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

NXP Semiconductors BC856BT,115

Name: BC856BT,115
Brand: NXP Semiconductors
SKU: BC856BT,115
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BC856BT,115

Manufacturer:: NXP Semiconductors

Category:: Single Bipolar Transistors

Package:: SC-75, SOT-416

Datasheet:: BC856BT,115.pdf

Description:: TRANS PNP 65V 0.1A SC-75

Quantity:: RFQ Add To RFQ list

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Inventory:248,666

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Product details

Overview

BC856BT,115 from NXP Semiconductors is a PNP general-purpose bipolar junction transistor in SC-75 (SOT416) package, rated for −65 V V_CEO, −100 mA I_C, and 150 mW P_tot, optimized for low-power switching and amplification in portable battery-powered equipment.

For engineers reviewing the BC856BT,115 datasheet, BC856BT,115 pinout, BC856BT,115 application, or BC856BT,115 equivalent, key selection criteria include DC current gain range (220–475 at I_C = −2 mA), V_CE(sat) ≤ −200 mV at I_C = −10 mA/I_B = −0.5 mA, thermal resistance (833 K/W), and SC-75 footprint compatibility.

Technical Context

This PNP transistor operates with emitter grounded in common-emitter configuration, supporting linear amplification and saturated switching. Its h_FE variation across temperature (−55 °C to +150 °C) and collector current (10 μA to 100 mA) is characterized per Figures 2, 6, and 10, enabling predictable bias design in wide-temperature environments.

Base-emitter voltage ranges from −580 mV to −770 mV depending on I_C, while V_CE(sat) remains ≤ −400 mV up to I_C = −100 mA, confirming robust saturation performance under moderate load conditions without external heat sinking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−65 V: Maximum safe collector-emitter voltage with base open; defines upper rail limit in PNP switch designs.
I_C	−100 mA: Continuous DC collector current rating; sets maximum load drive capability in small-signal stages.
h_FE	220–475 at V_CE = −5 V, I_C = −2 mA: Confirmed DC current gain range for stable biasing in amplifier or switch driver circuits.
V_CE(sat)	≤ −200 mV at I_C = −10 mA / I_B = −0.5 mA: Low saturation voltage ensures minimal power loss and voltage headroom preservation in battery-operated switches.
P_tot	150 mW at T_amb ≤ 25 °C: Power dissipation limit on FR4 PCB; requires derating above 25 °C ambient per R_{th j-a} = 833 K/W.
f_T	100 MHz: Transition frequency confirms usable bandwidth up to ~10 MHz in small-signal amplifiers with proper layout.

Pinout & Package

SC-75 (SOT416) plastic surface-mount package: 1.75 mm × 1.45 mm × 0.95 mm body, 3-lead, single-row, gull-wing terminals; designed for high-density PCB layouts and reflow soldering.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased PNP operation; requires negative base current relative to emitter to turn on.
2	Emiter	Current source terminal in PNP configuration; connected to higher potential rail in typical switch applications.
3	Collector	Current sink terminal; delivers load current to ground or lower-potential node when transistor is active.

Key Features

Feature	Design Value
Low-voltage PNP switching	Rated for −65 V V_CEO and −80 V V_CBO, enabling use in 24 V and lower rail systems with margin.
High DC current gain	h_FE = 220–475 at I_C = −2 mA supports low-base-drive designs, reducing MCU GPIO loading in digital switch interfaces.
Low saturation voltage	V_CE(sat) ≤ −200 mV at light loads ensures >98% efficiency in battery-switched loads and minimizes self-heating.
Thermally characterized	R_{th j-a} = 833 K/W specified on FR4 board enables accurate junction temperature estimation without heatsink.

Applications

Portable Audio Amplifier Stages	Low-Voltage Logic-Level Switching
Use Scenario: Amplifying line-level signals in headphone drivers or microphone preamps within compact Bluetooth speakers. IC Role / Device Role / Timing Role: Small-signal PNP amplifier in common-emitter configuration with fixed bias network. Use Value: h_FE ≥ 220 ensures stable gain at I_C = −2 mA; f_T = 100 MHz supports audio bandwidth up to 20 kHz with margin.	Use Scenario: Driving LED indicators or small relays from 3.3 V or 5 V microcontroller outputs. IC Role / Device Role / Timing Role: Saturated PNP switch with base resistor limiting I_B to ensure full turn-on at I_C ≤ −100 mA. Use Value: V_CE(sat) ≤ −200 mV guarantees <0.2 V drop across collector-emitter, preserving LED forward voltage margin.
Automotive Body Control Modules	Industrial Sensor Interface Circuits
Use Scenario: Controlling 12 V solenoid valves or window motor logic in non-safety-critical vehicle subsystems. IC Role / Device Role / Timing Role: Medium-current PNP interface between MCU and load, operating over −40 °C to +125 °C ambient. Use Value: Specified h_FE and V_BE behavior across −55 °C to +150 °C (Figs. 6–7) enables robust bias design without recalibration.	Use Scenario: Level-shifting and signal conditioning for analog sensors (e.g., thermistors, RTDs) in programmable logic controllers. IC Role / Device Role / Timing Role: Active load or current mirror element in precision op-amp feedback networks. Use Value: Low ICBO (≤ −15 nA at 25 °C) minimizes input offset drift in high-impedance sensor front-ends.

Portable Audio Amplifier Stages

Low-Voltage Logic-Level Switching

Use Scenario: Amplifying line-level signals in headphone drivers or microphone preamps within compact Bluetooth speakers.

IC Role / Device Role / Timing Role: Small-signal PNP amplifier in common-emitter configuration with fixed bias network.

Use Value: h_FE ≥ 220 ensures stable gain at I_C = −2 mA; f_T = 100 MHz supports audio bandwidth up to 20 kHz with margin.

Use Scenario: Driving LED indicators or small relays from 3.3 V or 5 V microcontroller outputs.

IC Role / Device Role / Timing Role: Saturated PNP switch with base resistor limiting I_B to ensure full turn-on at I_C ≤ −100 mA.

Use Value: V_CE(sat) ≤ −200 mV guarantees <0.2 V drop across collector-emitter, preserving LED forward voltage margin.

Automotive Body Control Modules

Industrial Sensor Interface Circuits

Use Scenario: Controlling 12 V solenoid valves or window motor logic in non-safety-critical vehicle subsystems.

IC Role / Device Role / Timing Role: Medium-current PNP interface between MCU and load, operating over −40 °C to +125 °C ambient.

Use Value: Specified h_FE and V_BE behavior across −55 °C to +150 °C (Figs. 6–7) enables robust bias design without recalibration.

Use Scenario: Level-shifting and signal conditioning for analog sensors (e.g., thermistors, RTDs) in programmable logic controllers.

IC Role / Device Role / Timing Role: Active load or current mirror element in precision op-amp feedback networks.

Use Value: Low ICBO (≤ −15 nA at 25 °C) minimizes input offset drift in high-impedance sensor front-ends.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC856B,215	Same electrical specs and SC-75 package; differs only in tape-and-reel packaging (10,000 pcs vs. 3,000 pcs) and date code format.	No functional difference; identical use in all circuit roles including switching and amplification.	Select BC856B,215 for high-volume automated assembly requiring larger reel size.
MMBT3906LT1G	Higher V_CEO (−40 V), lower h_FE (100–300), same SC-70 package but not pin-compatible (pin 1 = emitter, pin 2 = base, pin 3 = collector).	Not suitable for direct replacement due to reversed pinout and reduced gain; requires PCB layout change.	Choose MMBT3906LT1G only if redesigning for alternate footprint and accepting lower gain tolerance.

Compared with BC856BT,115, BC856B,215 offers identical performance in a different reel configuration, while MMBT3906LT1G requires layout revision and provides lower DC gain-making BC856BT,115 preferable for drop-in replacement in existing SC-75 designs demanding h_FE ≥ 220.

Availability

BC856BT,115 is available at Aetrix Electronics and suitable for portable audio amplifiers, low-voltage logic-level switching, and automotive body control modules requiring stable component supply and long-term industrial availability.

Supply support for BC856BT,115 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer markets.

The BC856T series belongs to NXP's general-purpose discrete transistor product line, engineered for cost-sensitive, space-constrained applications where reliability, consistent h_FE, and SC-75 footprint compatibility are critical.

FAQ

What is the maximum collector-emitter voltage rating for BC856BT,115?

The BC856BT,115 has a maximum collector-emitter voltage (V_CEO) rating of −65 V with the base open. This rating applies specifically to the BC856AT and BC856BT variants per the NXP datasheet Limiting Values table. Exceeding this voltage risks permanent breakdown, especially under transient conditions or elevated temperature.

What is the DC current gain (h_FE) range of BC856BT,115 at typical operating conditions?

The BC856BT,115 exhibits a DC current gain (h_FE) range of 220 to 475 when measured at V_CE = −5 V and I_C = −2 mA, as confirmed in the Characteristics table on page 3 of the NXP datasheet. This gain range is guaranteed across production lots and supports stable bias design in amplifier and switch driver circuits.

Is BC856BT,115 pin-compatible with BC846T series NPN transistors?

No, BC856BT,115 is not pin-compatible with BC846T series NPN transistors despite sharing the SC-75 (SOT416) package outline. The BC856BT,115 has pin 1 = base, pin 2 = emitter, pin 3 = collector, whereas BC846T variants follow NPN pinout (pin 1 = emitter, pin 2 = base, pin 3 = collector). Interchanging them without layout revision will result in circuit failure.

What is the thermal resistance from junction to ambient for BC856BT,115?

The thermal resistance from junction to ambient (R_{th j-a}) for BC856BT,115 is 833 K/W when mounted on a standard FR4 printed-circuit board in free air, as specified in the Thermal Characteristics section of the NXP datasheet. This value must be used to calculate junction temperature rise under actual operating power dissipation.

Does BC856BT,115 support operation at elevated temperatures such as +125 °C ambient?

Yes, BC856BT,115 is rated for operation across an ambient temperature range of −65 °C to +150 °C, and its electrical characteristics-including h_FE, V_BE, and V_CE(sat)-are characterized up to +150 °C in graphical data (Figs. 2, 6–13). At +125 °C ambient, derating of P_tot is required per the 833 K/W thermal resistance to maintain T_j ≤ 150 °C.

BC856BT,115 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: SC-75, SOT-416

Packaging:: Bulk

Product Status:: Active

Transistor Type:: PNP

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

Voltage - Collector Emitter Breakdown (Max):: 65 V

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 5mA, 100mA

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

DC Current Gain (hFE) (Min) @ Ic, Vce:: 220 @ 2mA, 5V

Power - Max:: 150 mW

Frequency - Transition:: 100MHz

Operating Temperature:: 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SC-75

BC856BT,115 FAQ

1.How can I place an order for BC856BT,115 through Aetrix?

Please submit a Request for Quotation (RFQ) for BC856BT,115 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 BC856BT,115 reliable?

The price and inventory of BC856BT,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BC856BT,115 is usually 5 days.

3.What payment methods are accepted for BC856BT,115?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BC856BT,115 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BC856BT,115?

BC856BT,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BC856BT,115 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 BC856BT,115?

For technical support, including BC856BT,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BC856BT,115 requirements.

6.How does Aetrix verify that BC856BT,115 is sourced from the original manufacturer or authorized distributors?

All BC856BT,115 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 BC856BT,115 meets industry standards.

7.What is the process for return or replacement of BC856BT,115?

All BC856BT,115 units undergo pre-shipment inspection (PSI). If there is an issue with BC856BT,115, 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 BC856BT,115 part is unused and in its original packaging.

Return procedure for BC856BT,115:

1.Submit a request within 90 days.

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

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