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FEATURES
GALAXY ELECTRICAL
ZENER DIODES
1N5221B - - - 1N5279B
POWER DISSIPATION: 500 mW
DO-35(GLASS)
Silicon planar power zener diodes
Standard Zener voltage tolerance is ±5%. With a "B"
suffix. Other tolerances are available upon request.
MECHANICAL DATA
Case:DO-35, Glass Case
Terminals: Solderable per MIL-STD-202, Method 208
Polarity: Cathode Band
Marking: Type Number
Approx. Weight: 0.13 grams.
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25
ambient temperature unless otherwise specified.
Single phase,half wave,60 Hz,resistive or inductive load. For capacitive load,derate by 20%.
SYMBOL
Zener current (see Table "Characteristics")
VALUE
UNIT
Pow er dissipation at T
amb
=25
P
tot
T
J
T
s
500
1)
175
-55---+175
mW
Junction temperature
Storage temperature
range
SYMBOL
Thermal resistance junction to ambient
MIN
TYP
MAX
300
1)
1.2
UNIT
/W
R
θ
JA
V
F
Forw ard voltage at I
F
=200mA
V
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NOTES:
(1) Valid provided that leads at a distance of 10 mm from case are kept at ambient temperature.
Document Number 0284001
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GALAXY ELECTRICAL
1.