BL
GALAXY ELECTRICAL
ZENER DIODES
FEATURES
Silicon planar power zener diodes
The
zener
voltages are graded according to the
international E 24 standard. Standard
zener
voltage
tolerance is ±5%. Replace suffix "C" with "B" for ±2%,
other voltage tolerance and other
zener
voltage are
available upon request.
BZX55 --- SERIES
POWER DISSIPATION: 500 mW
DO-34(GLASS)
MECHANICAL DATA
Case:DO-35, Glass Case
Terminals: Solderable per MIL-STD-202,
method
208
Polarity: Cathode
band
Marking: Type
number
Approx. Weight: 0.013 grams.
DO-35(GLASS)
MAXIMUM RATINGS AND
ELECTRICAL CHARACTERISTICS
Ratings at 25
ambient temperature unless otherwise specified.
SYMBOL
Zener current (see
Table
"Characteristics")
Pow er dissipation @ T
amb
=25
Junction temperature
Storage temperature
range
VALUE
UNIT
P
tot
T
J
T
s
500
1)
175
-55---+175
mW
SYMBOL
Thermal resistance junction to ambient
Forw ard voltage at I
F
=100mA
MIN
TYP
MAX
300
1)
1.0
UNIT
/W
V
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R
θ
JA
V
F
NOTES:
(1) Valid provided that leads at a distance of 10 mm from case are kept at ambient temperature.
Document Number 0284002
BL
GALAXY ELECTRICAL
1.
RATINGS AND CHARACTERISTIC CURVES
FIG.2 -- BREAKDOWN CHARACTERISTICS
BZX55 --- SERIES
mA
30
T
J
=25
0
C
C10
C12
C15
20
BZX55...
I
Z
C18
C22
C27
C33
10
Test current Iz
5mA
0
0
10
20
30
40 V
v
Z
FIG.3 -- ADMISSIBLE POWER DISSIPATION VERSUS AMBIENT TEMPERATURE
mW
500
400
P
tot
300
200
100
0
0
100
T
amb
200℃
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Document Number 0284002
BL
GALAXY ELECTRICAL
4.
PCB Design
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