MOTOROLA
SEMICONDUCTOR
TECHNICAL DATA
Motorola TVS/Zener Device Data
6-1
5 Watt Surmetic 40 Data Sheet
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
MAXIMUM RATINGS
Rating Symbol Value Unit
DC Power Dissipation @ T
L
= 75°C
Lead Length = 3/8″
Derate above 75°C
P
D
5
40
Watts
mW/°C
Operating and Storage Junction Temperature Range T
J
, T
stg
– 65 to +200 °C
Figure 1. Power Temperature Derating Curve
T
L
, LEAD TEMPERATURE (
°
C)
P
D
, MAXIMUM POWER DISSIPATION (WATTS)
8
6
4
2
0
0 20 40 60 80 100 120 140 160 180 200
L = LEAD LENGTH
L = TO HEAT SINK
L = (SEE FIGURE 5)
L = 1/8
″
L = 3/8
″
L = 1
″
1N5333B
through
1N5388B
CASE 17
PLASTIC
5 WATT
ZENER REGULATOR
DIODES
3.3–200 VOLTS