Details, datasheet, quote on part number: 1SMA70A
CategoryDiscrete => TVS (Transient Transient Voltage Suppressors)
Description400W Zener Suppressor
CompanyON Semiconductor
DatasheetDownload 1SMA70A datasheet
Cross ref.Similar parts: SMAJ70A, PTVS64VS1UR, 1SMA70AT3, TFMAJ70A
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Features, Applications
400 Watt Peak Power Zener Transient Voltage Suppressors

The SMA 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 SMA series is supplied in ON Semiconductor's exclusive, cost-effective, highly reliable Surmetict 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 78 V Standard Zener Breakdown Voltage Range 91.25 V Peak Power 1 ms ESD Rating of Class 3 16 KV) per Human Body Model Response Time is Typically 1 ns Flat Handling Surface for Accurate Placement Package Design for Top Slide or Bottom Circuit Board Mounting Low Profile Package Pb-Free Packages are Available

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

260C for 10 Seconds POLARITY: Cathode indicated by molded polarity notch or polarity band MOUNTING POSITION: Any

= Specific Device Code = (See Table on Page 3) = Assembly Location = Year = Work Week
Device 1SMAxxAT3 1SMAxxAT3G Package SMA (Pb-Free) Shipping 5000/Tape & Reel 5000/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.

Individual devices are listed on page 3 of this data sheet.

Rating Peak Power Dissipation (Note = 25C, Pulse Width ms DC Power Dissipation = 75C Measured Zero Lead Length (Note 2) Derate Above 75C Thermal Resistance from Junction to Lead DC Power Dissipation (Note = 25C Derate Above 25C Thermal Resistance from Junction to Ambient Forward Surge Current (Note = 25C Operating and Storage Temperature Range Symbol PPK PD Value to +150 Unit W mW/C C/W W mW/C C/W A 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. X 1000 ms, non-repetitive 2. 1 square copper pad, FR-4 board 3. FR-4 board, using ON Semiconductor minimum recommended footprint, as shown in 403B case outline dimensions spec. 4. 1/2 sine wave (or equivalent square wave), = 8.3 ms, duty cycle = 4 pulses per minute maximum.

(TA = 25C unless otherwise noted, 3.5 V Max. 30 A for all types) (Note 5) Symbol IPP Parameter Maximum Reverse Peak Pulse Current Clamping Voltage @ IPP Working Peak Reverse Voltage Maximum Reverse Leakage Current @ VRWM Breakdown Voltage @ IT Test Current Forward Current Forward Voltage @ IF

5. 1/2 sine wave or equivalent, = 8.3 ms, non-repetitive duty cycle.

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 25C 8. Surge current waveform per Figure 2 and derate per Figure 3 * The "G" suffix indicates Pb-Free package available.


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