RES-270 OHMITE | Alldatasheet
Document overview
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Technical content
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com 113
270 Series
Series Wattage Ohms Core Code Voltage Std. Terminal L12 12 0.1-51K D 565 57 L25 25 0.15-100K K 625 40 L50 50 0.38-260K K 1625 40 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 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 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 high resistance values When resistance exceeds the resistance values listed, derate the Power Rating by 25% to 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 Select 270 Type fixed resistors for applications requiring wattage ratings from 12 to 1000 watts. The 270 Type resistors are equipped with lug termi- nals 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.
FeatureS
- 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, http://www.ohmite.com/techdata/terminals.pdf SerIeS SPeCIFICatIONS CharaCterIStICS (continued)
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com114 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 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 Tolerance J= 5% K= 10% Core Diameter See “Core and Terminal Selection” Ohms R500 = 0.500Ω 1R00 = 1Ω 250R = 250Ω 1K00 = 1,000Ω 25K0 = 25,000Ω 25K5 = 25,500Ω RoHS Compliant Coating 270 = Vitreous 470 = Silicone Ceramic Wattage Terminal Type See “Resistor Terminals for Tubular Cores” Non-inductive Blank =S tandard N= Non-inductive L 25J100E Tolerance J= 5% K= 10% Ohms 1R0 = 1Ω 250 = 250Ω 1K0 = 1,000Ω 25K = 25,000Ω 25K5 = 25,500Ω RoHS Compliant WattageSeries Coating Blank =V itreous C= Centohm S= Silicone Non-inductive Blank =S tandard N= Non-inductive F = Fast on (optional) See website for custom core and terminal info L D C Series Wattage L D C Core Code* Std. Term.** * http://www.ohmite.com/techdata/200-210-270-custom.pdf ** http://www.ohmite.com/techdata/terminals.pdf dImeNSIONS in./mm