250V - 16 (2) A (Self–hold TH11 and TH21) - Sensata

TH11 and TH21Self-hold Thermal Cut-OutsKEY BENEFITSFlexible mounting:3 terminal configurations availableRobust design:The bimetal disc is protected by themetal supportFull automated live:Provides stable setting valuesLow price:The particular design provides highcompetitivitySensata Technologies has developedthe electrical self-hold temperaturecut-out in order to offer a nonselfresetting device, suitable forhigh current applications, thus fulfillingthe growing need for highersafety.Design and operating principlesThe TH11 and TH21 consists of twonickel-plated supports, held togetherwith ceramic pins. One supportholds the high-performance Klixon®bimetal disc, which, in combinationwith the sophisticated contact system,guarantees the superior cyclingperformance. One ceramic pin has alayer of resistive material, functioningas a small heater when a voltageis supplied. A wide temperaturerange, standard 5K tolerance, differentbimetal resistivity and variousoptional terminal configurationsmake the TH11 and TH21 suitablefor a wide range of applications.Whereas the TH11 operates at230 Vac. The TH21 is designed for120 Vac applications. Because oftheir identical dimensions, the TH11and TH21 can be easily exchangedwith the auto reset thermal protectorTH10.The operating principle of the THseriesis both simple and effective. Acurrent flows through the resistiveKlixon® bimetal disc. When a faultcondition occurs, the increasedambient temperature causes thebimetal disc to snap open the contacts.The resistive layer spots thevoltage over the open contacts anda current flows through the resistor,generating sufficient heat to keepthe bimetal warm and the contactsopen. When the power is switchedoff, the device cools down to a safetemperature and the contacts willclose.ApplicationsThe TH11 and TH21 are temperatureresistive cut-outs for such applicationsas:· Fan heaters· Convector heaters· Hair dryersand various other applications whichrequire a non-self resetting protectorlike transformers, cable reels etc.

Coding SystemTH 11 C A 1011121Function220Vselfhold110VselfholdDeclarations TH11Terminal Disc and contactConfiguration support materialCode Terminals Code MaterialA SteelTerminals onA sam e endBCTerminals onopposite endTerminals onopposite end(with holes)Standard opening temperatureOperatingTemp.Lowresistivitybimetal disc(F30)Highresistivitybimetal disc(B1)60°C 031 03565°C 041 04570°C 051 05575°C 061 06580°C 071 07585°C 081 08590°C 091 09595°C 101 105100°C 111 115105°C 121 125110°C 131 135115°C 141 145120°C 151 155125°C 161 165130°C 171 175135°C 181140°C 191145°C 201150°C 211Declarations to EN60730-2-9Purpose of the controlVoltage maintained Thermal Cut-OutConstructionIncorporated, non-electronicDegree of protectionIP00Terminals for ext. conductors For internal conductors onlyMethod of (dis) connectionof terminalsRiveting, soldering, spotwelding, spring loaded contactingTemperature limits of theswitchhead 200°CPTI of insulation materials PTI 250Method of mountingBy various means in conjunction with (holes in) terminalssuch that adequate creepage and clearance distances aremaintained between live parts and accessible metal partsOperating timeFor continuous operationType of actionType 2BReset characteristicVoltage maintained off-position thru heat from the heaterfilm on oneceramic pin. Device resets by interrupting the power supplyExtent of sensing element Whole controlControl pollution degree Degree 2SpecificationsStandard operating temperature range from 60°C - 150°C TH11from 60°C - 130°C TH21Max. Ambient temperature 200°CTolerance on open temperature± 5KSelfhold function in still-air> -20°C TH11> -35°C TH21Certifications:Agency: ENECFilenumber: 2014531.14Rating: 16(2)A 250 Vac @ 1.000 cyclesStandard: EN60730-2-9, EN60730-2-2, EN60730-1Agency: ULFilenumber: E54813TECHNICAL / SALES SUPPORTHollandPhone +31 546 879560 Fax +31 546 879204Internet: www.sensata.comEmail: info-cpe@list.sensata.comImportant Notice: The products and services of Sensata Technologies and its subsidiaries described herein are sold subject toSensata’s standard terms and conditions of sale. Customers are advised to obtain the most current and complete informationabout Sensata products and services before placing orders. Sensata assumes no liability for applications assistance,customer’s applications or product designs, software performance, or infringement of patents. The publication of informationregarding any other company’s products or services does not constitute Sensata’s approval, warranty or endorsement thereof.Printed in Holland, April 2011