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

onsemi BC860AMTF

Name: BC860AMTF
Brand: onsemi
SKU: BC860AMTF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC860AMTF

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BC860AMTF.pdf

Description:: TRANS PNP 45V 0.1A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

BC860AMTF from ON Semiconductor is a PNP epitaxial silicon transistor optimized for low-noise amplifier and switching applications, with V_CEO = −45 V, I_C = −100 mA, h_FE = 110–220 (Class A), f_T = 150 MHz, and NF = 1.2 dB at 30–15 kHz - deployed in audio preamplifier stages and precision current mirror circuits.

For engineers reviewing the BC860AMTF datasheet, pinout, applications, or equivalent options, key selection considerations include its SOT-23 package compatibility, low-noise performance in small-signal amplification, h_FE classification consistency, and complementary pairing with BC846–BC850 NPN series.

Technical Context

This PNP transistor uses epitaxial base construction to achieve tight h_FE distribution (Class A: 110–220) and low noise figure (1.2 dB, 30–15 kHz), enabling stable biasing in high-fidelity analog front-ends. Its V_CB0 = −50 V and V_CEO = −45 V support operation in moderate-voltage negative-rail signal paths.

The device exhibits V_BE(sat) = −700 mV at I_C = −10 mA / I_B = −0.5 mA and V_CE(sat) = −90 mV under same conditions - confirming suitability for saturated-switching roles where low on-state loss is critical in discrete logic or power-control interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−45 V: Maximum collector-emitter voltage before breakdown in common-emitter configuration - defines safe operating range in negative-rail amplifier or switch designs.
h_FE (Class A)	110–220 at V_CE = −5 V, I_C = −2 mA: Predictable DC current gain band enabling accurate bias network design without iterative trimming.
f_T	150 MHz at V_CE = −5 V, I_C = −10 mA: Supports stable small-signal amplification up to mid-VHF range in RF detector or IF stage applications.
Noise Figure	1.2 dB at V_CE = −5 V, I_C = −200 µA, RG = 2 kΩ, 30–15 kHz: Meets low-noise requirements for microphone preamps and sensor signal conditioning.
P_C	310 mW at T_A = 25°C: Enables continuous operation at I_C ≤ −62 mA with 50°C ambient rise - sufficient for Class-A line drivers and active filters.
C_ob	6 pF at V_CB = −10 V, f = 1 MHz: Limits Miller capacitance impact in high-gain amplifier configurations, preserving bandwidth stability.

Pinout & Package

SOT-23 plastic surface-mount package (3-pin, standard lead pitch 0.95 mm), dimensions per JEDEC TO-236AB; matte finish, tape-and-reel packaging (3000 pcs/reel).

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-active and saturation biasing; requires current-limiting resistor in linear or switching use.
2	Emitter	Current source terminal in PNP operation; connected to higher potential rail (e.g., V_CC or regulated negative supply).
3	Collector	Output terminal carrying load current; referenced to lower-potential node (e.g., ground or signal return path).

Key Features

Feature	Design Value
Low-noise amplifier grade	1.2 dB NF at audio band (30–15 kHz) enables use in microphone preamp and sensor interface without added op-amp stages.
Class A h_FE binning	Guaranteed 110–220 h_FE ensures predictable DC bias point across production lots - reduces need for post-layout gain calibration.
Complementary NPN pairing	Designed as direct counterpart to BC846–BC850 series, simplifying push-pull, differential pair, and current mirror implementation.
SOT-23 tape-and-reel	Standardized 3000-unit reel format supports automated pick-and-place assembly with no custom feeder setup required.

Applications

Audio Preamp Stage	Current Mirror Reference
Use Scenario: Low-level signal amplification from electret microphone or piezoelectric sensor in battery-powered voice recorder. IC Role / Device Role / Timing Role: Discrete PNP transistor configured in common-emitter topology for 20–20 kHz voltage gain with minimal added noise. Use Value: 1.2 dB noise figure and 150 MHz f_T preserve SNR and transient fidelity without requiring ultra-low-noise op-amps.	Use Scenario: Precision current replication in analog front-end of 16-bit ADC driver circuit with matched thermal tracking. IC Role / Device Role / Timing Role: Active component in two-transistor current mirror, biased at I_C = −1 mA to replicate reference current into signal path. Use Value: Tight h_FE binning (110–220) and low V_BE(on) variation (−600 to −750 mV) minimize mirror ratio error below ±1.5%.
Discrete Logic Inverter	Negative-Rail Switch Driver
Use Scenario: Level-shifting inverter for 3.3 V CMOS control signal driving −5 V analog switch enable input. IC Role / Device Role / Timing Role: Saturated PNP switch turning on/off pull-up to −5 V rail with <100 ns propagation delay. Use Value: V_CE(sat) = −90 mV at I_C = −10 mA ensures <10 mW dissipation and clean logic transition edges.	Use Scenario: High-side switch controlling −12 V power rail to analog subsystem in industrial PLC I/O module. IC Role / Device Role / Timing Role: PNP emitter-follower configured for low-impedance drive of capacitive gate load (e.g., PMOS FET gate). Use Value: 310 mW power rating and 150°C junction temperature allow sustained −100 mA pulsed output without derating at 70°C ambient.

Audio Preamp Stage

Current Mirror Reference

Use Scenario: Low-level signal amplification from electret microphone or piezoelectric sensor in battery-powered voice recorder.

IC Role / Device Role / Timing Role: Discrete PNP transistor configured in common-emitter topology for 20–20 kHz voltage gain with minimal added noise.

Use Value: 1.2 dB noise figure and 150 MHz f_T preserve SNR and transient fidelity without requiring ultra-low-noise op-amps.

Use Scenario: Precision current replication in analog front-end of 16-bit ADC driver circuit with matched thermal tracking.

IC Role / Device Role / Timing Role: Active component in two-transistor current mirror, biased at I_C = −1 mA to replicate reference current into signal path.

Use Value: Tight h_FE binning (110–220) and low V_BE(on) variation (−600 to −750 mV) minimize mirror ratio error below ±1.5%.

Discrete Logic Inverter

Negative-Rail Switch Driver

Use Scenario: Level-shifting inverter for 3.3 V CMOS control signal driving −5 V analog switch enable input.

IC Role / Device Role / Timing Role: Saturated PNP switch turning on/off pull-up to −5 V rail with <100 ns propagation delay.

Use Value: V_CE(sat) = −90 mV at I_C = −10 mA ensures <10 mW dissipation and clean logic transition edges.

Use Scenario: High-side switch controlling −12 V power rail to analog subsystem in industrial PLC I/O module.

IC Role / Device Role / Timing Role: PNP emitter-follower configured for low-impedance drive of capacitive gate load (e.g., PMOS FET gate).

Use Value: 310 mW power rating and 150°C junction temperature allow sustained −100 mA pulsed output without derating at 70°C ambient.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC857AMTF	V_CEO = −45 V (same), but h_FE Class A = 110–220 (identical); V_CB0 = −50 V (same), yet NF = 2 dB (vs. 1.2 dB for BC860AMTF).	Higher noise figure limits use in ultra-low-noise audio paths but remains suitable for general-purpose switching and medium-fidelity amplification.	Select BC857AMTF when noise performance is secondary to cost or inventory consolidation across BC856–BC860 family.
MMBT3906LT1G	Same SOT-23 package and PNP polarity; h_FE = 100–300 (broader spread), V_CEO = −40 V (5 V lower), NF = 10 dB (significantly higher).	Not recommended for low-noise audio; acceptable for digital switching and non-critical bias networks where h_FE tolerance >±30% is acceptable.	Choose MMBT3906LT1G only for cost-sensitive, non-audio applications where tighter h_FE control and sub-2 dB noise are not required.

Compared with BC857AMTF and MMBT3906LT1G, BC860AMTF delivers superior noise performance (1.2 dB) and tighter h_FE consistency - making it the preferred choice for audio preamplifiers and precision current mirrors where signal integrity is critical.

Availability

BC860AMTF is available at Aetrix Electronics and suitable for audio preamplifier design, precision current mirror circuits, and negative-rail discrete logic requiring stable component supply, consistent h_FE binning, and low-noise operation.

Supply support for BC860AMTF 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

ON Semiconductor (formerly Fairchild Semiconductor) is a global supplier of energy-efficient semiconductor components, specializing in power management, analog, and discrete devices for automotive, industrial, and consumer markets.

The BC860AMTF belongs to the BC856–BC860 PNP transistor family, designed specifically for low-noise amplification and reliable switching in space-constrained SMT applications where consistent h_FE and thermal stability are essential.

FAQ

What is the h_FE range for BC860AMTF?

The BC860AMTF has a guaranteed DC current gain (h_FE) range of 110 to 220 at V_CE = −5 V and I_C = −2 mA, corresponding to Class A binning per the official ON Semiconductor datasheet. This tight h_FE window ensures repeatable biasing in amplifier and current mirror designs without manual gain adjustment. The BC860AMTF specification is validated across production lots and applies directly to the marked device.

Does BC860AMTF support low-noise audio applications?

Yes, BC860AMTF is explicitly characterized for low-noise operation with a noise figure of 1.2 dB at V_CE = −5 V, I_C = −200 µA, R_G = 2 kΩ, and frequency range 30–15,000 Hz - meeting requirements for electret microphone preamplifiers and sensor signal conditioning. Its BC859/BC860-specific noise rating distinguishes it from earlier variants like BC856/BC857, and this value is confirmed in the original Fairchild/ON Semiconductor datasheet Rev. B.

What package type and marking does BC860AMTF use?

BC860AMTF is supplied in the SOT-23 surface-mount package with matte finish and tape-and-reel packaging (3000 units per reel). Its top-side marking is "9EA", which uniquely identifies the BC860A variant in the BC856–BC860 family. Pin configuration is standardized: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector - verified in mechanical drawings and ordering information tables.

How does BC860AMTF differ from BC857AMTF?

BC860AMTF and BC857AMTF share identical V_CEO (−45 V), V_CB0 (−50 V), and h_FE Class A (110–220), but BC860AMTF specifies a lower noise figure (1.2 dB vs. 2 dB) and is rated over a wider audio bandwidth (30–15 kHz vs. 1–4 kHz for BC857AMTF). These differences make BC860AMTF preferable for high-fidelity analog signal paths, while BC857AMTF remains suitable for general-purpose switching.

Is BC860AMTF pin-compatible with other transistors in the BC8xx series?

Yes, BC860AMTF uses the standard SOT-23 pinout (Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector), matching all members of the BC856–BC860 family including BC856AMTF through BC860CMTF. This uniform pin assignment enables drop-in replacement within the same h_FE class and voltage rating tier, provided noise and bandwidth requirements are verified for the target application.

BC860AMTF Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

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:: 310 mW

Frequency - Transition:: 150MHz

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BC860AMTF FAQ

1.How can I place an order for BC860AMTF through Aetrix?

Please submit a Request for Quotation (RFQ) for BC860AMTF 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 BC860AMTF reliable?

The price and inventory of BC860AMTF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC860AMTF is usually 5 days.

3.What payment methods are accepted for BC860AMTF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC860AMTF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC860AMTF?

BC860AMTF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC860AMTF 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 BC860AMTF?

For technical support, including BC860AMTF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC860AMTF requirements.

6.How does Aetrix verify that BC860AMTF is sourced from the original manufacturer or authorized distributors?

All BC860AMTF 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 BC860AMTF meets industry standards.

7.What is the process for return or replacement of BC860AMTF?

All BC860AMTF units undergo pre-shipment inspection (PSI). If there is an issue with BC860AMTF, 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 BC860AMTF part is unused and in its original packaging.

Return procedure for BC860AMTF:

1.Submit a request within 90 days.

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

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