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1N4149 Small Signal Diode
December 2004
1N4149
Small Signal Diode
DO-35
Color Band Denotes Cathode
Absolute Maximum Ratings *
T
Symbol
V
RRM
I
F(AV)
I
FSM
a
= 25°C unless otherwise noted
Parameter
Maximum Repetitive Reverse Voltage
Average Rectified Forward Current
Non-repetitive Peak Forward Surge Current
Pulse Width = 1.0 second
Pulse Width = 1.0 microsecond
Storage Temperature Range
Operating Junction Temperature
Value
100
500
1.0
4.0
-65 to +200
175
Unit
V
mA
A
A
°C
°C
T
STG
T
J
* These ratings are limiting values above which the serviceability of the diode may be impaired.
NOTES:
1) These ratings are based on a maximum junction temperature of 200 degrees C.
2) These are steady limits. The factory should be consulted on applications involving pulsed or low duty cycle operations.
Thermal Characteristics
Symbol
P
D
R
θJA
Power Dissipation
Thermal Resistance, Junction to Ambient
T
C
= 25°C unless otherwise noted
Parameter
Value
500
300
Unit
mW
°C/W
Electrical Characteristics
Symbol
V
R
V
F
I
R
C
T
t
rr
Breakdown Voltage
Forward Voltage
Reverse Leakage
Total Capacitance
Parameter
I
R
= 5µA
I
R
= 100µA
I
F
= 10mA
Conditions
Min.
75
100
Max
Units
V
V
1.0
25
50
2
4
V
nA
µA
pF
ns
V
R
= 20V
V
R
= 20V, T
A
= 150°C
V
R
= 0, f = 1.0MHz
I
F
= 10mA, V
R
= 6.0V
R
L
= 100Ω, I
rr
= 1mA
Reverse Recovery Time
©2004 Fairchild Semiconductor Corporation
1
www.fairchildsemi.com
1N4149 Rev. A
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As used herein:
2. A critical component is any component of a life
1. Life support devices or systems are devices or
support device or system whose failure to perform can
systems which, (a) are intended for surgical implant into
be reasonably expected to cause the failure of the life
the body, or (b) support or sustain life, or (c) whose
support device or system, or to affect its safety or
failure to perform when properly used in accordance
with instructions for use provided in the labeling, can be
effectiveness.
reasonably expected to result in significant injury to the
user.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Advance Information
Product Status
Formative or
In Design
Definition
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
Preliminary
First Production
No Identification Needed
Full Production
Obsolete
Not In Production
This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
Rev. I14
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