V250SM7 Littelfuse

Metal-Oxide Varistors (MOVs) Surface Mount Varistors > SM7 Series RoHS SM7 Varistor Series Description The Littelfuse SM7 is a plastic-encapsulated surface mount MOV in a PPS material molded package with tin-plated terminal which is fully qualified in lead free soldering and available for both reflow and wave soldering process. SM7 is constructed with 7mm varistor element disc. Its maximum operating ambient temperature is 85C with peak pulse current of 1200A. Features Electrical equivalent Good solderability to leaded types Available in tape Agency Approvals LA/ZA series and reel AC Voltage Rating Application of AC Agency Agency Approval Agency File Number 50 to 510VAC rms power meters UL1449 E320116 No De-Rating up Lead free and to 85C ambient RoHS compliant Additional Information Datasheet Resources Samples Absolute Maximum Ratings For ratings of individual members of a series, see Device Ratings and Specifications chart Continuous SM7 Series Units Steady State Applied Voltage: AC Voltage Range (V ) 50 to 510 V M(AC)RMS DC Voltage Range (V ) 68 to 675 V M(DC) Transients: Peak Pulse Current (I ) TM For 8/20s Current Wave (See Figure 2) 1200 A Single Pulse Energy Range For 10/1000s Current Wave (W ) 10 to 40 J TM O Operating Ambient Temperature Range (T ) -40 to +85 C A O Storage Temperature Range (T ) -40 to +125 C STG V O Temperature Coefficient (a ) of Clamping Voltage (V ) at Specified Test Current <0.01 %/ C C Hi-Pot Encapsulation (COATING Isolation Voltage Capability) 2500 V (Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301) COATING Insulation Resistance 1000 M 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. 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/09/20Metal-Oxide Varistors (MOVs) Surface Mount Varistors > SM7 Series SM7 Series Ratings & Specifications Maximum Rating (85C) Specifications (25C) Continuous Transient Varistor Voltage Maximum Clamping Typical at 1mA DC Voltage Capacitance Energy Peak Current Part V V RMS DC 10 x 1000s 8 x 20s Test Current 8 x 20 s f = 1MHz Number V V W I V Min V Max V I C M(AC) M(DC) TM TM NOM NOM C PK (V) (V) (J) (A) (V) (V) (V) (A) (pF) V50SM7 50 68 4 1200 73 91 135 10 700 V60SM7 60 81 5 1200 90 110 165 10 600 V115SM7 115 153 10 1200 162 198 300 10 200 V130SM7 130 175 11 1200 184 228 340 10 180 V140SM7 140 180 12 1200 198 242 360 10 160 V150SM7 150 200 13 1200 212 268 395 10 150 V175SM7 175 225 15 1200 247 303 455 10 130 V230SM7 230 300 20 1200 324 396 595 10 100 V250SM7 250 330 21 1200 354 429 650 10 90 V275SM7 275 369 23 1200 389 473 710 10 80 V300SM7 300 405 25 1200 420 517 775 10 70 V320SM7 320 420 25 1200 462 565 850 10 65 V385SM7 385 505 27 1200 558 682 1025 10 60 V420SM7 420 560 30 1200 610 748 1120 10 55 V460SM7 460 615 37 1200 640 790 1190 10 55 V480SM7 480 640 35 1200 670 825 1240 10 50 V510SM7 510 675 40 1200 735 910 1200 10 45 Product Dimensions Part Numbering System 11.40.3 8.30.3 V 275 SM7 3.6+/-0.3 for V50SM7-V60SM7 For V ARISTOR 6.0+/-0.3 for V115SM7 to V510SM7 V M(AC) 3.00.3 1.50.3 (Three digits -- 115V to 510V) SM7 SERIES All dimensions shown 6.5 3.5 in milimeters 13.1 Soldering Pad Layout 2020 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/09/20 0.3 max