© Semiconductor Components Industries, LLC, 2005

January, 2005 − Rev. 5

1

Publication Order Number:

MMSZ5221BT1/D

MMSZ5221BT1 Series

Preferred Device

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

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

POLARITY:

Cathode indicated by polarity band

FLAMMABILITY RATING:

UL 94 V−0

MAXIMUM RATINGS

Rating

Symbol

Max

Unit

Total Power Dissipation on FR−5 Board,

Derated above 75

°C

500

6.7

mW

mW/

°C

Thermal Resistance, (Note 2)

Junction−to−Ambient

340

°C/W

Thermal Resistance, (Note 2)

Junction−to−Lead

150

°C/W

Junction and Storage Temperature Range

−55 to

+150

°C

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

2. Thermal Resistance measurement obtained via infrared Scan Method.

Device**

Package

ORDERING INFORMATION

SOD−123

CASE 425

STYLE 1

1

Cathode

2

Anode

MMSZ52xxBT1

SOD−123

3000/Tape & Reel

MARKING DIAGRAM

See specific marking information in the device marking

column of the Electrical Characteristics table on page 3 of

this data sheet.

DEVICE MARKING INFORMATION

xx

= Specific Device Code

M

= Date Code

xx M

**The “T1” suffix refers to an 8 mm, 7 inch reel.

The “T3” suffix refers to an 8 mm, 13 inch reel.

1

2

Devices listed in

bold, italic are ON Semiconductor

Preferred devices. Preferred devices are recommended

choices for future use and best overall value.

MMSZ52xxBT3

SOD−123

10,000/Tape & Reel

†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.

MMSZ52xxBT1G

SOD−123

(Pb−Free)

3000/Tape & Reel

MMSZ52xxBT3G

SOD−123

(Pb−Free)

10,000/Tape & Reel

http://onsemi.com