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Resistors
LOW OHM METAL ALLOY CHIP RESISTORS
The LR series metal allow low ohm chip resistors are manufactured with tight tolerance, low TCR, high power density and low thermal EMF capability.
description

SPECIFICATION

Type No.

 # of Terminals Max.Rated Power Max. Rated Current Max.Overload Current T.C.R.(ppm/°C) Resistance Range(mΩ) Operating Temperature

D (±0.5%)

 F (±1%);G (±2%);J (±5%)

LR0805

 2 0.5W 10A 20A < ± 75 -- 5.0~20.0 -55~+150oC

LR1206

 2 0.5W 40.82A 81.64A 0.3mΩ: < ± 450
0.5~0.9mΩ: < ±175
1.0~15.0mΩ: < ±75
15.1~50.0mΩ: < ±50		 7.0~50.0 0.3~50.0 -55~170°C

1W

 57.74A 115.47A 0.3mΩ: < ±450
0.5~0.9mΩ: < ±175
1.0~15.0mΩ: < ±75
15.1~50.0mΩ: < ±50		 7.0~50.0 0.3~50.0

1.5W

 70.71A 141.42A 0.3mΩ:< ±450
0.5~0.9mΩ: < ±175
1.0~15.0mΩ: < ±75		 7.0~50.0 0.3~50.0

LR2010

 1W 44.72A 89.44A 0.5~0.9 mΩ: < ±100
1.0~1.9mΩ: < ±75
2.0~6.9mΩ: < ±50
7.0~100mΩ: < ±25		 7.0~49 0.5~100
LR2512 1W 57.74A 129.10A 0.3mΩ: < ±150
0.5~1.0mΩ: < ±75
1.1~3.0mΩ: < ±50
3.1~100mΩ: < ±25 		7.0~50 0.3~100
1.5W 70.71A 158.11A
2W 81.65A 182.57A 0.3mΩ: < ±150
0.5~1.0mΩ: < ±75
1.1~3.0mΩ: < ±50
3.1~75mΩ: < ±25		 7.0~50 0.3~75.0
3W 100.00A 173.21A 0.3mΩ: < ±150
0.5~1.0mΩ: < ±75
1.1~2.5mΩ: < ±50
2.6~10.0mΩ: < ±25		 7.0~10.0 0.3~10.0
LR2725 4W 126.49A 252.95A 0.20mΩ: < ±100
0.25~3.0mΩ: < ±50		 -- 0.20~3.0
LR2728 3W 27.39A 47.43A 4.0~100mΩ: < ±25 4.0~19.0 4.0~100
3.5W 29.58A 51.23A 4.0~100mΩ: < ±25 4.0~19.0 4.0~100
4W 31.62A 63.25A 4.0~100mΩ: < ±25 4.0~19.0 4.0~50.0
LR4527S(without heat sink) 3W 77.5A 134A 0.5~1.0mΩ: < ±75
1.1~20mΩ: < ±50		 7.0 ~20 0.5~20
LR4527 5W 100A 173A 0.5~1.0mΩ: < ±75
1.1~200mΩ: < ±50		 7.0 ~120 0.5~200
EXPLANATION OF ORDERING CODE
LR
2512
2
1
R001
F
4
Type Size (inch) Number of Terminals Rated Power Resistance (4~6 Digits) Tolerance Packaging
LR:
Low Ohm
Metal Alloy
Chip Resistor

0805
1206
2010
2512
2725
2728
4527
4527S

2: 2 terminals

C=0.5W
1=1.0W
A=1.5W
2=2.0W
3=3.0W
B=3.5W
4=4.0W
5=5.0W

EX:
R001 = 1mΩ
R010 = 10mΩ
R100 = 100mΩ
R00025 = 0.25mΩ

D=± 0.5%
F=± 1.0%
G=± 2.0%
J=± 5.0%

A=500pcs
1=1,000pcs
2=2,000pcs
4=4,000pcs
DIMENSIONS
1206 / 2010 / 2512 / 2725 / 2728 4527 / 4527S 0805
Type Maximum Power Rating (Watts) Resistance Range (mΩ) Dimensions - in inches (millimeters)
L W H T1 T2

LR0805

 0.5 5 ~ 20 0.08±0.008
(2.032±0.20)		 0.05±0.008
(1.270±0.20)		 0.012±0.002
(0.30±0.05)		 0.020±0.008
(0.50±0.20)

LR1206

 0.5 & 1.0 0.3 0.126±0.010
(3.200±0.254)		 0.063±0.010
(1.600±0.254) 		0.039±0.010
(1.000±0.254)		 0.022±0.010
(0.550±0.254)
0.5~0.6 0.029±0.010
(0.725±0.254)
1.0 0.025±0.010
(0.645±0.254)		 0.020±0.010
(0.508±0.254)
2.0 ~ 4.0 0.022±0.010
(0.545±0.254)
5.0 0.024±0.010
(0.600±0.254)
6.0 ~50.0 0.020±0.010
(0.508±0.254)
1.5 0.3 0.039±0.010
(1.000±0.254)		 0.022±0.010
(0.550±0.254)
0.5~0.6 0.029±0.010
(0.725±0.254)
1.0 0.025±0.010
(0.645±0.254)		 0.020±0.010
(0.508±0.254)
LR2010 1.0 0.5 ~ 0.9 0.200±0.010
(5.080±0.254)		 0.100±0.010
(2.540±0.254)		 0.031±0.010
(0.787±0.254)		 0.057±0.010 (1.440±0.254)
1.0 ~ 3.0 0.051±0.010
(1.295±0.254)
3.1 ~ 4.0 0.025±0.010
(0.645±0.254)		 0.031±0.010
(0.787±0.254)
4.1 ~100.0
LR2512 1.0 & 1.5 0.3 0.246±0.010
(6.248±0.254)		 0.126±0.010
(3.202±0.254)		 0.040±0.010
(1.000±0.254)		 0.079±0.010
(2.02±0.254)
0.5 ~ 3.0 0.031±0.010
(0.787±0.254) 		0.074±0.010
(1.880±0.254)
3.1 ~ 4.0
4.1 ~75.0 0.025±0.010
(0.645±0.254)		 0.044±0.010
(1.118±0.254)
75.1 ~ 100.0 0.025±0.010
(0.645±0.254)		 0.034±0.010
(0.868±0.254)
2.0 0.3 0.040±0.010
(1.000±0.254)		 0.079±0.010
(2.02±0.254)
0.5 ~ 3.0 0.031±0.010
(0.787±0.254)		 0.074±0.010
(1.880±0.254)
3.1 ~ 4.0
4.1 ~75.0 0.0254±0.010
(0.645±0.254)		 0.044±0.010
(1.118±0.254)
3.0 0.3 0.040±0.010
(1.000±0.254)		 0.079±0.010
(2.02±0.254)
0.5 0.031±0.010
(0.787±0.254)		 0.074±0.010
(1.118±0.254)
0.6 ~ 2.9 0.044±0.010
(1.118±0.254)
3.0 ~ 4.0 0.066±0.010
(1.676±0.254)
4.1 ~ 10.0 0.025±0.010
(0.645±0.254)		 0.044±0.010
(1.118±0.254)
LR2725 4.0 0.20 ~ 0.50 0.268±0.010
(6.807±0.254)		 0.254±0.010
(6.452±0.254)		 0.254±0.010
(6.452±0.254)		 0.085±0.010
(2.159±0.254)
0.60 0.071±0.010
(1.803±0.254)
1.0 0.043±0.010
(1.092±0.254)		 0.085±0.010
(2.159±0.254)
1.5 0.039±0.010
(0.991±0.254)
2.0 0.035±0.010
(0.889±0.254)		 0.071±0.010
(1.803±0.254)
2.25~2.5 0.065±0.010
(1.651±0.254)
3.0 0.051±0.010
(1.295±0.254)
LR2728 3.0, 3.5 & 4.0 4.0~100.0 0.264±0.010
(6.706±0.254)		 0.283±0.010
(7.188±0.254)		 0.039±0.010
(0.991±0.254)		 0.045±0.010
(1.143±0.254)
LR4527S (without heat sink) 3.0 0.5 0.450±0.010
(11.430±0.254)		 0.270±0.010
(6.850±0.254)		 0.055±0.010
(1.400±0.254)		 0.127±0.010
(3.215±0.254) 		0.038±0.010
(0.965±0.254)
0.6 ~ 3.0
4.0 ~ 5.0
5.1 ~ 20 0.071±0.010
(1.815±0.254)
LR4527 5.0 0.5 0.450±0.010
(11.430±0.254)		 0.270±0.010
(6.850±0.254)		 0.059±0.010
(1.500±0.254)		 0.127±0.010
(3.215±0.254) 		0.038±0.010
(0.965±0.254)
0.6 ~ 3.0
4.0 ~ 5.0
5.1 ~ 20 0.071±0.010
(1.815±0.254)
POWER DERATING CURVE

For 1206, 2010, 2512, 2725, 2728, 4527 & 4527S at operating temperature of -55~+170oC.

For 0805 at operating temperature of -55~+150oC.

MARKING

All products except 0805 the marking are 4 digits. For 1206, 2010, 2512, 2725, 2728, 4527 & 4527S resistance is indicated by using two marking notation styles

  1. 1. “R” designates the decimal location in Ohms. Example:
    • For 1m product marking is R001
    • For 25m product marking is R025
    • For 100m product marking is R100
  2. 2. "m” designates the decimal location in milliohms. Example:
    • For 0.25m product marking is 0m25
    • For 5.5m product marking is 5m50
    • For 25.5m product marking is 25m5

For 0805 no marking is done.

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