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.
http://onsemi.com
Features
• 500 mW Rating on FR−4 or FR−5 Board
1
2
• 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)
Cathode
Anode
SOD−123
CASE 425
STYLE 1
2
• Pb−Free Packages are Available
1
Mechanical Characteristics:
CASE: Void-free, transfer-molded, thermosetting plastic case
FINISH: Corrosion resistant finish, easily solderable
MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:
260°C for 10 Seconds
MARKING DIAGRAM
POLARITY: Cathode indicated by polarity band
FLAMMABILITY RATING: UL 94 V−0
xxx M G
1
G
MAXIMUM RATINGS
xxx = Device Code (Refer to page 2)
Rating
Symbol
Max
Unit
M
= Date Code
G
= Pb−Free Package
(Note: Microdot may be in either location)
Peak Power Dissipation @ 20 ms (Note 1)
P
225
W
pk
@ T ≤ 25°C
L
Total Power Dissipation on FR−5 Board,
P
D
(Note 2) @ T = 75°C
Derated above 75°C
500
6.7
mW
mW/°C
ORDERING INFORMATION
L
†
Device
Package
Shipping
Thermal Resistance, (Note 3)
Junction−to−Ambient
R
340
°C/W
°C/W
°C
q
JA
MMSZ4xxxET1
SOD−123
3000/Tape & Reel
3000/Tape & Reel
Thermal Resistance, (Note 3)
Junction−to−Lead
R
q
JL
150
MMSZ4xxxET1G SOD−123
(Pb−Free)
Junction and Storage Temperature Range
T , T
J
−55 to
+150
stg
MMSZ4xxxET3
SOD−123 10000/Tape & Reel
MMSZ4xxxET3G SOD−123 10000/Tape & Reel
(Pb−Free)
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.
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
DEVICE MARKING INFORMATION
See specific marking information in the device marking
column of the Electrical Characteristics table on page 2 of
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
1
Publication Order Number:
August, 2005 − Rev. 4
MMSZ4678ET1/D