TC Series This product has been DISCONTINUED PECOS® stands for Porcelain Enamel Coating on Steel. It is a plate resistor system utilizing thick film ruthenium oxide on a porcelain coated steel substrate. Copper plated silver conductors are employed and the resistive element is protected by a glass passivation layer. These resistors offer low inductance (50nh @1MHz) and very high power densities (15W/in2). Being PC-board mountable, they are economic to install and best suited for applications under 200V operating. PECOS Resistors Thick Film on Porcelainized Steel Substrate ® C 0.28"/7.11mm FEATURES 0.41"/10.41mm A E B typical D Terminal Detail: T 0.2"/5.08mm 0.2"/5.08mm (0.1"/2.54mm for 10 watt) • 15W/in2 Power Density • Low Inductance • Easy to Install 0.04" diam. Pins (corner pins can be omitted at customer request) SPECIFICATIONS Material Substrate: PECOS® (Porcelain Enamel Coating on Steel) Resistor: Ruthenium Oxide Coating: Glass Terminals: Solder Plated Phosphor Bronze, riveted in place and electrically connected with high temperature solder. Thermal Conductivity: 60 Watts/ Meter/°C, x-y direction Temperature Coefficient: 150 ppm/°C ≥ 1Ω Electrical Ohmic Range: 1-2500Ω Tolerance: ±1-5% to 20% Power Rating: Based on 25°C free air Maximum Operating Voltage: 200 VDC Overload: Five times rated power, as long as the one second average dissipation does not exceed the wattage rating. ∆R: ±2%, 2000 hours DERATING CURVE 100 Watts A B E TC010PA 10 0.300 / 7.62 0.55 / 13.97 1.25 / 31.75 0.29 / 7.37 0.50 / 12.70 TC020PA 20 0.600 / 15.24 1.10 / 27.94 1.40 / 35.56 0.37 / 9.40 1.00 / 25.40 TC025PA 25 1.000 / 25.40 1.60 / 40.64 1.25 / 31.75 0.37 / 9.40 1.40 / 35.56 TC050PA 50 1.000 / 25.40 1.75 / 44.45 2.50 / 63.50 0.37 / 9.40 1.40 / 35.56 TC100PA 100 1.300 / 33.02 2.55/ 64.77 3.35 / 85.09 0.37 / 9.40 1.70 / 43.18 Percent Rated Watts Dimensions (in. / mm) C D Series 80 60 40 20 0 25 50 100 150 200 250 300 Ambient Temperature, °C 350 O R D E R I N G I N F O R M AT I O N E = RoHS compliant Available Jan. 2006 ������������� Series Power Rating Package PA = standard Resistance (�) 5R00 = 5.0 50R0 = 50.0 Tolerance J = 5% K = 10% L* = 20% *20% Values are not laser trimmed and offer enhanced surge handling. This product has been DISCONTINUED 2 Ohmite Manufacturing Company Tel. 847-675-2600 • Fax 847-675-1505 • www.ohmite.com • [email protected]