1.5SMC39AT3 Datasheet

Zener Transient Voltage Suppressors , Package: Smc, Pins=2


Features, Applications
1500 Watt Peak Power Zener Transient Voltage Suppressors

The SMC series is designed to protect voltage sensitive components from high voltage, high energy transients. They have excellent clamping capability, high surge capability, low zener impedance and fast response time. The SMC series is supplied in ON Semiconductor's exclusive, cost-effective, highly reliable SurmeticTM package and is ideally suited for use in communication systems, automotive, numerical controls, process controls, medical equipment, business machines, power supplies and many other industrial/consumer applications.


Working Peak Reverse Voltage Range 77.8 V Standard Zener Breakdown Voltage Range 91 V Peak Power � 1500 Watts 1 ms ESD Rating of Class 3 (>16 KV) per Human Body Model Maximum Clamp Voltage @ Peak Pulse Current Low Leakage 5 �A Above UL 497B for Isolated Loop Circuit Protection Maximum Temperature Coefficient Specified Response Time is Typically 1 ns

Mechanical Characteristics: CASE: Void-free, transfer-molded, thermosetting plastic FINISH: All external surfaces are corrosion resistant and leads are

YWW xxxA Y WW xxxA = Year = Work Week = Specific Device Code = (See Table on Page 3)

LEADS: Modified L�Bend providing more contact area to bond pads POLARITY: Cathode indicated by molded polarity notch MOUNTING POSITION: Any MAXIMUM RATINGS

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

*Bidirectional devices will not be available in this series. The "T3" suffix refers a 13 inch reel.

Rating Peak Power Dissipation (Note = 25�C, Pulse Width ms DC Power Dissipation = 75�C Measured Zero Lead Length (Note 2.) Derate Above 75�C Thermal Resistance from Junction to Lead DC Power Dissipation (Note = 25�C Derate Above 25�C Thermal Resistance from Junction to Ambient Forward Surge Current (Note = 25�C Operating and Storage Temperature Range Symbol PPK PD Value to +150 Unit W mW/�C �C/W W mW/�C �C/W A �C

X 1000 ms, non�repetitive 1 square copper pad, FR�4 board FR�4 board, using ON Semiconductor minimum recommended footprint, as shown in 403 case outline dimensions spec. 1/2 sine wave (or equivalent square wave), = 8.3 ms, duty cycle = 4 pulses per minute maximum.

otherwise noted, 3.5 V Max. @ IF (Note 100 A) Symbol IPP VC VRWM IR VBR IT QVBR IF VF Parameter Maximum Reverse Peak Pulse Current Clamping Voltage @ IPP Working Peak Reverse Voltage Maximum Reverse Leakage Current @ VRWM Breakdown Voltage @ IT Test Current Maximum Temperature Coefficient of VBR Forward Current Forward Voltage IF VC VBR VRWM IF

5. 1/2 sine wave or equivalent, 8.3 ms non�repetitive duty cycle
ELECTRICAL CHARACTERISTICS (Devices listed in bold, italic are ON Semiconductor Preferred devices.)

6. A transient suppressor is normally selected according to the working peak reverse voltage (VRWM), which should be equal to or greater than the DC or continuous peak operating voltage level. 7. VBR measured at pulse test current at an ambient temperature 25�C. 8. Surge current waveform per Figure 2 and derate per Figure 3 of the General Data � 1500 Watt at the beginning of this group.



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Manufacturer information


ON Semiconductor - ON Semiconductor (Nasdaq: ON) is driving energy efficient innovations, empowering customers to reduce global energy use. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help design engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power supply applications. ON Semiconductor operates a responsive, reliable, world-class supply chain and quality program, and a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions.

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