FPN530 Equivalent & Substitute Parts

Part Overview

The FPN530 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 FPN530 is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing design support and procurement continuity.

Substiute Parts

FPN530

onsemiIn Stock: 815FPN530 Datasheet

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ZTX849

Diodes IncorporatedIn Stock: 15897ZTX849 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FPN530 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 substitution criteria. It is an active-status NPN transistor with identical voltage rating (30V), higher current rating (5A), higher power rating (1.2W), and extended operating temperature range (-55°C to 200°C). The E-Line package is mechanically compatible with TO-92 footprints.

Parameter Comparison

Engineering Selection Recommendations

The ZTX849 is a direct functional substitute for the FPN530. Selection of the ZTX849 is supported by the following factors:

Product Status: The FPN530 is obsolete, while the ZTX849 is active and in production. This ensures long-term availability and supply chain continuity.

Regulatory Compliance: Both components are REACH Unaffected and carry identical ECCN and HTSUS classifications (EAR99 and 8541.29.0075 respectively). The ZTX849 carries RoHS3 compliance certification, providing additional environmental regulatory alignment.

Electrical Performance: The ZTX849 meets or exceeds all critical electrical parameters. The 30V voltage rating is identical, and the 5A current rating provides margin above the FPN530's 3A specification. Power dissipation is increased to 1.2W. The transition frequency of the FPN530 (150MHz) exceeds that of the ZTX849 (100MHz); applications requiring frequencies above 100MHz must be evaluated for compatibility.

Thermal Performance: The ZTX849 operating temperature range extends to 200°C, exceeding the FPN530's 150°C maximum, providing additional thermal margin in high-temperature applications.

Mechanical Compatibility: The E-Line package of the ZTX849 is physically compatible with TO-92 footprints, ensuring direct board-level substitution without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the ZTX849 directly replace the FPN530 in existing designs?

A: The ZTX849 is electrically and mechanically compatible with the FPN530 for applications operating at or below 100MHz. The ZTX849 provides equal or superior performance across all critical parameters including voltage rating, current capacity, power dissipation, and operating temperature range. Direct substitution is supported without circuit modification.

Q: What is the primary limitation when substituting the ZTX849 for the FPN530?

A: The transition frequency differs between the two components. The FPN530 operates at 150MHz, while the ZTX849 operates at 100MHz. Applications requiring switching or amplification above 100MHz must be evaluated to confirm the ZTX849 meets frequency requirements.

Q: Are the packages physically interchangeable?

A: Yes. The ZTX849 E-Line package is mechanically compatible with TO-92 footprints. The FPN530 is available in TO-226-3 and TO-92-3 long body packages. The ZTX849 can be directly mounted on existing PCB layouts designed for TO-92 footprints without modification.

Q: Does the ZTX849 meet the same regulatory requirements as the FPN530?

A: Both components are REACH Unaffected and carry identical ECCN (EAR99) and HTSUS (8541.29.0075) classifications. The ZTX849 additionally carries RoHS3 compliance certification. Both components have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions.

Q: What are the key electrical advantages of the ZTX849 over the FPN530?

A: The ZTX849 provides higher maximum collector current (5A versus 3A), higher power dissipation capability (1.2W versus 1W), lower collector cutoff current (50nA versus 100nA), and lower saturation voltage (220mV versus 300mV). These characteristics result in improved efficiency and reduced leakage in switching applications.

Q: Is the ZTX849 available in the same packaging options as the FPN530?

A: The ZTX849 is supplied in E-Line (TO-92 compatible) packaging. The FPN530 was available in TO-226-3 and TO-92-3 long body packages. The ZTX849 E-Line package is compatible with TO-92 footprints. Applications requiring TO-226 package compatibility must evaluate alternative substitutes.

Q: What is the inventory status of these components?

A: The FPN530 has 801 pieces in stock as new original inventory. The ZTX849 has 15,819 pieces in stock as new original inventory. The ZTX849's significantly higher inventory level supports sustained procurement for ongoing production requirements.