PRECISION LOW-OHM METAL PLATE RESISTORS
RESISTORS CAPACITORS COILS DELAY LINES
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%
RoHS
& 260°C
compatible
Low TC, high pulse capability
Non-inductive metal element
Available on RCD’s exclusive
SWIFT
TM
delivery program!
Choice of 2-terminal or 4-terminal designs
RCD LV3
LOR
LOR 4T
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.
1.25” Typ
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 auto-
placement 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.
STANDARD RESISTANCE VALUES AND CODES
(Non-standard values available, most popular values listed in bold)
Ω
.0025Ω (R0025), .003Ω (R003),
.005Ω
(R005), .0068Ω(R0068), .0075Ω (R0075),
.0082Ω (R0082),
.01Ω
(R010 if
≤
1%,R01 if
≥
2%), .012Ω(R012),
.015Ω
(R015),
Ω
Ω
.02Ω
(R020 if≤1%, R02 if≥2%), .022Ω (R022),
.025Ω
(R025),
.03Ω
(R030 if
Ω
≤
≥
Ω
Ω
≤
1%, R03 if
≥
2%), .033Ω (R033),
.04Ω
(R040≤1%, R04≥2%),
.05Ω
(R050≤1%,
Ω
≤
≥
Ω
≤
R05≥2%), .068Ω(R068),
.07Ω
(R070 if
≤
1%, R07 if
≥
2%), .075Ω (R075),
≥
Ω
.08Ω
(R080 if≤1%, R08
≥
2%),
.1Ω
(R100 if≤1%, R10
≥
2%), .15Ω (R150 if
Ω
≤
Ω
≤
≤
1%, R15
≥
2%), .2Ω (R200 if
≤
1%, R20
≥
2%), .25Ω (R250 if
≤
1%, R25
≥
2%).
←
A
→
2nd pair of leads
applies to Opt. 4T only
B
B
↓
↑
d
X
X
←
Resis. Measurement Point
→
(see Applic. Note #1)
WATTAGE
@25°C
3W
5W
3W
C U R R EN T
RATING
1
25A
40A
25A
C
LOR is rectangular,
LV is cylindrical
RCD
TYPE
LOR3
LOR5
LV3
1
RESISTANCE
RANGE
(OHMS)
.0025 to .25
.0025 to .25
.005 to 0.1
RESISTANCE
MEASUREMENT POINT
±.062 [1.6]
1.310 [33.3]
1.670 [42.4]
1.310 [33.3]
DIMENSIONS
A
±.04 [1]
.551 [14]
.880 [22.35]
.513 [13]
B
±.032 [.8]
.256 [6.5]
.320 [8.13]
.142 [3.6]
d
±.002 [.05]
.032 [.8]
.040 [1]
.032 [.8]
3
Specify
3
C
2
±.032 [.8]
.075 [1.9]
.100 [2.54]
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
opt.18 for .040 [1mm] lead dia
PERFORMANCE CHARACTERISTICS
,
POWER DERATING
% Rated Power
100
75
50
25
0 25
50
75
100
125
150
175
200
225
250
275
Test Parameter
Load Life
Vibration
Overload
Temp. Coefficient
Temp. Range
Dielectric Strength
Insulation Res.
Terminal Strength
Solderability
Inductance
Performance, Typ.
0.5% +.5m
Ω
0.05% +.5m
Ω
5 Sec, 5X rated W
(NTE Current Rating)
(per chart, 4wire conn. at body)
-55° to +275°C
1000 VAC
10,000M
Ω
min dry
10 lb. min.
per Mil-STD-202, m.208
5nH to 20nH typ
Temperature °C
TEMPERATURE COEFFICIENT
(typ.)
400
300
250
200
150
100
50
0
0
LOR3, LV3
LOR5, LOR3-18
Opt.4T
ppm/°C
10
20
Resistance (milli ohm)
30
40
50
60
70
80
90
APPLICATION NOTES:
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.
P/N DESIGNATION:
RCD Type
(LOR3, LOR5, or LV3)
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=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:sales@rcdcomponents.com
FA049C
Sale of this product is in accordance with GF-061. Specifications subject to change without notice.
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