Diodes-Incorporated-AC857CQ-7

AC857BQ-AC857CQ  

PNP SMALL SIGNAL TRANSISTOR IN SOT23  

Description  

Mechanical Data  





Case: SOT23  

The AC857BQ-AC857CQ Bipolar Junction Transistors (BJT) are  

designed to meet the stringent requirements of Automotive  

Applications.  

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  





Features  



Weight: 0.008 grams (Approximate)  















Ideally Suited for Automatic Insertion  

Complementary NPN Types: AC847BQ-AC847CQ  

For Switching and AF Amplifier Applications  

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

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

Qualified to AEC-Q101 Standards for High Reliability  

PPAP Capable (Note 4)  

C

SOT23  

C

E

B

B

E

Top View  

Device Symbol  

Top View  

Pin-Out  

Ordering Information

(Notes 4 & 5)  

Product  

Compliance  

Marking  

Reel Size (inches)  

Quantity per Reel  

AC857BQ-7  

AC857CQ-7  

Automotive  

Automotive  

2C6  

2C7  

7

7

3,000  

3,000  

Notes:  

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

for more information about Diodes Incorporated’s definitions of Hal

ogen- 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. Automotive products are AEC-Q101 qualified and are PPAP capable. Refer to

Marking Information  

SOT23  

XXX = Product Type Marking Code  

YM = Date Code Marking  

Y or Y = Year (ex: E = 2017)  

XXX  

M or M = Month (ex: 9 = September)  

Date Code Key  

Year  

2016  

2017  

2018  

2019  

2020  

2021  

2022  

2023  

Code  

D

E

F

G

H

I

J

K

Aug  

Sep  

Oct  

Nov  

Dec  

Month  

Code  

Jan  

Feb  

Mar  

Apr  

May  

Jun  

Jul  

8

9

O

N

D

1

2

3

4

5

6

7

1 of 7  

April 2017  

© Diodes Incorporated  

AC857BQ-AC857CQ  

Document Number:

 

DS39359 Rev. 3 – 2  

AC857BQ-AC857CQ  

Absolute Maximum Ratings

(@T

A

= +25°C, unless otherwise specified.)  

Characteristic  

Symbol  

V

CBO  

V

CEO  

V

EBO  

I

C  

Value  

-50  

-45  

Unit  

V

Collector-Base Voltage  

Collector-Emitter Voltage  

Emitter-Base Voltage  

V

-5.0  

-100  

-200  

-200  

-200  

V

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 6)  

(Note 7)  

(Note 6)  

(Note 7)  

(Note 8)  

Power Dissipation  

mW  

P

D  

Thermal Resistance, Junction to Ambient  

°C/W



 

R

θ

JA  

Thermal Resistance, Junction to Leads  

350  

°C/W

  

R

θ

JL  

Operating and Storage Temperature Range  

-65 to +150  

°C  

T

J,

T

STG  

ESD Ratings

(Note 9)  

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:  

6. 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.  

7. Same as Note 6, except the device is mounted on 15mm x 15mm 1oz copper.  

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

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

2 of 7  

April 2017  

© Diodes Incorporated  

AC857BQ-AC857CQ  

Document Number:

 

DS39359 Rev. 3 – 2  

AC857BQ-AC857CQ  

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  

0

0

25  

50  

75  

100 125 150  

1

00μ

1m 10m

 

100m  

1

10  

100  

1k  

100µ  

Temperature (

o

C)  

Pulse Width (s)  

Transient Thermal Impedance  

Derating Curve  

10  

Single Pulse. T

A

=25

o

C  

1

0.1  

10m  

100m  

1

10  

100  

1k  

Pulse Width (s)  

Pulse Power Dissipation  

3 of 7  

April 2017  

© Diodes Incorporated  

AC857BQ-AC857CQ  

Document Number:

 

DS39359 Rev. 3 – 2  

AC857BQ-AC857CQ  

Electrical Characteristics

(@T

A

= +25°C, unless otherwise specified.)  

Characteristic  

Collector-Base Breakdown Voltage  

Symbol  

BV

CBO  

BV

CEO  

BV

EBO  

Min  

-50  

-45  

-5  

Typ  

—

Max  

—

Unit  

V

Test Condition  

I

C

= -10µA  

Collector-Emitter Breakdown Voltage (Note 10)  

Emitter-Base Breakdown Voltage  

—

—

V

I

C

= -10mA  

—

—

V

I

E

= -1µA  

-15  

-4  

nA  

µA  

nA  

nA  

V

CB

= -30V  

Collector Cutoff Current  

—

—

I

CBO  

V

CB

= -30V, T

J

= +150°C  

V

CE

= -50V  

Collector Emitter Cutoff Current  

Emitter-Base Cutoff Current  

—

—

—

—

—

—

—

—

—

—

—

330  

600  

4.5  

8.7  

30  

60  

-15  

-100  

—

—

—

—

—

—

—

I

CES  

I

EBO  

V

EB

= -5V  

AC857BQ  

AC857CQ  

AC857BQ  

AC857CQ  

AC857BQ  

AC857CQ  

AC857BQ  

AC857CQ  

AC857BQ  

AC857CQ  

Small Signal Current Gain (Note 10)  

Input Impedance (Note 10)  

—

kΩ  

µS  

—

h

fe  

h

ie  

I

C

= -2.0mA, V

CE

= -5V  

f = 1.0kHz  

Output Admittance (Note 10)  

h

oe  

2×10

-4  

3×10

-4  

290  

520  

-75  

Reverse Voltage Transfer Ratio (Note 10)  

DC Current Gain (Note 10)  

h

re  

—

220  

420  

—

475  

800  

-300  

-650  

—

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 10)  

—

mV  

V

CE(SAT)  

-250  

-600  

-650  

—

-750  

-820  

—

Base-Emitter Turn-On Voltage (Note 10)  

mV  

V

BE(  

ON)  

—

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

Base-Emitter Saturation Voltage (Note 10)  

Output Capacitance  

—

—

mV  

pF  

V

BE(SAT)  

C

obo  

f

T  

-1100  

—

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:  

10

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

.  

4 of 7  

April 2017  

© Diodes Incorporated  

AC857BQ-AC857CQ  

Document Number:

 

DS39359 Rev. 3 – 2  

AC857BQ-AC857CQ  

Typical Electrical Characteristics

(@T

A

= +25°C, unless otherwise specified.)  

1,000  

0.5  

T

= 150°C  

A

V

= 5V  

CE  

I

C

= 10  

I

B

R

E

T

T

0.4  

)

V

N

(

I

I

E

M

A

G

G

E

A

100  

–

T

R T  

T

= 25°C  

N

E

R

R

U

C

A

L

O

T

0.3  

0.2  

O

T

= -50°C  

V

C

A

E

L

L

N

O

I

O T  

T

= 25°C  

C

A

A

C

D

R

,

T

= 150°C  

)

U

A

,

T

E

10  

A

h

F  

A

(

E

S

V

C  

0.1  

0

T

= -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  

April 2017  

© Diodes Incorporated  

AC857BQ-AC857CQ  

Document Number:

 

DS39359 Rev. 3 – 2  

AC857BQ-AC857CQ  

Package Outline Dimensions  

SOT23  

All 7°  

H

SOT23  

GAUGE PLANE  

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  

0.25  

J

K

K1  

a

M

A

2.05  

3.00  

1.83  

2.90  

0.05  

L

L1  

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

All Dimensions in mm  

G

F

Suggested Pad Layout  

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  

April 2017  

© Diodes Incorporated  

AC857BQ-AC857CQ  

Document Number:

 

DS39359 Rev. 3 – 2  

AC857BQ-AC857CQ  

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 © 2017, Diodes Incorporated  

7 of 7  

April 2017  

© Diodes Incorporated  

AC857BQ-AC857CQ  

Document Number:

 

DS39359 Rev. 3 – 2  

Mouser Electronics  

Authorized Distributor  

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