RESISTORSꢀCAPACITORSꢀCOILSꢀDELAY LINES
PRECISION LOW-OHM METAL PLATE RESISTORS
V3
RCD L
LOR
LV3 SERIES - MOLDED 3-WATT
LOR 4T
LOR SERIES - CERAMIC 3- & 5-WATT
Term.W is
RoHS
compliant
& 260°C
compatible
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.
ꢀ Ideal for current sense applications
ꢀ 0.0025Ω to .25Ω, 0.5% to 10%
ꢀ Low TC, high pulse capability
ꢀ Non-inductive metal element
RoHS
ꢀ Available on RCD’s exclusive SWIFTTM delivery program!
ꢀ Choice of 2-terminal or 4-terminal designs
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.
STANDARD RESISTANCE VALUESAND CODES
(Non-standard values available, most popular values listed in bold)
.0025Ω (R0025), .003Ω (R003), .005Ω (R005), .0068Ω(R0068), .0075Ω (R0075),
.0082Ω (R0082), .01Ω (R010 if ≤1%,R01 if ≥2%), .012Ω(R012), .015Ω(R015),
.02Ω (R020 if≤1%, R02 if≥2%), .022Ω (R022), .025Ω (R025), .03Ω (R030 if
≤1%, R03 if ≥2%), .033Ω (R033), .04Ω (R040≤1%, R04≥2%), .05Ω (R050≤1%,
R05≥2%), .068Ω(R068), .07Ω (R070 if ≤1%, R07 if ≥2%), .075Ω (R075),
.08Ω (R080 if≤1%, R08 ≥2%), .1Ω (R100 if≤1%, R10 ≥2%), .15Ω (R150 if
≤1%, R15 ≥2%), .2Ω (R200 if ≤1%, R20 ≥2%), .25Ω (R250 if ≤1%, R25 ≥2%).
2nd pair of leads
appliestoOpt. 4Tonly
1.25” Typ
←
A →
B
↓
↑
B
X
X
C
d
→
LOR is rectangular,
LV is cylindrical
← Resis. Measurement Point
(see Applic. Note #1)
RCD WATTAGE CURRENT RESISTANCE
RESISTANCE
MEASUREMENT POINT
DIMENSIONS
TYPE
@25°C
RATING1
RANGE
(OHMS)
A ±.04 [1]
B ±.032 [.8]
d ±.002 [.05]
C2 ±.032 [.8]
±.062 [1.6]
3
LOR3
LOR5
LV3
3W
5W
3W
25A
40A
25A
.0025 to .25
.0025 to .25
.005 to 0.1
1.310 [33.3]
1.670 [42.4]
1.310 [33.3]
.551 [14]
.880 [22.35]
.513 [13]
.256 [6.5]
.320 [8.13]
.142 [3.6]
.032 [.8]
.040 [1]
.032 [.8]
.075 [1.9]
.100 [2.54]
n/a
1 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 3 Specify opt.18 for .040 [1mm] lead dia
PERFORMANCE CHARACTERISTICS
POWER DERATING
100
Test Parameter
Performance, Typ.
,
75
50
25
0
Load Life
Vibration
0.5% +.5mΩ
0.05% +.5mΩ
25
50
75
100
125
150
175
200 225
250
275
Overload
5 Sec, 5X rated W
(NTE Current Rating)
Temperature °C
Temp. Coefficient
Temp. Range
(per chart, 4wire conn. at body)
-55° to +275°C
TEMPERATURECOEFFICIENT (typ.)
400
LOR3, LV3
300
250
200
150
100
50
Dielectric Strength
1000 VAC
Insulation Res.
Terminal Strength
Solderability
10,000MΩ min dry
10 lb. min.
LOR5, LOR3-18
ꢀ
Opt.4T
per Mil-STD-202, m.208
5nH to 20nH typ
0
0
10
40
70
80
90
20 Res3is0tance (milli5o0hm) 60
Inductance
P/NDESIGNATION:
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.
LOR3
- 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.
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.
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)
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.
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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