BL
FEATURES
power rating.
GALAXY ELECTRICAL
ZENER DIODES
U1ZB6.8
- - -
U1ZB390
POWER DISSIPATION:
1.0 W
Silicon planar power zener diodes
For use in stabilizing and clipping curcuits with high
(DO-214AC)SMA
Standard
zener
voltage tolerance is ±10%. Add
suffix "A" for ±5% tolerance. Other
zener
voltage
and tolerances are available upon request.
MECHANICAL DATA
Case:DO-214AC
Terminals: Solderable per MIL-STD-202,
method
208
Polarity: Cathode
band
Marking: Type
number
Weight:
0.002 ounces, 0.064 gram
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
ambient temperature unless otherwise specified.
SYMBOL
Zener current (see
Table
"Characteristics")
VALUE
UNIT
Pow er dissipation at T
amb
=25
P
tot
T
J
T
s
1.0
1)
-40---+150
-40---+150
W
Junction temperature
Storage temperature
range
NOTES:
(1) Valid provided that leads at a distance of 10 mm from case are kept at ambient temperature.
www.galaxycn.com
Document Number 0284025
BL
GALAXY ELECTRICAL
1.
RATINGS AND CHARACTERISTIC CURVES
FIG.1 -- AT Y
Z
- V
Z
TEMPERATURE COEFFICIENT OF
MAXIMUM ALLOWABLE AMBIENT
)
32
U1ZB6.8
- - -
U1ZB390
FIG.2 -- T
A
MAX - P
TEMPERATURE TA MAX ( )
200
160
120
80
40
0
ZENER VOLTAGE AT (mV/
24
γ
Z
16
8
0
α
T
0
10
20
30
40
0.
2
.4
.6
.8
1
1.2
ZENER VOLTAGE VZ (V)
FIG.3 -- P
RSM
- tw
PEAK REVERSE POWER DISSIPATION
2000
RECTANGULAR
WAVEFORM
P
RSM
T
W
T
A
=25
℃
UPPER LIMIT
POWER DISSIPATION P (W)
FIG.4 -- R
θJA
- T
TRANSIENT THERMAL IMPEDANCE
200
100
50
30
10
5
3
1
.5
.3
.1
.001
.01
.1
1
10
100 10000
1000
500
300
RECOMMENDED
100
50
.1
.3
.5
1
3
5
10
PULSE WIDTH TW (ms)
R
θJA
( /W)
P
RSM
(W)
TIME T (S)
www.galaxycn.com
Document Number 0284025
BL
GALAXY ELECTRICAL
3.
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