L25J1R0E OHMITE | Alldatasheet

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Technical content

270 Series

Dimensions (in. / mm) Core Standard Series Wattage Ohms L D C Code Voltage Terminal FEa TurES

  • Terminals suitable for soldering or bolt connection
  • High wattage applications
  • Rugged lead free vitreous enam- el coating
  • Flame resistant coating
  • All-welded construction
  • RoHS compliant available
  • “Fast on” option – see terminal 538, page 37 SPECiFiCa TiOnS 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% @ 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 rat-

ing (Measured from terminal to mounting bracket) To calculate max. amps: use the formula √P/R See page 36 for mounting hardware 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 con- nection. 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. Standard part numberS for 270 SerieS  = Standard values; check availability using the worldwide inventory search at www.ohmite.com Red outlined values supplied in Silicone-Ceramic coatings instead of vitreous enamel. 0.51  L12JKR51E 1  L12J1R0E 3.3  L12J3R3E 4.7  L12J4R7E 10  L12J10RE 12  L12J12RE 15  L12J15RE 22  L12J22RE 27  L12J27RE 33  L12J33RE 47  L12J47RE 68  L12J68RE 82  L12J82RE 100  L12J100E 150  L12J150E 15 –––15RE  180  L12J180E 270  L12J270E 330  L12J330E 390  L12J390E 470  L12J470E 560  L12J560E 1000  L12J1K0E 1200  L12J1K2E 1500  L12J1K5E 2200  L12J2K2E 2700  L12J2K7E 4700  L12J4K7E 10000  L12J10KE 18000  L12J18KE 22000  L12J22KE 51000  L12J51KE 3,500 –––3K5E  6,000 –––6K0E  12,000 –––12KE  30,000 –––30KE   35,000 –––35KE  60,000 –––60KE  150,000 –––150KE  200,000 –––200KE  250,000 –––250KE  Ohmic value 12 Watt Ohmic value 12 Watt Ohmic value L25J––– 25 L50J––– 50 L100J––– 100 L175J––– 175 Wattage Part no. Prefix  Suffix L225J––– 225 L500J––– 500 L1000J–––1000 Ohmic value L25J––– 25 L50J––– 50 L100J––– 100 L175J––– 175 Wattage Part no. Prefix  Suffix L225J––– 225 L500J––– 500 L1000J–––1000 ordering info made-to-order partS Tolerance J= 5% K= 10% Core Diameter See “Core and Terminal Selection” Ohms R500 = 0.500 Ω 1R00 = 1 Ω 250R = 250 Ω 1K00 = 1,000 Ω 25K0 = 25,000 Ω 25K5 = 25,500 Ω RoHS Compliant Coating 270 = Vitreous 470 = Silicone Ceramic Wattage Terminal Type See “Resistor Terminals for Tubular Cores” Non-inductive Blank = Standard N= Non-inductive L 25J100E Tolerance J= 5% K= 10% Ohms 1R0 = 1 Ω 250 = 250 Ω 1K0 = 1,000 Ω 25K = 25,000 Ω 25K5 = 25,500 Ω RoHS Compliant WattageSeries Coating Blank =V itreous C= Centohm S= Silicone Non-inductive Blank = Standard N= Non-inductive F = Fast on (optional) Power limitations for high resis- tance values: When resistance exceeds the resistance values listed, derate the Power Rating by 25% to improve reliability: Power Resistance rating value 12W 3,900Ω 25W 12,000Ω 50W 35,000Ω 100W 75,000Ω No power derating necessary for ratings higher than 100W. See website for custom core and terminal info L D C