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SA SERIES
Transient Voltage Suppressor Diodes
Voltage Range 5.0 to 170 Volts 500 Watts Peak Power 1.0 Watt Steady State
Features
Plastic package has Underwriters Laboratory Flammability Classification 94V-0 500W surge capability at 10 X 10us waveform, duty cycle: 0.01% Excellent clamping capability Low zener impedance Fast response time: Typically less than 1.0ps from 0 volts to VBR for unidirectional and 5.0 ns for bidirectional Typical IR less than 1A above 10V High temperature soldering guaranteed: 260C / 10 seconds / .375",(9.5mm) lead length / 5lbs.,(2.3kg) tension
DO-15
Mechanical Data
Case: Molded plastic Lead: Axial leads, solderable per MIL-STDLead: 202, Method 208 Polarity: Color band denotes cathode except bipolar Weight: 0.34 gram
Dimensions in inches and (millimeters)
Maximum Ratings and Electrical Characteristics
Rating at 25C ambient temperature unless otherwise specified. Type Number
Peak Power Dissipation at TA=25OC, Tp=1ms (Note 1) Steady State Power Dissipation at TL=75 C Lead Lengths .375", 9.5mm (Note 2) Peak Forward Surge Current, 8.3 ms Single Half Sine-wave Superimposed on Rated Load (JEDEC method) (Note 3) Maximum Instantaneous Forward Voltage at 35.0A for Unidirectional Only Operating and Storage Temperature Range
Symbol PPK PD IFSM VF TJ, TSTG
Value Minimum 500 1.0 70 3.5 -55 to + 175
Units Watts Watts Amps Volts C
Notes: 1. Non-repetitive Current Pulse Per Fig. 3 and Derated above TA=25OC Per Fig. 2. Notes: 2. Mounted on Copper Pad Area of 1.6 x 1.6" (40 x 40 mm) Per Fig. 5. Notes: 3. 8.3ms Single Half Sine-wave or Equivalent Square Wave, Duty Cycle=4 Pulses Per Minutes Notes: 3. Maximum. Devices for Bipolar Applications Notes: 1. For Bidirectional Use C or CA Suffix for Types SA5.0 through Types SA170. Notes: 2. Electrical Characteristics Apply in Both Directions.
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RATINGS AND CHARACTERISTIC CURVES (SA SERIES)
FIG.1- PEAK PULSE POWER RATING CURVE
PEAK PULSE POWER (Ppp) or CURRENT (IPPM) DERATING IN PERCENTAGE, %
40
NON-REPETITIVE PULSE WAVEFORM SHOWN in FIG.3 TA=250C
FIG.2- PULSE DERATING CURVE
100
PPPM, PEAK PULSE POWER, KW
10
75
PPK 5
O
IMPULSE EXPONENTIAL DECAY ld
50
1
HALF SINE PPK ld ld=7lp PPK ld CURRENT WAVEFORM SQUARE
25
0.1 0.1ms
1ms
10ms
100ms
1,000ms
10,000ms
0
0
25
50
75
100
125
o
150
175
200
tp, PULSE WIDTH, sec.
TA, AMBIENT TEMPERATURE, C
FIG.3- PULSE WAVEFORM
150 200
PULSE WIDTH (td) is DEFINED as the POINT WHERE the PEAK CURRENT DECAYS to 50% of lPPM
FIG.4- MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT UNIDIRECTIONAL ONLY
lFSM, PEAK FORWARD SURGE CURRENT, AMPERES
8.3ms Single Half Sine Wave JEDEC Method
tr=10msec.
PEAK PULSE CURRENT - %
100
PEAK VALUE lPPM
100
HALF VALUE- lPPM 2 10/1000msec. WAVEFORM as DEFINED by R.E.A.
50
0
td
10 1.0 2.0 t, TIME, ms 3.0 4.0 1 10 NUMBER OF CYCLES AT 60Hz 100
0
FIG.5- STEADY STATE POWER DERATING CURVE
PM(AV), STEADY STATE POWER DISSIPATION, WATTS
1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0 25 50 75 100 125
o
L=0.375"(9.5mm) LEAD LENGTHS
1.6 X 1.6 X .040" (40 X 40 X 1mm.) COPPER HEAT SINKS
150
175
200
TL, LEAD TEMPERATURE, C
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ELECTRICAL CHARACTERISTICS (TA=25OC unless otherwise noted)
Device
Breakdown Voltage VBR (Volts) (Note 1) Min SA5.0 SA5.0A SA6.0 SA6.0A SA6.5 SA6.5A SA7.0 SA7.0A SA7.5 SA7.5A SA8.0 SA8.0A SA8.5 SA8.5A SA9.0 SA9.0A SA10 SA10A SA11 SA11A SA12 SA12A SA13 SA13A SA14 SA14A SA15 SA15A SA16 SA16A SA17 SA17A SA18 SA18A SA20 SA20A SA22 SA22A SA24 SA24A SA26 SA26A SA28 SA28A SA30 SA30A SA33 SA33A SA36 SA36A SA40 SA40A SA43 SA43A 6.40 6.40 6.67 6.67 7.22 7.22 7.78 7.78 8.33 8.33 8.89 8.89 9.44 9.44 10.0 10.0 11.1 11.1 12.2 12.2 13.3 13.3 14.4 14.4 15.6 15.6 16.7 16.7 17.8 17.8 18.9 18.9 20.0 20.0 22.2 22.2 24.4 24.4 26.7 26.7 28.9 28.9 31.1 31.1 33.3 33.3 36.7 36.7 40.0 40.0 44.4 44.4 47.8 47.8 Max 7.30 7.00 8.15 7.37 8.82 7.98 9.51 8.60 10.2 9.21 10.9 9.83 11.5 10.4 12.2 11.1 13.6 12.3 14.9 13.5 16.3 14.7 17.6 15.9 19.1 17.2 20.4 18.5 21.8 19.7 23.1 20.9 24.4 22.1 27.1 24.5 29.8 26.9 32.6 29.5 35.3 31.9 38.0 34.4 40.7 36.8 44.9 40.6 48.9 44.2 54.3 49.1 58.4 52.8 Test Current @IT (mA) 10 10 10 10 10 10 10 10 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Stand-Off Voltage VWM (Volts) 5.0 5.0 6.0 6.0 6.5 6.5 7.0 7.0 7.5 7.5 8.0 8.0 8.5 8.5 9.0 9.0 10.0 10.0 11.0 11.0 12.0 12.0 13.0 13.0 14.0 14.0 15.0 15.0 16.0 16.0 17.0 17.0 18.0 18.0 20.0 20.0 22.0 22.0 24.0 24.0 26.0 26.0 28.0 28.0 30.0 30.0 33.0 33.0 36.0 36.0 40.0 40.0 43.0 43.0 Maximum Reverse Leakage at VWM ID (uA) 600 600 600 600 400 400 150 150 50 50 25 25 10 10 5.0 5.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Maximum Peak Pulse Current IPPM (Note 2)(Amps) 54.0 57.0 46.0 50.0 42.0 46.0 39.0 43.0 36.0 40.0 35.0 38.0 33.0 36.0 31.0 34.0 27.0 30.0 26.0 28.0 23.0 26.3 22.0 24.0 20.3 22.6 19.5 21.0 18.0 20.0 17.0 19.0 16.3 17.9 14.0 16.0 13.0 14.7 12.0 13.4 11.0 12.4 10.0 11.5 9.8 10.8 8.8 9.8 8.1 9.0 7.3 8.1 6.8 7.5 Maximum Clamping Voltage at IPPM VC(Volts) 9.60 9.20 11.4 10.3 12.3 11.2 13.3 12.0 14.3 12.9 15.0 13.6 15.9 14.4 16.9 15.4 18.8 17.0 20.1 18.2 22.0 19.9 23.8 21.5 25.8 23.2 26.9 24.4 28.8 26.0 30.5 27.6 32.2 29.2 35.8 32.4 39.4 35.5 43.0 38.9 46.6 42.1 50.1 45.4 53.5 48.4 59.0 53.3 64.3 58.1 71.4 64.5 76.7 69.4 Maximum Temperature Coefficient of VBR mV / OC) 5.0 5.0 5.0 5.0 5.0 5.0 6.0 6.0 7.0 7.0 7.0 7.0 8.0 8.0 9.0 9.0 10.0 10.0 11.0 11.0 12.0 12.0 13.0 13.0 14.0 14.0 16.0 16.0 19.0 17.0 20.0 19.0 21.0 20.0 25.0 23.0 28.0 25.0 31.0 28.0 31.0 30.0 35.0 31.0 39.0 36.0 42.0 39.0 46.0 41.0 51.0 46.0 55.0 50.0
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ELECTRICAL CHARACTERISTICS (TA=25 C unless otherwise noted)
Device
Breakdown Voltage VBR (Volts) (Note 1) Min Max Test Current @IT (mA) Stand-Off Voltage VWM (Volts) Maximum Reverse Leakage at VWM ID (uA) 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Maximum Peak Pulse Current IPPM (Note 2)(Amps) 6.5 7.2 6.1 6.7 5.7 6.3 5.4 6.0 5.0 5.6 4.9 5.4 4.6 5.0 4.2 4.6 3.9 4.3 3.7 4.1 3.4 3.8 3.2 3.5 2.9 3.2 2.6 2.9 2.4 2.7 2.2 2.5 1.9 2.1 2.0 2.0 1.7 1.9 Maximum Clamping Voltage at IPPM VC(Volts) 80.3 72.7 85.5 77.4 91.1 82.4 96.3 87.1 103 93.6 107 96.8 114 103 125 113 134 121 139 126 151 137 160 146 179 162 196 177 214 193 230 209 268 243 257 259 304 275 Maximum Temperature Coefficient of VBR mV /OC) 58.0 52.0 63.0 56.0 66.0 61.0 71.0 65.0 78.0 70.0 80.0 71.0 86.0 76.0 94.0 85.0 101 91 105 95 114 103 121 110 135 123 148 133 162 146 175 158 203 184 217 196 230 208
O
50.0 61.1 1.0 45.0 SA45 50.0 55.3 1.0 45.0 SA45A 53.3 65.2 1.0 48.0 SA48 53.3 58.9 1.0 48.0 SA48A 56.7 69.3 1.0 51.0 SA51 56.7 62.7 1.0 51.0 SA51A 60.0 73.3 1.0 54.0 SA54 60.0 66.3 1.0 54.0 SA54A 64.4 78.7 1.0 58.0 SA58 64.4 71.2 1.0 58.0 SA58A 66.7 81.5 1.0 60.0 SA60 66.7 73.7 1.0 60.0 SA60A 71.1 86.9 1.0 64.0 SA64 71.1 78.6 1.0 64.0 SA64A 77.8 95.1 1.0 70.0 SA70 77.8 86 1.0 70.0 SA70A 88.3 102 1.0 75.0 SA75 88.3 92.1 1.0 75.0 SA75A 86.7 103 1.0 78.0 SA78 86.7 95.8 1.0 78.0 SA78A 94.4 115 1.0 85.0 SA85 94.4 104 1.0 85.0 SA85A 100 122 1.0 90.0 SA90 100 111 1.0 90.0 SA90A 111 136 1.0 100 SA100 111 123 1.0 100 SA100A 122 149 1.0 110 SA110 122 135 1.0 110 SA110A 133 163 1.0 120 SA120 133 147 1.0 120 SA120A 144 176 1.0 130 SA130 144 159 1.0 130 SA130A 167 204 1.0 150 SA150 167 185 1.0 150 SA150A 178 218 1.0 160 SA160 178 197 1.0 160 SA160A 189 231 1.0 170 SA170 189 209 1.0 170 SA170A Notes: 1. VBR measured after IT applied for 300us, IT = square wave pulse or equivallent. 2. Surge current waveform per Figure 3 and derate per Figure 2. 3. For bipolar types with VWM of 10 Volts and under, the ID limit is doubled. 4. All terms and symbols are consistent ANSI/IEEE C62.35.
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TVS APPLICATION NOTES:
Transient Voltage Suppressors may be used at various points in a circuit to provide various degrees of protection. The following is a typical linear power supply with transient voltage suppressor units placed at different points. All provide protection of the load.
FIGURE 1
Transient Voltage Suppressors 1 provides maximum protection. However, the system will probably require replacement of the line fuse(F) since it provides a dominant portion of the series impedance when a surge is encountered. However, we do not recommend to use the TVS diode here, unless we can know the electric circuit impedance and the magnitude of surge rushed into the circuit. Otherwise the TVS diode is easy to be destroyed by voltage surge. Transient Voltage Suppressor 2 provides execllent protection of circuitry excluding the transformer(T). However, since the transformer is a large part of the series impedance, the chance of the line fuse opening during the surge condition is reduced. Transient Voltage Suppressor 3 provides the load with complete protection. It uses a unidirectional Transient Voltage Suppressor, which is a cost advantage. The series impedance now includes the line fuse, transformer, and bridge rectifier(B) so failure of the line fuse is further reduced. If only Transient Voltage Suppressor 3 is in use, then the bridge rectifier is unprotected and would require a higher voltage and current rating to prevent failure by transients. Any combination of these three, or any one of these applications, will prevent damage to the load. This would require varying trade-offs in power supply protection versus maintenance(changing the time fuse). An additional method is to utilize the Transient Voltage Suppressor units as a controlled avalanche bridge. This reduces the parts count and incorporates the protection within the bridge rectifier.
FIGURE 2
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