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

onsemi SS9014DTA

Name: SS9014DTA
Brand: onsemi
SKU: SS9014DTA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SS9014DTA

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: SS9014DTA.pdf

Description:: TRANS NPN 45V 0.1A TO-92-3

Quantity:: RFQ Add To RFQ list

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Inventory:9,320

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Product details

Overview

SS9014DTA from Fairchild Semiconductor is an NPN epitaxial silicon transistor designed for low-noise pre-amplification in audio and signal conditioning circuits, with V_CEO = 45 V, I_C = 100 mA, P_C = 450 mW, h_FE = 60–1000 (class D), and f_T = 150–270 MHz.

For engineers reviewing the SS9014DTA datasheet, pinout, applications, or equivalent options, key selection considerations include DC current gain linearity at low collector currents, low V_BE(sat) and V_CE(sat) under 100 mA drive, noise figure below 10 dB at 1 kHz, and TO-92 mechanical compatibility for through-hole prototyping and compact analog stages.

Technical Context

This NPN bipolar junction transistor operates in active and saturation regions for small-signal amplification and switching. Its high h_FE range (400–1000 for Class D) supports stable biasing in emitter-follower and common-emitter configurations with minimal base drive.

Designed for low-level analog signal paths, it delivers low noise figure (0.9–10 dB at 1 kHz, R_S = 2 kΩ) and tight V_BE(on) (0.58–0.7 V at I_C = 2 mA), enabling predictable turn-on in precision preamp stages without thermal runaway risk.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	45 V - Maximum safe collector-emitter voltage before breakdown; suitable for 24 V rail analog stages.
I_C	100 mA - Continuous collector current rating; supports medium-gain audio driver stages.
h_FE (Class D)	400–1000 - High DC current gain enables low-base-current bias networks and improved input impedance.
f_T	150–270 MHz - Unity-gain bandwidth confirms usability up to VHF band in RF preamp or oscillator buffer roles.
NF	0.9–10 dB @ 1 kHz - Low noise performance critical for microphone preamps and sensor signal conditioning.
V_CE(sat)	0.14–0.3 V @ I_C = 100 mA - Ensures minimal voltage drop and power loss in saturated switch applications.
C_ob	2.2–3.5 pF @ V_CB = 10 V - Low output capacitance preserves high-frequency response in tuned amplifier designs.

Pinout & Package

SS9014DTA is housed in a standard TO-92 plastic package with 3 leads: Emitter (Pin 1), Base (Pin 2), Collector (Pin 3). Lead spacing is 1.27 mm (0.05"), body height ≤3.86 mm, and total length ≤4.58 mm - compatible with manual soldering and wave-solder fixtures.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal in common-emitter configuration	Connected to ground or bias network; sets reference for V_BE and emitter degeneration.
2 (Base)	Control input for minority-carrier injection	Receives low-current drive (e.g., from op-amp output or resistor divider); sensitive to ESD due to thin oxide.
3 (Collector)	Current source terminal in common-emitter configuration	Drives load or next stage; requires heat path management when operating near P_C = 450 mW limit.

Key Features

Feature	Design Value
High h_FE linearity at I_C = 1–10 mA	Enables stable DC biasing and low distortion in Class-A preamplifier stages without feedback trimming.
Low V_BE(on) (0.58–0.7 V)	Reduces base resistor power dissipation and improves thermal stability in multi-transistor bias networks.
Complementary pairing with SS9015	Allows matched NPN/PNP implementation of push-pull output stages or differential pairs in discrete op-amps.
TO-92 mechanical standardization	Ensures plug-and-play replacement across legacy designs and simplifies hand-soldering during repair or prototyping.

Applications

Audio Pre-Amplifier Stage	Low-Noise Sensor Interface
Use Scenario: Amplifying weak signals from electret microphones or piezoelectric transducers before ADC sampling. IC Role / Device Role / Timing Role: NPN small-signal amplifier in common-emitter configuration with emitter degeneration. Use Value: Low NF (0.9–10 dB) and high h_FE preserve SNR while minimizing required gain staging and external components.	Use Scenario: Conditioning millivolt-level outputs from thermocouples or strain gauges in industrial monitoring systems. IC Role / Device Role / Timing Role: Discrete transistor in instrumentation amplifier front-end or current-to-voltage converter. Use Value: Tight V_BE(on) tolerance and low I_CBO (≤50 nA) reduce offset drift and leakage-induced errors at low input currents.
RF Signal Buffer	Discrete Switch Driver
Use Scenario: Isolating local oscillator outputs from mixer inputs in HF receiver front-ends. IC Role / Device Role / Timing Role: Common-collector (emitter-follower) buffer with broadband f_T > 150 MHz. Use Value: f_T up to 270 MHz and C_ob ≤3.5 pF maintain signal integrity and minimize loading on sensitive RF nodes.	Use Scenario: Driving LED arrays or relay coils in embedded control modules where logic-level MOSFETs are unavailable. IC Role / Device Role / Timing Role: Saturated NPN switch with forced β = 20 (I_B = 5 mA @ I_C = 100 mA). Use Value: V_CE(sat) ≤0.3 V ensures <100 mW dissipation at full load, supporting continuous-duty operation within P_C limit.

Audio Pre-Amplifier Stage

Low-Noise Sensor Interface

Use Scenario: Amplifying weak signals from electret microphones or piezoelectric transducers before ADC sampling.

IC Role / Device Role / Timing Role: NPN small-signal amplifier in common-emitter configuration with emitter degeneration.

Use Value: Low NF (0.9–10 dB) and high h_FE preserve SNR while minimizing required gain staging and external components.

Use Scenario: Conditioning millivolt-level outputs from thermocouples or strain gauges in industrial monitoring systems.

IC Role / Device Role / Timing Role: Discrete transistor in instrumentation amplifier front-end or current-to-voltage converter.

Use Value: Tight V_BE(on) tolerance and low I_CBO (≤50 nA) reduce offset drift and leakage-induced errors at low input currents.

RF Signal Buffer

Discrete Switch Driver

Use Scenario: Isolating local oscillator outputs from mixer inputs in HF receiver front-ends.

IC Role / Device Role / Timing Role: Common-collector (emitter-follower) buffer with broadband f_T > 150 MHz.

Use Value: f_T up to 270 MHz and C_ob ≤3.5 pF maintain signal integrity and minimize loading on sensitive RF nodes.

Use Scenario: Driving LED arrays or relay coils in embedded control modules where logic-level MOSFETs are unavailable.

IC Role / Device Role / Timing Role: Saturated NPN switch with forced β = 20 (I_B = 5 mA @ I_C = 100 mA).

Use Value: V_CE(sat) ≤0.3 V ensures <100 mW dissipation at full load, supporting continuous-duty operation within P_C limit.

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN small-signal transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC547C	Lower max h_FE (420 vs. 1000), higher V_CEO (50 V), same TO-92 package	Less suitable for ultra-low-noise preamp stages requiring >600 h_FE at 1 mA	Preferred where higher breakdown margin is prioritized over gain linearity.
MPSA18	Higher V_CEO (50 V), lower f_T (100 MHz), same h_FE range (500–1000)	Reduced high-frequency response limits use in RF buffer roles above 50 MHz	Chosen when enhanced ruggedness against transient overvoltage is required.

Compared with BC547C and MPSA18, SS9014DTA offers superior f_T and lower noise figure for high-fidelity analog signal chains, while maintaining identical TO-92 footprint and pinout - enabling direct substitution where gain-bandwidth and noise performance are design-critical.

Availability

SS9014DTA is available at Aetrix Electronics and suitable for audio pre-amplifier stages, low-noise sensor interfaces, and discrete RF buffer circuits requiring stable component supply and long-term obsolescence resilience.

Supply support for SS9014DTA 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 analog, discrete, and power management ICs before its acquisition by ON Semiconductor in 2016.

The SS9014DTA belongs to Fairchild's legacy small-signal transistor family, engineered specifically for low-noise, high-linearity amplification in consumer audio, instrumentation, and communications equipment.

FAQ

What is the maximum collector current rating for SS9014DTA?

The SS9014DTA has a maximum continuous collector current (I_C) rating of 100 mA at T_A = 25°C. Derating is required above 25°C ambient per the thermal resistance curve in the datasheet; operation at full I_C must ensure junction temperature remains ≤150°C with appropriate PCB copper area or heatsinking.

Is SS9014DTA pin-compatible with other TO-92 NPN transistors like BC547?

Yes, SS9014DTA uses the standard TO-92 package with Emitter-Base-Collector pinout (1-2-3), matching BC547, 2N3904, and MPSA18. However, electrical characteristics differ - SS9014DTA offers higher h_FE and lower noise, so functional equivalence requires verification of gain, saturation voltage, and frequency response in the target circuit.

What h_FE classification does SS9014DTA correspond to?

SS9014DTA is classified as Class D, with guaranteed DC current gain (h_FE) ranging from 400 to 1000 at V_CE = 5 V and I_C = 1 mA. This classification is marked on the device body and confirmed in the Fairchild SS9014 datasheet Rev. A4.

Can SS9014DTA be used in RF applications?

Yes, SS9014DTA supports RF applications up to ~200 MHz due to its f_T of 150–270 MHz and low C_ob (2.2–3.5 pF). It is commonly deployed as a buffer or low-power amplifier in HF receivers and signal generators, provided layout minimizes parasitic inductance and grounding is optimized.

What is the complementary PNP part for SS9014DTA?

The complementary PNP transistor for SS9014DTA is the SS9015, which shares identical TO-92 packaging, voltage ratings (V_CEO = –45 V), power dissipation (450 mW), and h_FE classification structure. This pairing enables balanced differential amplifiers and Class-AB output stages.

SS9014DTA 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):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 45 V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 5mA, 100mA

Current - Collector Cutoff (Max):: 50nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 400 @ 1mA, 5V

Power - Max:: 450 mW

Frequency - Transition:: 270MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

SS9014DTA FAQ

1.How can I place an order for SS9014DTA through Aetrix?

Please submit a Request for Quotation (RFQ) for SS9014DTA 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 SS9014DTA reliable?

The price and inventory of SS9014DTA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS9014DTA is usually 5 days.

3.What payment methods are accepted for SS9014DTA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS9014DTA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS9014DTA?

SS9014DTA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS9014DTA 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 SS9014DTA?

For technical support, including SS9014DTA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS9014DTA requirements.

6.How does Aetrix verify that SS9014DTA is sourced from the original manufacturer or authorized distributors?

All SS9014DTA 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 SS9014DTA meets industry standards.

7.What is the process for return or replacement of SS9014DTA?

All SS9014DTA units undergo pre-shipment inspection (PSI). If there is an issue with SS9014DTA, 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 SS9014DTA part is unused and in its original packaging.

Return procedure for SS9014DTA:

1.Submit a request within 90 days.

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

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