Varistor Products Thermally Protected Varistors > SMOV34S Series RoHS SMOV34S Varistor Series The Littelfuse SMOV thermally protected varistor is a selfprotected 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 3rd edition. 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. Agency Approvals Agency Agency File Number E320116 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. Features t .BYJNVNTJOHMF surge capability 40 kA, 8/20 waveshape. t /PNJOBM%JTDIBSHF Current Value: 20kA. t *OUFSNFEJBUFDVSSFOU rating: 50A/150A. t 3FDPHOJ[FEUP6- 1449 3rd edition. t -FBE'SFFBOE RoHS compliant. t *OUFHSBUFENJDSPTXJUDI for indication circuitry/design. t ¡$UP¡$PQFSBUJOH temperature. Applications t 41%BQQMJDBUJPOT t "$%$EJTUSJCVUJPO t *5%BUBDFOUFS t 1PXFSTVQQMJFS t 5FMFDPNNVOJDBUJPO ©2012 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/smov34s.html for current information. SMOV34S Varistor Series Revision: May 24, 2012 HI–ENERGY SMOV34SMOV’S Series Description Varistor Products Thermally Protected Varistors > SMOV34S Series Absolute Maximum Ratings t'PSSBUJOHTPGJOEJWJEVBMNFNCFSTPGBTFSJFTTFF%FWJDF3BUJOHTBOE4QFDJmDBUJPOTDIBSU Continous: Steady State Applied Voltage: DC Voltage Range (VM(DC)) AC Voltage Range (VM(AC)RMS) Transient: /PO3FQFUJUJWF4VSHF$VSSFOUT8BWFGPSN*TM) /PO3FQFUJUJWF&OFSHZ$BQBCJMJUZNT8BWFGPSN8TM) SMOV34S Series Units 150 to 970 115 to 750 V V 40,000 A 280 to 1200 J Operating Ambient Temperature Range (TA) UP ¡$ Storage Temperature Range (TSTG) UP ¡$ Hi-Pot Encapsulation (Isolation Voltage Capability) 2500 V Isolation Voltage Capability (when the thermal disconnect opens) 1500 V >1,000 MΩ Housing Insulation Resistance $"65*0/4USFTTFTBCPWFUIPTFMJTUFEJOi"CTPMVUF.BYJNVN3BUJOHTwNBZDBVTFQFSNBOFOUEBNBHFUPUIFEFWJDF5IJTJTBTUSFTTPOMZSBUJOHBOEPQFSBUJPO of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. SMOV34S Series Ratings & Specifications Maximum Rating (75°C) Continuous Part Number AC Volts VM (AC) Specifications (25 °C) Transient DC Volts Energy 2ms VM(DC) WTM (V) 150 (J) 280 Peak Surge Current 8/20μs ITM 1 × Pulse (A) 40000 RMS Nominal Discharge Current In Varistor Voltage at 1mA Test Current V/(DC) Max V/(DC) Min SMOV34S111MP (V) 115 (V) SMOV34S131MP 130 175 310 SMOV34S151MP 150 200 360 SMOV34S181MP SMOV34S251MP SMOV34S271MP 180 250 275 240 320 350 SMOV34S301MP 300 SMOV34S321MP SMOV34S421MP SMOV34S461MP 460 610 960 40000 SMOV34S511MP 510 675 960 40000 SMOV34S551MP 550 700 965 40000 10000 770 939 SMOV34S751MP 750 970 1200 40000 10000 1080 1320 Maximum Clamping Voltage 8/20μs Typical Capacitance f = 1MHz Vc IPK C (A) 20000 163 202 (V) 305 (A) 200 (pF) 11500 40000 20000 184 228 345 200 10000 40000 20000 212 268 405 200 8000 400 490 550 40000 40000 40000 20000 20000 20000 254 354 389 312 429 473 488 650 730 200 200 200 6800 5000 4500 385 590 40000 20000 433 528 780 200 4050 320 420 640 40000 20000 462 561 830 200 3800 420 560 910 40000 20000 610 748 1130 200 3000 10000 642 783 1188 200 2800 10000 735 910 1350 200 2500 1415 200 2250 2000 200 1800 Average power dissipation of transients should not exceed 2.0 watts 4BNFSBUJOHTBOETQFDJmDBUJPOTBQQMZUP/PO*TPMBUFE.POJUPSFE4XJUDIBMUFSOBUJWFEFTJHO3FQMBDF.XJUI/JOUIFQBSUOVNCFSFH4.074/1 3FGFSUP1BSU/VNCFS4ZTUFNBUUIFFOEPGUIJTEPDVNFOU ©2012 Littelfuse, Inc. SMOV34S Varistor Series Revision: May 24, 2012 Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/smov34s.html for current information. Varistor Products Thermally Protected Varistors > SMOV34S Series Thermal Characteristics Peak Current & Energy Derating Curve 10 Current (A) Typical 10 A 5A 1 2.5 A 0.5 A 80 60 40 20 0 - 45 0 .1 Figure 1 HI–ENERGY SMOV34SMOV’S Series PERCENT OF RATED VALUE 100 1 10 50 60 70 80 90 100 110 120 130 AMBIENT TEMPERATURE (ºC) 10 0 Figure 2 Time (secs) 'PSBQQMJDBUJPOTFYDFFEJOH$BNCJFOUUFNQFSBUVSFUIFQFBL surge current and energy ratings must be reduced as shown. Pulse Rating Curve 50,000 20,000 SURGE CURRENT (A) 10,000 2 5,000 10 2 2,000 10 3 1,000 500 1 SMOV34 15 10 5 10 6 10 4 200 100 50 20 Figure 3 10 IND E FINITE 20 100 1,000 IMPULSE DURA 10,000 TION ( μs) SMOV34S V–I Characteristic Curves for SMOV34S Varistor 10000 Maximum Clamping Voltage SMOV34S series TA = -45 C to 75C V751 Voltage VOLTS V661 V511 V551 V681 V571 1000 V481 V141 V131 V111 V441 V151 V421 Figure 4 100 1mA 10mA 100mA Current - AMPS 1A V391 10A 100A ©2012 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/smov34s.html for current information. 1000A V351 V331 V321 V301 V271 10000A 100000A V251 V201 V181 SMOV34S Varistor Series Revision: May 24, 2012 Varistor Products Thermally Protected Varistors > SMOV34S Series Wave Solder Profile Because the SMOV34S Series varistors contain a thermal protection device, care must be taken when soldering the devices into QMBDF5XPTPMEFSJOHNFUIPETBSFQPTTJCMF'JSTUMZIBOETPMEFSJOH It is recommended to heat–sink the leads of the device. Secondly, wave–soldering: It is critically important that all preheat stage and the solder bath temperatures are rigidly controlled. Lead–free Profile Non Lead–free Profile 300 300 250 TEMPERATURE (ºC) TEMPERATURE (ºC) Maximum Wave 260C Maximum Wave 240C 250 200 150 100 200 150 100 50 50 0 0 0 0.5 1 1.5 2 2.5 3 3.5 TIME(MINUTES) Figure 5 0 4 0.5 1 1.5 2 2.5 3 3.5 4 TIME(MINUTES) Figure 6 Physical Specifications Environmental Specifications Lead Material Tin–plated Copper Operating/Storage Temperature ¡$UP¡$ ¡$UP¡$ Soldering Characteristics Solderability per MIL–STD–202, Method 208E Humidity Aging ¡$3)IPVST WPMUBHF Insulating Material Cured, flame retardant epoxy polymer meets UL94V–0 requirements. Thermal Shock ¡$UP¡$UJNFT WPMUBHF Device Labeling .BSLFEXJUI-'QBSUJEFOUJmFSBOE date code Solvent Resistance .*-o45%o.FUIPE' Moisture Sensitivity Level 1, J–STD–020C Part Numbering System Part Marking System UL Recognized SMOV 34 S 321 N P DEVICE FAMILY Component Mark Production Site Code Littelfuse Thermally Self Protected MOV Littelfuse Mark DISC SIZE (mm) Part Number 34mm CERAMIC SHAPE Production Date Dode (Year and Week) S: Square LF9 SMOV34S321MP 1148 VM(AC)RMS 115V to 750V M:With Isolated Monitored Switch N: Non Isolated Monitored Switch Design P: Lead-Free and RoHS compliant ©2012 Littelfuse, Inc. SMOV34S Varistor Series Revision: May 24, 2012 Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/smov34s.html for current information. Varistor Products Thermally Protected Varistors > SMOV34S Series Device Dimension Lead Configuration 41Max P1 LF9 LF 9 44.5Max Galvanic isolation SMOVXXS321MP SMOV34S321MP Thermal disconnect 1209 1148 S1 ON (Normal Close) 10Min 10Min S3 Common 1.4±0.2 3.6±0.3 1.2±0.3 3*0.6±0.2 0.3±0.2 6.0±0.2 0.5±0.2 6.0±0.2 P1 P2 Primary side P2 21.5±0.2 11.0±0.5 S2 OFF (Normal open) P1 S2 S3 S1 2.5±0.3 MOV S2 S3 S1 P2 Secondary side 6.5±2.2 Application Example Thermal disconnect * 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 ). S1 ON R LED S3 Common MOV S2 OFF Note: EXAMPLE ONLY - Connection to S2-S3 and S1-S3 depends on customer indication circuit and can vary. P2 Primary side To Protected Circuit Galvanic isolation P1 Secondary side Switch Specification SMOV Switch Voltage DC Current (Amps) Switch 12V 0.1A Contact Resistance Max. Insulation Resistance Min. 70mΩ ©2012 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/smov34s.html for current information. 100MΩ Dialectric Strength 0.5mA/Minute 500VAC SMOV34S Varistor Series Revision: May 24, 2012 HI–ENERGY SMOV34SMOV’S Series 20Max Varistor Products Thermally Protected Varistors > SMOV34S Series Term Definitions Rated AC Voltage (VM(AC)RMS) – MCOV This is the maximum continuous sinusoidal RMS voltage that may be applied. This voltage may be applied at any temperature up to the maximum operating temperature of the device. UL 1449 An Underwriters Laboratory standard covering the safety requirements for Surge Protective Devices intended for permanently connected, cord-connected and direct plug-in applications. Maximum Non-Repetitive Surge Current (ITM) This is the maximum peak current which may be applied for a single 8/20μs impulse, with rated line voltage also applied, without causing device failure. The pulse can be applied to the device in either polarity with the same confidence factor. Limited Current Abnormal Over-voltage Test An AC over-voltage condition applied to a Surge Protective Device according to UL 1449, Section 39.4. The short circuit current is limited by series connected resistors to 10A, 5A, 2.5A, 0.5A and 0.125A. The condition is maintained for 7 hours or until the device under test is disconnected from the AC supply or the current or temperature reaches equilibrium. Nominal Discharge Current (IN) Peak value of the current, selected by the manufacturer, through the SPD having a current waveshape of 8/20μs where the SPD remains functional after 15 surges. Voltage Protection Rating (VPR) A rating selected from a list of preferred values as given in UL 1449 and assigned to each mode of protection. The value of VPR is determined as the nearest highest value taken from UL 1449 to the measured limiting voltage determined during the transient-voltage surge suppression test using the combination wave generator at a setting of 6kV, 3kA. Maximum Non-Repetitive Surge Energy (WTM) This is the maximum rated transient energy which may be dissipated for a single current pulse at a specified impulse duration, with the rated RMS voltage applied, without causing device failure. Nominal Voltage (VN(DC)) This is the voltage at which the device changes from the off (standby state) to the on (clamping state) and enters its conduction mode of operation. The voltage value is usually characterised at the 1mA point and has a specified minimum and maximum voltage range. ©2012 Littelfuse, Inc. SMOV34S Varistor Series Revision: May 24, 2012 Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/smov34s.html for current information.