Cartridge Heaters www.tempco.com | (800) 323-6859 | email: [email protected] 2-4 Nominal Diameter 1/4" 5/16" 3/8" 1/2" 5/8" 3/4" 1" Maximum Voltage 240 240 240 240 480* 480* 480* Maximum Amperage (see next line for exceptions) 4.4 4.5 6.7 10.5 23 23 23 †Maximum Amperage for Types C1C, C1D, C2C, C2D, 3.0 3.0 5.5 7.6 9.7 9.7 9.7 CS, F, M3, R1B, S1, S2, SA, W & W3 Terminations Minimum Wattage at 120V on a 1" long Heater 50 45 45 50 50 — — Minimum Wattage at 120V on a 2" long Heater 20 20 20 20 20 20 20 Maximum Wattage at 120V 525 540 800 1260 2760 2760 2760 Maximum Wattage at 240V 1050 1080 1600 2520 5520 5520 5520 Maximum Wattage at 480V — — — — 11,000 11,000 11,000 Wattage Tolerance Plus 5%, Minus 10% Resistance Tolerance Plus 10%, Minus 5% Nominal Diameter 1/4" 5/16" 3/8" 1/2 5/8" 3/4" 1" in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) Actual Diameter .246 (6.25) .308 (7.82) .371 (9.42) .496 (12.60) .621 (15.77) .746 (18.95) .996 (25.30) Diameter Tolerance ±.002 (.051) ±.002 (.051) ±.002 (.051) ±.002 (.051) ±.002 (.051) ±.003 (.076) ±.003 (.076) Minimum Length 1 (25.40) 1 (25.40) 1 (25.40) 1 (25.40) 1 (25.40) 1-1/4 (31.75) 1-3/4 (44.45) Maximum Length 36 (914) 36 (914) 48 (1219) 60 (1524) 72 (1829) 72 (1829) 72 (1829) ±3/32 (2.4) ±3/32 (2.4) ±3/32 (2.4) ±3/32 (2.4) ±3/32 (2.4) ±1/8 (3.2) ±1/8 (3.2) Length Heaters up to 5" (127 mm) Tolerance ±2% of Sheath Length Heaters over 5" (127 mm) Camber Tolerance Heaters up to 6" 0.005" (0.127 mm) (152 mm) long Camber Tolerance Heaters over 6" 0.020" (0.508 mm) per foot of length (152 mm) long (0.020 x (length in feet)2) †Current carrying capacities are for ambient temperatures up to 482°F (250°C) with mica insulated lead wires. *480V when applicable. Consult Tempco. A certain amount of Camber is unavoidable. With a slight force, Hi-Density Cartridge Heaters will flex enough to fit into a straight reamed hole. The electrical resistance (ohms) of the heater resistance wire increases with temperature rise. Tempco standard Hi-Density Cartridge Heaters are manufactured with ohms (cold ohms) 3.3% lower than the actual calculated ohms (hot ohms) to compensate for this increase. Consult factory for maximum wattages and voltages. * Heaters may require a larger diameter transition area at lead end. Up to 36": -1/2", +1" (-12.7 mm, +25.4 mm) 36" to 72": -1", +2" (25.4 mm, +50.8 mm) Above 72": ±4" (101.6 mm) Dual Dual Multiple Heat Zones Diameter Volts 3-Phase Circuits (maximum 3 zones) 1/4" No No No No 5/16" No No No No 3/8" Yes* No No Yes* 1/2" Yes* Yes Yes Yes* 5/8" Yes Yes Yes Yes 3/4" Yes Yes Yes Yes 1" Yes Yes Yes Yes ELECTRICAL SPECIFICATIONS LENGTH TOLERANCE FOR: – LEAD WIRES – WIRE BRAID LEADS – ARMOR CABLE LEADS DIMENSIONAL SPECIFICATIONS TEMPERATURE COEFFICIENT OF RESISTANCE AVAILABLE ELECTRICAL FEATURES Hi-Density Cartridge Heater Specifications Note: Specifications detailed on this page are standard. Consult Tempco if your application requires tighter tolerances or has other special requirements. Max. Temperature: v1400°F (760°C) Max. Watt Density: 100-300 W/in2 (15.5-46.5 W/cm2) depending on heater size & operating temperature. PERFORMANCE RATINGS NOTE: The maximum operating temperature and the life expectancy of a cartridge heater is dependent on two main factors: 1. The maximum recommended sheath temperature (v1200°F for a standard heater) 2. The maximum ambient temperature for the termination selected. Consult Tempco if you require a recommendation for your application. Note: For Miniature Cartridge Heater Specifications in 1/8", 5/32" and 3/16" diameters, see page 2-10.
