R
UMW
SMxxT1G
These dual monolithic silicon surge protection diodes are designed
for applications requiring transient overvoltage protection capability.
They are intended for use in voltage and ESD sensitive equipment such
as computers, printers, business machines, communication systems,
medical equipment and other applications. Their dual junction common
anode design protects two separate lines using only one package. These
devices are ideal for situations where board space is at a premium.
1
2
3
PIN 1. CATHODE
2. CATHODE
3. ANODE
Specification Features:
• SOT−23 Package Allows Either Two Separate Unidirectional
Configurations or a Single Bidirectional Configuration
• Working Peak Reverse Voltage Range − 5.0 V to 36 V
• Peak Power − 300 Watt (8/20 ms)
• Low Leakage − 1.0mA
• Flammability Rating UL 94 V−0
• These are Pb−Free Devices
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
Package Designed for Optimal Automated Board Assembly
Small Package Size for High Density Applications
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
W
Peak Power Dissipation @ 20 ms (Note 1) @ T ≤ 25°C
P
pk
300
L
IEC 61000−4−2 (ESD)
Air
Contact
kV
15
26
IEC 61000−4−4 (EFT)
40
12
A
A
IEC 61000−4−5 (Lightning)
Total Power Dissipation on FR−5 Board (Note 2) @ T = 25°C
°P °
225
1.8
556
°mW°
mW/°C
°C/W
A
D
Derate above 25°C
Thermal Resistance, Junction−to−Ambient
R
q
JA
Total Power Dissipation on Alumina Substrate (Note 3) @ T = 25°C
°P
300
2.4
417
°mW
mW/°C
°C/W
A
D
Derate above 25°C
Thermal Resistance, Junction−to−Ambient
R
q
JA
Junction and Storage Temperature Range
T , T
− 55 to +150
260
°C
°C
J
stg
Lead Solder Temperature − Maximum (10 Second Duration)
T
L
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. Non−repetitive current pulse per Figure 3
2. FR−5 = 1.0 x 0.75 x 0.62 in.
3. Alumina = 0.4 x 0.3 x 0.024 in., 99.5% alumina
NOTE: Other voltages may be available upon request
www.umw-ic.com
1
UTD Semiconductor Co.,Limited