Type 1 And Type 2 Surge Protective Devices (SPDs)
Type 1 and Type 2Surge ProtectiveDevices (SPDs)Building Automation1
Other products which share similararchitecture with Type 1 & 2 Surge Protective DevicesIntelligent OutletsCircuit BreakerType III surgeprotectorType I & IIsurge protectorCommunicationport protectionDin RailPower SupplySwitch ModePower SupplyLittelfuse, Inc. 20212
Surge Protective Devices (SPDs) for AC linesMarket Trends and DriversType 1 and 2 SPD growing at a CAGR of 5.5% *With intelligent devices propagating throughout homes andbuildings surge protection has become even more important20Voltage surges come from various sources including lightningstrikes, switching of large motors or switch gear, coupling, andelectrostatic discharge1816A commercial or industrial facility will have surge protection devicesat the incoming AC line, at power distribution, and near criticalelectrically powered equipmentGlobal warming is projected to increase lighting strikes by 12% perdegree Celsius of global warming and about 50% over this century.Source: Science MagazineUnits (in m illions)141210864202020NEC2020 requires all new homes in the US to have Type 1 or Type2 SPD. 70% adoption of this code is expected by 2021. NEC claims 15,000 of electrical equipment that can be damaged in home20212022NA2023EU202420252025AsiaSource: *CAGR from Market & Markets & Grandview Research averageLittelfuse, Inc. 20213
Littelfuse components are core for Type 1 and 2 SPDsOvercurrent protectionOvervoltage protection Fuse MOV TMOVOvervoltage protection GDT SPDs come in different configurations depending on operating voltage, AC line type, and protection requirements Fuses can be integrated within SPDs or externalProtectControlSenseLittelfuse, Inc. 20214
How a Surge Protective Device (SPD) workFigure 1: SPD during normal operationL/ SPD function: SPDs limit the surge voltage amplitude to a defined level sodielectric strength of equipment is not exceeded. During voltagesurge the SPD discharges the associated surge currents. An example of a circuit with common mode 1 protection is shown inFigure 1. When a voltage surge occurs the SPD switches close as shown inFigure 2. Voltage surge sources can include lightning, inducedpower surges, industrial and switching surges, and nuclearelectromagnetic pulses. This closure only lasts for the duration of the surge voltage which istypically a few microseconds. The equipment is safeguarded and continues to operate.LoadN/SPDPEPE (Protective Earth)Figure 2: SPD activated by voltage surgeL/ LoadN/-SPDPEPE (Protective Earth)1. There are many different SPD product types different AC line voltages, configurations, and customer protection needs.Common mode as shown in example protects between active lines and protective conductor. SPD could also be placebetween active lines for normal (differential) mode voltage protectionLittelfuse, Inc. 20215
Click on the product series inthe table below for more infoLittelfuse components for single phase SPDsSingle phase load protectionSPD Notes:L The latest SPDs can offer features such as voltagesurge data and protection status through WiFi.ESD protection is available with TVS Diode Array,AQ1003-01LTG GDTs are often used between neutral and groundto minimize leakage current. Spark gap technology is sometimes used for IECClass 1 (EN Type 1) ogyFunction in ApplicationIFuseOv ercurrent protection specif ically forSPD productsIIMOVVoltage surge protection with thermaldisconnectIIIGDTVoltage surge protection with nosignif icant leakage currentSeriesLVSPTMOV, LSTCG2, CG3BenefitsFeaturesDesigned to surv iv e surges caused by lightning as Complements Littelf use MOVs and AK TVSdescribed in IEC and UL standardsdiodesSame f ootprint f or 50kA and 75kAf or same PCB lay out (LST)Surge protection f or AC linesImaxNormally open and normally closed options f orremote indicationRugged ceramic- metal constructionLittelfuse, Inc. 20216
Click on the product series inthe table below for more infoLittelfuse components for 3-phase SPDs3-Phase load protectionL1L2SPD Notes: The latest SPDs can offer features such as voltagesurge data and protection status through WiFi.ESD protection is available with TVS Diode Array,AQ1003-01LTG GDTs are often used between neutral and groundto minimize leakage current. In industrial and commercial buildings, a systemapproach is needed to optimize protection. Spark gap technology is sometimes used forIEC Class 1 (EN Type 1) ologyFunction in ApplicationIFuseOv ercurrent protection specif ically forSPD productsIIMOVVoltage surge protection with thermaldisconnectIIIGDTVoltage surge protection with nosignif icant leakage currentSeriesLVSPTMOV, LSTCG2, CG3BenefitsFeaturesDesigned to surv iv e surges caused by lightning as Complements Littelf use MOVs and AK TVSdescribed in IEC and UL standardsdiodesSame f ootprint f or 50kA and 75kAf or same PCB lay out (LST)Surge protection f or AC linesImaxNormally open and normally closed options f orremote indicationRugged ceramic- metal constructionLittelfuse, Inc. 20217
Terminology for OEM product with IEC and ULIEC 61643-11DescriptionUL 1449IimpMaximum surge current rating for an SPD subjected to a 10 x 350 µs wave shapeNot usedImaxMaximum surge current rating for an SPD subjected to an 8 x 20 µs wave shapeNot usedInISCCRNominal surge discharge current 8 x 20 µs wave shapeInShort Circuit Current Rating- withstand capabilitySCCRUPVoltage Protection Level, Max let thru voltage level of the SPD subjected to a test surgeUCMaximum Continuous Operating Voltage the SPD can be exposedNot usedMCOVNominal operational voltage, or application voltage8 x 20 µs pulse (IEC 61643-11 & UL 1449)VPROperational voltage10 x 350 µs pulse (IEC 61643-11 only) For UL Type 1 & Type 2 For IEC Class I (EN Type 1) For IEC Class II test (EN1 Type 2) Imax and In tested with this pulse shapeSPD must survive 5 pulsesincreasing in magnitude to max Iimp There is no equivalent test in theUL 14491. European Norm. Type is most often used by European OEMs instead of ClassLittelfuse, Inc. 20218
IEC & UL Class and TypeElectrical and electronic equipment and transients IEC 61643-11 Class (EN Type)- Class (EN Type) defined by surge current pulse shape used to testvoltage limiting SPD function- Class I uses 10/350 μs pulse shape- Class II uses 8/20 μs pulse shape- SPD can be classified as Class I & II- Class III have low discharge capacity and must be installed assupplement to Type II SPD- ENnd for Europe n Norm nd erm “Type” i u ed by mo Europe nOEMs instead of Class UL 1449 Types- Types 1, 2, and 3 defined by location- Type 1 are connected between service transformer and building line side- Type 2 are connected on load side of service disconnect or integrated inelectrical panel- Type 3 are point of use and plug in- Type 4 are component assemblies with one or more type 5 componentsincluding disconnect. Examples: LST or TMOV- Type 5 are discrete component surge suppressors such as MOVs thatmay be on printed circuit board. IEC Class III and UL Type 3 not included in this material.10 m (30 ft)IEC Class(EN Type)UL TypesClass I or I II(Type 1 or 1 2)Type 1Class II or Class I II(Type 2 or Type 1 2)Class II or Class II III(Type 3 or Type 1 2)Type 2Type 3plug inType 4 component assembly including disconnectType 5 components (example MOV)Betw een serviceLoad side of servicetransformer and buildingdisconnectPoint of UseAlso see our Spotlighton IEC 62368-1 StandardLittelfuse, Inc. 20219
SPD locations for industrial or commercial buildingsSPD locationProtected equipment examplesMain distribution protection UPS Motor ControlCenters (MCCs)Sub-distribution protection Equipm ent level protection Backup Pow er Sw itchgear Transfer switchLocal backup pow er BuildingSw itchgearmanagementGeneratorssystemsHVAC Pow er DistributionFire alarm systemsUnit (PDU)Security systemsMotor drivesSoft startsMedical equipmentLife supportequipment Test equipment Printers Communicationsystems Escalators/elevator Parking lot lighting Computer serversLittelfuse, Inc. 202110
Click on imagesto open thecatalogIntegrated CircuitsProduct CatalogAdditional information can be found on Littelfuse.comLittelfuse, Inc. 202111
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Partner for tomorrow’s electronic systemsBroad product portfolioCompliance & regulatory expertiseA global leader with a broad productportfolio, covering every aspect ofprotection, sensing, and controlWe help customers in the designprocess to account for requirementsset by global regulatory authoritiesSaferApplication expertiseTesting capabilitiesOur engineers partner directly withcustomers to help speed up productdesign and meet their unique needsTo help customers get products tomarket faster, we offer certificationtesting to global regulatory standardsConnectedGlobal customer serviceOur global customer service team iswith you to anticipate your needs andensure a seamless experienceGreenerGlobal manufacturingHigh-volume manufacturing that iscommitted to the highest qualitystandardsLittelfuse, Inc. 202113
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Supplementary slides
Schneider Homeline Plug-on Neutral SPDModel number & specificationNameThe Square D Homeline Plug-on Neutral Surge Protective DeviceModel NumberHOM250PSPDDescriptionResidential Surge Protective DevicesSpecificationsSchneider HomelinePlug-on Neutral SPDVoltage rating: 120/240 VMOCV:150 V L-N, 300 V L-LOther manufacturers ofsimilar productsABB, Rockwell, Eton, Ditek, DenhLittelfuse opportunitiesTMOV: LST1520EL2NT2Littelfuse, Inc. 202116
Click on the product series inthe table below for more infoSchneider Homeline Plug-on Neutral SPD teardownTPMOVMake: MersenLFUS: LST1505LEDTechnologyTMOVFunction in applicationSeriesProtects subsequent householdequipment from voltage surges suchas lighting other transientsLSTBenefitsSame footprint for 50 kA and 75 kA Imax forsame PCB layout (LST)ProtectControlSenseFeaturesNormally open and normally closed optionsfor remote indicationLittelfuse, Inc. 202117
Phoenix Contact–Type 2 SPDModel number & specificationNamePhoenix ContactModel NumberVAL-SEC-T2-3S-350/40DescriptionPluggable surge protective device, in accordance with Type 2/Class II, for 3phase power supply networks with separate N and PE (5-conductor system: L1,L2, L3, N, PE), with remote indication contact. With 40 kA discharge capacity inaccordance with the requirements of VDE 0100-534:2016-10 relating to SPDs atthe system feed point.SpecificationsPhoenix ContactType 2 SPDHeight:Width:Depth:Horizontal pitch:Operating voltage:97.9 mm49.2 mm74.5 mm (incl. DIN rail 7.5 mm)2.7 Div5 V AC . 250 V AC125 V DC (200 mA DCOperating current: 5 mA AC . 1 A AC1 A DC (30 V DC)Other manufacturers ofsimilar productsABB, Mersen, Schneider, Eaton, DEHN, OBO, Phoenix, HagerLittelfuse opportunitiesMOV: Custom, GDT: CustomLittelfuse, Inc. 202118
Click on the product series inthe table below for more infoPhoenix Contact–Type 2 MOV & GDT module teardownGDT moduleMOV module800 V Fat GDTMake: TDK (Epcos)LFUS: Custom – Contact ProductManagerTechnologyFunction in ApplicationVaristor, 517 V, Disc 33.8 mmMake: TDK (Epcos)LFUS: Custom- Contact Product ManagerSeriesBenefitsMOVVoltage surge protection with thermaldisconnectCustomFlexibility to of f er component that aligns with OEMsneedsHigh surge current withstanding and energyabsorption capabilitiesGDTVoltage surge protection with nosignif icant leakage currentCustomSurge protection f or AC linesRugged ceramic/metal constructionProtectControlSenseFeaturesLittelfuse, Inc. 202119
Littelfuse.comThis document is provided by Littelfuse, Inc. (“Littelfuse”) for informational and guideline purposes only. Littelfuse assumes no liability for errors or omissions in this document orfor any of the information contained herein. Information is provided on an “as is” and “with all faults” basis for evaluation purposes only. Applications described are for illustrativepurposes only and Littelfuse makes no representation that such applications will be suitable for the customer’s specific use without further testing or modification. Littelfuseexpressly disclaims all warranties, whether express, implied or statutory, including but not limited to the implied warranties of merchantability and fitness for a particular purpose,and non-infringement. It is the customer’s sole responsibility to determine suitability for a particular system or use based on their own performance criteria, conditions, specificapplication, compatibility with other components, and environmental conditions. Customers must independently provide appropriate design and operating safeguards to minimizeany risks associated with their applications and products. Read complete Disclaimer Notice at: se, Inc. 202120
Figure 2: SPD activated by voltage surge How a Surge Protective Device (SPD) work Load SPD L/ N/-PE PE (Protective Earth) Figure 1: SPD during normal operation Load SPD N/-PE (Protective Earth) 1. There are many different SPD product types different AC line
NATIONAL GYPSUM CO — Type FSK, Type FSK-G, Type FSW, Type FSW-3, Type FSW-5, Type FSW-G, Type FSK-C, Type FSW-C, Type FSMR-C, Type FSW-6, Type FSL 2K. Gypsum Board* — (As an alternate to Item 2) — 5/8 in. thick gypsum panels, with beveled, square, or tapered edges, applied either horizontally or vertically. Gypsum panels fastened to framing with 1-1/4 in. long Type W coarse
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* ASTM C 33 Table 2 Size Number 501–2.2 CEMENT. Cement shall conform to the requirements of ASTM C 150 Type I, Type II, or Type III. NOTE TO SPECIFIER: The FAA allows the following: ASTM C 150 – Type I, II, III, or IV. ASTM C 595 – Type IP, IS, S, I. Type I, Type II, or Type III cement was used in the Standard Specifications other types may be specified in the Special Provisions. ASTM C .
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