PRECISION LOW-OHM METAL PLATE RESISTORS LOR SERIES OPTIONS Option 4T: 4 Terminal Option E: Low thermal emf design Non-std resistance values, custom marking, burn-in, etc. ↓ X ↑d (2Pl) ← ← → B LOR ← ↓ ↑d (4Pl) A B X Resis. Measurement Point (see Applic. Note #1) 1.25” Typ → → B LOR 4T B C LOR 4T Series LOR rectangular shape and high thermal conductivity ceramic case efficiently transfers heat from the internal element resulting in excellent stability and overload capability. The resistance element is non-inductive and constructed from near-zero TCR alloy minimizing thermal instability. Construction is flame retardent, solvent- and moisture-resistant. LOR (2-terminal design) is available to 0.5% tolerance, LOR-4T (4-terminal design) is available to 0.1%. STANDARD RESISTANCE VALUES AND CODES (Non-standard values available, most popular values listed in bold) STANDARD VALUES AND CODES .0025W (R0025),RESISTANCE .003W (R003), .005W (R005), .0068W (R0068), .0075W (Non-standard values available, most popular values listed .012W in bold)(R012), (R0075), .0082W (R0082), .01W (R010 if ≤1%,R01 if ≥2%), .0025Ω (R0025), .003Ω (R003), .005Ω .0075Ω (R0075), .015W (R015), .02W (R020 if ≤1%, R02 if(R005), ≥2%), .0068Ω(R0068), .022W (R022), .025W (R025), .0082Ω (R0082), .01Ω if ≤1%,R01 if ≥2%), .012Ω(R012), .015Ω(R015), .03W (R030 if ≤1%, R03(R010 if ≥2%), .033W (R033), .04W (R040 if ≤1%, R04 if .02Ω (R020 if≤1%,ifR02 if≥2%), .025Ω (R025), .03Ω (R030 ≥2%), .05W (R050 ≤1%, R05 if.022Ω ≥2%),(R022), .068W (R068), .07W (R070 if ≤1%,ifR07 R03 if ≥2%), .033Ω (R033), (R040≤1%, R04≥2%), .05Ω if(R050≤1%, if≤1%, ≥2%), .075W (R075), .08W (R080.04Ω if ≤1%, R08 if ≥2%), .1W (R100 ≤1%, R10 .068Ω(R068), .07Ω (R070 if ≤1%, if ≥2%), .075Ω ifR05≥2%), ≥2%), .15W (R150 if ≤1%, R15 if ≥2%), .2WR07 (R200 if ≤1%, R20(R075), if ≥2%),.08Ω .25W (R080 ifif≤1%, .1Ω (R100 if≤1%, R10 ≥2%), .15Ω (R150 if ≤1%, R15 (R250 ≤1%,R08 R25≥2%), if ≥2%). ≥2%), .2Ω (R200 if ≤1%, R20 ≥2%), .25Ω (R250 if ≤1%, R25 ≥2%). RCD TYPE WATTAGE @25°C MAX CURRENT RATING1 RESISTANCE RANGE (OHMS) RESISTANCE MEASUREMENT POINT ±.062 [1.6] A ±.04 [1] B ±.032 [.8] d ±.002 [.05] C2 ±.032 [.8] LOR3 3W 25A .0025 to .25 1.310 [33.3] .551 [14] .256 [6.5] .032 [.8]3 .075 [1.9] LOR4 4W 32A .0025 to .25 1.310 [33.3] .551 [14] .256 [6.5] .040 [1]4 .075 [1.9] LOR5 5W 40A .0025 to .25 1.670 [42.4] .880 [22.35] .320 [8.13] .040 [1] .100 [2.54] PERFORMANCE CHARACTERISTICS Test Parameter Performance, Typ. Load Life 0.5% +.5MW Vibration 0.05% +.5MW Overload 5 Sec, 5X Rated W (NTE Current Rating) Temp. Coefficient (per chart, 4-wire conn. at body) Temp. Range -55° To +275°C Dielectric Strength 1000 VAC Insulation Res. 10,000MW min. dry Terminal Strength 10 lb. min. Solderability Per Mil-STD-202, m.208 Inductance Non-Inductrive (3nH to 20nH typ.) APPLICATION NOTES: 1) LOR3 & 4 parts have resistance measured at 1.31” [33.3mm], LOR5 at 1.67” [42.4mm]. Also available per customer requirement. 2) 18AWG (.040” dia) leads are standard on LOR4 & 5 and available on LOR3 by specifying opt.18. RCD recommends .040” leads, since the heavier gauge results in lower lead resistance, improved heat transfer, and lower in-circuit TCR (.032” leadwires have resistivity of ~1mΩ/in., 0.04” dia. ~0.6mΩ/in). An extra inch of .032” leadwire in the circuit will increase the TC of a 10mΩ resistor by roughly 350ppm. Keep leadwires short for best TC stability. 3) To achieve utmost precision in current sense or shunt applications, RCD offers LOR3 & LOR5 in 4-terminal version, specify opt.4T (eliminates lead resistance when utilized in Kelvin configuration). Request App. note #R31 for performance comparison of 2- vs. 4-terminal. 3 DIMENSIONS Specify opt.18 for .040 [1mm] lead dia 4Specify opt.20 for .032 [0.8mm] lead dia POWER DERATING % Rated Power I=(P/R)1/2, not to exceed max current rating (increased levels avail). 2 Dim. C applies to Opt.4T 100 75 50 25 0 25 50 75 100 125 150 175 200 Temperature °C 225 250 275 70 80 90 TEMPERATURE COEFFICIENT (typ.) ppm/°C 1 A LOR 2-Terminal & 4-Terminal Term.W Ideal for current sense applications is Pb-free and RoHS 0.0025Ω to .25Ω, 0.1% to 10% RoHS compliant Low TC, high pulse capability Non-inductive metal element Available on RCD’s exclusive SWIFTTM delivery program! 1.25” Typ RESISTORSCAPACITORSCOILSDELAY LINES 400 300 250 200 150 100 50 0 0 LOR3 LOR4, LOR5, LOR3-18 Opt.4T 10 20 30 40 50 60 Resistance (milli ohm) P/N DESIGNATION: RCD Type (LOR3, LOR4, LOR5) LOR3 - R05 - J B W Options: E, 4T, 18 (leave blank if standard) Resis. Code (see table above): 0.5% & 1%: 3 signif. digits & multiplier; R010=.01Ω, R150=.15Ω 2%-10%: use 2 signif.digits & multiplier; R01=.01Ω, R10=.1Ω, etc. Use extra digits as needed R005, R0025, R0075, R012, etc. Tolerance: B=.1%, C=.25%, D=.5%, F=1%, G=2%, H=3%, J=5%, K=10% Packaging: B = bulk (std.),T = Tape & Reel (not avail. on option 4T) Termination: W= Lead-free (std), Q= Tin/Lead (leave blank if both acceptable) RCD Components Inc, 520 E.Industrial Park Dr, Manchester, NH, USA 03109 rcdcomponents.com Tel: 603-669-0054 Fax: 603-669-5455 Email:[email protected] 55 FA049D Sale of this product is in accordance with GF-061. Specifications subject to change without notice.