ON Semiconductor MMSZ4678ET1 Technical data

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MMSZ4678ET1 Series

Zener Voltage Regulators

500 mW SOD−123 Surface Mount

Three complete series of Zener diodes are offered in the convenient,
surface mount plastic SOD−123 package. These devices provide a
convenient alternative to the leadless 34−package style.

Features

• 500 mW Rating on FR−4 or FR−5 Board

• Wide Zener Reverse Voltage Range − 1.8 V to 43 V

• Package Designed for Optimal Automated Board Assembly

• Small Package Size for High Density Applications

• ESD Rating of Class 3 (>16 kV) per Human Body Model

• Peak Power − 225 W (8 x 20 ms)

• Pb−Free Packages are Available

Mechanical Characteristics:

Void-free, transfer-molded, thermosetting plastic case

CASE:
FINISH: Corrosion resistant finish, easily solderable
MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:

260°C for 10 Seconds

POLARITY: Cathode indicated by polarity band
FLAMMABILITY RATING: UL 94 V−0

MAXIMUM RATINGS

Rating Symbol Max Unit

Peak Power Dissipation @ 20 ms (Note 1)

@ TL ≤ 25°C

Total Power Dissipation on FR−5 Board,

(Note 2) @ TL = 75°C
Derated above 75°C

Thermal Resistance, (Note 3)

Junction−to−Ambient

Thermal Resistance, (Note 3)

Junction−to−Lead

Junction and Storage Temperature Range TJ, T

Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits are
exceeded, device functional operation is not implied, damage may occur and
reliability may be affected.

1. Nonrepetitive current pulse per Figure 11.

2. FR−5 = 3.5 x 1.5 inches, using the minimum recommended footprint.

3. Thermal Resistance measurement obtained via infrared Scan Method.

P

pk

P

R

q

R

q

D

JA

JL

stg

225 W

500

6.7mWmW/°C

340 °C/W

150 °C/W

−55 to
+150

°C

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1

Cathode

2

1

2

Anode

SOD−123

CASE 425

STYLE 1

MARKING DIAGRAM

1

xxx = Device Code (Refer to page 2)
M = Date Code
G = Pb−Free Package

(Note: Microdot may be in either location)

xxx M G

G

ORDERING INFORMATION

Device Package Shipping

MMSZ4xxxET1 SOD−123 3000/Tape & Reel
MMSZ4xxxET1G SOD−123

(Pb−Free)

MMSZ4xxxET3 SOD−123 10000/Tape & Ree
MMSZ4xxxET3G SOD−123

(Pb−Free)

†For information on tape and reel specifications,

including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.

3000/Tape & Reel

10000/Tape & Ree

†

DEVICE MARKING INFORMATION

See specific marking information in the device marking
column of the Electrical Characteristics table on page 2 o
this data sheet.

Devices listed in bold, italic are ON Semiconductor
Preferred devices. Preferred devices are recommended
choices for future use and best overall value.

© Semiconductor Components Industries, LLC, 2005

August, 2005 − Rev. 4

1 Publication Order Number:

MMSZ4678ET1/D

MMSZ4678ET1 Series

ELECTRICAL CHARACTERISTICS (T

otherwise noted, VF = 0.95 V Max. @ IF = 10 mA)

Symbol Parameter

V

Reverse Zener Voltage @ I

Z

I

V

V

Reverse Current

ZT

I

Reverse Leakage Current @ V

R

Reverse Voltage

R

I

Forward Current

F

Forward Voltage @ I

F

F

= 25°C unless

A

ZT

R

I

I

F

VRV

Z

I

V

R

F

I

ZT

V

Zener Voltage Regulator

ELECTRICAL CHARACTERISTICS (T

Device

Device*

MMSZ4684ET1 CG3 3.13 3.3 3.47 50 7.5 1.5
MMSZ4688ET1, G CG7 4.47 4.7 4.94 50 10 3
MMSZ4689ET1, G CG8 4.85 5.1 5.36 50 10 3

MMSZ4690ET1 CG9 5.32 5.6 5.88 50 10 4

MMSZ4691ET1 CH1 5.89 6.2 6.51 50 10 5
MMSZ4692ET1 CH2 6.46 6.8 7.14 50 10 5.1
MMSZ4693ET1 CH3 7.13 7.5 7.88 50 10 5.7
MMSZ4697ET1 CH7 9.50 10 10.50 50 1 7.6
MMSZ4699ET1 CH9 11.40 12 12.60 50 0.05 9.1
MMSZ4701ET1, G CJ2 13.3 14 14.7 50 0.05 10.6
MMSZ4702ET1, G CJ3 14.25 15 15.75 50 0.05 11.4
MMSZ4703ET1 CJ4 15.20 16 16.80 50 0.05 12.1
MMSZ4705ET1 CJ6 17.10 18 18.90 50 0.05 13.6
MMSZ4709ET1 CK1 22.80 24 25.20 50 0.01 18.2
MMSZ4711ET1 CK3 25.65 27 28.35 50 0.01 20.4
MMSZ4717ET1 CK9 40.85 43 45.15 50 0.01 32.6

1. Nominal Zener voltage is measured with the device junction in thermal equilibrium at TL = 30°C ±1°C.
*The “G’’ suffix indicates Pb−Free package available.

Marking

= 25°C unless otherwise noted, VF = 0.9 V Max. @ IF = 10 mA)

A

Zener Voltage (Note 1) Leakage Current

VZ (V) @ I

Min Nom Max

mA mA

ZT

IR @ V

R

V

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2

MMSZ4678ET1 Series

8

100

0

0

.2

TYPICAL CHARACTERISTICS

7

TYPICAL TC VALUES

6
5
4
3
2

VZ @ I

ZT

1
0

−1

, TEMPERATURE COEFFICIENT (mV/ C)°θ

VZ

−2

−3

VZ, NOMINAL ZENER VOLTAGE (V)

, TEMPERATURE COEFFICIENT (mV/ C)°θ

VZ

12111098765432

TYPICAL TC VALUES

VZ @ I

ZT

10

1

10 10

VZ, NOMINAL ZENER VOLTAGE (V)

1.2

1.0

0.8

0.6

0.4

0.2

, POWER DISSIPATION (WATTS)

D

P

1000

100

0

IZ = 1 mA

Figure 1. Temperature Coefficients

(Temperature Range −55°C to +150°C)

PD versus T

PD versus T

A

T, TEMPERATURE (°C)

L

Figure 3. Steady State Power Derating

TJ = 25°C
I

= 0.1 I

Z(AC)

f = 1 kHz

5 mA

Z(DC)

Figure 2. Temperature Coefficients

(Temperature Range −55°C to +150°C)

1000

RECTANGULAR
WAVEFORM, TA = 25°C

100

10

, PEAK SURGE POWER (WATTS)

pk

P

1501251007550250

1

0.1

1 10 100 100

PW, PULSE WIDTH (ms)

Figure 4. Maximum Nonrepetitive Surge Power

1000

75 V (MMSZ5267BT1)
91 V (MMSZ5270BT1)

100

20 mA

10

, DYNAMIC IMPEDANCE ( )Ω

ZT

Z

1

101

VZ, NOMINAL ZENER VOLTAGE

Figure 5. Effect of Zener Voltage on

100

, FORWARD CURRENT (mA)

F

I

10

150°C

1

75°C 25°C 0°C

1

1.11.00.90.80.70.60.50.4

VF, FORWARD VOLTAGE (V)

Figure 6. Typical Forward Voltage

Zener Impedance

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3

MMSZ4678ET1 Series

C, CAPACITANCE (pF)

1000

I

, ZENER CURRENT (mA)

0

1000

TYPICAL CHARACTERISTICS

100

10

100

10

1

1

0 V BIAS

1 V BIAS

BIAS AT
50% OF VZ NOM

TA = 25°C

101

VZ, NOMINAL ZENER VOLTAGE (V)

Figure 7. Typical Capacitance

TA = 25°C

100

100

10

0.1

, LEAKAGE CURRENT ( A)m

0.01

R

I

0.001

0.0001

0.00001

100

10

1

+150°C

+25°C

−55°C

9

80706050403020100

VZ, NOMINAL ZENER VOLTAGE (V)

Figure 8. Typical Leakage Current

TA = 25°C

1

Z

0.1

0.01
VZ, ZENER VOLTAGE (V)

Figure 9. Zener Voltage versus Zener Current

(V

Up to 12 V)

Z

100

90
80
70
60
50
40
30
20

% OF PEAK PULSE CURRENT

10

0

020406080

, ZENER CURRENT (mA)

Z

0.1

I

0.01

1086420

12

10 30 50 70 90

Figure 10. Zener Voltage versus Zener Current

t

P

PEAK VALUE I

PULSE WIDTH (tP) IS DEFINED
AS THAT POINT WHERE THE
PEAK CURRENT DECAY = 8 ms

HALF VALUE I

t, TIME (ms)

t

r

RSM

@ 8 ms

RSM

Figure 11. 8 × 20 ms Pulse Waveform

VZ, ZENER VOLTAGE (V)

(12 V to 91 V)

/2 @ 20 ms

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4

MMSZ4678ET1 Series

PACKAGE DIMENSIONS

SOD−123

CASE 425−04

ISSUE E

D

A

A1

1

H

E

2

b

E

L

C

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

MILLIMETERS INCHES

DIM MIN NOM MAX

A 0.94 1.17 1.35 0.037

A1 0.00 0.05 0.10 0.000

b 0.51 0.61 0.71 0.020

−−−

3.56

2. ANODE

−−−

1.60

3.68 0.140

−−− −−−

c

E 2.54 2.69 2.84 0.100

H

E

L 0.25

STYLE 1:

PIN 1. CATHODE

MIN NOM MAX

0.15

0.055D 1.40 1.80

3.86

0.010

0.046

0.002

0.024

−−− −−−

0.063

0.106

0.145

−−− −−−

0.053

0.004

0.028

0.006

0.071

0.112

0.152

SOLDERING FOOTPRINT*

0.91

0.036

1.22

0.048

2.36

0.093

4.19

0.165

mm

ǒ

SCALE 10:1

inches

Ǔ

*For additional information on our Pb−Free strategy and soldering

details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.

ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
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MMSZ4678ET1/D

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