Diodes-Incorporated-BC858C-7-F

BC856A

–

BC858C  

PNP SMALL SIGNAL TRANSISTOR IN SOT23  

Features  

Mechanical Data  













Ideally Suited for Automatic Insertion  

Complementary NPN Types: BC846

–

BC848  

For Switching and AF Amplifier Applications  

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  

Halogen and Antimony Free. “Green” Device (Note 3)  

For automotive applications requiring specific change control  

(i.e.: parts qualified to AEC-Q100/101/200, PPAP capable, and  

manufactured in IATF 16949 certified facilities), please refer  

to the related automotive grade (Q-suffix) part. A listing can  

be found at  





Case: SOT23  

Case Material: Molded Plastic

, “Green”

Molding Compound.  

UL Flammability Classification Rating 94V-0  

Moisture Sensitivity: Level 1 per J-STD-020  

Terminals: Finish

–

Matte Tin Plated Leads, Solderable per  

MIL-STD-202, Method 208  







Weight: 0.008 grams (Approximate)  



This part is qualified to JEDEC standards (as references in  

AEC-Q) for High Reliability.  

SOT23  

C

B

E

Device Symbol  

Top View  

Top View  

Pin-Out  

Ordering Information

(Note 4)  

Reel Size  

(inches)  

Quantity  

per Reel  

Reel Size

 

Quantity  

(inches) per

 

Reel  

Product  

Compliance  

Marking  

Product  

Compliance Marking  

BC856A-7-F  

BC856B-7-F  

BC856B-13-F  

BC857A-7-F  

BC857B-7-F  

BC857B-13-F  

AEC-Q101  

AEC-Q101  

AEC-Q101  

AEC-Q101  

AEC-Q101  

AEC-Q101  

K3A  

K3B  

K3B  

K3A  

K3B  

K3B  

7

7

13  

7

7

13  

3,000  

3,000  

10,000  

3,000  

3,000  

BC857C-7-F  

BC857C-13-F  

BC858A-7-F  

BC858B-7-F  

BC858C-7-F  

AEC-Q101  

AEC-Q101  

AEC-Q101  

AEC-Q101  

AEC-Q101  

K3G  

K3G  

K3A  

K3B  

K3G  

7

13  

7

7

7

3,000  

10,000  

3,000  

3,000  

3,000  

10,000  

Notes:  

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.  

2. See

r more information about Diodes Incorporated’s definitions of Halogen

– and Antimony-free, “Green” and  

Lead-free.  

3. Halogen- and Antimony-

free “Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and  

<1000ppm antimony compounds.  

4. For packaging details, go to our website at

Marking Information  

xxx = Product Type Marking Code  

(Please see Ordering Information)  

YM = Date Code Marking  

xxx  

Y or Y = Year (ex: G = 2019)  

M or M = Month (ex: 9 = September)  

Date Code Key  

Year  

2019  

2020  

2021  

2022  

2023  

2024  

2025  

202

6  

Code  

G

H

I

J

K

L

M

N

Month  

Code  

Jan  

1

Feb  

2

Mar  

3

Apr  

4

May  

5

Jun  

6

Jul  

7

Aug  

8

Sep  

9

Oct  

O

Nov  

N

Dec  

D

1 of 7  

November 2019  

© Diodes Incorporated  

BC856A

–

BC858C  

Document number:

 

DS11207 Rev. 25 – 2  

BC856A

–

BC858C  

Absolute Maximum Ratings

(@T

A

= +25°C, unless otherwise specified.)  

Characteristic  

Symbol  

Value  

-80  

-50  

-30  

-65  

Unit  

BC856  

BC857  

BC858  

BC856  

BC857  

BC858  

Collector-Base Voltage  

V

V

CBO  

Collector-Emitter Voltage  

Emitter-Base Voltage  

-45  

-30  

V

V

CEO  

-5.0  

-100  

-200  

-200  

-200  

V

V

EBO  

I

C  

Continuous Collector Current  

Peak Collector Current  

Peak Emitter Current  

Peak Base Current  

mA  

mA  

mA  

mA  

I

CM  

I

EM  

I

BM  

Thermal Characteristics

(@T

A

= +25°C, unless otherwise specified.)  

Characteristic  

Symbol  

Value  

310  

350  

403  

357  

Unit  

(Note 5)  

(Note 6)  

(Note 5)  

(Note 6)  

(Note 7)  

Power Dissipation  

mW  

P

D  

Thermal Resistance, Junction to Ambient  

°C/W



 

°C/W

  

R

θ

JA  

Thermal Resistance, Junction to Leads  

350  

R

θ

JL  

Operating and Storage Temperature Range  

-65 to +150  

°C  

T

J,

T

STG  

ESD Ratings

(Note 8)  

Characteristic  

Electrostatic Discharge – Human Body Model  

Electrostatic Discharge – Machine Model  

Symbol  

ESD HBM  

ESD MM  

Value  

4,000  

400  

Unit  

V

V

JEDEC Class  

3A  

C

Notes:  

5. For a device mounted on minimum recommended pad layout 1oz copper that is on a single-sided FR-4 PCB; device is measured under still air  

conditions whilst operating in a steady-state.  

6. Same as Note 5, except the device is mounted on 15mm



15mm 1oz copper.  

7. Thermal resistance from junction to solder-point (at the end of the leads).  

8. Refer to JEDEC specification JESD22-A114 and JESD22-A115.  

2 of 7  

November 2019  

© Diodes Incorporated  

BC856A

–

BC858C  

Document number:

 

DS11207 Rev. 25 – 2  

BC856A

–

BC858C  

Thermal Characteristics and Derating Information  

0.4  

0.3  

0.2  

0.1  

0.0  

400  

350  

300  

250  

200  

150  

100  

50  

D=0.5  

D=0.2  

D=0.1  

Single Pulse  

D=0.05  

10  

0

µ

0

25  

50  

75  

100 125 150  

100µ 1m

 

10m 100m  

1

100  

1k  

Temperature (°C)  

Temperature (°C)  

Pulse Width (s)  

Transient Thermal Impedance  

Derating Curve  

10  

Single Pulse.

T =25°C  

T

A

= 25°C  

amb  

1

0.1  

10m  

100m  

1

10  

100  

1k  

Pulse Width (s)  

Pulse Power Dissipation  

3 of 7  

November 2019  

© Diodes Incorporated  

BC856A

–

BC858C  

Document number:

 

DS11207 Rev. 25 – 2  

BC856A

–

BC858C  

Electrical Characteristics

(@T

A

= +25°C, unless otherwise specified.)  

Characteristic  

Symbol  

Min  

-80  

-50  

-30  

-65  

-45  

-30  

-5  

Typ  

Max  

Unit  

Test Condition  

I

C

= -10µA  

BC856  

BC857  

BC858  

BC856  

BC857  

BC858  

Collector-Base Breakdown Voltage  

—

—

V

V

BV

CBO  

Collector-Emitter Breakdown Voltage  

(Note 9)  

—

—

BV

CEO  

I

C

= -10mA  

Emitter-Base Breakdown Voltage  

Collector Cutoff Current  

—

—

—

-15  

-4  

V

BV

EBO  

I

CBO  

I

E

= -1µA  

nA  

µA  

V

CB

= -30V  

—

V

CB

= -30V, T

J

= +150°C  

V

CE

= -80V  

BC856  

BC857  

BC858  

-15  

-15  

-15  

-100  

Collector Emitter Cutoff Current  

Emitter-Base Cutoff Current  

—

—

nA  

I

CES  

V

CE

= -50V  

V

CE

= -30V  

—

—

—

200  

330  

600  

2.7  

4.5  

8.7  

18  

30  

nA  

I

EBO  

h

fe  

V

EB

= -5V  

BC856A / BC857A / BC858A  

BC856B / BC857B / BC858B  

BC857C / BC858C  

Small Signal Current Gain  

—

—

—

—

—

BC856A / BC857A / BC858A  

BC856B / BC857B / BC858B  

BC857C / BC858C  

BC856A / BC857A / BC858A  

BC856B / BC857B / BC858B  

BC857C / BC858C  

Input Impedance  

—

—

—

kΩ  

µS  

—

h

ie  

h

oe  

h

re  

I

C

= -2.0mA, V

CE

= -5V  

f = 1.0kHz  

Output Admittance  

60  

BC856A / BC857A / BC858A  

BC856B / BC857B / BC858B  

BC857C / BC858C  

1.5×10

-4  

2×10

-4  

3×10

-4  

180  

290  

520  

-75  

Reverse Voltage Transfer  

Ratio  

BC856A / BC857A / BC858A  

BC856B / BC857B / BC858B  

BC857C / BC858C  

125  

220  

420  

250  

475  

800  

-300  

-650  

-750  

-820  

DC Current Gain (Note 9)  

—

h

FE  

I

C

= -2.0mA, V

CE

= -5V  

I

C

= -10mA, I

B

= -0.5mA  

I

C

= -100mA, I

B

= -5.0mA  

I

C

= -2mA, V

CE

= -5V  

Collector-Emitter Saturation Voltage (Note 9)  

Base-Emitter Turn-On Voltage (Note 9)  

—

mV  

mV  

V

CE(sat)  

V

BE(on)  

-250  

-600  

-650  

—

—

I

C

= -10mA, V

CE

= -5V  

I

C

= -10mA, I

B

= -0.5mA  

I

C

= -100mA, I

B

= -5mA  

V

CB

= -10V, f = 1.0MHz  

-700  

-850  

3

—

-1100  

—

Base-Emitter Saturation Voltage (Note 9)  

Output Capacitance  

—

—

mV  

pF  

V

BE(sat)  

C

obo  

f

T  

V

CE

= -5V, I

C

= -10mA,  

f = 100MHz  

Transition Frequency  

100  

200  

—

MHz  

V

CE

= -5V, I

C

= -200µA  

R

S

= 2k

Ω

, f = 1kHz  

∆

f = 200Hz  

Noise Figure  

NF  

—

2

10  

dB  

Note:  

9

. Measured under pulsed conditions. Pulse width ≤ 300µs. Duty cycle ≤ 2%

.  

4 of 7  

November 2019  

© Diodes Incorporated  

BC856A

–

BC858C  

Document number:

 

DS11207 Rev. 25 – 2  

BC856A

–

BC858C  

Typical Electrical Characteristics (BC856B)

(@T

A

= +25°C, unless otherwise specified.)  

1,000  

0.5  

0.4  

T

= 150  

癈

T

A

= 150°C  

A

V

= 5V  

CE  

I

I

C

B

= 10  

100  

T

= 25

癈  

= 25°C  

T

0.3  

0.2  

T

= -50  

癈

T

A

= -50°C  

A

T

= 25

癈

 

= 25°C  

T

T

= 150  

癈

T

A

A

= 150°C  

10  

0.1  

0

T

= -50  

癈

T

A

= -50°C  

A

1

1,000  

0.1  

10  

100  

1

10  

I

C

, COLLECTOR CURRENT (mA)  

Figure 1 Typical DC Current Gain vs. Collector Current  

100  

1

1,000  

I

C

, COLLECTOR CURRENT (mA)  

Figure 2 Typical Collector-Emitter Saturation Voltage  

vs. Collector Current  

1,000  

V

= 5V  

CE  

100  

10  

1

100  

10  

I

C

, COLLECTOR CURRENT (mA)  

Figure 3 Gain-Bandwidth Product vs Collector Current  

5 of 7  

November 2019  

© Diodes Incorporated  

BC856A

–

BC858C  

Document number:

 

DS11207 Rev. 25 – 2  

BC856A

–

BC858C  

Package Outline Dimensions  

Please see

r the latest version.  

SOT23  

All 7°  

H

GAUGE PLANE  

SOT23  

0.25  

Dim  

A

B

C

D

F

G

H

Min  

0.37  

1.20  

2.30  

0.89  

0.45  

1.78  

2.80  

Max  

0.51  

1.40  

2.50  

1.03 0.915  

0.60 0.535  

Typ  

0.40  

1.30  

2.40  

J

K

K1  

a

M

A

L

L1  

2.05  

3.00  

1.83  

2.90  

0.05  

J

0.013 0.10  

K

K1  

L

L1  

M

a

0.890 1.00 0.975  

0.903 1.10 1.025  

C

B

0.45  

0.25  

0.61  

0.55  

0.55  

0.40  

0.085 0.150 0.110  

0° 8°

 

—  

D

G

F

All Dimensions in mm  

Suggested Pad Layout  

Please see

r the latest version.  

SOT23  

Y

Dimensions Value

 

(in mm)  

C

X

X1  

Y

2.0  

0.8  

1.35  

0.9  

Y1  

C

Y1  

2.9  

X

X1  

6 of 7  

November 2019  

© Diodes Incorporated  

BC856A

–

BC858C  

Document number:

 

DS11207 Rev. 25 – 2  

BC856A

–

BC858C  

IMPORTANT NOTICE  

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,  

INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE  

(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).  

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without  

further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or  

use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights,  

nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use  

and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against  

all damages.  

Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.  

Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and  

hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or  

indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.  

Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings  

noted herein may also be covered by one or more United States, international or foreign trademarks.  

This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final  

and determinative format released by Diodes Incorporated.  

LIFE SUPPORT  

Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express  

written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:  

A. Life

 

support devices or systems are devices or systems which:  

1. are intended to implant into the body, or  

2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the  

labeling can be reasonably expected to result in significant injury to the user.  

B. A

 

critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the  

failure of the life support device or to affect its safety or effectiveness.  

Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and  

acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any  

use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related  

information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its  

representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.  

Copyright © 2019, Diodes Incorporated  

7 of 7  

November 2019  

© Diodes Incorporated  

BC856A

–

BC858C  

Document number:

 

DS11207 Rev. 25 – 2