouts. No circuit modifications are required for substitution.

Q: What are the key electrical differences between these parts?

A: The ZTX849 provides higher current handling capability (5A versus 3A), lower saturation voltage (220mV versus 450mV), and lower leakage current (50nA versus 100nA). Both parts share identical voltage ratings (30V) and transition frequency (100MHz).

Q: Are there any thermal considerations when substituting the ZTX849 for the FPN330A?

A: The ZTX849 supports operation to 200°C junction temperature, compared to 150°C for the FPN330A. This extended range provides additional thermal headroom. Power dissipation capability is also higher (1.2W versus 1W).

Q: What is the package compatibility between TO-226-3 and E-Line?

A: The ZTX849 E-Line package is mechanically compatible with TO-92 form factor applications. Both the FPN330A TO-92-3 long body and ZTX849 E-Line packages are through-hole mounted with compatible pin spacing and lead configurations for standard PCB layouts.

Q: Is the ZTX849 available in active production?

A: Yes. The ZTX849 is classified as active product status with current inventory availability. The FPN330A is obsolete, making the ZTX849 the recommended solution for ongoing procurement and new design implementations.

Q: What compliance certifications apply to the ZTX849?

A: The ZTX849 is RoHS3 compliant and REACH unaffected. Both the FPN330A and ZTX849 share identical ECCN (EAR99) and HTSUS (8541.29.0075) classifications.

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