FPN530A Equivalent & Substitute Parts

Part Overview

The FPN530A 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 FPN530A is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value	Unit
Transistor Type	NPN	—
Voltage - Collector Emitter Breakdown (Max)	30	V
Current - Collector (Ic) (Max)	3	A
Power - Max	1	W
Frequency - Transition	150	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 FPN530A is determined by the following critical parameters:

Electrical Compatibility Requirements:

Transistor type must be NPN
Voltage - Collector Emitter Breakdown rating must be equal to or greater than 30V
Current - Collector (Ic) maximum rating must be equal to or greater than 3A
Power dissipation rating must be equal to or greater than 1W
Operating temperature range must encompass or exceed -55°C to 150°C

Mechanical Compatibility Requirements:

Mounting type must be through-hole
Package must be physically compatible with TO-226-3 or TO-92-3 long body footprints

The ZTX849 meets all electrical and mechanical substitution criteria. It exceeds the FPN530A in maximum collector current (5A vs. 3A), power rating (1.2W vs. 1W), and operating temperature range (-55°C to 200°C vs. -55°C to 150°C). The ZTX849 is pin-compatible through its E-Line (TO-92 compatible) package configuration.

Parameter Comparison

Parameter	FPN530A (onsemi)	ZTX849 (Diodes Incorporated)	Unit
Product Status	Obsolete	Active	—
Transistor Type	NPN	NPN	—
Voltage - Collector Emitter Breakdown (Max)	30	30	V
Current - Collector (Ic) (Max)	3	5	A
Vce Saturation (Max)	250mV @ 100mA, 1A	220mV @ 200mA, 5A	mV
Current - Collector Cutoff (Max)	100nA	50nA	nA
DC Current Gain (hFE) (Min)	250 @ 100mA, 2V	100 @ 1A, 1V	—
Power - Max	1	1.2	W
Frequency - Transition	150	100	MHz
Operating Temperature Range	-55 to 150	-55 to 200	°C
Mounting Type	Through Hole	Through Hole	—
Package / Case	TO-226-3, TO-92-3 Long Body	E-Line-3 (TO-92 compatible)	—
REACH Status	REACH Unaffected	REACH Unaffected	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	—

Engineering Selection Recommendations

The ZTX849 is the direct substitute for the obsolete FPN530A. The ZTX849 is manufactured by Diodes Incorporated and maintains active product status, ensuring long-term availability and supply chain continuity.

Compliance and Regulatory Status: Both components share identical REACH and ECCN classifications (REACH Unaffected, EAR99). The ZTX849 carries RoHS3 compliance certification, providing additional regulatory alignment for modern manufacturing environments.

Electrical Performance: The ZTX849 exceeds the FPN530A specifications across all critical parameters. The higher maximum collector current (5A vs. 3A) and power rating (1.2W vs. 1W) provide design margin. The lower collector cutoff current (50nA vs. 100nA) indicates improved leakage characteristics. The operating temperature range extension to 200°C accommodates higher ambient or junction temperature applications.

Mechanical Compatibility: The E-Line (TO-92 compatible) package of the ZTX849 is physically and electrically compatible with TO-92-3 long body footprints. Pin configuration and lead spacing conform to standard through-hole PCB layouts designed for the FPN530A.

Frequently Asked Questions (FAQ)

Q: Can the ZTX849 be used as a direct replacement for the FPN530A in existing designs?

A: Yes. The ZTX849 is electrically and mechanically compatible with the FPN530A. The E-Line package is pin-compatible with TO-92-3 long body footprints. All electrical ratings of the ZTX849 meet or exceed the FPN530A specifications.

Q: What are the key differences between the FPN530A and ZTX849?

A: The ZTX849 provides higher maximum collector current (5A vs. 3A), higher power dissipation rating (1.2W vs. 1W), lower collector cutoff current (50nA vs. 100nA), and an extended operating temperature range (-55°C to 200°C vs. -55°C to 150°C). The FPN530A has a higher transition frequency (150MHz vs. 100MHz). The ZTX849 is an active product, while the FPN530A is obsolete.

Q: Are there any package considerations when substituting the ZTX849 for the FPN530A?

A: The ZTX849 uses an E-Line package configuration that is TO-92 compatible. This package is physically compatible with PCB layouts designed for TO-226-3 and TO-92-3 long body components. No PCB modifications are required for substitution.

Q: What is the impact of the lower transition frequency of the ZTX849 compared to the FPN530A?

A: The ZTX849 transition frequency is 100MHz versus the FPN530A at 150MHz. This difference is relevant only in high-frequency switching applications operating above 100MHz. For standard switching and amplification applications below 100MHz, this parameter difference has no practical impact.

Q: Does the ZTX849 meet the same regulatory requirements as the FPN530A?

A: Both components share REACH Unaffected and EAR99 ECCN classifications. The ZTX849 additionally carries RoHS3 compliance certification. Both components have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: What is the DC current gain difference between these components?

A: The FPN530A specifies a minimum DC current gain (hFE) of 250 at 100mA and 2V. The ZTX849 specifies a minimum hFE of 100 at 1A and 1V. These measurements are taken at different operating points, making direct comparison inappropriate. Circuit designs should not depend on specific hFE values; instead, use feedback networks or current-limiting resistors to ensure stable operation independent of transistor gain variation.

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