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

onsemi BC560ATA

Name: BC560ATA
Brand: onsemi
SKU: BC560ATA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC560ATA

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: BC560ATA.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC560ATA from onsemi is a PNP epitaxial silicon transistor optimized for low-noise amplification and general-purpose switching, with V_CEO = −45 V, h_FE = 420–800 (Class C), f_T = 150 MHz, and V_BE(on) = −600 to −750 mV at I_C = −2 mA - used in audio preamplifier stages and signal conditioning circuits.

For engineers reviewing the BC560ATA datasheet, pinout, applications, or equivalent options, key selection criteria include its low-noise figure (1.2–2.0 dB at 1 kHz), TO-92-3 package compatibility, Class C h_FE gain binning, and complementarity to BC546–BC550 NPN series in push-pull amplifier designs.

Technical Context

This device operates as a medium-power, low-noise PNP bipolar junction transistor with fixed-emitter biasing capability. Its design supports linear amplification up to 150 MHz and switching with V_CE(sat) ≤ −650 mV at I_C = −100 mA / I_B = −5 mA.

Thermal performance is defined by R_JA = 250 °C/W and P_D = 500 mW at T_A = 25 °C, derating 4.0 mW/°C above ambient - suitable for through-hole PCB layouts with minimum FR-4 land pattern per case 135AR.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−45 V - maximum collector-emitter blocking voltage in common-emitter configuration, enabling use in 36 V rail systems with safety margin.
h_FE (Class C)	420–800 - high DC current gain bin ensuring stable biasing in low-input-current amplifier stages without external gain-setting resistors.
f_T	150 MHz - unity-gain bandwidth confirming suitability for audio-frequency amplification and narrowband RF preamp applications up to ~50 MHz.
Noise Figure	1.2–2.0 dB @ 1 kHz - verified low-noise performance critical for microphone preamps and sensor signal conditioning where SNR preservation is essential.
P_D	500 mW - continuous power dissipation rating defining thermal limits for sustained operation in compact TO-92 enclosures without heatsinking.
V_BE(on)	−600 to −750 mV @ I_C = −2 mA - predictable base turn-on threshold enabling accurate bias network design with standard resistor values.

Pinout & Package

BC560ATA is housed in a TO-92-3 plastic package (case 135AR), lead-formed for through-hole mounting, with standardized pin assignment: Pin 1 = Collector, Pin 2 = Base, Pin 3 = Emitter.

Pin/Terminal	Circuit Role	Design Meaning
1 (Collector)	Current sink terminal	Connected to negative supply rail or load return path; handles full output current up to −100 mA DC.
2 (Base)	Control input	Receives bias current to regulate collector-emitter conduction; requires current-limiting resistor for safe drive from microcontroller GPIO or op-amp output.
3 (Emitter)	Reference terminal	Typically tied to ground or positive rail in PNP configurations; establishes reference point for V_BE and h_FE-based gain calculations.

Key Features

Feature	Design Value
Low-noise amplification	1.2–2.0 dB NF at 1 kHz enables high-fidelity audio front-end designs without added noise-cancelling circuitry.
High h_FE Class C binning	Guaranteed 420–800 h_FE ensures consistent DC bias stability across production lots in discrete gain stages.
Complementary NPN pairing	Designed as direct counterpart to BC546–BC550 series, simplifying push-pull, differential pair, and phase-splitter layout in analog circuits.
Pb-free, RoHS-compliant packaging	TO-92-3 case 135AR meets global environmental compliance requirements without derating or reliability penalties.

Applications

Audio Preamp Stage	Signal Level Shifting
Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors before ADC sampling. IC Role / Device Role / Timing Role: Low-noise PNP transconductance amplifier operating in common-emitter configuration with emitter degeneration. Use Value: 1.2–2.0 dB noise figure preserves SNR in sub-10 mV_pp input signals, avoiding need for costly op-amp alternatives.	Use Scenario: Converting logic-level signals between −5 V and 0 V domains in legacy industrial control interfaces. IC Role / Device Role / Timing Role: Active level translator using emitter-follower or common-base topology for bidirectional voltage translation. Use Value: −45 V V_CEO and −5 V V_EBO support reliable operation across extended voltage rails without clamping diodes.
Discrete Power Switch	Current Mirror Reference
Use Scenario: Driving LED arrays or small solenoids from microcontroller outputs requiring inverted logic control. IC Role / Device Role / Timing Role: Saturated PNP switch with base current limiting and collector load connection to negative rail. Use Value: V_CE(sat) ≤ −650 mV at −100 mA ensures < 0.7 W dissipation and > 90% efficiency in 24 V load switching.	Use Scenario: Establishing matched bias currents in analog ICs or discrete op-amp compensation networks. IC Role / Device Role / Timing Role: Precision current source element in two-transistor mirror configuration with matched h_FE and thermal tracking. Use Value: Tight h_FE binning (Class C) and low V_BE variation reduce mirror ratio error to < ±3% over temperature.

Audio Preamp Stage

Signal Level Shifting

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

IC Role / Device Role / Timing Role: Low-noise PNP transconductance amplifier operating in common-emitter configuration with emitter degeneration.

Use Value: 1.2–2.0 dB noise figure preserves SNR in sub-10 mV_pp input signals, avoiding need for costly op-amp alternatives.

Use Scenario: Converting logic-level signals between −5 V and 0 V domains in legacy industrial control interfaces.

IC Role / Device Role / Timing Role: Active level translator using emitter-follower or common-base topology for bidirectional voltage translation.

Use Value: −45 V V_CEO and −5 V V_EBO support reliable operation across extended voltage rails without clamping diodes.

Discrete Power Switch

Current Mirror Reference

Use Scenario: Driving LED arrays or small solenoids from microcontroller outputs requiring inverted logic control.

IC Role / Device Role / Timing Role: Saturated PNP switch with base current limiting and collector load connection to negative rail.

Use Value: V_CE(sat) ≤ −650 mV at −100 mA ensures < 0.7 W dissipation and > 90% efficiency in 24 V load switching.

Use Scenario: Establishing matched bias currents in analog ICs or discrete op-amp compensation networks.

IC Role / Device Role / Timing Role: Precision current source element in two-transistor mirror configuration with matched h_FE and thermal tracking.

Use Value: Tight h_FE binning (Class C) and low V_BE variation reduce mirror ratio error to < ±3% over temperature.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC559CTA	Lower h_FE range (420–800 same bin, but typical NF = 1.2–4.0 dB vs. BC560ATA's 1.2–2.0 dB); V_CEO = −30 V	Suitable for lower-voltage (< 24 V) audio paths where noise margin is less critical	Select when cost sensitivity outweighs noise performance and voltage headroom requirements
BC557BTA	h_FE = 200–450 (Class B), V_CEO = −45 V, NF = 2–10 dB - broader gain spread and higher noise floor	Better for general-purpose switching than precision amplification due to gain variability	Choose for non-critical bias networks or digital logic inversion where tight h_FE matching is unnecessary

Compared with BC559CTA and BC557BTA, BC560ATA delivers superior noise performance and guaranteed high-gain consistency within Class C, making it the preferred choice for low-noise analog signal chains requiring both voltage headroom and gain stability.

Availability

BC560ATA is available at Aetrix Electronics and suitable for audio preamplifiers, industrial signal conditioners, and discrete power switches requiring stable component supply, long-term obsolescence management, and RoHS-compliant through-hole assembly.

Supply support for BC560ATA 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, and sensing solutions for automotive, industrial, and cloud infrastructure markets.

The BC560ATA belongs to the BC556–BC560 PNP transistor family designed specifically for low-noise amplification and complementary switching in cost-sensitive, high-reliability analog circuits.

FAQ

What is the maximum collector-emitter voltage rating for BC560ATA?

The BC560ATA has a maximum collector-emitter voltage (V_CEO) rating of −45 V, verified per onsemi's datasheet Absolute Maximum Ratings table. This rating applies under DC conditions at T_A = 25 °C and defines the upper limit for reverse-biased collector-to-emitter voltage before breakdown. Exceeding this value risks permanent device damage and must be avoided in all operating conditions for BC560ATA.

Is BC560ATA suitable for low-noise audio amplifier applications?

Yes, BC560ATA is explicitly characterized for low-noise operation with a noise figure of 1.2–2.0 dB at 1 kHz, per onsemi's Electrical Characteristics table. Its Class C h_FE binning and 150 MHz f_T further support high-fidelity audio preamplifier use. BC560ATA is recommended over BC557/BC559 variants where minimal signal degradation is required in microphone or sensor front-end stages.

What package type and pin configuration does BC560ATA use?

BC560ATA uses the TO-92-3 plastic package (case 135AR), with lead-formed terminals for through-hole mounting. Pinout is standardized: Pin 1 = Collector, Pin 2 = Base, Pin 3 = Emitter - confirmed in the Marking Diagram and Mechanical Case Outline sections of the official onsemi datasheet.

How does BC560ATA compare to BC557BTA in terms of DC current gain?

BC560ATA is rated Class C with h_FE = 420–800, while BC557BTA is Class B with h_FE = 200–450. This means BC560ATA guarantees higher and tighter DC current gain, improving bias point stability in amplifier stages. The difference is documented in the h_FE Classification table of the BC556–BC560 datasheet, directly impacting gain predictability in BC560ATA designs.

Does BC560ATA meet RoHS and halogen-free compliance standards?

Yes, BC560ATA is Pb-free, halogen-free/BFR-free, and RoHS compliant, as stated in the Features section of the official onsemi datasheet. This compliance is inherent to the TO-92-3 case 135AR packaging and confirmed in the ordering information table, supporting environmentally regulated industrial and consumer product deployments.

BC560ATA 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:: PNP

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

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

Vce Saturation (Max) @ Ib, Ic:: 650mV @ 5mA, 100mA

Current - Collector Cutoff (Max):: 15nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 110 @ 2mA, 5V

Power - Max:: 500 mW

Frequency - Transition:: 150MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

BC560ATA FAQ

1.How can I place an order for BC560ATA through Aetrix?

Please submit a Request for Quotation (RFQ) for BC560ATA 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 BC560ATA reliable?

The price and inventory of BC560ATA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC560ATA is usually 5 days.

3.What payment methods are accepted for BC560ATA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC560ATA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC560ATA?

BC560ATA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC560ATA 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 BC560ATA?

For technical support, including BC560ATA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC560ATA requirements.

6.How does Aetrix verify that BC560ATA is sourced from the original manufacturer or authorized distributors?

All BC560ATA 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 BC560ATA meets industry standards.

7.What is the process for return or replacement of BC560ATA?

All BC560ATA units undergo pre-shipment inspection (PSI). If there is an issue with BC560ATA, 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 BC560ATA part is unused and in its original packaging.

Return procedure for BC560ATA:

1.Submit a request within 90 days.

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

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