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

onsemi 2N3390_D75Z

Name: 2N3390_D75Z
Brand: onsemi
SKU: 2N3390_D75Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2N3390_D75Z

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Datasheet:: 2N3390_D75Z.pdf

Description:: TRANS NPN 25V 0.5A TO-92-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2N3390_D75Z from Fairchild Semiconductor is an NPN general-purpose amplifier transistor in TO-92 package, rated for V_CEO = 25 V, I_C = 500 mA continuous, and h_FE = 400–800 at I_C = 2.0 mA. It operates across –55°C to +150°C and is used in low-power switching and analog amplification stages of consumer and industrial control circuits.

For engineers reviewing the 2N3390_D75Z datasheet, pinout, applications, or equivalent options, key selection criteria include its TO-92 radial ammo packaging (D75Z), verified h_FE range, thermal resistance (R_θJA = 200°C/W), and suitability for linear amplification with low noise (NF = 5.0 dB for 2N3391A variant, not applicable to 2N3390).

Technical Context

The 2N3390_D75Z is a silicon NPN bipolar junction transistor fabricated using Fairchild's Process 10, optimized for general-purpose linear amplification and switching up to 300 mA collector current. Its DC current gain (h_FE) is specified at V_CE = 4.5 V and I_C = 2.0 mA, with minimum/maximum values of 400/800.

It exhibits low output capacitance (C_ob = 2.0–10 pF at V_CB = 10 V, f = 1 MHz) and small-signal current gain (h_fe) matching its DC h_FE profile. The device is not characterized for noise figure - that parameter applies only to the 2N3391A variant per official documentation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	25 V - maximum safe collector-emitter voltage before breakdown under open-base condition
I_C (continuous)	500 mA - absolute max DC collector current; usable up to 300 mA for reliable general-purpose operation
h_FE	400–800 - DC current gain range at V_CE = 4.5 V, I_C = 2.0 mA; defines base drive requirements
P_D	625 mW - total power dissipation at T_A = 25°C; derates 5.0 mW/°C above ambient
R_θJA	200 °C/W - junction-to-ambient thermal resistance in free-air; determines temperature rise under load
T_J range	–55°C to +150°C - operational junction temperature limits; supports industrial-grade reliability

Pinout & Package

2N3390_D75Z is supplied in TO-92 plastic package with straight leads and no lead clip. The D75Z packing code denotes radial ammo packaging where the first wire off is the collector, adhesive tape is on the bottom side, and the flat side of the transistor faces upward.

Pin/Terminal	Circuit Role	Design Meaning
E (Emitter)	Current sink terminal	Reference node for biasing; connects to ground or low-impedance return path in common-emitter configurations
B (Base)	Control input	Accepts forward-biased current to enable conduction; requires ~0.7 V V_BE turn-on threshold
C (Collector)	Current source terminal	Delivers amplified output current; must be biased positive relative to emitter for active/saturation operation

Key Features

Feature	Design Value
NPN silicon BJT architecture	Enables standard common-emitter amplifier and switch topologies with predictable gain and saturation behavior
TO-92 radial ammo (D75Z)	Supports automated insertion in high-volume manufacturing; flat-side-up orientation ensures consistent mechanical placement
High h_FE range (400–800)	Reduces required base drive current, easing interface with microcontrollers and logic-level drivers
Low C_ob (2.0–10 pF)	Minimizes high-frequency signal loss and phase shift in RF-coupled or wideband amplifier stages

Applications

Audio Pre-amplifier Stage	DC Motor Speed Control
Use Scenario: Low-voltage, low-noise signal amplification in portable audio devices before ADC or headphone driver stage. IC Role / Device Role / Timing Role: NPN amplifier configured in common-emitter topology to provide voltage gain with minimal distortion. Use Value: High h_FE enables stable gain with simple bias network; TO-92 footprint allows compact layout in space-constrained designs.	Use Scenario: PWM-driven switching of small brushed DC motors in robotics and appliance control modules. IC Role / Device Role / Timing Role: General-purpose NPN switch operating in saturation mode to connect motor supply to ground. Use Value: 500 mA I_C rating supports motors drawing ≤300 mA; fast turn-on/off characteristics suit 1–20 kHz PWM frequencies.
LED Driver Circuit	Sensor Signal Conditioning
Use Scenario: Constant-current driving of indicator or status LEDs in industrial HMIs and instrumentation panels. IC Role / Device Role / Timing Role: Linear current regulator using emitter-resistor feedback, leveraging h_FE stability for predictable LED brightness. Use Value: Tight h_FE range minimizes unit-to-unit variation in LED current; TO-92 allows manual replacement during field service.	Use Scenario: Amplifying weak analog outputs from thermistors, photodiodes, or bridge sensors in measurement front-ends. IC Role / Device Role / Timing Role: Low-noise, DC-coupled preamplifier stage with adjustable gain via collector/emitter resistors. Use Value: Low C_ob preserves signal integrity at sensor bandwidths up to ~10 MHz; wide T_J range ensures operation in uncontrolled environments.

Audio Pre-amplifier Stage

DC Motor Speed Control

Use Scenario: Low-voltage, low-noise signal amplification in portable audio devices before ADC or headphone driver stage.

IC Role / Device Role / Timing Role: NPN amplifier configured in common-emitter topology to provide voltage gain with minimal distortion.

Use Value: High h_FE enables stable gain with simple bias network; TO-92 footprint allows compact layout in space-constrained designs.

Use Scenario: PWM-driven switching of small brushed DC motors in robotics and appliance control modules.

IC Role / Device Role / Timing Role: General-purpose NPN switch operating in saturation mode to connect motor supply to ground.

Use Value: 500 mA I_C rating supports motors drawing ≤300 mA; fast turn-on/off characteristics suit 1–20 kHz PWM frequencies.

LED Driver Circuit

Sensor Signal Conditioning

Use Scenario: Constant-current driving of indicator or status LEDs in industrial HMIs and instrumentation panels.

IC Role / Device Role / Timing Role: Linear current regulator using emitter-resistor feedback, leveraging h_FE stability for predictable LED brightness.

Use Value: Tight h_FE range minimizes unit-to-unit variation in LED current; TO-92 allows manual replacement during field service.

Use Scenario: Amplifying weak analog outputs from thermistors, photodiodes, or bridge sensors in measurement front-ends.

IC Role / Device Role / Timing Role: Low-noise, DC-coupled preamplifier stage with adjustable gain via collector/emitter resistors.

Use Value: Low C_ob preserves signal integrity at sensor bandwidths up to ~10 MHz; wide T_J range ensures operation in uncontrolled environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PN2222A	V_CEO = 40 V, h_FE = 100–300 at I_C = 10 mA - higher voltage rating but lower gain than 2N3390_D75Z	Better suited for 24 V rail switching; less ideal for low-base-drive linear amplification	Select when higher breakdown voltage is critical and gain >300 is not required
BC547B	h_FE = 200–450 at I_C = 2 mA, V_CEO = 45 V - wider voltage margin, moderate gain, same TO-92 package	More common in European designs; slightly lower max I_C (100 mA vs. 500 mA)	Prefer for cost-sensitive, non-high-current applications where 45 V headroom suffices

Compared with PN2222A and BC547B, the 2N3390_D75Z offers the highest h_FE among TO-92 NPN transistors in its class, enabling ultra-low base drive in battery-powered amplifiers - but requires careful thermal management due to its 625 mW power limit and 200°C/W R_θJA.

Availability

2N3390_D75Z is available at Aetrix Electronics and suitable for audio pre-amplifier stages, DC motor speed control, and LED driver circuits requiring stable component supply and legacy-compatible TO-92 packaging.

Supply support for 2N3390_D75Z 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 company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The 2N3390_D75Z belongs to Fairchild's legacy NPN general-purpose amplifier family designed for cost-effective, reliable linear amplification and switching in consumer, industrial, and instrumentation applications.

FAQ

What is the pin configuration of the 2N3390_D75Z?

The 2N3390_D75Z uses a standard TO-92 package with E-B-C pin order (Emitter-Base-Collector) when viewed with the flat side facing up and leads pointing downward. This matches the D75Z ammo packaging specification where the flat side is oriented upward and the first wire off is the collector.

Does the 2N3390_D75Z have a specified noise figure?

No - the 5.0 dB noise figure cited in the datasheet applies exclusively to the 2N3391A variant under defined test conditions (V_CE = 4.5 V, I_C = 100 µA, RG = 500 Ω, BW = 15.7 kHz). The 2N3390_D75Z has no published noise figure; its small-signal performance is characterized by h_fe and C_ob instead.

What does the 'D75Z' suffix indicate for the 2N3390_D75Z?

The 'D75Z' suffix identifies the packaging format: radial ammo packaging with collector-first lead orientation, adhesive tape on the bottom side, and flat side of the TO-92 case facing upward. It is not a device variant - electrical specs match the base 2N3390 part.

Can the 2N3390_D75Z replace the 2N2222 in existing designs?

The 2N3390_D75Z shares the same TO-92 package and NPN functionality but differs in key parameters: it offers higher h_FE (400–800 vs. 75–300) and lower V_CEO (25 V vs. 30–40 V). Replacement is feasible if gain improvement is beneficial and voltage margin remains sufficient; verify thermal performance due to identical R_θJA = 200°C/W.

What is the maximum safe operating collector current for continuous use of the 2N3390_D75Z?

The absolute maximum continuous collector current (I_C) for the 2N3390_D75Z is 500 mA per Absolute Maximum Ratings. However, the device is characterized for reliable general-purpose operation up to 300 mA - exceeding this requires derating based on ambient temperature and PCB thermal design to maintain T_J ≤ 150°C.

2N3390_D75Z Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA) Formed Leads

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 500 mA

Voltage - Collector Emitter Breakdown (Max):: 25 V

Vce Saturation (Max) @ Ib, Ic:: -

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 400 @ 2mA, 4.5V

Power - Max:: 625 mW

Frequency - Transition:: -

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

2N3390_D75Z FAQ

1.How can I place an order for 2N3390_D75Z through Aetrix?

Please submit a Request for Quotation (RFQ) for 2N3390_D75Z 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 2N3390_D75Z reliable?

The price and inventory of 2N3390_D75Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2N3390_D75Z is usually 5 days.

3.What payment methods are accepted for 2N3390_D75Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2N3390_D75Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2N3390_D75Z?

2N3390_D75Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2N3390_D75Z 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 2N3390_D75Z?

For technical support, including 2N3390_D75Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2N3390_D75Z requirements.

6.How does Aetrix verify that 2N3390_D75Z is sourced from the original manufacturer or authorized distributors?

All 2N3390_D75Z 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 2N3390_D75Z meets industry standards.

7.What is the process for return or replacement of 2N3390_D75Z?

All 2N3390_D75Z units undergo pre-shipment inspection (PSI). If there is an issue with 2N3390_D75Z, 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 2N3390_D75Z part is unused and in its original packaging.

Return procedure for 2N3390_D75Z:

1.Submit a request within 90 days.

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

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