Motorola 3EZ43D5, 3EZ400D5, 3EZ39D5, 3EZ36D5, 3EZ170D5 Datasheet

MOTOROLA

SEMICONDUCTOR

TECHNICAL DATA

Motorola TVS/Zener Device Data

6-43

1–3 Watt DO-41 Surmetic 30 Data Sheet

1 to 3 Watt DO-41 Surmetic 30
Zener Voltage Regulator Diodes

GENERAL DATA APPLICABLE TO ALL SERIES IN
THIS GROUP

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 environmen­tal 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 Symbol Value Unit

DC Power Dissipation @ TL = 75°C

Lead Length = 3/8″
Derate above 75°C

P

D

3

24

Watts

mW/°C

DC Power Dissipation @ TA = 50°C

Derate above 50°C

P

D

1

6.67

Watt

mW/°C

Operating and Storage Junction Temperature Range TJ, T

stg

– 65 to +200 °C

GENERAL

DATA

CASE 59-03

DO-41

PLASTIC

1–3 WATT

DO-41

SURMETIC 30

1 TO 3 WATT

ZENER REGULATOR

DIODES

3.3–400 VOLTS

Figure 1. Power Temperature Derating Curve

TL, LEAD TEMPERATURE (°C)

P , MAXIMUM DISSIPATION (WATTS)

D

0 20 40 60 20080 100 120 140 160 180

0

1

2

3

4

5

L = 1/8

″

L = 3/8

″

L = 1

″

L = LEAD LENGTH
TO HEAT SINK

GENERAL DATA — 1-3 WATT DO-41 SURMETIC 30

Motorola TVS/Zener Device Data

6-44

1–3 Watt DO-41 Surmetic 30 Data Sheet

t, TIME (SECONDS)

0.0001 0.0002 0.0005 0.001 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10

0.3

0.5

0.7

1

2

3

5

7

10

20

30

D =0.5

0.2

0.1

0.05

0.01

D = 0

DUTY CYCLE, D =t1/t

2

θ

JL

(t, D) TRANSIENT THERMAL RESISTANCE

JUNCTION-TO-LEAD ( C/W)

°

P

PK

t

1

NOTE: BELOW 0.1 SECOND, THERMAL

RESPONSE CURVE IS APPLICABLE

TO ANY LEAD LENGTH (L).

SINGLE PULSE ∆TJL =

θ

JL

(t)P

PK

REPETITIVE PULSES

∆

TJL =

θ

JL

(t,D)P

PK

t

2

0.02

10

20

30

50

100

200

300

500

1K

0.1 0.2 0.3 0.5 1 2 3 5 10 20 30 50 100
PW, PULSE WIDTH (ms)

P , PEAK SURGE POWER (WATTS)

PK

1 2 5 10 20 50 100 200 400 1000

0.0003

0.0005

0.001

0.002

0.005

0.01

0.02

0.05

0.1

0.2

0.5

1

2

3

TA = 125°C

TA = 125°C

NOMINAL VZ (VOLTS)

AS SPECIFIED IN ELEC. CHAR. TABLE

Figure 2. Typical Thermal Response L, Lead Length = 3/8 Inch

Figure 3. Maximum Surge Power Figure 4. Typical Reverse Leakage

I

R

, REVERSE LEAKAGE (

µ

Adc) @ V

R

RECTANGULAR
NONREPETITIVE
WAVEFORM

TJ= 25

°

C PRIOR

TO INITIAL PULSE

APPLICATION NOTE

Since the actual voltage available from a given zener diode
is temperature dependent, it is necessary to determine junc­tion temperature under any set of operating conditions in order
to calculate its value. The following procedure is recom­mended:

Lead Temperature, TL, should be determined from:

TL = θLA PD + T

A

θLA is the lead-to-ambient thermal resistance (°C/W) and

PD is the power dissipation. The value for θLA will vary and

depends on the device mounting method. θLA 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 mea­sured value of TL, the junction temperature may be deter­mined by:

TJ = TL + ∆T

JL

∆TJL 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.

∆TJL = θJL P

D

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 ∆T

J

θVZ, 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 capa­bility. Surge limitations are given in Figure 3. They are lower
than would be expected by considering only junction tempera­ture, as current crowding effects cause temperatures to be ex­tremely high in small spots resulting in device degradation
should the limits of Figure 3 be exceeded.

GENERAL DATA — 1-3 WATT DO-41 SURMETIC 30

Motorola TVS/Zener Device Data

6-45

1–3 Watt DO-41 Surmetic 30 Data Sheet

Figure 5. Units To 12 Volts Figure 6. Units 10 To 400 Volts

Figure 7. VZ = 3.3 thru 10 Volts Figure 8. VZ = 12 thru 82 Volts

Figure 9. VZ = 100 thru 400 Volts Figure 10. Typical Thermal Resistance

ZENER VOLTAGE versus ZENER CURRENT

(Figures 7, 8 and 9)

TEMPERATURE COEFFICIENT RANGES

(90% of the Units are in the Ranges Indicated)

VZ, ZENER VOLTAGE @ IZT (VOLTS)

3 4 5 6 7 8 9 10 11 12

10

8
6

4

2
0

–2

–4

RANGE

, TEMPERATURE COEFFICIENT (mV/ C) @ I

ZTVZ

°

θ

1000

500

200

100

50

20

10

10 20 50 100 200 400 1000

VZ, ZENER VOLTAGE @ IZT (VOLTS)

, TEMPERATURE COEFFICIENT (mV/ C) @ I

ZTVZ

°θ

0 1 2 3 4 5 6 7 8 9 10

100

50
30

20
10

1

0.5

0.3

0.2

0.1
VZ, ZENER VOLTAGE (VOLTS)

I , ZENER CURRENT (mA)

Z

2

5
3

0 10 20 30 40 50 60 70 80 90 100

VZ, ZENER VOLTAGE (VOLTS)

I , ZENER CURRENT (mA)

Z

100

50
30

20
10

1

0.5

0.3

0.2

0.1

2

5
3

100 200 300 400250 350150

10

1

0.5

0.2

0.1
VZ, ZENER VOLTAGE (VOLTS)

2

5

I , ZENER CURRENT (mA)

Z

0

10

20

30

40

50

60

70

80

L, LEAD LENGTH TO HEAT SINK (INCH)

PRIMARY PATH OF

CONDUCTION IS THROUGH

THE CATHODE LEAD

0 1/8 1/4 3/8 1/2 5/8 3/4 7/8 1

T

L

JL

, JUNCTION-TO-LEAD THERMAL RESISTANCE

θ

LL

( C/W)

°