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PDF 1N5338B Data sheet ( Hoja de datos )
| Número de pieza | 1N5338B | |
| Descripción | 5 WATT ZENER REGULATOR DIODES 3.3-200 VOLTS | |
| Fabricantes | Motorola Inc | |
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MOTOROLA
SEMICONDUCTOR
TECHNICAL DATA
5 Watt Surmetic 40
Silicon Zener Diodes
This is a complete series of 5 Watt Zener Diodes with tight limits and better operating
characteristics that reflect the superior capabilities of silicon-oxide-passivated junctions.
All this is in an axial-lead, transfer-molded plastic package that offers protection in all com-
mon environmental conditions.
Specification Features:
• Up to 180 Watt Surge Rating @ 8.3 ms
• Maximum Limits Guaranteed on Seven Electrical Parameters
Mechanical Characteristics:
CASE: Void-free, transfer-molded, thermosetting plastic
FINISH: All external surfaces are corrosion resistant and leads are readily solderable
POLARITY: Cathode indicated by color band. When operated in zener mode, cathode
will be positive with respect to anode
MOUNTING POSITION: Any
WEIGHT: 0.7 gram (approx)
WAFER FAB LOCATION: Phoenix, Arizona
ASSEMBLY/TEST LOCATION: Seoul, Korea
1N5333B
through
1N5388B
5 WATT
ZENER REGULATOR
DIODES
3.3–200 VOLTS
CASE 17
PLASTIC
MAXIMUM RATINGS
Rating
DC Power Dissipation @ TL = 75°C
Lead Length = 3/8″
Derate above 75°C
Operating and Storage Junction Temperature Range
Symbol
PD
TJ, Tstg
Value
5
40
– 65 to +200
Unit
Watts
mW/°C
°C
8
L = LEAD LENGTH
L = TO HEAT SINK
L = 1/8″
L = (SEE FIGURE 5)
6
L = 3/8″
4
L = 1″
2
0
0 20 40 60 80 100 120 140 160 180 200
TL, LEAD TEMPERATURE (°C)
Figure 1. Power Temperature Derating Curve
5 Watt Surmetic 40 Data Sheet
6-1
Motorola TVS/Zener Device Data
1 page  
1N5333B through 1N5388B
1000
T = 25°C
100 100
10 10
1
0.1
10 20 30 40 50 60 70 80
VZ, ZENER VOLTAGE (VOLTS)
Figure 9. Zener Voltage versus Zener Current
VZ = 11 thru 75 Volts
1
0.1
80 100 120 140 160 180 200 220
VZ, ZENER VOLTAGE (VOLTS)
Figure 10. Zener Voltage versus Zener Current
VZ = 82 thru 200 Volts
APPLICATION NOTE
Since the actual voltage available from a given zener diode
is temperature dependent, it is necessary to determine junc-
tion temperature under any set of operating conditions in order
to calculate its value. The following procedure is recom-
mended:
Lead Temperature, TL, should be determined from:
TL = θLA PD + TA
θLA is the lead-to-ambient thermal resistance and PD is the
power dissipation.
Junction Temperature, TJ, may be found from:
TJ = TL + ∆TJL
∆TJL is the increase in junction temperature above the lead
temperature and may be found from Figure 4 for a train of
power pulses or from Figure 5 for dc power.
∆TJL = θJL PD
For worst-case design, using expected limits of IZ, limits of
PD and the extremes of TJ (∆TJ) may be estimated. Changes
in voltage, VZ, can then be found from:
∆V = θVZ ∆TJ
θVZ, the zener voltage temperature coefficient, is found from
Figures 2 and 3.
Under high power-pulse operation, the zener voltage will
vary with time and may also be affected significantly by the
zener resistance. For best regulation, keep current excursions
as low as possible.
Data of Figure 4 should not be used to compute surge capa-
bility. Surge limitations are given in Figure 6. They are lower
than would be expected by considering only junction tempera-
ture, as current crowding effects cause temperatures to be ex-
tremely high in small spots resulting in device degradation
should the limits of Figure 6 be exceeded.
Devices listed in bold, italic are Motorola preferred devices.
Motorola TVS/Zener Device Data
5 Watt Surmetic 40 Data Sheet
6-5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet 1N5338B.PDF ] | |
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