270 Series Vitreous Enamel Power Select 270 Type fixed resistors for applications FeatureS requiring wattage ratings from 12 to 1000 watts. • Terminals suitable for soldering The 270 Type resistors are equipped with lug termi- or bolt connection nals suitable for soldering or sturdy bolt connection. • High wattage applications When secure mounting is required, the hollow core of these resistors permit fastening with spring-type • Rugged lead free vitreous enamel coating brackets, thru bolts or thru bolts with slotted-steel • Flame resistant coating brackets. • All-welded construction Suitable for rugged applications, the 270 Type • RoHS compliant available resistors feature all-welded construction and durable lead free vitreous enamel coating. Mounting brackets • “Fast on” option – see terminal 538, not included with resistors. http://www.ohmite.com/techdata/terminals.pdf SerIeS SPeCIFICatIONS Series Wattage Ohms Core Code Voltage Std. Terminal Non-Inductive versions available; Other sizes available; Also available in L12 12 0.1-51K D 565 57 low cost Centohm or Silicone coating; Consult Ohmite. L25 25 0.15-100K K 625 40 * Maximum Voltage is based on L50 50 0.38-260K K 1625 40 Ohm’s Law [V=√P*R] as limited by the resistance value of specified product L100 100 0.23-101K M 2845 40 L175 175 0.13-101K P 3595 46 L225 225 0.16-129K P 4595 46 L500 500 0.38-218K S 4970 45 L1000 1000 0.69-392K S 8900 45 CharaCterIStICS Coating Lead free vitreous enamel. Large models (500 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. 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) Max. amps use the formula √P/R Power limitations for When resistance exceeds the resistance values listed, derate the Power Rating by 25% to high resistance values improve reliability. No power derating necessary for ratings higher than 100W. Power Resistance rating value 12W 3,900Ω 25W 12,000Ω 50W 35,000Ω 100W 75,000Ω Mounting Hardware see http://www.ohmite.com/techdata/lug-mounting.php (continued) 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 113

270 Series Vitreous Enamel Power dImeNSIONS in./mm Series Wattage L D C Core Code* Std. Term.** L12 12 1.75 / 44.4 0.313 / 7.94 0.188 / 4.76 D 57 L25 25 2.0 / 50.8 0.562 / 14.3 0.313 / 7.94 K 40 L50 50 4.0 / 101.6 0.562 / 14.3 0.313 / 7.94 K 40 D C L100 100 6.5 / 165.1 0.750 / 19.1 0.50 / 12.7 M 40 L175 175 8.5 / 215.9 1.125 / 28.6 0.75 / 19.1 P 46 L L225 225 10.5 / 266.7 1.125 / 28.6 0.75 / 19.1 P 46 L500 500 12.0 / 304.8 2.50 / 63.5 1.75 / 44.5 S 45 L1000 1000 20.0 / 508.0 2.50 / 63.5 1.75 / 44.5 S 45 * http://www.ohmite.com/techdata/200-210-270-custom.pdf ** http://www.ohmite.com/techdata/terminals.pdf OrderINg INFOrmatION Standard Made-to-order Non-inductive Non-inductive Core Diameter F =(o Fpatisotn oanl)BlanNk==NStoann-dinadrductive RCooHmSpliant BlanNk==NStoann-dinadrudctive STeerem “iCnaolr eS ealnedction” RoHS Compliant L 2 5 J 1 0 0 E Coating Wattage Ohms Tolerance Series Wattage Tolerance Ohms 270 = Vitreous R500 = 0.500Ω J= 5% Coating J = 5% 1R0 = 1Ω 470 = Silicone Ceramic Terminal Type 1R00 = 1Ω K= 10% BlanCSk===CSViietlirnceotoonuhesm K= 10% 2125K50K0 === 2125,500,00Ω00Ω0Ω See “Rfoers Tisutbour lTaer rCmoinreasls” 2125K50K0R00 === 122,550,000Ω00Ω0Ω 25K5 = 25,500Ω See website for 25K5 = 25,500Ω custom core and terminal info Standard part numbers for 270 series Wattage Wattage 1 Ovha03ml. .u53ie1 c  1LLL2111 W222JJJaK13tRRtR035EE1E Ovha123ml873u000iec 1 2 LLLW111222aJJJtt123873000EEE Ohmic value PPSaruerffftii xxN o. L25J ––– 25 L50J––– 50 L100J––– 100 L175J –––175 L225J––– 225 L500J –––500 L1000J–––1000 Ohmic value PPSaruerffftii xxN o. L25J ––– 25 L50J ––– 50 L100J –––100 L175J –––175 L225J ––– 225 L500J ––– 500 L1000J–––1000 4.7  L12J4R7E 390  L12J390E 1 –––1R0E      2,500 –––2K5E     10  L12J10RE 470  L12J470E 2 –––2R0E      3,000 –––3K0E      12  L12J12RE 560  L12J560E 3 –––3R0E      3,500 –––3K5E  15  L12J15RE 1000  L12J1K0E 4 –––4R0E      4,000 –––4K0E   22  L12J22RE 1200  L12J1K2E 5 –––5R0E      5,000 –––5K0E      27  L12J27RE 1500  L12J1K5E 10 –––10RE      6,000 –––6K0E  33  L12J33RE 2200  L12J2K2E 15 –––15RE  7,500 –––7K5E     47  L12J47RE 2700  L12J2K7E 25 –––25RE      10,000 –––10KE      68  L12J68RE 4700  L12J4K7E 50 –––50RE      12,000 –––12KE  82  L12J82RE 10000  L12J10KE 75 –––75RE      15,000 –––15KE     100  L12J100E 18000  L12J18KE 100 –––100E      20,000 –––20KE     150  L12J150E 22000  L12J22KE 125 –––125E   25,000 –––25KE    51000  L12J51KE 150 –––150E      30,000 –––30KE   200 –––200E   35,000 –––35KE   = Standard values; check availability using the worldwide inventory search at www.ohmite.com 250 –––250E      40,000 –––40KE   500 –––500E      50,000 –––50KE     Red outlined values supplied in Silicone-Ceramic coatings 750 –––750E     60,000 –––60KE  instead of vitreous enamel. 800 –––800E   75,000 –––75KE    1,000 –––1K0E      100,000 –––100KE      1,500 –––1K5E     150,000 –––150KE  2,000 –––2K0E      200,000 –––200KE  250,000 –––250KE  114 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com