Diodes-Incorporated-FMMT491AQTA

FMMT491A  

40V NPN SILICON PLANAR MEDIUM POWER TRANSISTOR IN SOT23  

Feature  

Mechanical Data  





Case: SOT23  





















BV

CEO

> 40V  

Case Material: Molded P

lastic, “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  

I

C

= 1A Continuous Collector Current  

I

CM

= 2A Peak Pulse Current  





R

CE(sat)

= 195mΩ for a

Low Equivalent On-Resistance  

500mW Power Dissipation  

h

FE

Characterised up to 2A for High Current Gain Hold Up  

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)  



Weight 0.008 grams (Approximate)  

SOT23 (Type DN)  

C

E

C

B

B

E

Top View  

Device Symbol  

Top View  

Pin-Out  

Ordering Information

(Notes 4 & 5)  

Part Number  

FMMT491ATA  

FMMT491ATC  

FMMT491AQTA  

FMMT491AQTC  

Compliance  

AEC-Q101  

AEC-Q101  

Automotive  

Automotive  

Marking  

Reel Size (inches)  

Tape Width (mm)  

Quantity Per Reel  

3,000  

41A  

41A  

41A  

41A  

7

13  

7

8

8

8

8

10,000  

3,000  

10,000  

13  

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 info

rmation 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. Automotive products are AEC-Q101 qualified and are PPAP capable. Automotive, AEC-Q101 and standard products are electrically and thermally  

the same, except where specified. For more information, please refer to

5. For packaging details, go to our website a

Marking Information  

41A = Product Type Marking Code  

491  

41A  

1 of 7  

December 2018  

© Diodes Incorporated  

FMMT491A  

Document number: DS33092 Rev. 5 – 2  

FMMT491A  

Maximum Ratings

(@T

A

= +25°C, unless otherwise specified.)  

Characteristic  

Collector-Base Voltage  

Collector-Emitter Voltage  

Emitter-Base Voltage  

Symbol  

V

CBO  

V

CEO  

V

EBO  

I

C  

Value  

40  

40  

7

Unit  

V

V

V

Continuous Collector Current  

Peak Pulse Current  

1

A

2

A

I

CM  

Base Current  

200  

mA  

I

B  

Thermal Characteristics

(@T

A

= +25°C, unless otherwise specified.)  

Characteristic  

Power Dissipation (Note 6)  

Symbol  

P

D  

R

  

Value  

500  

Unit  

mW  

Thermal Resistance, Junction to Ambient (Note 6)  

Thermal Resistance, Junction to Lead (Note 7)  

Operating and Storage Temperature Range  

250  



C/W

  



C/W

  



C  

JA  

197  

R

  

JL  

-55 to +150  

T

J,

T

STG  

ESD Ratings

(Note 8)  

Characteristic  

Electrostatic Discharge – Human Body Model  

Electrostatic Discharge – Machine Model  

Symbol  

ESD HBM  

ESD MM  

Value  

≥ 8,000  

≥ 400  

Unit  

V

V

JEDEC Class  

3B  

C

Notes:  

6. For a device surface mounted on 15mm X 15mm FR4 PCB with high coverage of single sided 1 oz copper, in still air conditions; the device is measured  

when operating in a steady-state condition.  

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

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

2 of 7  

December 2018  

© Diodes Incorporated  

FMMT491A  

Document number: DS33092 Rev. 5 – 2  

FMMT491A  

Thermal Characteristics and Derating Information  

1

0.6  

0.5  

0.4  

0.3  

0.2  

0.1  

0.0  

V

CE(sat)  

Limit  

15 x 15mm FR4 1oz Copper  

100m  

DC  

1s  

100ms  

10m  

10ms  

100µs  

1ms  

15 x 15mm FR4  

1oz Copper  

100

祍

 

100  

1m  

1

10  

0

20 40 60 80

 

100 120 140 160  

Temperature (

o

C)  

-V

CE

Collector-Emitter Voltage (V)  

Safe Operating Area  

Derating Curve  

240  

200  

160  

120  

80  

15 x 15mm FR4 1oz Copper  

15 x 15mm FR4 1oz Copper  

100  

10  

1

D=0.5  

D=0.2  

Single Pulse  

D=0.05  

D=0.1  

40  

0

0.1  

100μ

1m 10m

 

100m  

1

10  

100  

1k  

100μ

1m 10m

 

100m  

1

10  

100  

1k  

Pulse Width (s)  

Transient Thermal Impedance  

Pulse Width (s)  

Pulse Power Dissipation  

3 of 7  

December 2018  

© Diodes Incorporated  

FMMT491A  

Document number: DS33092 Rev. 5 – 2  

FMMT491A  

Electrical Characteristics

(@T

A

= +25°C, unless otherwise specified.)  

Characteristic  

Collector-Base Breakdown Voltage  

Collector-Emitter Breakdown Voltage (Note 9)  

Emitter-Base Breakdown Voltage  

Collector Cutoff Current  

Symbol  

BV

CBO  

BV

CEO  

BV

EBO  

I

CBO  

Min  

40  

40  

7

Typ  

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

Max  

—

Unit  

V

Test Condition  

I

C

= 100µA  

—

V

I

C

= 10mA  

—

V

I

E

= 100µA  

—

100  

100  

100  

—

nA  

nA  

nA  

V

CB

= 30V, V

CES

= 30V  

V

EB

= 5V  

Emitter Cutoff Current  

—

I

EBO  

Collector Emitter Cutoff Current  

—

I

CES  

V

CE

= 30V, V

CES

= 30V  

I

C

= 1mA, V

CE

= 5V  

I

C

= 500mA, V

CE

= 5V  

I

C

= 1A, V

CE

= 5V  

I

C

= 2A, V

CE

= 5V  

I

C

= 500mA, I

B

= 50mA  

I

C

= 1A, I

B

= 100mA  

I

C

= 1A, V

CE

= 5V  

I

C

= 1A, I

B

= 100mA  

V

CB

= 10V, f = 1MHz  

300  

300  

200  

35  

—

900  

—

Static Forward Current Transfer Ratio (Note 9)  

—

h

FE  

—

0.3  

0.5  

1.0  

1.1  

10  

Collector-Emitter Saturation Voltage (Note 9)  

V

V

CE(sat)  

—

Base-Emitter Turn-On Voltage (Note 9)  

Base-Emitter Saturation Voltage (Note 9)  

Output Capacitance  

—

V

V

V

BE(on)  

V

BE(sat)  

C

obo  

—

—

pF  

V

CE

= 10V, I

C

= 50mA,  

f = 100MHz  

Transition Frequency  

150  

—

—

MHz  

f

T  

Notes:  

9. Measured unde

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

.  

4 of 7  

December 2018  

© Diodes Incorporated  

FMMT491A  

Document number: DS33092 Rev. 5 – 2  

FMMT491A  

Typical Electrical Characteristics

(@T

A

= +25°C, unless otherwise specified.)  

5 of 7  

December 2018  

© Diodes Incorporated  

FMMT491A  

Document number: DS33092 Rev. 5 – 2  

FMMT491A  

Package Outline Dimensions  

Please see

r the latest version.  

SOT23 (Type DN)  

b

SOT23 (Type DN)  

Dim  

A

A1  

b

c

D

E

E1  

e

e1  

L

L1  

Min  

0.89  

0.01  

0.30  

0.08  

2.80  

2.10  

1.20  

Max  

1.12  

0.10  

0.51  

0.20  

3.04  

2.64  

1.40  

Typ  

1.00  

0.05  

0.45  

0.10  

3.00  

2.42  

1.37  

E

e

e1  

0.95 REF  

1.90 REF  

0.60  

D

E1  

0.25  

0.45  

0.30  

0.54  

L

0.62  

A

All Dimensions in mm  

c

A1  

L

Suggested Pad Layout  

Please see

r the latest version.  

SOT23 (Type DN)  

Y

Dimensions Value

 

(in mm)  

C

X

2.0  

0.8  

Y1  

C

X1  

Y

1.35  

0.9  

Y1  

2.9  

X

X1  

6 of 7  

December 2018  

© Diodes Incorporated  

FMMT491A  

Document number: DS33092 Rev. 5 – 2  

FMMT491A  

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 © 2018, Diodes Incorporated  

7 of 7  

December 2018  

© Diodes Incorporated  

FMMT491A  

Document number: DS33092 Rev. 5 – 2