LOR

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

0.0025

Ω to .25Ω, 0.5% to 10%

Low TC, high pulse capability

Non-inductive metal element

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.

PRECISION LOW-OHM METAL PLATE RESISTORS

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 ~1m

Ω/in., 0.04” dia. have ~0.6mΩ/in).

An extra inch of .032” leadwire in the circuit will increase the TC of a 10m

Ω

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.

,

25

50

75

100

125

150

175

200

225

250

275

100

75

50

25

0

Temperature °C

TEMPERATURE COEFFICIENT (typ.)

Resistance (milli ohm)

0

10

20

30

40

50

60

70

80

90

r

e

t

e

m

a

r

a

P

t

s

e

T.

p

y

T

,

e

c

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a

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r

o

f

r

e

P

e

f

i

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d

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Lm

5

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+

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5

.

0

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n

o

it

a

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5

.

+

%

5

0

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0

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d

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5

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1

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e

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0

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0

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d

n

Ip

y

t

H

n

0

2

o

t

H

n

5

400

300

250

200

150

100

50

0

STANDARD RESISTANCE VALUES AND CODES

(Non-standard values available, most popular values listed in bold)

.0025

Ω (R0025), .003Ω (R003), .005Ω

Ω

Ω

Ω

Ω (R005), .0068Ω(R0068), .0075Ω (R0075),

.0082

Ω (R0082), .01Ω

Ω

Ω

Ω

Ω (R010 if ≤≤≤≤≤1%,R01 if ≥≥≥≥≥2%), .012Ω(R012), .015Ω

Ω

Ω

Ω

Ω(R015),

.02

Ω

Ω

Ω

Ω

Ω (R020 if≤≤≤≤≤1%, R02 if≥≥≥≥≥2%), .022Ω (R022), .025Ω

Ω

Ω

Ω

Ω (R025), .03Ω

Ω

Ω

Ω

Ω (R030 if

≤≤≤≤≤1%, R03 if ≥≥≥≥≥2%), .033Ω (R033), .04Ω

Ω

Ω

Ω

Ω (R040≤≤≤≤≤1%, R04≥≥≥≥≥2%), .05Ω

Ω

Ω

Ω

Ω (R050≤≤≤≤≤1%,

R05

≥≥≥≥≥2%), .068Ω(R068), .07Ω

Ω

Ω

Ω

Ω (R070 if ≤≤≤≤≤1%, R07 if ≥≥≥≥≥2%), .075Ω (R075),

.08

Ω

Ω

Ω

Ω

Ω (R080 if≤≤≤≤≤1%, R08 ≥≥≥≥≥2%), .1Ω

Ω

Ω

Ω

Ω (R100 if≤≤≤≤≤1%, R10 ≥≥≥≥≥2%), .15Ω (R150 if

≤≤≤≤≤1%, R15 ≥≥≥≥≥2%), .2Ω (R200 if ≤≤≤≤≤1%, R20 ≥≥≥≥≥2%), .25Ω (R250 if ≤≤≤≤≤1%, R25 ≥≥≥≥≥2%).

PERFORMANCE CHARACTERISTICS

POWER DERATING

FA049C

Sale of this product is in accordance with GF-061. Specifications subject to change without notice.

LOR3, LV3

Opt.4T

LOR5, LOR3-18

RCD LV3

B

C

A

→

Resis. Measurement Point

(see Applic. Note #1)

←

←

X

X

1.25” Typ

2nd pair of leads

applies to Opt. 4T only

d

↑

↓

→

LOR is rectangular,

LV is cylindrical

B

55

P/N DESIGNATION:

RCD Type (LOR3, LOR5, or LV3)

Options: E, 4T, 18 (leave blank if standard)

Packaging: B = bulk (std.),T = Tape & Reel (not avail. on option 4T)

LOR3

- R05 - J B W

Tolerance Code: D=0.5%, F=1%, G=2%, H=3%, J=5%, K=10%

Resis. Code (see table above):

0.5% & 1%: 3 signif. digits & multiplier; R010=0.01

Ω, R150=0.15Ω

2%-10%: use 2 signif.digits & multiplier; R01=.01

Ω, R10=.1Ω, etc.

Use extra digits as needed R005, R0025, R0075, R012, etc.

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)

RESISTORS CAPACITORS COILS DELAY LINES

D

C

R

E

P

Y

T

E

G

A

T

T

A

W

C

°

5

2

@

T

N

E

R

R

U

C

G

N

I

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A

R

1

E

C

N

A

T

S

I

S

E

R

E

G

N

A

R

)

S

M

H

O

(

E

C

N

A

T

S

I

S

E

R

T

N

I

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P

T

N

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M

E

R

U

S

A

E

M

]

6

.

1

[

2

6

0

.

±

S

N

O

I

S

N

E

M

I

D

A

]

1

[

4

0

.

±

B

]

8

.

[

2

3

0

.

±

d

]

5

0

.

[

2

0

0

.

±

]

8

.

[

2

3

0

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±

3

R

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LW

3A

5

25

2

.

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t

5

2

0

0

.]

3

.

3

3

[

0

1

3

.

1]

4

1

[

1

5

5

.]

5

.

6

[

6

5

2

.]

8

.

[

2

3

0

.

3

]

9

.

1

[

5

7

0

.

5

R

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LW

5A

0

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2

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5

2

0

0

.]

4

.

2

4

[

0

7

6

.

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5

3

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2

2

[

0

8

8

.]

3

1

.

8

[

0

2

3

.]

1

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0

4

0

.]

4

5

.

2

[

0

0

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.

3

V

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5

21

.

0

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t

5

0

0

.]

3

.

3

3

[

0

1

3

.

1]

3

1

[

3

1

5

.]

6

.

3

[

2

4

1

.]

8

.

[

2

3

0

.a

/

n

LOR 4T

RoHS

Term.W is

RoHS

compliant

& 260°C

compatible