BC857B The BC857B is a PNP general purpose transistor from Infineon Technologies. It features a collector-emitter voltage of 45V, collector current of 100mA, and is housed in a surface-mount SOT-23 package.
Mfr Part #:

BC857B

Available from 1 distributors
Mfr Name: Infineon Technologies
Infineon Technologies
The BC857B is a PNP general purpose transistor from Infineon Technologies. It features a collector-emitter voltage of 45V, collector current of 100mA, and is housed in a surface-mount SOT-23 package.
Total Stock: 100 pcs

BC857B Available from 1 distributor

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BC857B Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Automotive Grade
Base Current (I_B)
Case Material
Collector-Base Voltage (V_CBO)
Collector-Emitter Saturation Voltage (V_CEsat) (Maximum @ I_C=10 mA, I_B=0.5 mA)
Conflict Minerals
Current
DC Current Gain (hFE) (Min) @ Ic, Vce
DC Current Gain (h_FE) (Minimum @ V_CE=5 V, I_C=10 µA)
Emitter-Base Voltage (V_EBO)
Frequency
Industrial Grade
Mounting Type
Operating Temperature
Peak Base Current (I_BM)
Peak Collector Current (I_CM)
Power
Solder Temperature
Standard Package Quantity
Storage Temperature (T_stg)
Supplier Device Package
Tape & Reel
Termination Style
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage
Weight

BC857B Description

Short technical summary and product information.

The BC857B is a PNP bipolar junction transistor designed for general purpose switching and amplification. It is part of the BC857 series and offers a collector-emitter voltage rating of 45V and a continuous collector current of 100mA.

 

Electrical characteristics include a DC current gain (hFE) ranging from 220 to 475 at VCE=5V, IC=2mA. The transition frequency is 100 MHz. Collector-emitter saturation voltage is 300mV at IC=10mA, IB=0.5mA and 650mV at IC=100mA, IB=5mA. Power dissipation is 300mW when mounted on PCB with minimum pad.

 

The transistor comes in a SOT-23 (TO-236, SC-59) surface-mount package. It is RoHS3 compliant, REACH unaffected, and has MSL level 1. Standard packaging is tape and reel with 3000 units per reel.

 

Applications include signal processing, switching circuits, and amplification in consumer and industrial electronics. The complementary NPN type is BC847B.

BC857B Quick Information

Product Type: Bipolar Transistor - Single
Canonical Name: BC857B PNP General Purpose Transistor
Subcategory: General Purpose Transistor

BC857B Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

BC857B Features

  • PNP general purpose bipolar junction transistor.
  • Rated for 45V collector-emitter voltage.
  • Supports up to 100mA continuous collector current.
  • Surface-mount SOT-23 package for compact designs.
  • RoHS3 compliant and MSL level 1.

BC857B Applications

  • Ideal for general purpose switching circuits.
  • Used in signal amplification stages.
  • Suitable for consumer electronics and industrial control.

BC857B FAQs

7 frequently asked questions generated from this part’s specifications.
What is the maximum collector-emitter voltage of the BC857B?

45V.

What is the package type of the BC857B?

SOT-23 (TO-236, SC-59).

What is the operating temperature range?

-55°C to +150°C.

Is the BC857B RoHS compliant?

Yes, RoHS3 compliant.

What is the DC current gain (hFE) of the BC857B?

At VCE=5V, IC=2mA, hFE is 220 minimum, 290 typical, 475 maximum.

What is the collector-emitter saturation voltage?

300mV at IC=10mA, IB=0.5mA; 650mV at IC=100mA, IB=5mA.

What is the power dissipation of the BC857B?

300mW when mounted on PCB with minimum pad.

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