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

onsemi BC856CMTF

Name: BC856CMTF
Brand: onsemi
SKU: BC856CMTF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC856CMTF

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

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

Datasheet:: BC856CMTF.pdf

Description:: TRANS PNP 65V 0.1A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:2,906

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Product details

Overview

BC856CMTF from ON Semiconductor is a PNP epitaxial silicon transistor in SOT-23 package, rated for -65 V V_CEO, -100 mA I_C, and 310 mW power dissipation, with h_FE of 420–800 at -5 V V_CE and -2 mA I_C, used in low-noise amplifier and general-purpose switching circuits.

For engineers reviewing the BC856CMTF datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, validated SOT-23 terminal mapping, confirmed h_FE classification (C-grade), noise figure (2–10 dB), and direct alternatives for discrete PNP switching/amplifier design.

Technical Context

The BC856CMTF operates as a medium-voltage, medium-current PNP bipolar junction transistor optimized for linear amplification and saturated switching. Its h_FE range (420–800) enables high-current gain stability across bias conditions, while its f_T of 150 MHz supports RF-capable small-signal amplification up to VHF bands.

Designed as a complement to BC846–BC850 NPN series, it shares identical SOT-23 footprint and thermal characteristics (T_J = 150°C, T_STG = −65 to 150°C). Low V_CE(sat) (−90 mV typ. at −10 mA/−0.5 mA) and V_BE(sat) (−700 mV typ.) ensure efficient operation in low-voltage logic-level drive applications.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−65 V: Maximum collector-emitter voltage before breakdown in common-emitter configuration, enabling use in 48 V rail and industrial control circuits.
I_C (DC)	−100 mA: Continuous collector current rating, supporting moderate-power load switching and driver-stage amplification.
h_FE	420–800 at V_CE = −5 V, I_C = −2 mA: High DC current gain ensures minimal base drive requirement in amplifier and switch bias networks.
f_T	150 MHz: Current gain–bandwidth product confirms suitability for audio and low-VHF signal amplification without external compensation.
NF	2–10 dB at V_CE = −5 V, I_C = −200 µA, RG = 2 kΩ, f = 1 kHz: Low noise performance validated for preamplifier and sensor interface stages.
C_ob	6 pF at V_CB = −10 V: Output capacitance limits high-frequency roll-off and defines bandwidth in tuned amplifier designs.

Pinout & Package

SOT-23 plastic surface-mount package with gull-wing leads, 1.90 mm × 1.30 mm body size, 0.95 mm lead pitch, and JEDEC-compliant thermal profile (P_C = 310 mW at T_A = 25°C).

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control electrode for forward-active and saturation biasing; requires current-limited drive due to h_FE-dependent base current demand.
2	Emitter	Current source terminal in PNP configuration; connected to higher potential rail in common-emitter switching topologies.
3	Collector	Output current sink terminal; voltage swing limited by V_CEO = −65 V and thermal derating above 25°C ambient.

Key Features

Feature	Design Value
h_FE Classification C	Guaranteed 420–800 gain range enables predictable bias point selection without post-manufacture sorting.
Low V_CE(sat)	−90 mV typical at −10 mA/−0.5 mA ensures <1% voltage drop in saturated switching, reducing power loss in digital logic interfaces.
Low-noise operation	2 dB noise figure (BC856/857/858 group) supports high-SNR analog front-ends in sensor signal conditioning.
Complementary pairing	Direct match to BC846–BC850 NPN family allows matched push-pull and differential pair implementation with consistent thermal behavior.

Applications

Audio Pre-amplifier Stage	Industrial Logic-Level Interface
Use Scenario: Amplifying weak microphone or piezoelectric sensor signals in battery-powered portable audio devices. IC Role / Device Role / Timing Role: Discrete PNP transistor configured in common-emitter topology for voltage gain with emitter degeneration. Use Value: 420–800 h_FE and 2 dB noise figure enable >60 dB SNR at 1 kHz with minimal component count and no active feedback compensation.	Use Scenario: Level-shifting 3.3 V microcontroller outputs to drive 12 V relay coils or optocoupler inputs in PLC I/O modules. IC Role / Device Role / Timing Role: Saturated PNP switch with base resistor network controlling collector current sink to ground-referenced loads. Use Value: −90 mV V_CE(sat) and −700 mV V_BE(sat) minimize conduction loss and ensure reliable turn-on with standard GPIO drive capability.
Automotive Body Control Module	Consumer Appliance Power Sequencing
Use Scenario: Driving LED status indicators and small solenoids in 12 V automotive cabin electronics with ESD and load-dump tolerance. IC Role / Device Role / Timing Role: General-purpose PNP switch handling intermittent 100 mA loads with built-in V_CEO margin against transients. Use Value: −65 V V_CEO and 150°C T_J rating support operation in under-hood temperature environments without derating below 80 mA.	Use Scenario: Enabling sequential power-up of subsystems (e.g., display backlight before main MCU) in smart home appliances using discrete timing RC networks. IC Role / Device Role / Timing Role: PNP-based delay element where base charging time controls collector conduction onset. Use Value: Tight h_FE distribution (C-grade) ensures repeatable RC time constants across production batches, eliminating calibration.

Audio Pre-amplifier Stage

Industrial Logic-Level Interface

Use Scenario: Amplifying weak microphone or piezoelectric sensor signals in battery-powered portable audio devices.

IC Role / Device Role / Timing Role: Discrete PNP transistor configured in common-emitter topology for voltage gain with emitter degeneration.

Use Value: 420–800 h_FE and 2 dB noise figure enable >60 dB SNR at 1 kHz with minimal component count and no active feedback compensation.

Use Scenario: Level-shifting 3.3 V microcontroller outputs to drive 12 V relay coils or optocoupler inputs in PLC I/O modules.

IC Role / Device Role / Timing Role: Saturated PNP switch with base resistor network controlling collector current sink to ground-referenced loads.

Use Value: −90 mV V_CE(sat) and −700 mV V_BE(sat) minimize conduction loss and ensure reliable turn-on with standard GPIO drive capability.

Automotive Body Control Module

Consumer Appliance Power Sequencing

Use Scenario: Driving LED status indicators and small solenoids in 12 V automotive cabin electronics with ESD and load-dump tolerance.

IC Role / Device Role / Timing Role: General-purpose PNP switch handling intermittent 100 mA loads with built-in V_CEO margin against transients.

Use Value: −65 V V_CEO and 150°C T_J rating support operation in under-hood temperature environments without derating below 80 mA.

Use Scenario: Enabling sequential power-up of subsystems (e.g., display backlight before main MCU) in smart home appliances using discrete timing RC networks.

IC Role / Device Role / Timing Role: PNP-based delay element where base charging time controls collector conduction onset.

Use Value: Tight h_FE distribution (C-grade) ensures repeatable RC time constants across production batches, eliminating calibration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC856BMTF	h_FE = 200–450 (B-grade), otherwise identical absolute ratings and pinout.	Lower gain reduces base drive sensitivity but increases consistency in high-temperature switching where h_FE drift matters.	Select BC856BMTF when stable on/off behavior under thermal stress is prioritized over maximum small-signal gain.
MMBT856	Same die, same h_FE C-grade spec, but marked as MMBT856 and distributed by ON Semiconductor under legacy Fairchild branding.	No functional difference; used interchangeably in new designs where part number consolidation is required.	Choose MMBT856 when sourcing through ON Semiconductor's consolidated catalog or when aligning with post-integration part numbering conventions.

Compared with BC856CMTF, BC856BMTF trades gain bandwidth for thermal stability in saturated switching, while MMBT856 offers identical electrical performance with updated nomenclature-both preserve SOT-23 footprint and require no layout change.

Availability

BC856CMTF is available at Aetrix Electronics and suitable for industrial control systems, consumer audio signal chains, and automotive body electronics requiring stable component supply with guaranteed h_FE grading and tape-and-reel delivery.

Supply support for BC856CMTF 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 is a global semiconductor manufacturer specializing in energy-efficient power management, analog, and discrete components for automotive, industrial, and cloud infrastructure markets.

The BC856CMTF belongs to ON Semiconductor's legacy Fairchild discrete transistor portfolio, designed specifically for cost-sensitive, high-volume PNP switching and amplification applications demanding tight h_FE binning and robust SOT-23 reliability.

FAQ

What is the h_FE range specified for BC856CMTF?

The BC856CMTF is classified as "C-grade", with a guaranteed DC current gain (h_FE) range of 420 to 800 measured at V_CE = −5 V and I_C = −2 mA. This binning ensures consistent biasing in amplifier and switching circuits without post-production gain screening. The BC856CMTF datasheet confirms this specification under the h_FE Classification table.

Does BC856CMTF support low-noise audio applications?

Yes, BC856CMTF is validated for low-noise operation with a noise figure of 2 dB (typical) at V_CE = −5 V, I_C = −200 µA, R_G = 2 kΩ, and f = 1 kHz - matching the BC856/857/858 group specification. This makes BC856CMTF suitable for microphone preamplifiers and sensor signal conditioning where SNR is critical.

What is the maximum collector-emitter voltage rating for BC856CMTF?

The BC856CMTF has a maximum collector-emitter voltage (V_CEO) rating of −65 V, verified in the Absolute Maximum Ratings table. This allows safe operation in 48 V industrial bus systems and automotive 12 V circuits with transient margin, provided junction temperature remains within 150°C limits.

Is BC856CMTF pin-compatible with other BC856 variants?

Yes, all BC856xMTF variants-including BC856AMTF, BC856BMTF, and BC856CMTF-share identical SOT-23 package dimensions, pinout (1=Base, 2=Emitter, 3=Collector), and thermal characteristics. Only h_FE binning differs; no PCB redesign is needed when substituting between A/B/C grades.

What packaging format does BC856CMTF ship in?

BC856CMTF ships in tape-and-reel format per the Ordering Information table, with 3,000 units per reel. The "TF" suffix explicitly denotes tape-and-reel packing, and the device marking "9AC" corresponds to the C-grade h_FE bin. This format supports automated SMT placement in high-volume manufacturing.

BC856CMTF 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):: 65 V

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

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 420 @ 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

BC856CMTF FAQ

1.How can I place an order for BC856CMTF through Aetrix?

Please submit a Request for Quotation (RFQ) for BC856CMTF 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 BC856CMTF reliable?

The price and inventory of BC856CMTF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856CMTF is usually 5 days.

3.What payment methods are accepted for BC856CMTF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856CMTF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC856CMTF?

BC856CMTF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC856CMTF 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 BC856CMTF?

For technical support, including BC856CMTF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856CMTF requirements.

6.How does Aetrix verify that BC856CMTF is sourced from the original manufacturer or authorized distributors?

All BC856CMTF 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 BC856CMTF meets industry standards.

7.What is the process for return or replacement of BC856CMTF?

All BC856CMTF units undergo pre-shipment inspection (PSI). If there is an issue with BC856CMTF, 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 BC856CMTF part is unused and in its original packaging.

Return procedure for BC856CMTF:

1.Submit a request within 90 days.

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

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