DL4728A THRU DL4764A
Features
· 1.0W Power Dissipation
· 3.9V - 100V Nominal Zener Voltages
· Standard V
Z
Tolerance is 5%
1W SURFACE MOUNT
ZENER DIODES
MELF (DO-41)
SOLDERABLE ENDS
0.024(0.60)
0.018(0.46)
Mechanical Data
· Case : MELF(DO-41) glass
· Terminals : Solderable per MIL-STD-202, method 208
· Polarity : Cathode band
· Approx. Weight : 0.25 grams
0.205(5.20)
0.190(4.80)
0.105(2.70)
0.095(2.40)
Dimensions in inches and (millimeters)
Absolute Maximum Ratings (Limiting Values)
(T
A
=25℃)
Symbols
Value
P
d
/Vz
1
170
1.2
-65 to +200
Units
mA
W
K/W
V
℃
Zener current see table "Characteristics"
Power dissipation at T
A
=25℃ (Note 1)
Thermal resistance - Junction to ambient air (Note 1)
Forward voltage at I
F
=200 mA
Operating & storage temperature range
Iz
P
d
R
θJA
V
F
T
J,
T
STG
Notes :
(1) Valid provided that electrodes of the case ard kept at ambient temperature.
(2) Measured under thermal equilibrium and DC (I
ZT
) test conditions.
(3) The Zener impedance is derived from the 60Hz AC voltage which results when an AC current having an RMS value equal to 10%
of the Zener current (I
ZT
or I
ZK
) is superimposed on I
ZT
or I
ZK
. Zener impedance is measured at two points to insure a sharp knee
on the breakdown curve and to eliminate unstable units.
RATINGS AND CHARACTERISTIC CURVES DL4728A THRU DL4764A
1.0
0.8
P
d
, P OWER DISSIPAT ION ( W)
0.6
0.4
0.2
0
1
100
T
A
, AMBIENT TEMPERA TURE (°C)
Fig. 1, Power Derating Curve
200
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