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

onsemi SS9015BBU

Name: SS9015BBU
Brand: onsemi
SKU: SS9015BBU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SS9015BBU

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: SS9015BBU.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SS9015BBU from Fairchild Semiconductor is a PNP epitaxial silicon transistor designed for low-frequency, low-noise amplification in analog signal paths. It features V_CEO = −45 V, I_C = −100 mA, h_FE = 100–300 (Class B), f_T = 100–190 MHz, and V_BE(sat) = −1.0 V at I_C = −100 mA/I_B = −5 mA. It serves as a complement to SS9014 in dual-transistor amplifier stages.

For engineers reviewing the SS9015BBU datasheet, pinout, applications, or equivalent options, key selection criteria include its Class B h_FE range, TO-92 package compatibility, low-noise performance (NF = 0.7–10 dB at 1 kHz), saturation voltage behavior, and complementary pairing with NPN SS9014 in bias-stable amplifier designs.

Technical Context

The SS9015BBU operates as a general-purpose PNP bipolar junction transistor optimized for linear amplification-not switching-due to its specified noise figure, f_T, and h_FE linearity across I_C = −0.2 mA to −10 mA. Its V_CE(sat) of −0.7 V and V_BE(sat) of −1.0 V are characterized under forced β = 20 conditions, confirming suitability for Class A small-signal stages.

It shares the same TO-92 mechanical outline and terminal assignment (Emitter–Base–Collector = Pin 1–2–3) as SS9014, enabling matched-pair implementation in differential or push-pull topologies. Absolute maximum ratings-including T_J = 150°C and P_C = 450 mW-support continuous operation in ambient temperatures up to 85°C with minimal derating.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−45 V: Maximum reverse-biased collector-emitter voltage before breakdown; sets safe operating voltage headroom in common-emitter amplifier rails.
h_FE (Class B)	100–300: DC current gain range at V_CE = −5 V, I_C = −1 mA; enables predictable bias point setting in fixed-bias or emitter-degenerated stages.
f_T	100–190 MHz: Unity-gain bandwidth at V_CE = −5 V, I_C = −10 mA; supports audio and low-RF amplification up to ~10 MHz with usable gain margin.
NF	0.7–10 dB at 1 kHz, R_S = 1 kΩ: Confirmed low-noise performance for preamplifier input stages where source impedance is ≤1 kΩ.
C_ob	4.5–7.0 pF at V_CB = −10 V: Output capacitance limiting high-frequency stability; requires careful layout in >10 MHz applications to avoid unintended peaking.
P_C	450 mW: Maximum dissipation at T_A = 25°C; defines thermal design envelope-requires heatsinking or derating above 50°C ambient.

Pinout & Package

SS9015BBU is housed in a standard TO-92 plastic package with 3 leads. Lead identification follows JEDEC TO-92 outline: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector. Package dimensions conform to Fairchild's published drawing: body height 4.58 mm max, lead pitch 1.27 mm, overall length 4.58 mm.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current sink terminal in PNP configuration	Connected to most positive rail in common-emitter stage; sets reference for base bias network and emitter resistor selection.
2 (Base)	Control electrode for minority-carrier injection	Receives forward-biased current to modulate collector current; requires stable voltage divider or current source for low-drift operation.
3 (Collector)	Output current terminal	Drives load or next stage; polarity inversion relative to base signal confirms PNP operation in active region.

Key Features

Feature	Design Value
Low-noise amplification	NF = 0.7–10 dB at 1 kHz enables use in microphone preamps and sensor front-ends without added noise floor degradation.
Matched h_FE classification (Class B)	Guaranteed 100–300 h_FE ensures consistent DC biasing when paired with SS9014 in complementary circuits.
High f_T for low-frequency transistors	100–190 MHz f_T provides >10× margin over audio band, supporting wideband instrumentation amplifier designs.
TO-92 mechanical compatibility	Standard footprint allows drop-in replacement in legacy through-hole PCBs designed for SS9013/SS9014/SS9015 family.

Applications

Audio Pre-amplifier Stage	DC-Coupled Sensor Interface
Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors before ADC sampling. IC Role / Device Role / Timing Role: PNP small-signal amplifier in common-emitter configuration with emitter degeneration. Use Value: Low NF (0.7–10 dB) preserves SNR; Class B h_FE ensures stable gain across production lots without trimming.	Use Scenario: Conditioning low-level output from thermocouples or strain gauges in industrial data loggers. IC Role / Device Role / Timing Role: First-stage transimpedance or voltage amplifier with DC-coupled feedback. Use Value: V_CEO = −45 V supports ±15 V supply rails; low I_CBO (−50 nA) minimizes offset drift over temperature.
Complementary Pair Amplifier	Low-Power Linear Regulator Pass Element
Use Scenario: Building Class AB output stages with matched SS9014 (NPN) and SS9015BBU (PNP) in discrete op-amp outputs. IC Role / Device Role / Timing Role: PNP half of complementary emitter-follower pair driving capacitive loads. Use Value: Identical TO-92 footprint and thermal profile enable symmetrical layout; matched h_FE reduces crossover distortion.	Use Scenario: Implementing adjustable linear regulators requiring low-quiescent-current pass devices. IC Role / Device Role / Timing Role: PNP series pass transistor controlled by error amplifier feedback. Use Value: V_CE(sat) = −0.7 V limits dropout voltage; P_C = 450 mW supports up to 100 mA load at <1 V dropout.

Audio Pre-amplifier Stage

DC-Coupled Sensor Interface

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

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

Use Value: Low NF (0.7–10 dB) preserves SNR; Class B h_FE ensures stable gain across production lots without trimming.

Use Scenario: Conditioning low-level output from thermocouples or strain gauges in industrial data loggers.

IC Role / Device Role / Timing Role: First-stage transimpedance or voltage amplifier with DC-coupled feedback.

Use Value: V_CEO = −45 V supports ±15 V supply rails; low I_CBO (−50 nA) minimizes offset drift over temperature.

Complementary Pair Amplifier

Low-Power Linear Regulator Pass Element

Use Scenario: Building Class AB output stages with matched SS9014 (NPN) and SS9015BBU (PNP) in discrete op-amp outputs.

IC Role / Device Role / Timing Role: PNP half of complementary emitter-follower pair driving capacitive loads.

Use Value: Identical TO-92 footprint and thermal profile enable symmetrical layout; matched h_FE reduces crossover distortion.

Use Scenario: Implementing adjustable linear regulators requiring low-quiescent-current pass devices.

IC Role / Device Role / Timing Role: PNP series pass transistor controlled by error amplifier feedback.

Use Value: V_CE(sat) = −0.7 V limits dropout voltage; P_C = 450 mW supports up to 100 mA load at <1 V dropout.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP small-signal amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC557B	h_FE = 200–450 (Class B), V_CEO = −45 V, f_T ≈ 100 MHz, TO-92 package	Higher typical h_FE but wider spread; slightly higher Cob (8 pF)	Preferred where tighter h_FE matching is less critical than availability; verify noise figure if used in mic preamps.
MPSA92	V_CEO = −300 V, I_C = −500 mA, P_C = 625 mW, TO-92, h_FE = 25–200	Higher voltage/current rating but lower f_T (~50 MHz) and no guaranteed low-noise spec	Selected only when high-voltage tolerance is required; not recommended for low-noise audio due to unspecified NF.

Compared with BC557B and MPSA92, SS9015BBU offers the narrowest h_FE range (100–300) and documented low-noise performance-making it optimal for precision analog front-ends where gain predictability and SNR preservation are prioritized over raw power handling.

Availability

SS9015BBU is available at Aetrix Electronics and suitable for audio pre-amplifiers, sensor interface circuits, complementary amplifier stages, and low-power linear regulator designs requiring stable component supply and long-term obsolescence management.

Supply support for SS9015BBU 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 SS9015BBU belongs to Fairchild's legacy general-purpose transistor product line, engineered specifically for low-noise, low-frequency linear amplification in consumer and industrial analog systems.

FAQ

What is the h_FE range for SS9015BBU?

The SS9015BBU is classified as Class B, with a guaranteed DC current gain (h_FE) range of 100 to 300 when measured at V_CE = −5 V and I_C = −1 mA. This tight spread supports repeatable biasing in production amplifier circuits and complements the SS9014 NPN transistor for matched-pair designs. The SS9015BBU datasheet confirms this classification explicitly in its h_FE table.

Is SS9015BBU pin-compatible with SS9014?

Yes, SS9015BBU is mechanically and electrically pin-compatible with SS9014: both use TO-92 packages with identical pinout (Emitter–Base–Collector = Pin 1–2–3). This enables direct placement in complementary amplifier layouts. However, SS9015BBU is PNP while SS9014 is NPN, so polarity-sensitive connections must be verified. The SS9015BBU datasheet confirms shared package dimensions and terminal assignment.

What is the maximum collector power dissipation for SS9015BBU?

The SS9015BBU has a maximum collector power dissipation (P_C) of 450 mW at T_A = 25°C. Derating is required above 25°C ambient-typically 4.5 mW/°C-reducing allowable dissipation to ~225 mW at 75°C. This value is specified in the Absolute Maximum Ratings table of the SS9015BBU datasheet and governs thermal design for continuous operation.

Does SS9015BBU have a specified noise figure?

Yes, SS9015BBU specifies a noise figure (NF) of 0.7–10 dB at V_CE = −5 V, I_C = −0.2 mA, f = 1 kHz, and R_S = 1 kΩ. This confirmed low-noise performance distinguishes it from generic PNP transistors and validates its use in sensitive analog front-ends. The SS9015BBU datasheet lists NF in the Electrical Characteristics table under "Noise Figure".

What is the collector-emitter saturation voltage for SS9015BBU?

The SS9015BBU exhibits a collector-emitter saturation voltage (V_CE(sat)) of −0.7 V when tested at I_C = −100 mA and I_B = −5 mA (forced β = 20). This value reflects its performance in near-saturated switching or Class AB output stages. The SS9015BBU datasheet specifies V_CE(sat) in the Electrical Characteristics table under "Collector-Base Saturation Voltage" with test conditions clearly defined.

SS9015BBU 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:: PNP

Current - Collector (Ic) (Max):: 100 mA

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

Vce Saturation (Max) @ Ib, Ic:: 700mV @ 5mA, 100mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 1mA, 5V

Power - Max:: 450 mW

Frequency - Transition:: 190MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

SS9015BBU FAQ

1.How can I place an order for SS9015BBU through Aetrix?

Please submit a Request for Quotation (RFQ) for SS9015BBU 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 SS9015BBU reliable?

The price and inventory of SS9015BBU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SS9015BBU is usually 5 days.

3.What payment methods are accepted for SS9015BBU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SS9015BBU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SS9015BBU?

SS9015BBU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SS9015BBU 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 SS9015BBU?

For technical support, including SS9015BBU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SS9015BBU requirements.

6.How does Aetrix verify that SS9015BBU is sourced from the original manufacturer or authorized distributors?

All SS9015BBU 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 SS9015BBU meets industry standards.

7.What is the process for return or replacement of SS9015BBU?

All SS9015BBU units undergo pre-shipment inspection (PSI). If there is an issue with SS9015BBU, 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 SS9015BBU part is unused and in its original packaging.

Return procedure for SS9015BBU:

1.Submit a request within 90 days.

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

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