
FMMT491A
Document number: DS33092 Rev. 4 - 2
2 of 7
www.diodes.com
October 2012
© Diodes Incorporated
FMMT491A
Product Line o
Diodes Incorporated
Maximum Ratings (@T
A
= +25°C, unless otherwise specified.)
Characteristic Symbol Value Unit
Collector-Base Voltage
V
CBO
40 V
Collector-Emitter Voltage
V
CEO
40 V
Emitter-Base Voltage
V
EBO
7 V
Continuous Collector Current
I
C
1 A
Peak Pulse Current
I
CM
2 A
Base Current
I
B
200 mA
Thermal Characteristics (@T
A
= +25°C, unless otherwise specified.)
Characteristic Symbol Value Unit
Power Dissipation (Note 6)
P
D
500 mW
Thermal Resistance, Junction to Ambient (Note 6)
R
JA
250
°C/W
Thermal Resistance, Junction to Lead (Note 7)
R
JL
197
°C/W
Operating and Storage Temperature Range
T
J,
T
STG
-55 to +150
°C
ESD Ratings (Note 8)
Characteristic Symbol Value Unit JEDEC Class
Electrostatic Discharge - Human Body Model ESD HBM ≥ 8,000 V 3B
Electrostatic Discharge - Machine Model ESD MM ≥ 400 V 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.
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