Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi FPN660

Name: FPN660
Brand: onsemi
SKU: FPN660
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: FPN660

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 Long Body

Datasheet:: FPN660.pdf

Description:: TRANS PNP 60V 3A TO-226

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:9,306

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

FPN660 from Fairchild Semiconductor is a PNP bipolar junction transistor designed for high-current switching and linear amplification in power control circuits, featuring 60 V V_CEO, 3 A continuous I_C, 70–250 h_FE at I_C = 100 mA to 1.0 A, and 300 mV V_CE(sat) at I_C = 1.0 A / I_B = 100 mA - used in DC-DC converter output stages and motor driver H-bridge low-side switches.

For engineers reviewing the FPN660 datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, TO-226 package thermal resistance (R_θJA = 125°C/W), low saturation voltage under 1 A load, breakdown voltage margin above 55 V BV_CEO, and junction temperature range from –55°C to +150°C.

Technical Context

This device operates as a medium-power PNP BJT with negative-polarity voltage/current conventions per datasheet note. Its design emphasizes low V_CE(sat) and high h_FE at collector currents up to 3 A, enabled by Fairchild's PA process and optimized emitter-base geometry.

Thermal performance is defined by R_θJC = 50°C/W and R_θJA = 125°C/W, supporting operation up to 150°C junction temperature. Small-signal behavior includes f_T = 75 MHz at I_C = 100 mA and C_obo = 45 pF at V_CB = 10 V, confirming suitability for moderate-frequency switching applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - maximum safe collector-emitter voltage before avalanche breakdown under open-base conditions.
I_C (continuous)	3 A - continuous collector current rating defining steady-state power handling capability.
h_FE	70–250 - DC current gain range across I_C = 100 mA to 1.0 A, enabling predictable base drive sizing.
V_CE(sat)	300 mV @ I_C = 1.0 A / I_B = 100 mA - low saturation voltage minimizes conduction loss in switching applications.
f_T	75 MHz - transition frequency indicating usable bandwidth for small-signal amplification or fast switching.
T_J range	–55°C to +150°C - operational junction temperature window suitable for industrial and automotive under-hood environments.

Pinout & Package

FPN660 is housed in a TO-226 (TO-92 variant) plastic package with standard leadform: Emitter (pin 1), Base (pin 2), Collector (pin 3), as confirmed by package outline diagram and pin labeling in Rev. A2 datasheet.

Pin/Terminal	Circuit Role	Design Meaning
1 (E)	Emitter	Current source terminal for PNP operation; connects to higher potential rail in common-emitter configurations.
2 (B)	Base	Control terminal requiring negative bias relative to emitter to turn on; drives ~100 mA for 1 A collector conduction.
3 (C)	Collector	Current sink terminal; connects to load or lower-potential node; rated for 60 V reverse bias and 3 A continuous current.

Key Features

Feature	Design Value
Low saturation voltage	V_CE(sat) = 300 mV at I_C = 1.0 A enables <1 W conduction loss in 12 V systems.
High DC current gain	h_FE ≥ 70 at I_C = 100 mA reduces required base drive current and simplifies driver design.
Robust breakdown ratings	BV_CEO = 55 V and BV_CBO = 80 V provide margin against voltage transients in inductive loads.
Wide temperature operation	–55°C to +150°C junction range supports deployment in uncontrolled ambient environments without derating.

Applications

Motor Control	Power Supply Regulation
Use Scenario: Driving 24 V brushed DC motors in industrial actuators with PWM frequencies ≤ 20 kHz. IC Role / Device Role / Timing Role: PNP switch in low-side configuration, sinking motor current during active phase. Use Value: 300 mV V_CE(sat) limits power dissipation to <0.3 W at 1 A, reducing heatsink requirements.	Use Scenario: Linear pass element in adjustable 5–15 V, 1–2 A bench power supplies. IC Role / Device Role / Timing Role: Series pass transistor regulating output voltage via base-controlled emitter-follower configuration. Use Value: High h_FE (≥100 at 500 mA) ensures stable regulation with minimal error amplifier output current.
LED Driver	Overcurrent Protection
Use Scenario: Constant-current sink for high-brightness LED strings in signage applications. IC Role / Device Role / Timing Role: Current-regulated PNP switch controlling LED cathode path with sense-resistor feedback. Use Value: Tight V_BE(on) = 1.0 V at I_C = 1.0 A enables accurate current setting with low-voltage sense resistors.	Use Scenario: Foldback current limiter in 12 V automotive accessory circuits. IC Role / Device Role / Timing Role: Sensing overcurrent via emitter resistor and shutting down load via saturated PNP cutoff. Use Value: Fast f_T = 75 MHz allows response within µs-scale fault events without oscillation.

Motor Control

Power Supply Regulation

Use Scenario: Driving 24 V brushed DC motors in industrial actuators with PWM frequencies ≤ 20 kHz.

IC Role / Device Role / Timing Role: PNP switch in low-side configuration, sinking motor current during active phase.

Use Value: 300 mV V_CE(sat) limits power dissipation to <0.3 W at 1 A, reducing heatsink requirements.

Use Scenario: Linear pass element in adjustable 5–15 V, 1–2 A bench power supplies.

IC Role / Device Role / Timing Role: Series pass transistor regulating output voltage via base-controlled emitter-follower configuration.

Use Value: High h_FE (≥100 at 500 mA) ensures stable regulation with minimal error amplifier output current.

LED Driver

Overcurrent Protection

Use Scenario: Constant-current sink for high-brightness LED strings in signage applications.

IC Role / Device Role / Timing Role: Current-regulated PNP switch controlling LED cathode path with sense-resistor feedback.

Use Value: Tight V_BE(on) = 1.0 V at I_C = 1.0 A enables accurate current setting with low-voltage sense resistors.

Use Scenario: Foldback current limiter in 12 V automotive accessory circuits.

IC Role / Device Role / Timing Role: Sensing overcurrent via emitter resistor and shutting down load via saturated PNP cutoff.

Use Value: Fast f_T = 75 MHz allows response within µs-scale fault events without oscillation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD2955	TO-220 package, 60 V V_CEO, 10 A I_C, higher R_θJA (62.5°C/W), no f_T spec	Higher power handling but larger footprint; unsuitable for space-constrained TO-92 layouts	Select when >3 A peak current or enhanced thermal mass is required; verify PCB pad compatibility.
BC639	TO-92, 60 V V_CEO, 1 A I_C, h_FE = 40–160, V_CE(sat) = 500 mV @ 500 mA	Lower current and higher saturation voltage limit use to sub-ampere loads	Choose for cost-sensitive, low-power analog amplification where 300 mV V_CE(sat) is not critical.

Compared with MJD2955 and BC639, the FPN660 uniquely balances TO-226 form factor, 3 A capability, and 300 mV saturation voltage - making it optimal for compact, medium-current PNP switching where thermal and voltage-drop constraints intersect.

Availability

FPN660 is available at Aetrix Electronics and suitable for motor control, power supply regulation, LED driver, and overcurrent protection applications requiring stable component supply and long-term industrial availability.

Supply support for FPN660 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Fairchild Semiconductor was a U.S.-based semiconductor manufacturer specializing in power management, analog, and discrete devices before its acquisition by ON Semiconductor in 2016.

The FPN660 belongs to Fairchild's PNP low-saturation transistor family, engineered for high-efficiency switching in industrial power conversion and control systems where thermal and voltage-drop constraints are critical.

FAQ

What is the maximum continuous collector current rating for the FPN660?

The FPN660 has a maximum continuous collector current (I_C) rating of 3 A at T_A = 25°C, as specified in the Absolute Maximum Ratings table. This rating assumes proper heatsinking and adherence to the thermal resistance limits (R_θJA = 125°C/W). At elevated ambient temperatures or without forced cooling, derating is required per the Power Dissipation vs. Ambient Temperature curve in the datasheet.

Is the FPN660 pin-compatible with the FPN660A variant?

Yes, the FPN660 and FPN660A share identical TO-226 package and pinout (Emitter–Base–Collector on pins 1–2–3), but differ electrically: FPN660A has lower VCBO (60 V vs. 80 V) and higher h_FE minimum (80 vs. 70) at I_C = 500 mA. Substitution requires verification of VCBO margin in the target circuit.

What is the typical base-emitter on voltage (V_BE(on)) for the FPN660?

The typical V_BE(on) for the FPN660 is 1.0 V at I_C = 1.0 A and V_CE = 2.0 V, as stated in the Electrical Characteristics table. This value is critical for calculating base resistor values in fixed-bias configurations and remains stable across –40°C to +125°C per the Typical Characteristics curves.

Does the FPN660 support operation at elevated junction temperatures?

Yes, the FPN660 is rated for junction temperatures from –55°C to +150°C. Its thermal characteristics (R_θJC = 50°C/W, R_θJA = 125°C/W) allow operation at full 3 A current only with adequate heatsinking below 100°C ambient; above that, current must be reduced per the derating curve in Figure 6 of the datasheet.

Can the FPN660 be used in high-frequency switching applications?

The FPN660 has an f_T of 75 MHz at I_C = 100 mA and V_CE = 5.0 V, indicating usable gain up to several MHz. However, its TO-226 package parasitics and saturation recovery time limit practical switching frequencies to ≤ 500 kHz in hard-switched topologies; for >1 MHz, dedicated RF or RF-optimized transistors are recommended.

FPN660 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 Long Body

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 3 A

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 450mV @ 200mA, 2A

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 500mA, 2V

Power - Max:: 1 W

Frequency - Transition:: 75MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-226

FPN660 FAQ

1.How can I place an order for FPN660 through Aetrix?

Please submit a Request for Quotation (RFQ) for FPN660 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for FPN660 reliable?

The price and inventory of FPN660 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FPN660 is usually 5 days.

3.What payment methods are accepted for FPN660?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FPN660 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FPN660?

FPN660 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FPN660 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for FPN660?

For technical support, including FPN660 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FPN660 requirements.

6.How does Aetrix verify that FPN660 is sourced from the original manufacturer or authorized distributors?

All FPN660 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that FPN660 meets industry standards.

7.What is the process for return or replacement of FPN660?

All FPN660 units undergo pre-shipment inspection (PSI). If there is an issue with FPN660, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The FPN660 part is unused and in its original packaging.

Return procedure for FPN660:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…