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| Varistor Products Axial Lead MA Varistor Series The MA Series of transient surge suppressors are axial-lead metal-oxide varistors (MOVs) for use in a wide variety of board level industrial and commercial electronic equipment. They are intended to protect components and signal/data lines from low energy transients where the small axial lead package is required. The MA Series is offered with standard (S suffix) or tightened (B suffix) clamping voltage. See MA Series Device Ratings and Specifications table for part number and brand information. 2 VARISTOR PRODUCTS 127 Features * 3mm Diameter Disc Size * Small Axial Lead Package * Wide Operating Voltage Range VM(AC)RMS. . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .9V to 264V VM(DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13V to 365V * Available in Tape and Reel or Bulk Packaging * No Derating Up to 85oC Ambient w w w. l i t t e l f u s e . c o m Varistor Products Axial Lead MA Varistor Series Absolute Maximum Ratings For ratings of individual members of a series, see Device Ratings and Specifications chart Continuous: MA SERIES Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 to 264 DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 to 365 Transient: Peak Pulse Current (ITM) For 8/20s Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 to 100 Single Pulse Energy Range For 10/1000s Current Wave (WTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.06 to 1.7 Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85 Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125 Temperature Coefficient (V) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01 Hi-Pot Encapsulation (Isolation Voltage Capability) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 (Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 Insulation Resistance UNITS V V A J C O C %/OC V M O 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 RATINGS (85 oC) CONTINUOUS TRANSIENT ENERGY (10/1000s) WTM (J) 0.06 0.07 0.06 0.09 0.10 0.09 0.10 0.11 0.10 0.13 0.15 0.14 0.16 0.18 0.17 0.19 0.21 0.19 0.23 0.25 0.23 0.26 0.30 0.27 0.33 0.37 0.34 PEAK CURRENT (8/20s) ITM (A) 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 VARISTOR VOLTAGE AT 1mA DC TEST CURRENT MIN (V) 14 15 15 16 19 19 21 24 24 26 29.5 29.5 31 35 35 37 42 42 44 50 50 54 61 61 65 73 73 VN(DC) (V) 18 18 18 22 22 22 27 27 27 33 33 33 39 39 39 47 47 47 56 56 56 68 68 68 82 82 82 MAX (V) 23 21 21 28 26 26 34 31 31 40 36.5 36.5 47 43 43 57 52 52 68 62 62 82 75 75 99 91 91 SPECIFICATIONS (25 oC) MAX CLAMPING VOLTAGE VC AT 2.0A (8/20s) VC (V) 49 44 49 55 51 55 67 59 67 73 67 73 86 79 86 99 90 99 117 108 117 138 127 138 163 150 163 VRMS PART NUMBER V18MA1A V18MA1B V18MA1S V22MA1A V22MA1B V22MA1S V27MA1A V27MA1B V27MA1S V33MA1A V33MA1B V33MA1S V39MA2A V39MA2B V39MA2S V47MA2A V47MA2B V47MA2S V56MA2A V56MA2B V56MA2S V68MA3A V68MA3B V68MA3S V82MA3A V82MA3B V82MA3S VM(AC) BRAND 18A 18B 18S 22A 22B 22S 27A 27B 27S 33A 33B 33S 39A 39B 39S 47A 47B 47S 56A 56B 56S 68A 68B 68S 82A 82B 82S (V) 9 10 10 10 14 14 13 17 17 18 20 20 22 25 25 27 30 30 32 35 35 38 40 40 45 50 50 VDC VM(DC) (V) 13 14 14 15 18 18 19 22 22 23 26 26 28 31 31 34 38 38 40 45 45 48 56 56 60 66 66 TYPICAL CAPACITANCE f = 1MHz (pF) 550 550 550 410 410 410 370 370 370 300 300 300 250 250 250 210 210 210 180 180 180 150 150 150 120 120 120 128 w w w. l i t t e l f u s e . c o m Varistor Products Axial Lead MA Varistor Series Device Ratings and Specifications (Continued) MAXIMUM RATINGS (85 oC) CONTINUOUS TRANSIENT ENERGY (10/1000s) WTM (J) 0.40 0.45 0.42 0.40 0.50 0.46 0.50 0.60 0.60 0.70 0.80 0.90 0.90 1.00 1.00 1.10 1.20 1.30 1.50 1.70 PEAK CURRENT (8/20s) ITM (A) 40 40 40 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 SPECIFICATIONS (25 oC) MAX CLAMPING VOLTAGE VC AT 2.0A (8/20s) VC (V) 200 185 200 220 205 220 255 240 310 290 380 360 460 440 570 540 670 640 740 700 VRMS PART NUMBER V100MA4A V100MA4B V100MA4S V120MA1A V120MA2B V120MA2S V150MA1A V150MA2B V180MA1A V180MA3B V220MA2A V220MA4B V270MA2A V270MA4B V330MA2A V330MA5B V390MA3A V390MA6B V430MA3A V430MA7B VM(AC) BRAND 100 101 102 120 121 122 150 151 180 181 220 221 270 271 330 331 390 391 430 431 (V) 57 60 60 72 75 75 88 92 105 110 132 138 163 171 188 200 234 242 253 264 VDC VM(DC) (V) 72 81 81 97 101 101 121 127 144 152 181 191 224 235 257 274 322 334 349 365 VARISTOR VOLTAGE AT 1mA DC TEST CURRENT MIN (V) 80 90 90 102 108 108 127 135 153 162 187 198 229 243 280 297 331 351 365 387 VN(DC) (V) 100 100 100 120 120 120 150 150 180 180 220 220 270 270 330 330 390 390 430 430 MAX (V) 120 110 110 138 132 132 173 165 207 198 253 242 311 297 380 363 449 429 495 473 TYPICAL CAPACITANCE f = 1MHz (pF) 100 100 100 40 40 40 32 32 27 27 21 21 17 17 14 14 12 12 11 11 2 VARISTOR PRODUCTS NOTE: Average power dissipation of transients not to exceed 200mW. Power Dissipation Ratings PERCENT OF RATED VALUE Should transients occur in rapid succession, the average power dissipation required is simply 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. Furthermore, the operating values need to be derated at high temperatures as shown in Figure 1. Because varistors can only dissipate a relatively small amount of average power they are, therefore, not suitable for repetitive applications that involve substantial amounts of average power dissipation. 100 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) FIGURE 1. CURRENT, ENERGY AND POWER DERATING CURVE w w w. l i t t e l f u s e . c o m 129 Varistor Products Axial Lead MA Varistor Series PERCENT OF PEAK VALUE 100 90 50 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 8/20s Current Waveform: 8s = T1 = Virtual Front Time 20s = T2 = Virtual Time to Half Value 10 O1 T T1 T2 TIME FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM Transient V-I Characteristics Curves 800 600 400 MAXIMUM PEAK VOLTS (V) 300 200 150 100 80 60 40 30 20 10-2 10-1 V47MA2A/S V39MA2A/S V33MA1A/S V27MA1A/S V22MA1A/S V18MA1A/S 100 PEAK AMPERES (A) 101 102 MAX CLAMPING VOLTAGE DISC SIZE 3mm 18 TO 100VN(DC) RATING TA = -55oC TO 85oC V100MA4A/S V82MA3A/S V68MA3A/S V56MA2A/S 4,000 MAX CLAMPING VOLTAGE DISC SIZE 3mm 120 TO 430VN(DC) RATING TA = -55oC TO 85oC V430MA3A V390MA3A V330MA2A V270MA2A V220MA2A 2,000 MAXIMUM PEAK VOLTS (V) 1,500 1,000 800 600 400 200 V180MA1A V150MA1A V120MA1A/S 100 10-2 10-1 100 PEAK AMPERES (A) 101 102 FIGURE 3. CLAMPING VOLTAGE FOR V18MA1A/S - V100MA4A/S FI GURE 4. CLAMPING VOLTAGE FOR V120MA1A/S V430MA3A 600 500 400 300 MAXIMUM PEAK VOLTS (V) 200 MAXIMUM PEAK VOLTS (V) MAX CLAMPING VOLTAGE DISC SIZE 3mm 18 TO 100VN(DC) RATING TA = -55oC TO 85oC 4,000 3,000 V100MA4B V82MA3B V68MA3B 2,000 MAXIMUM CLAMPINGVOLTAGE DISC SIZE 3mm 120 TO 430VN(DC) RATING TA = -55oC TO 85oC V430MA7B V390MA6B V330MA5B V270MA4B V220MA4B V180MA3B V150MA2B V120MA2B 100 90 80 70 60 50 40 30 20 10-3 V56MA2B V47MA2B V39MA2B V33MA1B V27MA1B V22MA1B V18MA1B 10-2 10-1 100 101 PEAK AMPERES (A) 102 103 1,000 900 800 700 600 500 400 300 200 100 10-3 10-2 10-1 100 101 PEAK AMPERES (A) 102 103 FIGURE 5. CLAMPING VOLTAGE FOR V18MA1B - V100MA4B 130 FIGURE 6. CLAMPING VOLTAGE FOR V120MA2B - V430MA7B w w w. l i t t e l f u s e . c o m Varistor Products Axial Lead MA Varistor Series Pulse Rating Curves 50 20 10 SURGE CURRENT (A) 102 103 104 SURGE CURRENT (A) 10 5 2 1 0.5 0.2 0.1 20 INDEFINITE 0.2 0.1 100 1,000 IMPULSE DURA TION ( s) 10,000 20 100 1,000 IMPULSE DURA TION ( s) 10,000 105 106 20 10 5 2 1 0.5 INDEFINITE 1 2 100 DISC SIZE 3mm V18MA1A - V100MA4B 50 2 10 102 1 DISC SIZE 3mm V120MA1A - V430MA7B 103 104 105 106 2 VARISTOR PRODUCTS FIGURE 7. SURGE CURRENT RATING CURVES FOR V18MA SERIES - V100MA SERIES FIGURE 8. SURGE CURRENT RATING CURVES FOR V120MA SERIES - V430MA SERIES 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 it does not prevent the device from continuing to function, and to provide ample protection. Mechanical Dimensions Tape and Reel Specification H1 = H2 0.040 0.063 MAX H1 0.0980.177 0.1350.145 0.020.023 H2 0.063 MAX INCHES SYMBOL Ob OD G H L MIN 0.024 0.135 0.098 0.118 1.130 MAX 0.026 0.177 0.177 0.236 1.220 MILLIMETERS MIN 0.61 3.43 3.43 3.0 28.70 MAX 0.66 4.5 4.5 6.0 31.0 0.1180.236 0.080 MAX 0.200 0.020 Typical Weight = 25g Ordering Information V XXX MA XX VARISTO R ENERGY/CLAMPING VOLTAGE VARIANT SERIES DESIGNATOR Bulk Use "MT" for Tape and Reel 0.240 0.040 2.062 0.059 2.681 MAX 0.240 0.040 * Conf orms to EIA Standard RS-296E VARISTOR VOLTAGE (VN at 1mA) w w w. l i t t e l f u s e . c o m 131 |
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