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210 Series

210 Series
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Features • Terminals suitable for soldering or bolt connection. • Adjustable lug supplied. • High wattage applications. • All-welded construction. • Rugged lead free vitreous enamel coating. • Flame resistant coating. • Thumb-screw-adjustable lug available (Part No. 2160) for 1.125” core resistors. • RoHS compliant product available. Add “E” suffix to part number to specify. Dividohm® Vitreous Enamel Adjustable Power D Other sizes available; contact Ohmite. Also available in low cost Centohm or Silicone coating; contact Ohmite. Choose Ohmite’s 210 Type adjustable resistors for applications requiring settings at different resistance values. These wirewound resistors are equipped with an adjustable lug, making them ideal for adjusting circuits, obtaining odd resistance values and setting equipment to meet various line voltages. 210 Type resistors feature a hollow core to permit secure fastening with spring-type clips or thru bolts with washers. They also offer the durability of lead free vitreous enamel coating and all-welded construction. Mounting brackets not included with resistors. ordering infO Coating Blank = Vitreous C = Centohm S = Silicone Adjustability is 10% to 90% of full value. Wattage is proportional to this adjusted resistance value. Material Coating: Lead free vitreous enamel. Core: Tubular ceramic. Core Diameter See “Core and Terminal Selection” Terminal Type See “Resistor Terminals for Tubular Cores” RoHS Compliant Coating Wattage 210 = Vitreous 410 = Silicone Ceramic 610 = Centohm See website for custom core and terminal info See page 36 for mounting hardware Power limitations for high resistance values: When resistance exceeds the resistance values listed below, derate the Power Rating by 25% to improve reliability: Power Resistance No power rating value derating 12W 4,500Ω necessary for 25W 9,000Ω ratings higher 50W 20,000Ω than 100W. 75W 35,000Ω 100W 50,000Ω RoHS Compliant Series Wattage Tolerance J = 5% K = 10% Terminals: Solder coated radial lug. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu Adjustable terminal: Nickel plated steel. (Screwdriver type adjustable lug supplied standard. Other types, including silver contact units, available.) Derating: Linearly from 100% @ +25°C to 0% @ +350°C. Electrical Tolerance: ±10% (K) Power rating: Based on 25°C free air rating. The stated wattage rating applies only when the entire resistance is in the circuit. Setting the lug at an intermediate point reduces the wattage rating by approximately the same proportion. Example: If the lug is set at half resistance, the wattage is reduced by approximately one-half. Overload: 10 times rated wattage for 5 seconds. Temperature coefficient: ±260 ppm/°C Dielectric withstanding voltage: 1000 VAC: 12 to 100 watt rating. 3000 VAC: 175 and 225 watt rating (measured from terminal to mounting bracket) To calculate max. amps: use the formula √P/R. Ohmic value Ohmic value = Standard values; check availability using the worldwide inventory search at www.ohmite.com Part No. Prefix Suffix Ohmic value Part No. Prefix Suffix Part No. Prefix Suffix 50KΩ and 100KΩ resistance values involve very fine resistance wire and should not be used in critical applications without burn-in and/or thermal cycling. 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com

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