Metal-Oxide Varistors (MOVs) Thermally Protected Varistors > SMOV®34S Varistor Series SMOV®34S Varistor Series RoHS Description The Littelfuse SMOV®34S thermally protected varistor is a self-protected device. It consists of a 34mm square varistor with an integral thermal disconnect designed to open in the event of overheating due to abnormal overvoltage as outlined in UL1449. The SMOV® helps facilitate SPD module compliance to UL1449 and offers quick thermal response due to the close proximity of the integrated thermal element to the MOV body. This configuration also offers lower inductance than most discreet solutions resulting in improved clamping performance to fast over voltage transients. The device has a separate micro-switch, which can be used to indicate that the MOV has been disconnected from the circuit. This separate switch makes the monitoring circuitry completely isolated from the main power which ensures indicator circuit safety and simplifies the customers circuit design. Agency Approvals Agency Agency Approval Agency File Number Features UL1449 E320116 • Maximum single • Recognized to UL 1449. surge capability 40 kA, • Lead-Free and RoHS 8/20 waveshape. compliant. • Nominal Discharge • Integrated micro-switch Additional Information Current Value: 20kA. for indication • Intermediate current circuitry/design. rating: 50A/150A. • -45°C to +75°C operating temperature. Datasheet Resources Samples Applications • SPD applications • AC/DC distribution • T/Data center • Power supplier • Telecommunication Absolute Maximum Ratings • For ratings of individual members of a series, see Device Ratings and Specifications chart SMOV34S S Varistor Series Units Continous: Steady State Applied Voltage: DC Voltage Range (VM(DC)) 150 to 970 V AC Voltage Range (V ) 115 to 750 V M(AC)RMS Transient: Non-Repetitive Surge Current, 8/20µs Waveform (I ) 40,000 A TM Non-Repetitive Energy Capability, 2ms Waveform (W ) 280 to 1200 J TM Operating Ambient Temperature Range (T ) -45 to +75 °C A Storage Temperature Range (T ) -45 to +85 °C STG Hi-Pot Encapsulation (Isolation Voltage Capability) 2500 V Isolation Voltage Capability (when the thermal disconnect opens) 1500 V Housing Insulation Resistance >1,000 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. © 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17

Metal-Oxide Varistors (MOVs) Thermally Protected Varistors > SMOV®34S Varistor Series Device Ratings & Specifications Maximum Rating (75°C) Specifications (25 °C) Continuous Transient Varistor Maximum Typical NuPmarbt e r VAoClts VDoClts En2emrgsy CSuPuerrragekne t DNisocmhainrgale V1ComlutAarrg Teeen statt CVl8ao/m2lt0apμgisneg Caf p=a 1cMitaHnzce Current 8/20μs V I V V M (AC) V W TM In N(DC) N(DC) Vc I C M(DC) TM 1 × Pulse Min Max PK RMS (V) (V) (J) (A) (A) (V) (V) (A) (pF) SMOV34S111MP 115 150 280 40000 20000 162 198 305 200 11500 SMOV34S111NP SMOV34S131MP 130 175 310 40000 20000 184.5 225.5 345 200 10000 SMOV34S131NP SMOV34S151MP 150 200 360 40000 20000 216 264 405 200 8000 SMOV34S151NP SMOV34S181MP 180 240 400 40000 20000 256 312 488 200 6800 SMOV34S181NP SMOV34S251MP 250 320 490 40000 20000 351 429 650 200 5000 SMOV34S251NP SMOV34S271MP 275 350 550 40000 20000 387 473 730 200 4500 SMOV34S271NP SMOV34S301MP 300 385 590 40000 20000 432 528 780 200 4050 SMOV34S301NP SMOV34S321MP 320 420 640 40000 20000 459 561 830 200 3800 SMOV34S321NP SMOV34S421MP 420 560 910 40000 20000 612 748 1130 200 3000 SMOV34S421NP SMOV34S461MP 460 610 960 40000 10000 643.5 786.5 1188 200 2800 SMOV34S461NP SMOV34S511MP 510 675 960 40000 10000 738 902 1350 200 2500 SMOV34S511NP SMOV34S551MP 550 700 965 40000 10000 770 939 1415 200 2250 SMOV34S551NP SMOV34S621MP 620 800 1010 40000 10000 900 1100 1625 200 2100 SMOV34S621NP SMOV34S751MP 750 970 1200 40000 10000 1080 1320 2000 200 1800 SMOV34S751NP Average power dissipation of transients should not exceed 2.0 watts Same ratings and specifications apply to Non Isolated Monitored Switch alternative design. Replace "M" with "N" in the part number. e.g.: SMOV34S111NP. Refer to Part Number System at the end of this document. © 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17

Metal-Oxide Varistors (MOVs) Thermally Protected Varistors > SMOV®34S Varistor Series Thermal Characteristics Peak Current & Energy Derating Curve 10 100 E U80 L A Typical D V E60 A) 10 A AT nt ( 1 5 A F R Curre 2.5 A NT O40 0.5 A E C R20 E P 0 -45 50 60 70 80 90 100 110 120 130 0.1 Figure 2 AMBIENT TEMPERATURE (ºC) 1 10 100 Figure 1 Time (secs) For applications exceeding 75ºC ambient temperature, the peak surge current and energy ratings must be reduced as shown. Pulse Rating Curve 50,000 1 20,000 2 15 10,000 T (A) 52,,000000 110023 105106 REN 1,000 104 UR 500 C E 200 G UR 100 S 50 20 INDEFINITE 10 20 100 1,000 10,000 Figure 3 IMPULSE DURATION (µs) Transient V-I Characteristic Curve 10000 Maximum Clamping Voltage TA = -45 C to 75C V751 Voltage - V661 V681 VOLTS V571 V551 V511 1000 V481 V111 V141V131 V441 V151 V421 100 1mA 10mA 100mA 1A 10A 100A  1000A 10000A 100000A Figure 4 Current - AMPS V391 V351 V331V321 V301V271 V251V201V181 © 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17

Metal-Oxide Varistors (MOVs) Thermally Protected Varistors > SMOV®34S Varistor Series Wave Solder Profile Because the SMOV®34S varistors contain a thermal protection recommended to heat–sink the leads of the device. Secondly, device, care must be taken when soldering the devices into place. wave–soldering: It is critically important that all preheat stage and Two soldering methods are possible. Firstly, hand soldering: It is the solder bath temperatures are rigidly controlled. Non Lead–free Profile Lead–free Profile 300 300 Maximum Wave 260C Maximum Wave 240C 250 250 C) C) E (º 200 E (º 200 R R U U T T A 150 A 150 R R E E P P M 100 M 100 E E T T 50 50 0 0 0 0.5 1 1.5 2 2.5 3 3.5 4 0 0.5 1 1.5 2 2.5 3 3.5 4 Figure 5 TIME(MINUTES) Figure 6 TIME(MINUTES) Physical Specifications Environmental Specifications Lead Material Tin–plated Copper Operating/Storage -45°C to +75°C/ Temperature -45°C to +85°C Soldering Solderability per MIL–STD–202, Characteristics Method 208 Humidity Aging +75°C, 85% RH, 1000 hours +/-10% voltage Cured, flame retardant epoxy polymer Insulating Material +75°C to -40°C 5 times meets UL94V–0 requirements. Thermal Shock +/-10% voltage Marked with LF, part identifier, and Device Labeling date code Solvent Resistance MIL–STD–202, Method 215 Moisture Sensitivity Level 1, J-STD-020 Part Numbering System Part Marking System SMOV 34 S 321 N P Xxxxx UL Recognized Component Mark DEVICE FAMILY Littelfuse Thermally Self Protected MOV Production Site Code DISC SIZE (mm) Littelfuse Mark LF9 34mm Part Number SMOV34S321MP CERAMIC SHAPE Production Date Dode S: Square (Year and Week) 1148 VM(AC)RMS 115V to 750V M:With Isolated Monitored Switch N: Non Isolated Monitored Switch Design P: Lead-Free and RoHS compliant Option Codes © 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17

Metal-Oxide Varistors (MOVs) Thermally Protected Varistors > SMOV®34S Varistor Series Device Dimension Lead Configuration 41Max 20Max Galvanic isolation P1 LF9 LF9 44.5Max SMOV31144S8321MP LF9 P1 SGMaOlvV1aX2nX0iSc9 3is21oMlaPtion dTihsecromnnael ct (SN1o rOmNal Close) SMOVXXS321MP S3 Common 10Min 10Min 1.4±0.2 1.21±200.39 dTihsecromnna3el. 6c±t0.3 P2 S2 (SSN13o rOSmN1al CloPse1) MOV (SN2o rOmFaFl open) 6.0±0.2 3*0.6±0.2 0.3±0.2 0.5±0.2 6.0±0.2 S3 Common MOV S2 S3 S1 P1 P2 5 21.5±0.2 P2 S2 S3 S1 P1 P2 (SN2o rOmFaFl open) Primary side Secondary side 0. ± 0 11. S2 S3 S1 P1 P2 P2 Primary side Secondary side 3 0. 6.5±2.2 ± 5 2. Galvanic isolation P1 Application Example * LED is off when the product is normal(S1,S3 connected), LED is on when the product disconect opens(switch change status; S2,S3 connected as shown by dotted line ). uit Thermal c Galvanic isolation disconnect S1 ON R LED d Cir P1 e * LED is off when the product is normal(S1,S3 connected), S3 Common ct LED is on when the product disconect opens(switch change e status; S2,S3 connected as shown by dMotOtedV line ). uit rot dTihsecromnnael ct S1 ON R LEDP2 S2d Circ OFNdeoFptee:n EdXs AoMn PcuLsEto OmNeLr Yin -d Cicoantinoenc ctiiorcnu tito a Sn2d- Sca3n a vnadr yS. 1-S3 To P S3 Common Primary side Secondactery side e MOV ot r P S2 OFF Note: EXAMPLE ONLY - Connection to S2-S3 and S1-S3 To depends on customer indication circuit and can vary. P2 Primary side Secondary side Switch Specification Dialectric Strength SMOV Switch Voltage DC Current (Amps) Contact Resistance Max. Insulation Resistance Min. 0.5mA/Minute Switch 12V 0.1A 70mΩ 100MΩ 500VAC Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics. © 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: L ittelfuse: SMOV34S111MP SMOV34S131MP SMOV34S151MP SMOV34S181MP SMOV34S251MP SMOV34S271MP SMOV34S301MP SMOV34S321MP SMOV34S421MP SMOV34S461MP SMOV34S511MP SMOV34S551MP SMOV34S751MP SMOV34S271NP SMOV34S321NP SMOV34S621NP SMOV34S751NP SMOV34S621MP SMOV34S111NP SMOV34S181NP SMOV34S301NP SMOV34S421NP SMOV34S511NP SMOV34S551NP SMOV34S151NP SMOV34S131NP SMOV34S251NP SMOV34S461NP