RESISTORSCAPACITORSCOILSDELAY LINES
PRECISION LOW-OHM METAL PLATE RESISTORS
LOR
LOR SERIES 2-Terminal & 4-Terminal
LOR 4T
Term.W
is Pb-free
Ideal for current sense applications
and RoHS
compliant
0.0025Ω to .25Ω, 0.1% to 10%
Low TC, high pulse capability
Series LOR rectangular shape and high thermal conductivity ceram-
ic 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 minimiz-
ing 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%.
RoHS
Non-inductive metal element
Available on RCD’s exclusive SWIFTTM delivery program!
OPTIONS
Option 4T: 4 Terminal
Option E: Low thermal emf design
Non-std resistance values, custom marking, burn-in, etc.
STANDARD RESISTANCE VALUES AND CODES
(Non-standard values available, most popular values listed in bold)
A →
←
1.25” Typ
B
STANDARD RESISTANCE VALUES AND CODES
.0025Ω (R0025), .003Ω (R003), .005Ω (R005), .0068Ω (R0068), .0075Ω
↓
↑
(Non-standard values available, most popular values listed in bold)
(R0075), .0082Ω (R0082), .01Ω (R010 if ≤1%,R01 if ≥2%), .012Ω (R012),
B
LOR
X
X
.0025Ω (R0025), .003Ω (R003), .005Ω (R005), .0068Ω(R0068), .0075Ω (R0075),
.015Ω (R015), .02Ω (R020 if ≤1%, R02 if ≥2%), .022Ω (R022), .025Ω (R025),
d (2Pl)
Resis. Measurement Point
(see Applic. Note #1)
←
→
.0082Ω (R0082), .01Ω (R010 if ≤1%,R01 if ≥2%), .012Ω(R012), .015Ω(R015),
.03Ω (R030 if ≤1%, R03 if ≥2%), .033Ω (R033), .04Ω (R040 if ≤1%, R04 if
.02Ω (R020 if≤1%, R02 if≥2%), .022Ω (R022), .025Ω (R025), .03Ω (R030 if
≥2%), .05Ω (R050 if ≤1%, R05 if ≥2%), .068Ω (R068), .07Ω (R070 if ≤1%, R07
≤1%, R03 if ≥2%), .033Ω (R033), .04Ω (R040≤1%, R04≥2%), .05Ω (R050≤1%,
if ≥2%), .075Ω (R075), .08Ω (R080 if ≤1%, R08 if ≥2%), .1Ω (R100 if ≤1%, R10
1.25” Typ
←
A →
B
R05≥2%), .068Ω(R068), .07Ω (R070 if ≤1%, R07 if ≥2%), .075Ω (R075), .08Ω
if ≥2%), .15Ω (R150 if ≤1%, R15 if ≥2%), .2Ω (R200 if ≤1%, R20 if ≥2%), .25Ω
((RR205800 iiff≤≤11%%,,RR0285≥if2≥%2)%, .)1.Ω (R100 if≤1%, R10 ≥2%), .15Ω (R150 if ≤1%, R15
≥2%), .2Ω (R200 if ≤1%, R20 ≥2%), .25Ω (R250 if ≤1%, R25 ≥2%).
↓
↑
LOR 4T
B
C
d(4Pl)
MAX
RESISTANCE
RANGE
RESISTANCE
MEASUREMENT POINT
DIMENSIONS
RCD WATTAGE
CURRENT
TYPE
@25°C
C2 ±.032 [.8]
RATING1
(OHMS)
±.062 [1.6]
A ±.04 [1]
B ±.032 [.8]
d ±.002 [.05]
LOR3
LOR4
LOR5
3W
4W
5W
25A
32A
40A
.0025 to .25
.0025 to .25
.0025 to .25
1.310 [33.3]
1.310 [33.3]
1.670 [42.4]
.551 [14]
.551 [14]
.256 [6.5]
.256 [6.5]
.320 [8.13]
.032 [.8]3
.040 [1]4
.040 [1]
.075 [1.9]
.075 [1.9]
.100 [2.54]
.880 [22.35]
1 I=(P/R)1/2, not to exceed max current rating (increased levels avail). 2 Dim. C applies to Opt.4T 3 Specify opt.18 for .040 [1mm] lead dia 4Specify opt.20 for .032 [0.8mm] lead dia
PERFORMANCE CHARACTERISTICS
POWER DERATING
100
Test Parameter
Load Life
Performance, Typ.
75
50
25
0.5% +.5MΩ
0.05% +.5MΩ
Vibration
0
25
50
75
100
125 150
175
200 225
250
275
5 Sec, 5X Rated W
Overload
Temperature °C
(NTE Current Rating)
Temp. Coefficient
(per chart, 4-wire conn. at body)
-55° To +275°C
TEMPERATURE COEFFICIENT (typ.)
Temp. Range
400
300
250
LOR3
Dielectric Strength
Insulation Res.
Terminal Strength
Solderability
1000 VAC
10,000MΩ min. dry
LOR4, LOR5,
LOR3-18
200
150
100
Opt.4T
10 lb. min.
50
0
0
Per Mil-STD-202, m.208
Non-Inductrive (3nH to 20nH typ.)
10
20
30
40
50
60
70
80
90
Inductance
Resistance (milli ohm)
P/N DESIGNATION:
APPLICATION NOTES:
LOR3
- R05 - J B W
1) LOR3 & 4 parts have resistance measured at 1.31” [33.3mm], LOR5 at 1.67”
[42.4mm]. Also available per customer requirement.
RCD Type (LOR3, LOR4, LOR5)
Options: E, 4T, 18 (leave blank if standard)
Resis. Code (see table above):
0.5%&1%: 3signif.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.
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.
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)
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.
-
-
-
-
RCD Components Inc, 520 E.Industrial Park Dr, Manchester, NH, USA 03109 rcdcomponents.com Tel: 603 669 0054 Fax: 603 669 5455 Email:sales@rcdcomponents.com
FA049D Sale of this product is in accordance with GF-061. Specifications subject to change without notice.
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