BC858B PNP General purpose transistor Datasheet llOutline SOT-23 　 　 Parameter Value 　 　 V -30V CEO 　　 I -100mA C 　　 SST3 　 llFeatures llInner circuit 1)BV ＞-30V (I =-1mA) CEO C 2)Complements the BC848B llApplication AUDIO FREQUENCY SMALL SIGNAL AMPLIFIER llPackaging specifications Basic Package Taping Reel size Tape width Part No. Package ordering Marking size code (mm) (mm) unit.(pcs) SOT-23 BC858B 2924 T116 180 8 3000 G3K (SST3) 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 www.rohm.com © 2016 ROHM Co., Ltd. All rights reserved. 1/6 20160606 - Rev.002

BC858B 　 　 　 Datasheet llAbsolute maximum ratings (T = 25°C) a Parameter Symbol Values Unit Collector-base voltage V -30 V CBO Collector-emitter voltage V -30 V CEO Emitter-base voltage V -5 V EBO Collector current I -100 mA C P *1 200 mW D Power dissipation P *2 350 mW D Junction temperature T 150 ℃ j Range of storage temperature T -65 to +150 ℃ stg llElectrical characteristics (T = 25°C) a Values Parameter Symbol Conditions Unit Min. Typ. Max. Collector-base breakdown BV I = -50μA -30 - - V voltage CBO C Collector-emitter breakdown BV I = -1mA -30 - - V voltage CEO C Emitter-base breakdown voltage BV I = -50μA -5 - - V EBO E V = -30V - - -100 nA CB Collector cut-off current I CBO V = -30V, T = 150℃ - - -4 μA CB a V 1 I = -10mA, I = -0.5mA - - -300 mV CE(sat) C B Collector-emitter saturation voltage V 2 I = -100mA, I = -5mA - - -650 mV CE(sat) C B Base-emitter turn V V = -5V, I = -10mA -600 - -750 mV on voltage BE(on) CE C DC current gain h V = -5V, I = -2mA 210 - 480 - FE CE C V = -5V, I = 20mA, CE E Transition frequency f - 250 - MHz T f = 100MHz V = -10V, I = 0A Output capacitance C CB E - 4.5 - pF ob f = 1MHz *1 Each terminal mounted on a reference land. *2 Mounted on a ceramic board(7.0×5.0×0.6mm). 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　　 　 　 　　　 　 　 　 　　 　 　 　　　 　 　 　 　　 　 　 　 　 　 　 　 　 　 　 www.rohm.com 2/6 20160606 - Rev.002 © 2016 ROHM Co., Ltd. All rights reserved.

BC858B 　 　 　 Datasheet llElectrical characteristic curves(T = 25°C) a Fig.1 Ground Emitter Propagation Fig.2 Grounded Emitter Output 　　　　Characteristics 　　　　Characteristics Fig.3 DC Current Gain vs. Collector Fig.4 DC Current Gain vs. Collector 　　　　Current (I) 　　　　Current (lI) 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 www.rohm.com 3/6 20160606 - Rev.002 © 2015 ROHM Co., Ltd. All rights reserved.

BC858B 　 　 　 Datasheet llElectrical characteristic curves(T = 25°C) a Fig.5 Collector-Emitter Saturation Voltage Fig.6 Collector-Emitter Saturation Voltage 　　　　vs. Collector Current(l) 　　　　vs. Collector Current(ll) Fig.7 Base-Emitter Saturation Voltage Fig.8 Gain Bandwith Product vs. 　　　　vs. Collector Current (I) 　　　　 Emitter Current 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 www.rohm.com 4/6 20160606 - Rev.002 © 2016 ROHM Co., Ltd. All rights reserved.

BC858B 　 　 　 Datasheet llElectrical characteristic curves(T = 25°C) a Fig.9 Collector Output Capacitance vs. Fig.10 Safe Operating Area 　　　　　Collector-Base Voltage 　　　　　Emitter Input Capacitance vs. 　　　　　Emitter-Base Voltage 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 www.rohm.com 5/6 20160606 - Rev.002 © 2016 ROHM Co., Ltd. All rights reserved.

BC858B 　 　 　 Datasheet llDimensions 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 www.rohm.com 6/6 20160606 - Rev.002 © 2016 ROHM Co., Ltd. All rights reserved.

Notice Precaution on using ROHM Products 1. Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment, OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you intend to use our Products in devices requiring extremely high reliability (such as medical equipment (Note 1), transport equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance. Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific Applications. (Note1) Medical Equipment Classification of the Specific Applications JAPAN USA EU CHINA CLASSⅢ CLASSⅡb CLASSⅢ CLASSⅢ CLASSⅣ CLASSⅢ 2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which a failure or malfunction of our Products may cause. The following are examples of safety measures: [a] Installation of protection circuits or other protective devices to improve system safety [b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. Our Products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any special or extraordinary environments or conditions. If you intend to use our Products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents [b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust [c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2 [d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves [e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items [f] Sealing or coating our Products with resin or other coating materials [g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] Use of the Products in places subject to dew condensation 4. The Products are not subject to radiation-proof design. 5. Please verify and confirm characteristics of the final or mounted products in using the Products. 6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied, confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect product performance and reliability. 7. De-rate Power Dissipation depending on ambient temperature. When used in sealed area, confirm that it is the use in the range that does not exceed the maximum junction temperature. 8. Confirm that operation temperature is within the specified range described in the product specification. 9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in this document. Precaution for Mounting / Circuit board design 1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability. 2. In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products, please consult with the ROHM representative in advance. For details, please refer to ROHM Mounting specification Notice-PGA-E Rev.003 © 2015 ROHM Co., Ltd. All rights reserved.

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