Thermal Cut-Offs SDJ1/SDJ2 GENERAL Our Thermal Cut-Offs (Organic Thermal Element Type) are used to prevent fires caused by abnormal heat generation from circuits and other heat producing electrical products. They are a non-resettable thermal fuse which open electrical contacts when temperatures exceed the specified level. OPERATING PRINCIPLE When the ambient temperature rises to the functioning temperature, the thermal element melts and the springs move the contact away and open the circuit permanently. APPROVALS UL & cUL: E117626 VDE: 115369, 116219 PSE: JET2926-32001-1001-1009 CCC: 2003010205079617 EK: HH05009-2004A-2019A APPLICATIONS • Electric home appliances and heating devices • Coil-winding products and power supplies • Office equipment and telecommunication devices • Automobiles & other electronic components DIMENSIONS (mm) CAUTIONS • Bends in leads should be at least 3mm from the body of the TCO. • Extreme caution must be used while soldering, use a heatsink and avoid heating above Tf -24°C. • The metal portion of the TCO is electrically live and may require insulation. • Do not use in liquids or poisonous gasses such as sulfuric acid or nitrous oxide. • Do not connect heater directly to the cutoff. Division of Microtherm International Corporation 8415 Mountain Sights Avenue • Montreal (Quebec), H4P 2B8, Canada Tel: (514) 739-3274 • 1-800-561-7207 • Fax: (514) 739-2902 E-mail: [email protected] • Website: www.cantherm.com 2007/June O – APPROVED ON APPLYING TOLERANCE: +0ºC, -5ºC TF = Functioning Temperature TH = Holding Temperature DETERMINE THE PROPER SERIES • Tp : The highest temperature of the product to which a cutoff is to be attached. • Th : The safe temperature range for use of the cutoff. • Ts : 24ºC (Tp-Th) (Apply 35ºC for Ts value when Tp is higher than 170ºC.) • To : The heating temperature caused by electrical load (Please refer temperature / current correlation curve) • +a : 1. Self heating of lead wire 2. Structure of ventilation or airtightness 3. Location of connecting terminal 4. Thickness of insulated covering material 5. Best condition value considering electric voltage changes Tp + Ts + To +a = Applicable Temperature SAFE TEMPERATURE RANGE • The increasing temperature by remaining heat in the cutoff after melting is required to remain below Tm. • The temperature of the area where a cutoff will be attached should not reach over Th under normal usage conditions.