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

onsemi SS9011FBU

Name: SS9011FBU
Brand: onsemi
SKU: SS9011FBU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SS9011FBU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: SS9011FBU.pdf

Description:: TRANS NPN 30V 0.03A TO-92-3

Quantity:: RFQ Add To RFQ list

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Inventory:5,174

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Product details

Overview

SS9011FBU from Fairchild Semiconductor is an NPN epitaxial silicon transistor in TO-92 package, rated for 30 V V_CEO, 30 mA I_C, and 400 mW P_C, with h_FE range 132–198 (Class I), used in AM/FM IF amplifier stages and general-purpose small-signal amplification.

For engineers reviewing the SS9011FBU datasheet, pinout, applications, or equivalent options, key selection factors include its Class I h_FE binning, low V_CE(sat) (0.08–0.3 V at I_C=10 mA/I_B=1 mA), f_T of 2.0 MHz, noise figure of 4.0 dB, and TO-92 mechanical compatibility.

Technical Context

This discrete NPN transistor operates as a linear small-signal amplifier or switch in low-power analog circuits. Its DC current gain is binned per h_FE classification - SS9011FBU corresponds to Class I (132–198) - and exhibits low saturation voltage and moderate bandwidth suitable for IF amplification.

The device features tight parameter control: BVCBO = 50 V, BVCEO = 30 V, and Cob = 150–370 pF at 10 V V_CB and 1 MHz, supporting stable operation in tuned RF/IF stages where capacitance matching and gain consistency are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	30 V - maximum safe collector-emitter voltage before breakdown in common-emitter configuration
I_C	30 mA - continuous collector current rating defining linear operating headroom
P_C	400 mW - thermal power limit at T_A = 25°C, constraining dissipation in TO-92 package
h_FE (Class I)	132–198 - guaranteed DC current gain range enabling predictable biasing in amplifier designs
f_T	2.0 MHz - unity-gain bandwidth limiting usable frequency range in small-signal amplifiers
V_CE(sat)	0.08–0.3 V @ I_C=10 mA/I_B=1 mA - low saturation voltage enabling efficient switching in digital logic interfaces
NF	4.0 dB @ 1 MHz, R_S=500 Ω - quantified noise contribution critical for AM/FM IF stage signal integrity

Pinout & Package

SS9011FBU is housed in a standard TO-92 plastic package with lead spacing and outline conforming to JEDEC TO-92 specifications. Dimensions: 4.58 mm length × 3.60 mm width × 1.27 mm thickness (typical), with 2.54 mm lead pitch.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal	Reference node for bias network; connects to ground or emitter resistor in common-emitter amplifier
2 (Base)	Control input terminal	Receives drive current to modulate collector current; requires series resistor for current limiting
3 (Collector)	Current source terminal	Delivers amplified output current; connects to load resistor or next stage input in cascaded IF amplifiers

Key Features

Feature	Design Value
Class I h_FE binning	Guaranteed 132–198 h_FE enables consistent gain matching across production units in multi-stage IF amps
Low V_CE(sat)	0.08–0.3 V ensures minimal voltage drop and power loss when used as a saturated switch in logic interface circuits
Controlled Cob	150–370 pF output capacitance supports stable tuning in 455 kHz or 10.7 MHz IF tank circuits without excessive detuning
Specified noise figure	4.0 dB at 1 MHz allows use in low-noise pre-amplifier positions within AM/FM receiver front-ends
JEDEC TO-92 compliance	Standardized mechanical footprint ensures compatibility with automated insertion equipment and legacy PCB layouts

Applications

AM/FM IF Amplifier	General-Purpose Small-Signal Amplifier
Use Scenario: Intermediate-frequency amplification in portable AM/FM radios operating at 455 kHz or 10.7 MHz. IC Role / Device Role / Timing Role: NPN small-signal transistor configured in common-emitter topology to provide voltage gain and impedance transformation. Use Value: Class I h_FE binning and 4.0 dB noise figure maintain SNR and gain stability across production units in cost-sensitive consumer receivers.	Use Scenario: Low-voltage, low-current signal buffering and amplification in sensor interface and audio preamp circuits. IC Role / Device Role / Timing Role: Linear amplifier stage providing modest voltage gain with minimal distortion at frequencies up to 2 MHz. Use Value: Tight V_CE(sat) and controlled Cob enable predictable AC coupling and stable biasing without external trimming components.
Digital Logic Interface	Low-Power Switching Load Driver
Use Scenario: Level translation and current boosting between microcontroller GPIO pins and higher-current loads like LEDs or relays. IC Role / Device Role / Timing Role: Saturated NPN switch turning on/off based on TTL- or CMOS-compatible base drive. Use Value: Guaranteed h_FE ≥132 ensures reliable saturation with ≤1 mA base current, reducing MCU drive burden.	Use Scenario: Driving small solenoids, buzzers, or indicator lamps in battery-powered instrumentation. IC Role / Device Role / Timing Role: Low-duty-cycle switching element controlling load current up to 30 mA from a microcontroller output. Use Value: 400 mW power rating and TO-92 thermal profile allow intermittent operation without heatsinking in space-constrained enclosures.

AM/FM IF Amplifier

General-Purpose Small-Signal Amplifier

Use Scenario: Intermediate-frequency amplification in portable AM/FM radios operating at 455 kHz or 10.7 MHz.

IC Role / Device Role / Timing Role: NPN small-signal transistor configured in common-emitter topology to provide voltage gain and impedance transformation.

Use Value: Class I h_FE binning and 4.0 dB noise figure maintain SNR and gain stability across production units in cost-sensitive consumer receivers.

Use Scenario: Low-voltage, low-current signal buffering and amplification in sensor interface and audio preamp circuits.

IC Role / Device Role / Timing Role: Linear amplifier stage providing modest voltage gain with minimal distortion at frequencies up to 2 MHz.

Use Value: Tight V_CE(sat) and controlled Cob enable predictable AC coupling and stable biasing without external trimming components.

Digital Logic Interface

Low-Power Switching Load Driver

Use Scenario: Level translation and current boosting between microcontroller GPIO pins and higher-current loads like LEDs or relays.

IC Role / Device Role / Timing Role: Saturated NPN switch turning on/off based on TTL- or CMOS-compatible base drive.

Use Value: Guaranteed h_FE ≥132 ensures reliable saturation with ≤1 mA base current, reducing MCU drive burden.

Use Scenario: Driving small solenoids, buzzers, or indicator lamps in battery-powered instrumentation.

IC Role / Device Role / Timing Role: Low-duty-cycle switching element controlling load current up to 30 mA from a microcontroller output.

Use Value: 400 mW power rating and TO-92 thermal profile allow intermittent operation without heatsinking in space-constrained enclosures.

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	h_FE 420–800 (higher gain), V_CEO = 45 V, same TO-92 package	Higher gain may require bias network redesign; better suited for high-gain preamps than IF stages needing controlled gain	Select BC547C only if higher h_FE and improved V_CEO margin are required and circuit stability under gain variation is verified.
2N3904	h_FE 100–300 (broader spread), V_CEO = 40 V, identical pinout and TO-92 footprint	Wider h_FE tolerance increases unit-to-unit gain variance; acceptable where calibration or feedback compensates	2N3904 offers broader industry availability but lacks SS9011FBU's tight Class I binning for matched IF gain stages.

Compared with BC547C and 2N3904, SS9011FBU provides narrower h_FE distribution (132–198) and lower noise figure (4.0 dB), making it preferable for production-critical AM/FM IF amplifiers where gain consistency and signal fidelity are prioritized over maximum gain.

Availability

SS9011FBU is available at Aetrix Electronics and suitable for AM/FM IF amplifiers, general-purpose small-signal amplification, and low-power switching applications requiring stable component supply and long-term manufacturability.

Supply support for SS9011FBU 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 devices before its acquisition by ON Semiconductor in 2016.

The SS9011FBU belongs to Fairchild's legacy general-purpose bipolar transistor family, designed specifically for cost-sensitive consumer audio, radio, and interface applications demanding reliability and consistent parametric performance.

FAQ

What is the h_FE range for SS9011FBU?

The SS9011FBU is binned to Class I, with a guaranteed DC current gain (h_FE) range of 132 to 198 when measured at V_CE = 5 V and I_C = 1 mA. This tight binning supports repeatable biasing in production IF amplifier designs without post-manufacture gain trimming.

Is SS9011FBU pin-compatible with other TO-92 NPN transistors?

Yes, SS9011FBU uses the standard TO-92 package with E-B-C pinout (pin 1 = emitter, pin 2 = base, pin 3 = collector), matching common NPN transistors like 2N3904 and BC547. Mechanical fit is assured, though electrical parameters such as h_FE and V_CE(sat) differ and must be validated per application.

What is the maximum operating temperature for SS9011FBU?

The SS9011FBU has a junction temperature limit of 150°C and a storage temperature range of –55°C to +150°C. At ambient temperatures up to 70°C, the device can safely dissipate its full 400 mW rating only with adequate PCB copper area; derating is required above 25°C ambient per the thermal resistance curve in the datasheet.

Can SS9011FBU be used in RF applications beyond IF stages?

SS9011FBU has an f_T of 2.0 MHz, limiting its effective use to low-frequency RF applications such as AM/FM IF amplification (455 kHz / 10.7 MHz). It is not suitable for HF, VHF, or broadband RF amplification due to insufficient gain-bandwidth product and uncharacterized S-parameters above 2 MHz.

Does SS9011FBU have qualified automotive-grade variants?

No - SS9011FBU is a commercial-grade device rated for –55°C to +150°C storage but not AEC-Q101 qualified. Fairchild did not release automotive-grade versions of the SS9011 series; for automotive applications, designers should consider AEC-Q101-compliant alternatives such as the MMBT3904 or NSS40301MR6T1.

SS9011FBU Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 30 mA

Voltage - Collector Emitter Breakdown (Max):: 30 V

Vce Saturation (Max) @ Ib, Ic:: 300mV @ 1mA, 10mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 54 @ 1mA, 5V

Power - Max:: 400 mW

Frequency - Transition:: 2MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

SS9011FBU FAQ

1.How can I place an order for SS9011FBU through Aetrix?

Please submit a Request for Quotation (RFQ) for SS9011FBU 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 SS9011FBU reliable?

The price and inventory of SS9011FBU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS9011FBU is usually 5 days.

3.What payment methods are accepted for SS9011FBU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS9011FBU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS9011FBU?

SS9011FBU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS9011FBU 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 SS9011FBU?

For technical support, including SS9011FBU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS9011FBU requirements.

6.How does Aetrix verify that SS9011FBU is sourced from the original manufacturer or authorized distributors?

All SS9011FBU 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 SS9011FBU meets industry standards.

7.What is the process for return or replacement of SS9011FBU?

All SS9011FBU units undergo pre-shipment inspection (PSI). If there is an issue with SS9011FBU, 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 SS9011FBU part is unused and in its original packaging.

Return procedure for SS9011FBU:

1.Submit a request within 90 days.

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

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