PRECISION LOW-OHM METAL PLATE RESISTORS RESISTORSCAPACITORSCOILSDELAY LINES RCD LV3 LV3 SERIES - MOLDED 3-WATT LOR SERIES - CERAMIC 3- & 5-WATT Term.W is Ideal for current sense applications RoHS compliant 0.0025Ω to .25Ω, 0.5% to 10% 260°C RoHS &compatible Low TC, high pulse capability Non-inductive metal element Available on RCD’s exclusive SWIFTTM delivery program! Choice of 2-terminal or 4-terminal designs 1.25” Typ ↓ ↑d ← A → 2nd pair of leads applies to Opt. 4T only X X → ← Resis. Measurement Point B C LOR is rectangular, LV is cylindrical (see Applic. Note #1) STANDARD RESISTANCE VALUES AND CODES (Non-standard values available, most popular values listed in bold) Ω (R005), .0068Ω(R0068), .0075Ω (R0075), .0025Ω (R0025), .003Ω (R003), .005Ω Ω (R010 if ≤1%,R01 if ≥2%), .012Ω(R012), .015Ω Ω (R015), .0082Ω (R0082), .01Ω ≥ 2%), .022Ω (R022), .025Ω Ω (R025), .03Ω Ω (R030 if Ω (R020 if≤ ≤ 1%, R02 if≥ .02Ω ≤1%, R03 if ≥ 2%), .033Ω (R033), .04Ω Ω (R040≤ ≤1%, R04≥ ≥2%), .05Ω Ω (R050≤ ≤1%, ≥2%), .068Ω(R068), .07Ω Ω (R070 if ≤1%, R07 if ≥ 2%), .075Ω (R075), R05≥ Ω (R080 if≤ ≤1%, R08 ≥2%), .1Ω Ω (R100 if≤ ≤1%, R10 ≥2%), .15Ω (R150 if .08Ω ≤1%, R15 ≥2%), .2Ω (R200 if ≤1%, R20 ≥2%), .25Ω (R250 if ≤1%, R25 ≥2%). RCD TYPE WATTAGE @25°C C U R R EN T RATING1 RESISTANCE RANGE (OHMS) RESISTANCE MEASUREMENT POINT ±.062 [1.6] A ±.04 [1] B ±.032 [.8] LOR3 3W 25A .0025 to .25 1.310 [33.3] .551 [14] .256 [6.5] LOR5 5W 40A .0025 to .25 1.670 [42.4] .880 [22.35] .320 [8.13] .040 [1] .100 [2.54] DIMENSIONS LV3 3W 25A .005 to 0.1 1.310 [33.3] .513 [13] .142 [3.6] .032 [.8] n/a Max. current is based on I= (P/R)1/2, not to exceed the value listed (increased levels avail). 2 Dim. C applies only to Opt.4T , C2 ±.032 [.8] d ±.002 [.05] .032 [.8] 3 Specify 3 .075 [1.9] opt.18 for .040 [1mm] lead dia POWER DERATING Test Parameter Performance, Typ. Load Life 0.5% +.5mΩ Vibration 0.05% +.5mΩ Overload 5 Sec, 5X rated W (NTE Current Rating) Temp. Coefficient (per chart, 4wire conn. at body) Temp. Range -55° to +275°C Dielectric Strength 1000 VAC Insulation Res. 10,000MΩ min dry Terminal Strength 10 lb. min. Solderability per Mil-STD-202, m.208 Inductance 5nH to 20nH typ % Rated Power PERFORMANCE CHARACTERISTICS 100 75 50 25 0 25 50 75 100 125 1) 3W parts to be measured at 1.31” [33.3mm], 5W parts at 1.67” [42.4mm]. Also available per customer requirement. 2) 18AWG (0.040” dia) leads are standard on LOR5 and available on LOR3 (specify 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. have ~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. 175 200 225 250 275 80 90 TEMPERATURE COEFFICIENT (typ.) 400 300 250 200 150 100 50 0 0 LOR3, LV3 LOR5, LOR3-18 Opt.4T 10 20 30 40 50 Resistance (milli ohm) P/N DESIGNATION: APPLICATION NOTES: 150 Temperature °C ppm/°C 1 B 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. Series LV3 molded design offers improved uniformity for high-volume autoplacement applications. The resistance element of LOR and LV3 is non-inductive and constructed from near-zero TCR alloy minimizing thermal instability. Construction is flame retardent, solvent- and moisture-resistant. OPTIONS Opt.18: .040” lead dia. on LOR3 (.040” is std on LOR5) Option 4T: 4 Terminal Option E: Low thermal emf design Non-std resistance values, custom marking, burn-in, etc. LOR LOR3 60 70 - R05 - J B W RCD Type (LOR3, LOR5, or LV3) Options: E, 4T, 18 (leave blank if standard) Resis. Code (see table above): 0.5% & 1%: 3 signif. digits & multiplier; R010=0.01Ω, R150=0.15Ω 2%-10%: use 2 signif.digits & multiplier; R01=.01Ω, R10=.1Ω, etc. Use extra digits as needed R005, R0025, R0075, R012, etc. Tolerance Code: D=0.5%, 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, Q= Tin/Lead (leave blank if either is acceptable, in which case RCD will select based on lowest price and quickest delivery) 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] FA049C 55 Sale of this product is in accordance with GF-061. Specifications subject to change without notice.