210 Series 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. Dividohm(R) Vitreous Enamel Adjustable Power Resistors D C L Series D12 D25 D50 D75 D100 D175 D225 D500 D1000 Dimensions (in. / mm) Wattage Ohms Length Diam. Core Voltage 12 1.0-10K 1.75 / 44.4 0.313 / 7.94 0.188 / 4.76 565 25 1.0-25K 2.0 / 50.8 0.562 / 14.3 0.313 / 7.94 625 50 1.0-100K 4.0 / 101.6 0.562 / 14.3 0.313 / 7.94 1625 75 1.0-100K 6.0 / 152.4 0.562 / 14.3 0.313 / 7.94 2625 100 1.0-100K 6.5 / 165.1 0.750 / 19.1 0.50 / 12.7 2845 175 1.0-100K 8.5 / 215.9 1.125 / 28.6 0.75 / 19.1 3595 225 1.0-100K 10.5 / 266.7 1.125 / 28.6 0.75 / 19.1 4595 500 1.5-15K 12.0 / 304.8 2.50 / 63.5 1.75 / 44.5 4970 1000 3.0-27.7K 20.0 / 508.0 2.50 / 63.5 1.75 / 44.5 8900 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 Jan. 2006 Add "E" suffix to part number to specify. Other sizes available. Consult factory. Also available in low cost Centohm coating. Consult Factory. Power limitations for high resistance values: When resistance exceeds the resistance values listed at right, derate the Power Rating by 25% to improve reliability: Power Resistance rating value 12W 4,500 25W 9,000 50W 20,000 75W 35,000 100W 50,000 No power derating necessary for ratings higher than 100 watts. SPECIFICATIONS Material Coating: Lead free vitreous enamel. Core: Tubular ceramic. Terminals: Solder coated radial lug. Adjustable terminal: Nickel plated steel. (Screwdriver type adjustable lug supplied standard. Other types, including silver contact units, available.) Derating: Linearly from 100% @ +25C to 0% @ +350C. Electrical Tolerance: 10% (K) Power rating: Based on 25C 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 the approximate 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. See page 34 for mounting hardware S T O C K PA RT N U M B E R S F O R S TA N D A R D R E S I S TA N C E VA L U E S Wattage = Most popular stock values = Stock values = Non-stock values subject to minimum handling charge per item 30 D500K--- 500 D1000K---1000 7,500 8,000 8,500 9,000 10,000 12,000 15,000 20,000 25,000 30,000 35,000 40,000 45,000 50,000 60,000 75,000 80,000 100,000 ---7K5 ---8K0 ---8K5 ---9K0 ---10K ---12K ---15K ---20K ---25K ---30K ---35K ---40K ---45K ---50K ---60K ---75K ---80K ---100K D225K--- 225 D225K--- 225 Ohmic value D100K--- 100 D175K--- 175 D175K--- 175 D100K--- 100 D75K--- 75 D50K--- 50 D25K--- 25 Part No. Prefix Suffix D12K--- 12 D50K--- 50 D75K--- 75 ---400 ---500 ---600 ---750 ---800 ---1K0 ---1K25 ---1K5 ---2K0 ---2K25 ---2K5 ---3K0 ---3K5 ---4K0 ---4K5 ---5K0 ---6K0 ---7K0 D25K--- 25 400 500 600 750 800 1,000 1,250 1,500 2,000 2,250 2,500 3,000 3,500 4,000 4,500 5,000 6,000 7,000 D12K--- 12 Ohmic value D1000K---1000 D500K--- 500 D225K--- 225 50 75 D175K--- 175 D100K--- 100 D50K--- D75K--- 25 D25K--- 12 D12K--- Part No. Prefix Suffix Wattage 1.0 ---1R0 2 ---2R0 3 ---3R0 4 ---4R0 5 ---5R0 7.5 ---7R5 10 ---10R 15 ---15R 20 ---20R 25 ---25R 50 ---50R 75 ---75R 100 ---100 150 ---150 200 ---200 250 ---250 300 ---300 350 ---350 Part No. Prefix Suffix Ohmic value Wattage Shaded values involve very fine resistance wire and should not be used in critical applications without burn-in and/or thermal cycling. Ohmite Mfg. Co. 1600 Golf Rd., Suite 850, Rolling Meadows, IL 60008 * Tel. 1-866-9-OHMITE * Fax 1-847-574-7522 * www.ohmite.com * info@ohmite.com