Next Previous Varistor Products Line Voltage Operation, Radial Lead LA Varistor Series ® The LA Series of transient voltage surge suppressors are radial-lead varistors (MOVs) that are designed to be operated continuously across AC power lines. These UL recognized varistors require very little mounting space, and are offered in various standard lead form options. The LA Series varistors are available in four model sizes: 7mm, 10mm, 14mm and 20mm; and have a VM(AC)RMS voltage range from 130V to 1000V, and an energy absorption capability up to 360J. Some LA series model numbers are available with clamping voltage selections, designated by a model number suffix of either A or B. The “A” selection is the standard model; the “B” selection provides a lower clamping voltage. See LA Series Device Ratings and Specifications table for part number and brand information. Features • Energy Absorption Capability (WTM) . . .. . . . . . . . . . . . . . . . . Up to 360J • Wide Operating Voltage Range VM(AC)RMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130V to 1000V • No Derating Up to 85oC Ambient • Available in Tape and Reel or Bulk Pack AGENCY APPROVALS: Recognized under the components program of Underwriters Laboratories. Certified by CSA, VDE and CECC. AGENCY FILE NUMBERS: UL E75961, E56529, E135010; CSA LR91788; VDE 116895E; CECC 42201-006. ALSO SEE LITTELFUSE ULTRAMOV™ AND C-III VARISTOR SERIES 50 w w w. l i t t e l f u s e . c o m D V E ® Next Previous Varistor Products Line Voltage Operation, Radial Lead LA Varistor Series Absolute Maximum Ratings For ratings of individual members of a series, see Device Ratings and Specifications chart UNITS V V A J C 0 C %/0C V 0 (Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301) Insulation Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 MΩ CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Device Ratings and Specifications MAXIMUM RATING (85 oC) CONTINUOUS PART NUMBER MODEL SIZE DISC DIA. (mm) DEVICE MODEL NUMBER BRANDING SPECIFICATIONS (25 oC) TRANSIENT VRMS VDC ENERGY 10 x 1000µs PEAK CURRENT 8 x 20µs VM(AC) VM(DC) WTM ITM (V) (V) (J) (A) VARISTOR VOLTAGE AT 1mA DC TEST CURRENT VNOM MAX VNOM MIN (V) MAXIMUM CLAMPING VOLTAGE 8 x 20µs TYPICAL CAPACITANCE f = 1MHz VC IPK C (V) (A) (pF) 180 V130LA1 7 1301 130 175 11 1200 184 255 390 10 V130LA2 7 1302 130 175 11 1200 184 228 340 10 180 V130LA5 10 1305 130 175 20 2500 184 228 340 25 450 V130LA10A 14 130L10 130 175 38 4500 184 228 340 50 1000 V130LA20A 20 130L20 130 175 70 6500 184 228 340 100 1900 V130LA20B 20 130L20B 130 175 70 6500 184 220 325 100 1900 V140LA2 7 1402 140 180 12 1200 198 242 360 10 160 V140LA5 10 1405 140 180 22 2500 198 242 360 25 400 V140LA10A 14 140L10 140 180 42 4500 198 242 360 50 900 V140LA20A 20 140L20 140 180 75 6500 198 242 340 100 1750 V150LA1 7 1501 150 200 13 1200 212 284 430 10 150 V150LA2 7 1502 150 200 13 1200 212 268 395 10 150 V150LA5 10 1505 150 200 25 2500 212 268 395 25 360 V150LA10A 14 150L10 150 200 45 4500 212 268 395 50 800 V150LA20A 20 150L20 150 200 80 6500 212 268 395 100 1600 V150LA20B 20 150L20B 150 200 80 6500 212 243 360 100 1600 V175LA2 7 1752 175 225 15 1200 247 303 455 10 130 V175LA5 10 1755 175 225 30 2500 247 303 455 25 350 V175LA10A 14 175L10 175 225 55 4500 247 303 455 50 700 V175LA20A 20 175L20 175 225 90 6500 247 303 455 100 1400 V230LA4 7 2304 230 300 20 1200 324 396 595 10 100 V230LA10 10 230L 230 300 35 2500 324 396 595 25 250 V230LA20A 14 230L20 230 300 70 4500 324 396 595 50 550 V230LA40A 20 230L40 230 300 122 6500 324 396 595 100 1100 w w w. l i t t e l f u s e . c o m 51 2 VARISTOR PRODUCTS LA SERIES Continuous: Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 to 1000 DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 to 1200 Transients: Peak Pulse Current (ITM) For 8/20µs Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1200 to 6500 Single Pulse Energy Range For 10/1000µs Current Wave (WTM ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 to 360 Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85 Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125 Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01 Hi-Pot Encapsulation (Isolation Voltage Capability) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500 Varistor Products Line Voltage Operation, Radial Lead LA Varistor Series Device Ratings and Specifications (Continued) MAXIMUM RATING (85 oC) CONTINUOUS PART NUMBER 52 MODEL SIZE DISC DIA. (mm) DEVICE MODEL NUMBER BRANDING SPECIFICATIONS (25 oC) TRANSIENT VRMS VDC ENERGY 10 x 1000µs PEAK CURRENT 8 x 20µs VM(AC) VM(DC) WTM ITM (V) (V) (J) (A) VARISTOR VOLTAGE AT 1mA DC TEST CURRENT VNOM MAX VNOM MIN (V) MAXIMUM CLAMPING VOLTAGE 8 x 20µs TYPICAL CAPACITANCE f = 1MHz VC IPK C (V) (A) (pF) 90 V250LA2 7 2502 250 330 21 1200 354 473 730 10 V250LA4 7 2504 250 330 21 1200 354 429 650 10 90 V250LA10 10 250L 250 330 40 2500 354 429 650 25 220 V250LA20A 14 250L20 250 330 72 4500 354 429 650 50 500 V250LA40A 20 250L40 250 330 130 6500 354 429 650 100 1000 V250LA40B 20 250L40B 250 330 130 6500 354 413 620 100 1000 V275LA2 7 2752 275 369 23 1200 389 515 775 10 80 V275LA4 7 2754 275 369 23 1200 389 473 710 10 80 V275LA10 10 275L 275 369 45 2500 389 473 710 25 200 V275LA20A 14 275L20 275 369 75 4500 389 473 710 50 450 V275LA40A 20 275L40 275 369 140 6500 389 473 710 100 900 V275LA40B 20 275L40B 275 369 140 6500 389 453 680 100 900 V300LA2 7 3002 300 405 25 1200 420 565 870 10 70 V300LA4 7 3004 300 405 25 1200 420 517 775 10 70 V300LA10 10 300L 300 405 46 2500 420 517 775 25 180 V300LA20A 14 300L20 300 405 77 4500 420 517 775 50 400 V300LA40A 20 300L40 300 405 165 6500 420 517 775 100 800 V320LA7 7 3207 320 420 25 1200 462 565 850 10 65 V320LA10 10 320L 320 420 48 2500 462 565 850 25 170 V320LA20A 14 320L20 320 420 80 4500 462 565 850 50 380 V320LA40B 20 320L40 320 420 150 6500 462 540 810 100 750 V385LA7 7 3857 385 505 27 1200 558 682 1025 10 60 V385LA10 10 385L 385 505 51 2500 558 682 1025 25 160 V385LA20A 14 385L20 385 505 85 4500 558 682 1025 50 360 V385LA40B 20 385L40 385 505 160 6500 558 682 1025 100 700 V420LA7 7 4207 420 560 30 1200 610 748 1120 10 55 V420LA10 10 420L 420 560 55 2500 610 748 1120 25 140 V420LA20A 14 420L20 420 560 90 4500 610 748 1120 50 300 V420LA40B 20 420L40 420 560 160 6500 610 720 1060 100 600 V460LA7 7 4607 460 615 37 1200 702 858 1130 10 55 V480LA7 7 4807 480 640 35 1200 670 825 1240 10 50 V480LA10 10 480L 480 640 60 2500 670 825 1240 25 120 V480LA40A 14 480L40 480 640 105 4500 670 825 1240 50 270 V480LA80B 20 480L80 480 640 180 6500 670 790 1160 100 550 V510LA10 10 510L 510 675 63 2500 735 910 1350 25 100 V510LA40A 14 510L40 510 675 110 4500 735 910 1350 50 250 V510LA80B 20 510L80 510 675 190 6500 735 860 1280 100 500 V575LA10 10 575L 575 730 65 2500 805 1000 1500 25 90 V575LA40A 14 575L40 575 730 120 4500 805 1000 1500 50 220 V575LA80B 20 575L80 575 730 220 6500 805 960 1410 100 450 V625LA10 10 625L 625 825 67 2500 900 1100 1650 25 80 V625LA40A 14 625L40 625 825 125 4500 900 1100 1650 50 210 V625LA80B 20 625L80 625 825 230 6500 900 1100 1650 100 425 w w w. l i t t e l f u s e . c o m Varistor Products Line Voltage Operation, Radial Lead LA Varistor Series (Continued) MAXIMUM RATING (85 oC) CONTINUOUS PART NUMBER MODEL SIZE DISC DIA. (mm) DEVICE MODEL NUMBER BRANDING SPECIFICATIONS (25 oC) TRANSIENT VRMS VDC ENERGY 10 x 1000µs PEAK CURRENT 8 x 20µs VM(AC) VM(DC) WTM ITM (V) (V) (J) (A) VARISTOR VOLTAGE AT 1mA DC TEST CURRENT VNOM MAX VNOM MIN (V) MAXIMUM CLAMPING VOLTAGE 8 x 20µs TYPICAL CAPACITANCE f = 1MHz VC IPK C (V) (A) (pF) V660LA10 10 660L 660 850 70 2500 940 1250 1650 25 70 V660LA50A 14 660L50 660 850 140 4500 940 1250 1650 50 200 V660LA100B 20 660L100 660 850 250 6500 940 1250 1650 100 400 V1000LA80A 14 1000L80 1000 1200 220 4500 1425 1800 2700 50 130 V1000LA160B 20 1000L160 1000 1200 360 6500 1425 1600 2420 100 250 NOTE: Average power dissipation of transients not to exceed 0.25W, 0.4W, 0.6W or 1W for model sizes 7mm, 10mm, 14mm and 20mm, respectively. Power Dissipation Ratings 100 PERCENT OF RATED VALUE Should transients occur in rapid succession, the average power dissipation is the energy (watt-seconds) per pulse times the number of pulses per second. The power so developed must be within the specifications shown on the Device Ratings and Specifications table for the specific device.The operating values of a MOV need to be derated at high temperatures as shown in Figure 1. Because varistors only dissipate a relatively small amount of average power they are not suitable for repetitive applications that involve substantial amounts of average power dissipation. 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 150 AMBIENT TEMPERATURE ( oC) PERCENT OF PEAK VALUE FIGURE 1. CURRENT, ENERGY AND POWER DERATING CURVE 100 O1 = Virtual Origin of Wave T = Time From 10% to 90% of Peak T1 = Virtual Front time = 1.25 • t T2 = Virtual Time to Half Value (Impulse Duration) Example: For an 8/20µs Current Waveform: 8µs = T1 = Virtual Front Time 20µs = T2 = Virtual Time to Half Value 90 50 10 O1 T TIME T1 T2 FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM w w w. l i t t e l f u s e . c o m 2 VARISTOR PRODUCTS Device Ratings and Specifications 53 Next Previous Varistor Products Line Voltage Operation, Radial Lead LA Varistor Series Transient V-I Characteristics Curves 4,000 6,000 5,000 MAXIMUM CLAMPINGVOLTAGE MODEL SIZE 7mm 130 TO 300VM(AC) RATING TA = -55oC TO 85oC MAXIMUM PEAKVOLTS (V) 3,000 2,000 2,000 V275LA2 V250LA2 1,000 900 800 700 600 500 400 MAXIMUM CLAMPINGVOLTAGE MODEL SIZE 7mm 130 TO 300VM(AC) RATING TA = -55oC TO 85oC V300LA4 V275LA4 V250LA4 V230LA4 3,000 MAXIMUM PEAKVOLTS (V) 4,000 V300LA2 V150LA1 1,000 900 800 700 600 500 400 300 V175LA2 V150LA2 V140LA2 V130LA2 200 300 V130LA1 200 10-3 10-2 10-1 100 101 102 PEAK AMPERES (A) 103 FIGURE 3. CLAMPING VOLTAGE FOR V130LA1 - V300LA2 6,000 5,000 MAXIMUM CLAMPINGVOLTAGE 5,000 MODEL SIZE 7mm 320 TO 480VM(AC) RATING TA = -55oC TO 85oC 3,000 V460LA7 V480LA7 1,000 V420LA7 V385LA7 V320LA7 10-1 100 101 PEAK AMPERES (A) 102 103 MAXIMUM PEAKVOLTS (V) FIGURE 5. CLAMPING VOLTAGE FOR V320LA7 - V480LA7 2,000 V625LA10 V660LA10 V300LA10 V320LA10 V575LA10 V510LA10 V480LA10 V385LA10 10-3 10-2 10-1 100 101 PEAK AMPERES (A) 102 103 104 FIGURE 7. CLAMPING VOLTAGE FOR V300LA10 - V660LA10 54 104 1,000 900 800 700 600 500 400 V275LA10 V250LA10 V230LA10 V420LA10 V175LA5 6,000 5,000 4,000 1,000 500 103 V150LA5 V140LA5 V130LA5 10-2 10-1 100 101 102 PEAK AMPERES (A) 103 104 FIGURE 6. CLAMPING VOLTAGE FOR V130LA5 - V420LA10 MAXIMUM CLAMPINGVOLTAGE 5,000 MODEL SIZE 10mm 300 TO 660VM(AC) RATING TA = -55oC TO 85oC 3,000 2,000 200 10-3 104 MAXIMUM PEAKVOLTS (V) 10-2 100 101 102 PEAK AMPERES (A) 300 500 10-3 10-1 MAXIMUM CLAMPINGVOLTAGE MODEL SIZE 10mm 130 TO 420VM(AC) RATING TA = -55oC TO 85oC 4,000 3,000 2,000 10-2 FIGURE 4. CLAMPING VOLTAGE FOR V130LA2 - V300LA4 MAXIMUM PEAKVOLTS (V) MAXIMUM PEAKVOLTS (V) 100 10-3 104 MAXIMUM CLAMPINGVOLTAGE MODEL SIZE 14mm 130 TO 320VM(AC) RATING TA = -55oC TO 85oC 3,000 2,000 V300LA20A V320LA20A 1,000 900 800 700 600 500 400 V275LA20A V250LA20A V230LA20A V175LA10A V150LA10A V140LA10A V130LA10A 300 200 10-3 10-2 10-1 100 101 102 PEAK AMPERES (A) 103 104 FIGURE 8. CLAMPING VOLTAGE FOR V130LA10A - V320LA20A w w w. l i t t e l f u s e . c o m Next Previous Varistor Products Line Voltage Operation, Radial Lead LA Varistor Series Transient V-I Characteristics Curves (Continued) 2,000 1,000 700 V575LA40A V510LA40A V480LA40A V420LA20A V385LA20A 300 10-4 10-3 10-2 10-1 100 101 PEAK AMPERES (A) 102 103 V150LA20A V130LA20A 10-2 10-1 100 101 102 PEAK AMPERES (A) 103 104 3,000 MAXIMUM CLAMPINGVOLTAGE MODEL SIZE 20mm M(AC) RATING 2,000 140 TO 230V TA = -55oC TO 85oC MAXIMUM PEAKVOLTS (V) MAXIMUM PEAKVOLTS (V) V175LA20A FIGURE 10. CLAMPING VOLTAGE FOR V130LA20A - V275LA40A MAXIMUM CLAMPINGVOLTAGE MODEL SIZE 20mm 2,000 130 TO 275VM(AC) RATING TA = -55oC TO 85oC 300 V250LA40A 200 10-3 104 3,000 400 V275LA40A 400 300 FIGURE 9. CLAMPING VOLTAGE FOR V385LA20A V1000LA80A 1,000 900 800 700 600 500 2 1,000 900 800 700 600 500 VARISTOR PRODUCTS V660LA50A 2,000 V625LA40A 500 MAXIMUM CLAMPINGVOLTAGE MODEL SIZE 20mm 130 TO 275VM(AC) RATING TA = -55oC TO 85oC V1000LA80A MAXIMUM PEAKVOLTS (V) MAXIMUM PEAKVOLTS (V) 3,000 5,000 MAXIMUM CLAMPINGVOLTAGE MODEL SIZE 14mm 385 TO 1000VM(AC) RATING TA = -55oC TO 85oC 3,000 V275LA40B V250LA40B V150LA20B 1,000 V230LA40A 500 V140LA20A 300 V130LA20B 200 10-3 10-2 10-1 100 101 102 PEAK AMPERES (A) 103 200 104 FIGURE 11. CLAMPING VOLTAGE FOR V130LA20B - V275LA40B 10-3 10-2 10-1 100 101 102 PEAK AMPERES (A) 103 104 FI GURE 12. CLAMPING VOLTAGE FOR V140LA20A - V230LA40A MAXIMUM PEAKVOLTS (V) 5,000 3,000 2,000 MAXIMUM CLAMPINGVOLTAGE MODEL SIZE 20mm 300 TO 1000VM(AC) RATING TA = -55oC TO 85oC V1000LA160B V625LA80B V660LA100B V575LA80B V510LA80B V480LA80B 1,000 500 V420LA40B V385LA40B V320LA40B V300LA40A 10-3 10-2 10-1 100 101 102 PEAK AMPERES (A) 103 104 FIGURE 13. CLAMPING VOLTAGE FOR V300LA40A - V1000LA160B w w w. l i t t e l f u s e . c o m 55 Next Previous Varistor Products Line Voltage Operation, Radial Lead LA Varistor Series Pulse Rating Curves 2,000 5,000 1 MODEL SIZE 7mm V130LA1 - V480LA7 1,000 200 102 100 50 20 10 INDEFINITE 5 102 3 10 104 105 106 10 500 200 100 50 20 INDEFINITE 10 5 2 1 20 100 1,000 IMPULSE DURATION ( µs) 5,000 1 2,000 2 1,000 10 MODEL SIZE 14mm V130LA10A - V320LA20A 102 3 10 104 105 106 500 200 100 50 20 INDEFINITE 10 100 1,000 IMPULSE DURATION ( µs) 1 2,000 2 1,000 10 MODEL SIZE 14mm V385LA20A - V1000LA80A 102 3 10 104 105 106 500 200 100 50 20 INDEFINITE 10 5 5 2 20 100 1,000 IMPULSE DURATION ( µs) 2 20 10,000 100 1,000 IMPULSE DURATION ( µs) FIGURE 16. SURGE CURRENT RATING CURVES FOR V130LA10A - V320LA20A FIGURE 17. SURGE CURRENT RATING CURVES FOR V385LA20A - V1000LA80A 10,000 10,000 2 10 2,000 1,000 500 MODEL SIZE 20mm V130LA20A - V320LA40B 102 3 10 104 105 106 2 10 2,000 200 100 50 20 INDEFINITE 10 1 5,000 SURGE CURRENT (A) 1 5,000 SURGE CURRENT (A) 10,000 FIGURE 15. SURGE CURRENT RATING CURVES FOR V130LA5 - V660LA10 SURGE CURRENT (A) 5,000 2 20 10,000 FIGURE 14. SURGE CURRENT RATING CURVES FOR V130LA1 - V480LA7 SURGE CURRENT (A) 2 1,000 103 104 105 106 10 SURGE CURRENT (A) SURGE CURRENT (A) 500 MODEL SIZE 10mm V130LA5 - V660LA10 1 2,000 2 1,000 500 MODEL SIZE 20mm V385LA40B - V1000LA160B 102 3 10 104 105 106 200 100 50 20 INDEFINITE 10 5 5 2 2 1 10,000 1 20 100 1,000 IMPULSE DURATION ( µs) 10,000 FIGURE 18. SURGE CURRENT RATING CURVES FOR V130LA20A - V320LA40B 20 100 1,000 IMPULSE DURATION ( µs) 10,000 FIGURE 19. SURGE CURRENT RATING CURVES FOR V385LA40B - V1000LA160B NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than ±10% could result. This type of shift, which normally results in a decrease of VN(DC), may result in the device not meeting the original published specifications, but does not prevent the device from continuing to function, and to provide ample protection. 56 w w w. l i t t e l f u s e . c o m Next Previous Varistor Products Line Voltage Operation, Radial Lead LA Varistor Series Tape and Reel Specifications Tape and Reel Data • Conforms to ANSI and EIA specifications • Can be supplied to IEC Publication 286-2 2 VARISTOR PRODUCTS • Radial devices on tape are supplied with crimped leads, straight leads, or under-crimped leads MODEL SIZE SYMBOL PARAMETER 7mm 10mm 14mm 12.7 ± 1.0 25.4 ± 1.0 25.4 ± 1.0 25.4 ± 1.0 20mm 12.7 ± 0.2 P Pitch of Component P0 Feed Hole Pitch 12.7 ± 0.2 12.7 ± 0.2 12.7 ± 0.2 P1 Feed Hole Center to Pitch 3.85 ± 0.7 2.6 ± 0.7 2.6 ± 0.7 2.6 ± 0.7 P2 Hole Center to Component Center 6.35 ± 0.7 6.35 ± 0.7 6.35 ± 0.7 6.35 ± 0.7 F Lead to Lead Distance 5.0 ± 0.8 7.5 ± 0.8 7.5 ± 0.8 7.5 ± 0.8 h Component Alignment 2.0 Max 2.0 Max 2.0 Max 2.0 Max 18.0 + 1.0 18.0 - 0.5 18.0 + 1.0 18.0 - 0.5 18.0 + 1.0 18.0 - 0.5 18.0 + 1.0 18.0 - 0.5 W Tape Width W0 Hold Down Tape Width 6.0 ± 0.3 6.0 ± 0.3 6.0 ± 0.3 12.0 ± 0.3 W1 Hole Position 9.0 + 0.75 9.0 - 0.50 9.0 + 0.75 9.0 - 0.50 9.0 + 0.75 9.0 - 0.50 9.0 + 0.75 9.0 - 0.50 0.5 Max 0.5 Max 0.5 Max 0.5 Max H Height from Tape Center to Component Base 18.0 + 2.0 18.0 - 0.0 18.0 + 2.0 18.0 - 0.0 18.0 + 2.0 18.0 - 0.0 18.0 + 2.0 18.0 - 0.0 W2 Hold Down Tape Position H0 Seating Plane Height 16.0 ± 0.5 16.0 ± 0.5 16.0 ± 0.5 16.0 ± 0.5 H1 Component Height 32.0 Max 36.0 Max 40.0 Max 46.5 Max D0 Feed Hole Diameter 4.0 ± 0.2 4.0 ± 0.2 4.0 ± 0.2 4.0 ± 0.2 t Total Tape Thickness 0.7 ± 0.2 0.7 ± 0.2 0.7 ± 0.2 0.7 ± 0.2 Length of Clipped Lead 11.0 Max 11.0 Max 11.0 Max 11.0 Max Component Alignment 3o Max 1.00mm 3o Max 1.00mm 3o Max 1.00mm 3o Max L p NOTE: Dimensions are in mm. w w w. l i t t e l f u s e . c o m 57 Varistor Products Line Voltage Operation, Radial Lead LA Varistor Series Tape and Reel Ordering Information Standard Bulk Pack Quantity Crimped leads are standard on LA types supplied in tape and reel and are denoted by the model letter “T”. Model letter “S” denotes straight leads and letter “U” denotes special under-crimped leads. STANDARD BULK PACK QUANTITY Example: STANDARD MODEL CRIMPED LEADS STRAIGHT LEADS UNDERCRIMPED LEADS V130LA2 V130LT2 V130LS2 V130LU2 VARISTOR VOLTAGE MODEL 7mm 10mm 14mm 130-275 1500 1000 700 500 300-460 1500 700 600 400 510-625 1500 700 500 400 VARISTOR MODEL SIZE 20mm VARISTOR MODEL SIZE 7mm 10mm 14mm MIN MAX MIN MAX MIN MAX MIN MAX V130LAV320LA - 12 (0.472) - 16 (0.630) - 20 (0.787) - 26.5 (1.043) V385LAV1000LA - 13 (0.0512) - 17 (0.689) - 20.5 (0.807) - 28 (1.102) flD All - 9 (0.354) - 12.5 (0.492) - 17 (0.669) - 23 (0.906) e All 6.5 (0.256) 8.5 (0.335) 6.5 (0.256) 8.5 (0.335) 6.5 (0.256) (Note 2) 8.5 (0.335) (Note 2) e1 V130LAV320LA 1.5 (0.059) 3.5 (0.138) 1.5 (0.059) 3.5 (0.138) 1.5 (0.059) 3.5 (0.138) 1.5 (0.059) 3.5 (0.138) V385AV1000LA 2.5 (0.098) 5.5 (0.217) 2.5 (0.098) 5.5 (0.217) 2.5 (0.098) 5.5 (0.217) 2.5 (0.098) 5.5 (0.217) V130LAV320LA - 5.6 (0.220) - 5.6 (0.220) - 5.6 (0.220) - 5.6 (0.220) V385LAV660LA - 7.5 (0.287) - 7.5 (0.287) - 7.5 (0.287) - 7.5 (0.287) V1000LA - - - - - 10.8 (0.425) - 10.8 (0.425) All (Note 3) 0.585 (0.023) 0.685 (0.027) 0.76 (0.030) 0.86 (0.034) 0.76 (0.030) 0.86 (0.034) 0.76 (0.030) (Note 2) 0.86 (0.034) (Note 2) SYMBOL A E flb 4 (0.157) 6 (0.236) NOTES: 1. Dimensions in millimeters, inches in parentheses. 2. 10mm (9mm min, 11mm Max) ALSO AVAILABLE; See Additional Lead Style Options 3. 1000V parts supplied with lead wire of diameter 1.00 – 0.05 (0.039 – 0.002). 58 20mm VOLTAGE MODEL w w w. l i t t e l f u s e . c o m Next Previous Varistor Products Line Voltage Operation, Radial Lead LA Varistor Series Additional Lead Style Options Radial lead types can be supplied with combination preformed crimp and trimmed leads. This option is supplied to the dimensions shown. 2 *Seating plane interpretation per IEC-717 VARISTOR PRODUCTS CRIMPED AND TRIMMED LEAD VARISTOR MODEL SIZE 7mm SYMBOL MIN 14mm 20mm MAX MIN MAX MIN MAX MIN MAX 15 (0.591) - 19.5 (0.768) - 22.5 (0.886) - 29.0 (1.142) 2.41 (0.095) 4.69 (0.185) 2.41 (0.095) 4.69 (0.185) 2.41 (0.095) 4.69 (0.185) 2.41 (0.095) 4.69 (0.185) A LTRIM 10mm - NOTE: Dimensions in millimeters, inches in parentheses. To order this crimped and trimmed lead style, standard radial type model numbers are changed by replacing the model letter “A” with “C”. Example: • For 10/±1mm lead spacing on 20mm diameter models only; append standard model numbers by adding “X10”. Example: STANDARD CATALOG MODEL ORDER AS: V130LA20A V130LA20AX10 • For crimped leads without trimming and any variations to the above, contact Littelfuse. Ordering Information LA series Varistors are shipped standard in bulk pack with straight leads and lead spacing outlined in the package dimensions on page 4-13. Contact your Littelfuse sales representative to discuss the non-standard options outlined below. V XXX LA XX X VARISTOR CLAMP VOLTAGE VARIANT (Where Applicable) RELATIVE ENERGY INDICATOR (One or Two Digits) VM(AC) 130V to 1,000V SERIES DESIGNATOR/ LEAD STYLE DESIGNATOR LC = Crimped and Clipped LS = Straight LT = Crimped LU = Under Crimped w w w. l i t t e l f u s e . c o m 59