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1.5SMC6.8AT3 Series 1500 Watt Peak Power Zener Transient Voltage Suppressors
Unidirectional*
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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.
Specification Features
PLASTIC SURFACE MOUNT ZENER OVERVOLTAGE TRANSIENT SUPPRESSORS 5.8 - 78 VOLTS 1500 WATT PEAK POWER
* * * * * * * * * *
Working Peak Reverse Voltage Range - 5.8 to 77.8 V Standard Zener Breakdown Voltage Range - 6.8 to 91 V Peak Power - 1500 W @ 1.0 ms ESD Rating of Class 3 (>16 kV) per Human Body Model Maximum Clamp Voltage @ Peak Pulse Current Low Leakage < 5.0 mA Above 10 V UL 497B for Isolated Loop Circuit Protection Maximum Temperature Coefficient Specified Response Time is Typically < 1.0 ns Pb-Free Packages are Available
Cathode
Anode
SMC CASE 403 PLASTIC
MARKING DIAGRAM
Mechanical Characteristics CASE: Void-free, transfer-molded, thermosetting plastic FINISH: All external surfaces are corrosion resistant and leads are
xxxA
AYWW xxxAG G
readily solderable
MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:
260C for 10 Seconds
LEADS: Modified L-Bend providing more contact area to bond pads POLARITY: Cathode indicated by molded polarity notch MOUNTING POSITION: Any
= Specific Device Code (See Table on Page 3) A = Assembly Location Y = Year WW = Work Week G = Pb-Free Package (Note: Microdot may be in either location)
ORDERING INFORMATION
Device* 1.5SMCxxxAT3 1.5SMCxxxAT3G Package SMC SMC (Pb-Free) Shipping 2500/Tape & Reel 2500/Tape & Reel
Individual devices are listed on page 3 of this data sheet.
*The "T3" suffix refers to a 13 inch 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. **Bidirectional devices will not be available in this series.
(c) Semiconductor Components Industries, LLC, 2007
1
February, 2007 - Rev. 7
Publication Order Number: 1.5SMC6.8AT3/D
1.5SMC6.8AT3 Series
MAXIMUM RATINGS
Rating Peak Power Dissipation (Note 1) @ TL = 25C, Pulse Width = 1 ms DC Power Dissipation @ TL = 75C Measured Zero Lead Length (Note 2) Derate Above 75C Thermal Resistance, Junction-to-Lead DC Power Dissipation (Note 3) @ TA = 25C Derate Above 25C Thermal Resistance from Junction-to-Ambient Forward Surge Current (Note 4) @ TA = 25C Operating and Storage Temperature Range Symbol PPK PD RqJL PD RqJA IFSM TJ, Tstg Value 1500 4.0 54.6 18.3 0.75 6.1 165 200 -65 to +150 Unit W W mW/C C/W W mW/C C/W A C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. 10 X 1000 ms, non-repetitive 2. 1 in. square copper pad, FR-4 board 3. FR-4 board, using ON Semiconductor minimum recommended footprint, as shown in 403 case outline dimensions spec. 4. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute maximum.
ELECTRICAL CHARACTERISTICS (TA = 25C unless otherwise noted, VF = 3.5 V Max. @ IF (Note 5) = 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
I IF
IR VF IT
V
IPP
Uni-Directional TVS
5. 1/2 sine wave or equivalent, PW = 8.3 ms non-repetitive duty cycle
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1.5SMC6.8AT3 Series
ELECTRICAL CHARACTERISTICS (Devices listed in bold, italic are ON Semiconductor Preferred devices.)
VRWM (Note 6) V 5.8 6.4 7.02 7.78 8.55 9.4 10.2 11.1 12.8 13.6 15.3 17.1 18.8 20.5 23.1 25.6 28.2 30.8 33.3 36.8 40.2 43.6 47.8 53 58.1 64.1 70.1 77.8 Breakdown Voltage IR @ VRWM mA 1000 500 200 50 10 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 VBR V (Note 7) Min 6.45 7.13 7.79 8.65 9.5 10.5 11.4 12.4 14.3 15.2 17.1 19 20.9 22.8 25.7 28.5 31.4 34.2 37.1 40.9 44.7 48.5 53.2 58.9 64.6 71.3 77.9 86.5 Nom 6.8 7.5 8.2 9.1 10 11 12 13 15 16 18 20 22 24 27 30 33 36 39 43 47 51 56 62 68 75 82 91 Max 7.14 7.88 8.61 9.55 10.5 11.6 12.6 13.7 15.8 16.8 18.9 21 23.1 25.2 28.4 31.5 34.7 37.8 41 45.2 49.4 53.6 58.8 65.1 71.4 78.8 86.1 95.5 @ IT mA 10 10 10 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 VC @ IPP (Note 8) VC V 10.5 11.3 12.1 13.4 14.5 15.6 16.7 18.2 21.2 22.5 25.2 27.7 30.6 33.2 37.5 41.4 45.7 49.9 53.9 59.3 64.8 70.1 77 85 92 103 113 125 IPP A 143 132 124 112 103 96 90 82 71 67 59.5 54 49 45 40 36 33 30 28 25.3 23.2 21.4 19.5 17.7 16.3 14.6 13.3 12 QVBR %/5C 0.057 0.061 0.065 0.068 0.073 0.075 0.078 0.081 0.084 0.086 0.088 0.09 0.092 0.094 0.096 0.097 0.098 0.099 0.1 0.101 0.101 0.102 0.103 0.104 0.104 0.105 0.105 0.106
Device* 1.5SMC6.8AT3, G 1.5SMC7.5AT3, G 1.5SMC8.2AT3, G 1.5SMC9.1AT3 1.5SMC10AT3 1.5SMC11AT3 1.5SMC12AT3, G 1.5SMC13AT3, G 1.5SMC15AT3, G 1.5SMC16AT3, G 1.5SMC18AT3, G 1.5SMC20AT3, G 1.5SMC22AT3, G 1.5SMC24AT3, G 1.5SMC27AT3, G 1.5SMC30AT3, G 1.5SMC33AT3, G 1.5SMC36AT3, G 1.5SMC39AT3, G 1.5SMC43AT3, G 1.5SMC47AT3, G 1.5SMC51AT3, G 1.5SMC56AT3, G 1.5SMC62AT3, G 1.5SMC68AT3, G 1.5SMC75AT3, G 1.5SMC82AT3, G 1.5SMC91AT3, G
Device Marking 6V8A 7V5A 8V2A 9V1A 10A 11A 12A 13A 15A 16A 18A 20A 22A 24A 27A 30A 33A 36A 39A 43A 47A 51A 56A 62A 68A 75A 82A 91A
Devices listed in bold, italic are ON Semiconductor Preferred devices. Preferred devices are recommended choices for future use and best overall value.
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 IT at an ambient temperature of 25C. 8. Surge current waveform per Figure 2 and derate per Figure 3 of the General Data - 1500 Watt at the beginning of this group. * The "G" suffix indicates Pb-Free package available.
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1.5SMC6.8AT3 Series
100 NONREPETITIVE PULSE WAVEFORM SHOWN IN FIGURE 2 tr 10 ms 100 VALUE (%) PEAK VALUE - IPP I HALF VALUE - PP 2 PULSE WIDTH (tP) IS DEFINED AS THAT POINT WHERE THE PEAK CURRENT DECAYS TO 50% OF IPP.
Ppk, PEAK POWER (kW)
10
50 tP 1 0.1 ms 1 ms 10 ms 100 ms tP, PULSE WIDTH 1 ms 10 ms 0 0 1
2 t, TIME (ms)
3
4
Figure 1. Pulse Rating Curve
160 PEAK PULSE DERATING IN % OF PEAK POWER OR CURRENT @ T = 25 C A 140 120 100 80 60 40 20 0 0 25 50 75 100 125 150 1000 IT, TEST CURRENT (AMPS) 500 200 100 50 20 10 5 2 1 0.3 TL = 25C tP = 10 ms
Figure 2. Pulse Waveform
VBR (NOM) = 6.8 TO 13 V 20 V 43 V 24 V 75 V 120 V 180 V
0.5 0.7 1
2
3
5
7 10
20
30
TA, AMBIENT TEMPERATURE (C)
DVBR, INSTANTANEOUS INCREASE IN VBR ABOVE VBR (NOM) (VOLTS)
Figure 3. Pulse Derating Curve
Figure 4. Dynamic Impedance
UL RECOGNITION The entire series has Underwriters Laboratory Recognition for the classification of protectors (QVGV2) under the UL standard for safety 497B and File #E210057. Many competitors only have one or two devices recognized or have recognition in a non-protective category. Some competitors have no recognition at all. With the UL497B recognition, our parts successfully passed several tests including Strike Voltage Breakdown test, Endurance Conditioning, Temperature test, Dielectric Voltage-Withstand test, Discharge test and several more. Whereas, some competitors have only passed a flammability test for the package material, we have been recognized for much more to be included in their Protector category.
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1.5SMC6.8AT3 Series
APPLICATION NOTES
RESPONSE TIME
In most applications, the transient suppressor device is placed in parallel with the equipment or component to be protected. In this situation, there is a time delay associated with the capacitance of the device and an overshoot condition associated with the inductance of the device and the inductance of the connection method. The capacitive effect is of minor importance in the parallel protection scheme because it only produces a time delay in the transition from the operating voltage to the clamp voltage as shown in Figure 5. The inductive effects in the device are due to actual turn-on time (time required for the device to go from zero current to full current) and lead inductance. This inductive effect produces an overshoot in the voltage across the equipment or component being protected as shown in Figure 6. Minimizing this overshoot is very important in the application, since the main purpose for adding a transient suppressor is to clamp voltage spikes. The SMC series have a very good response time, typically < 1.0 ns and negligible inductance. However, external inductive effects could produce unacceptable overshoot. Proper circuit layout,
minimum lead lengths and placing the suppressor device as close as possible to the equipment or components to be protected will minimize this overshoot. Some input impedance represented by Zin is essential to prevent overstress of the protection device. This impedance should be as high as possible, without restricting the circuit operation.
DUTY CYCLE DERATING
The data of Figure 1 applies for non-repetitive conditions and at a lead temperature of 25C. If the duty cycle increases, the peak power must be reduced as indicated by the curves of Figure 7. Average power must be derated as the lead or ambient temperature rises above 25C. The average power derating curve normally given on data sheets may be normalized and used for this purpose. At first glance the derating curves of Figure 7 appear to be in error as the 10 ms pulse has a higher derating factor than the 10 ms pulse. However, when the derating factor for a given pulse of Figure 7 is multiplied by the peak power value of Figure 1 for the same pulse, the results follow the expected trend.
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1.5SMC6.8AT3 Series
TYPICAL PROTECTION CIRCUIT
Zin
Vin
LOAD
VL
V
Vin (TRANSIENT)
V
OVERSHOOT DUE TO INDUCTIVE EFFECTS
Vin (TRANSIENT) VL
VL
Vin td tD = TIME DELAY DUE TO CAPACITIVE EFFECT t
t
Figure 5.
Figure 6.
1 0.7 0.5 DERATING FACTOR 0.3 0.2 0.1 0.07 0.05 0.03 0.02 10 ms 0.01 0.1 0.2 0.5 1 2 5 10 D, DUTY CYCLE (%) 20 50 100 100 ms PULSE WIDTH 10 ms
1 ms
Figure 7. Typical Derating Factor for Duty Cycle
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1.5SMC6.8AT3 Series
PACKAGE DIMENSIONS
SMC CASE 403-03 ISSUE E
HE E
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. D DIMENSION SHALL BE MEASURED WITHIN DIMENSION P. 4. 403-01 THRU -02 OBSOLETE, NEW STANDARD 403-03. DIM A A1 b c D E HE L L1 MIN 1.90 0.05 2.92 0.15 5.59 6.60 7.75 0.76 MILLIMETERS NOM MAX 2.13 2.41 0.10 0.15 3.00 3.07 0.23 0.30 5.84 6.10 6.86 7.11 7.94 8.13 1.02 1.27 0.51 REF MIN 0.075 0.002 0.115 0.006 0.220 0.260 0.305 0.030 INCHES NOM 0.084 0.004 0.118 0.009 0.230 0.270 0.313 0.040 0.020 REF MAX 0.095 0.006 0.121 0.012 0.240 0.280 0.320 0.050
b
D
A c A1
L
L1
SOLDERING FOOTPRINT*
4.343 0.171
3.810 0.150
2.794 0.110
SCALE 4:1
mm inches
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
Surmetic is a trademark of Semiconductor Components Industries, LLC.
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative
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1.5SMC6.8AT3/D

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