270 Series Vitreous Enamel Power C D See page 36 for mounting hardware L Series L12 L25 L50 L100 L175 L225 L500 L1000 Wattage 12 25 50 100 175 225 500 1000 F e a t u r es S pec i f i c a t i o n s • Terminals suitable for soldering or bolt connection • High wattage applications • Rugged lead free vitreous enamel coating • Flame resistant coating • All-welded construction • RoHS compliant available • “Fast on” option – see terminal 538, page 37 Material Coating: Lead free vitreous enamel. Very large models (750 watts and up) are supplied in Silicone Ceramic. Also available in low-cost Centohm coating; Consult factory. Core: Tubular ceramic. Terminals: Solder coated radial lug. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu Derating: Linearly from 100% @ +25°C to 0% @ +350°C. Electrical Tolerance: ±5% 1Ω and over (J) ±10% under 1Ω (K) Power rating: Based on 25°C free air rating. Overload: 10 times rated wattage for 5 seconds. Temperature coefficient: 1 to 20Ω: ±400 ppm/°C. Above 20Ω: ±260 ppm/°C Dielectric withstanding voltage: 1000 VAC: 12 to 100 watt rating. 3000 VAC: 175 to 225 watt rating (Measured from terminal to mounting bracket) To calculate max. amps: use the formula √P/R Dimensions (in. / mm) L D C 1.75 / 44.4 0.313 / 7.94 0.188 / 4.76 2.0 / 50.8 0.562 / 14.3 0.313 / 7.94 4.0 / 101.6 0.562 / 14.3 0.313 / 7.94 6.5 / 165.1 0.750 / 19.1 0.50 / 12.7 8.5 / 215.9 1.125 / 28.6 0.75 / 19.1 10.5 / 266.7 1.125 / 28.6 0.75 / 19.1 12.0 / 304.8 2.50 / 63.5 1.75 / 44.5 20.0 / 508.0 2.50 / 63.5 1.75 / 44.5 Ohms 0.1-51K 0.15-100K 0.38-260K 0.23-101K 0.13-101K 0.16-129K 0.38-218K 0.69-392K Core Code D K K M P P S S Voltage 565 625 1625 2845 3595 4595 4970 8900 Standard Terminal 57 40 40 40 46 46 45 45 Non-Inductive versions available; Other sizes available; Also available in low cost Centohm or Silicone coating; Consult Ohmite. * Maximum Voltage is based on Ohm’s Law [V=√P*R] as limited by the resistance value of specified product Select 270 Type fixed resistors for applications requiring wattage ratings from 12 to 1000 watts. The 270 Type resistors are equipped with lug terminals suitable for soldering or sturdy bolt connection. When secure mounting is required, the hollow core of these resistors permit fastening with spring-type brackets, thru bolts or thru bolts with slotted-steel brackets. Suitable for rugged applications, the 270 Type resistors feature all-welded construction and durable lead free vitreous enamel coating. Mounting brackets not included with resistors. Made-to-order parts ordering infO Non-inductive F = Fast on Blank = Standard N = Non-inductive (optional) L Non-inductive Blank = Standard N = Non-inductive RoHS Compliant RoHS Compliant ���������������� 25J100E Series Coating Blank = Vitreous C = Centohm S = Silicone Core Diameter See “Core and Terminal Selection” Wattage Tolerance Ohms J = 5% 1R0 = 1 Ω K = 10% 250 = 250 Ω 1K0 = 1,000 Ω 25K = 25,000 Ω 25K5 = 25,500 Ω Coating Wattage 270 = Vitreous 470 = Silicone Ceramic Terminal Type See “Resistor Terminals for Tubular Cores” Ohms Tolerance R500 = 0.500 Ω J = 5% 1R00 = 1 Ω K = 10% 250R = 250 Ω See website for 1K00 = 1,000 Ω 25K0 = 25,000 Ω custom core and 25K5 = 25,500 Ω terminal info Power limitations for high resistance values: When resistance exceeds the resistance values listed, derate the Power Rating by 25% to improve reliability: Power Resistance No power derating rating value necessary 12W 3,900Ω for ratings 25W 12,000Ω higher than 50W 35,000Ω 100W. 100W 75,000Ω 34 Ohmite Mfg. Co. 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] L1000J–––1000 L500J––– 500 2,500 3,000 3,500 4,000 5,000 6,000 7,500 10,000 12,000 15,000 20,000 25,000 30,000 35,000 40,000 50,000 60,000 75,000 100,000 150,000 200,000 250,000 L225J––– 225 L175J––– 175 L100J––– 100 Part No. Prefix Suffix –––2K5E –––3K0E –––3K5E –––4K0E –––5K0E –––6K0E –––7K5E –––10KE –––12KE –––15KE –––20KE –––25KE –––30KE –––35KE –––40KE –––50KE –––60KE –––75KE –––100KE –––150KE –––200KE –––250KE L50J––– 50 L25J––– 25 L225J––– 225 Ohmic value L175J––– 175 L500J––– 500 L100J––– 100 Red outlined values supplied in Silicone-Ceramic coatings instead of vitreous enamel. L50J––– 50 = Standard values; check availability using the worldwide inventory search at www.ohmite.com 1 2 3 4 5 10 15 25 50 75 100 125 150 200 250 500 750 800 1,000 1,500 2,000 Part No. Prefix Suffix –––1R0E –––2R0E –––3R0E –––4R0E –––5R0E –––10RE –––15RE –––25RE –––50RE –––75RE –––100E –––125E –––150E –––200E –––250E –––500E –––750E –––800E –––1K0E –––1K5E –––2K0E L25J––– 25 12 Watt L12J180E L12J270E L12J330E L12J390E L12J470E L12J560E L12J1K0E L12J1K2E L12J1K5E L12J2K2E L12J2K7E L12J4K7E L12J10KE L12J18KE L12J22KE L12J51KE Wattage 12 Watt L12JKR51E L12J1R0E L12J3R3E L12J4R7E L12J10RE L12J12RE L12J15RE L12J22RE L12J27RE L12J33RE L12J47RE L12J68RE L12J82RE L12J100E L12J150E Ohmic value 180 270 330 390 470 560 1000 1200 1500 2200 2700 4700 10000 18000 22000 51000 Ohmic value Wattage Ohmic value 0.51 1 3.3 4.7 10 12 15 22 27 33 47 68 82 100 150 L1000J–––1000 S ta n d a r d pa rt n u m b e r s f o r 2 7 0 s e r i e s