MOTOROLA
SEMICONDUCTOR
TECHNICAL DATA
1 to 3 Watt DO-41 Surmetic 30
Zener Voltage Regulator Diodes
GENERAL DATA APPLICABLE TO ALL SERIES IN
THIS GROUP
GENERAL
DATA
1–3 WATT
DO-41
SURMETIC 30
1 TO 3 WATT
ZENER REGULATOR
DIODES
3.3–400 VOLTS
1 to 3 Watt Surmetic 30
Silicon Zener Diodes
. . . a complete series of 1 to 3 Watt Zener Diodes with limits and operating characteristics
that reflect the superior capabilities of silicon-oxide-passivated junctions. All this in an
axial-lead, transfer-molded plastic package offering protection in all common environmen-
tal conditions.
Specification Features:
•
Surge Rating of 98 Watts @ 1 ms
•
Maximum Limits Guaranteed On Up To Six Electrical Parameters
•
Package No Larger Than the Conventional 1 Watt Package
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:
0.4 gram (approx)
WAFER FAB LOCATION:
Phoenix, Arizona
ASSEMBLY/TEST LOCATION:
Seoul, Korea
MAXIMUM RATINGS
Rating
DC Power Dissipation @ TL = 75°C
Lead Length = 3/8″
Derate above 75°C
DC Power Dissipation @ TA = 50°C
Derate above 50°C
Operating and Storage Junction Temperature Range
5
PD , MAXIMUM DISSIPATION (WATTS)
L = 1/8″
4
L = 3/8″
3
L = LEAD LENGTH
TO HEAT SINK
Symbol
PD
CASE 59-03
DO-41
PLASTIC
Value
3
24
Unit
Watts
mW/°C
Watt
mW/°C
°C
PD
TJ, Tstg
1
6.67
– 65 to +200
2
L = 1″
1
0
0
20
40
60
80 100 120 140 160
TL, LEAD TEMPERATURE (°C)
180
200
Figure 1. Power Temperature Derating Curve
Motorola TVS/Zener Device Data
1–3 Watt DO-41 Surmetic 30 Data Sheet
6-43
GENERAL DATA — 1-3 WATT DO-41 SURMETIC 30
θ
JL (t, D) TRANSIENT THERMAL RESISTANCE
JUNCTION-TO-LEAD (
°
C/W)
30
20
10
7
5
3
2
1
0.7
0.5
D =0.5
0.2
0.1
0.05
0.02
0.01
D=0
0.0005
0.001
0.002
0.005
NOTE: BELOW 0.1 SECOND, THERMAL
RESPONSE CURVE IS APPLICABLE
TO ANY LEAD LENGTH (L).
0.01
0.02
0.05
t, TIME (SECONDS)
0.1
0.2
PPK
t2
DUTY CYCLE, D =t1/t2
t1
SINGLE PULSE
∆T
JL =
θ
JL (t)PPK
REPETITIVE PULSES
∆T
JL =
θ
JL (t,D)PPK
0.5
1
2
5
10
0.3
0.0001 0.0002
Figure 2. Typical Thermal Response L, Lead Length = 3/8 Inch
1K
PPK , PEAK SURGE POWER (WATTS)
500
300
200
100
50
30
20
10
0.1
0.2 0.3 0.5
1
2 3
5
10
PW, PULSE WIDTH (ms)
20 30 50
100
RECTANGULAR
NONREPETITIVE
WAVEFORM
TJ = 25°C PRIOR
TO INITIAL PULSE
3
2
1
0.5
0.2
0.1
0.05
0.02
0.01
0.005
0.002
0.001
0.0005
0.0003
TA = 125°C
IR , REVERSE LEAKAGE (µ Adc) @ VR
AS SPECIFIED IN ELEC. CHAR. TABLE
TA = 125°C
1
2
5
10
20
50 100
NOMINAL VZ (VOLTS)
200
400
1000
Figure 3. Maximum Surge Power
Figure 4. Typical Reverse Leakage
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 =
θ
LA PD + TA
θ
LA is the lead-to-ambient thermal resistance (°C/W) and
PD is the power dissipation. The value for
θ
LA will vary and
depends on the device mounting method.
θ
LA is generally
30–40°C/W for the various clips and tie points in common
use and for printed circuit board wiring.
The temperature of the lead can also be measured using a
thermocouple placed on the lead as close as possible to the tie
point. The thermal mass connected to the tie point is normally
large enough so that it will not significantly respond to heat
surges generated in the diode as a result of pulsed operation
once steady-state conditions are achieved. Using the mea-
sured value of TL, the junction temperature may be deter-
mined by:
TJ = TL +
∆T
JL
1–3 Watt DO-41 Surmetic 30 Data Sheet
6-44
∆T
JL is the increase in junction temperature above the lead
temperature and may be found from Figure 2 for a train of
power pulses (L = 3/8 inch) or from Figure 10 for dc power.
∆T
JL =
θ
JL 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
=
θ
VZ
∆T
J
θ
VZ, the zener voltage temperature coefficient, is found from
Figures 5 and 6.
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 2 should not be used to compute surge capa-
bility. Surge limitations are given in Figure 3. 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 3 be exceeded.
Motorola TVS/Zener Device Data
GENERAL DATA — 1-3 WATT DO-41 SURMETIC 30
TEMPERATURE COEFFICIENT RANGES
(90% of the Units are in the Ranges Indicated)
θ
VZ, TEMPERATURE COEFFICIENT (mV/
°
C) @ I ZT
10
8
6
4
2
0
–2
–4
3
4
5
6
7
8
9
10
VZ, ZENER VOLTAGE @ IZT (VOLTS)
11
12
RANGE
θ
VZ, TEMPERATURE COEFFICIENT (mV/
°
C) @ IZT
1000
500
200
100
50
20
10
10
20
50
100
200
400
VZ, ZENER VOLTAGE @ IZT (VOLTS)
1000
Figure 5. Units To 12 Volts
Figure 6. Units 10 To 400 Volts
ZENER VOLTAGE versus ZENER CURRENT
(Figures 7, 8 and 9)
100
50
30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
0
1
2
3
4
5
6
7
VZ, ZENER VOLTAGE (VOLTS)
8
9
10
100
50
30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
0
10
20
30
40
50
60
70
80
VZ, ZENER VOLTAGE (VOLTS)
90
100
IZ, ZENER CURRENT (mA)
Figure 7. VZ = 3.3 thru 10 Volts
θ
JL, JUNCTION-TO-LEAD THERMAL RESISTANCE (
°
C/W)
10
5
IZ , ZENER CURRENT (mA)
80
70
60
50
40
30
20
10
0
0
1/8
IZ , ZENER CURRENT (mA)
Figure 8. VZ = 12 thru 82 Volts
2
1
0.5
L
L
TL
PRIMARY PATH OF
CONDUCTION IS THROUGH
THE CATHODE LEAD
1/4
3/8
1/2
5/8
3/4
L, LEAD LENGTH TO HEAT SINK (INCH)
7/8
1
0.2
0.1
100
150
200
250
300
350
VZ, ZENER VOLTAGE (VOLTS)
400
Figure 9. VZ = 100 thru 400 Volts
Figure 10. Typical Thermal Resistance
Motorola TVS/Zener Device Data
1–3 Watt DO-41 Surmetic 30 Data Sheet
6-45
GENERAL DATA — 1-3 WATT DO-41 SURMETIC 30
*MAXIMUM RATINGS
Rating
DC Power Dissipation @ TL = 75°C, Lead Length = 3/8″
Derate above 75°C
Symbol
PD
Value
1.5
12
Unit
Watts
mW/°C
*ELECTRICAL CHARACTERISTICS
(TL = 30°C unless otherwise noted. VF = 1.5 Volts Max @ lF = 200 mAdc for all types.)
Motorola
Type
Number
(Note 1)
1N5913B
1N5914B
1N5915B
1N5916B
1N5917B
Nominal
Zener Voltage
VZ @ IZT
Volts
(Note 2 and 3)
3.3
3.6
3.9
4.3
4.7
Test
Current
IZT
mA
113.6
104.2
96.1
87.2
79.8
Max. Zener Impedance (Note 4)
ZZT @ IZT
Ohms
10
9
7.5
6
5
ZZK
Ohms
500
500
500
500
500
@
IZK
mA
1
1
1
1
1
Max. Reverse
Leakage Current
IR
µA
100
75
25
5
5
@ VR
Volts
1
1
1
1
1.5
Maximum DC
Zener
Current
IZM
mAdc
454
416
384
348
319
1N5918B
1N5919B
1N5920B
1N5921B
1N5922B
1N5923B
1N5924B
1N5925B
1N5926B
1N5927B
1N5928B
1N5929B
1N5930B
1N5931B
1N5932B
1N5933B
1N5934B
1N5935B
1N5936B
1N5937B
1N5938B
1N5939B
1N5940B
1N5941B
1N5942B
1N5943B
1N5944B
1N5945B
1N5946B
1N5947B
5.1
5.6
6.2
6.8
7.5
8.2
9.1
10
11
12
13
15
16
18
20
22
24
27
30
33
36
39
43
47
51
56
62
68
75
82
73.5
66.9
60.5
55.1
50
45.7
41.2
37.5
34.1
31.2
28.8
25
23.4
20.8
18.7
17
15.6
13.9
12.5
11.4
10.4
9.6
8.7
8
7.3
6.7
6
5.5
5
4.6
4
2
2
2.5
3
3.5
4
4.5
5.5
6.5
7
9
10
12
14
17.5
19
23
26
33
38
45
53
67
70
86
100
120
140
160
350
250
200
200
400
400
500
500
550
550
550
600
600
650
650
650
700
700
750
800
850
900
950
1000
1100
1300
1500
1700
2000
2500
1
1
1
1
0.5
0.5
0.5
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
5
5
5
5
5
5
5
5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
4
5.2
6
6.5
7
8
8.4
9.1
9.9
11.4
12.2
13.7
15.2
16.7
18.2
20.6
22.8
25.1
27.4
29.7
32.7
35.8
38.8
42.6
47.1
51.7
56
62.2
294
267
241
220
200
182
164
150
136
125
115
100
93
83
75
68
62
55
50
45
41
38
34
31
29
26
24
22
20
18
(continued)
*Indicates JEDEC Registered Data.
1–3 Watt DO-41 Surmetic 30 Data Sheet
6-46
Motorola TVS/Zener Device Data
GENERAL DATA — 1-3 WATT DO-41 SURMETIC 30
*ELECTRICAL CHARACTERISTICS — continued
(TL = 30°C unless otherwise noted. VF = 1.5 Volts Max @ lF = 200 mAdc for all
types.)
Nominal
Zener Voltage
VZ @ IZT
Volts
(Note 2 and 3)
91
100
110
120
130
150
160
180
200
Max. Reverse
Leakage Current
IR
µA
1
1
1
1
1
1
1
1
1
@ VR
Volts
69.2
76
83.6
91.2
98.8
114
121.6
136.8
152
Maximum DC
Zener
Current
IZM
mAdc
16
15
13
12
11
10
9
8
7
Motorola
Type
Number
(Note 1)
1N5948B
1N5949B
1N5950B
1N5951B
1N5952B
1N5953B
1N5954B
1N5955B
1N5956B
Test
Current
IZT
mA
4.1
3.7
3.4
3.1
2.9
2.5
2.3
2.1
1.9
Max. Zener Impedance (Note 4)
ZZT @ IZT
Ohms
200
250
300
380
450
600
700
900
1200
ZZK
Ohms
3000
3100
4000
4500
5000
6000
6500
7000
8000
@
IZK
mA
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
*Indicates JEDEC Registered Data.
NOTE 1. TOLERANCE AND VOLTAGE DESIGNATION
Tolerance designation — Device tolerances of
±5%
are indicated by a “B” suffix.
NOTE 2. SPECIAL SELECTIONS AVAILABLE INCLUDE:
Nominal zener voltages between those shown and
±1%
and
±2%
tight voltage tolerances.
Consult factory.
Motorola TVS/Zener Device Data
1–3 Watt DO-41 Surmetic 30 Data Sheet
6-47
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