DATA SHEET
Product Name Metal Strip Chip Resistors
Part Name LR Series
Uniroyal Electronics Global Co., Ltd.
88#, Longteng Road, Economic & Technical Development Zone, Kunshan, Jiangsu, China
Tel
Email
Manufacture Plant
+86 512 5763 1411 / 22 /33
marketing@uni-royal.cn
Uniroyal Electronics Industry Co., Ltd.
Aeon Technology Corporation
Royal Electronic Factory (Thailand) Co., Ltd.
Royal Technology (Thailand) Co., Ltd.
Metal Strip Chip Resistors
1.
Scope
1.1 This specification for approve relates to the Metal Strip Chip Resistors manufactured by UNI-ROYAL.
1.2 Low Resistance / Low TCR
1.3 Excellent long term stability
1.4 RoHs compliant and halogen free.
1.5 Lead free.
1.6 High precision current sensing and voltage division.
2.
Part No. System
Part No. includes 14 codes shown as below:
2.1 1st~4th codes: Part name. E.g.: LR05, LR06, LR12，LR25，LR28，LR27
2.2 5th~6th codes: Power rating.
E.g.: W=Normal Size
“1~G” = “1~16”
Wattage
1/32
3/4
1/2
1/3
1/4
1/8
1/10
1/16
1/20
1
Normal Size
WH
07
W2
W3
W4
W8
WA
WG
WM
1W
If power rating is lower or equal than 1 watt, 5th code would be “W” and 6th code would be a number or letter.
E.g.: 1W=1W
4W=4W
2.3 7th code: Tolerance. E.g.: D=±0.5%
F=±1%
G=±2%
J=±5%
K= ±10%
2.4 8th~11th codes: Resistance Value.
2.4.1 If value belongs to standard value of ≥5% series, 8th code would be zero,9th~10th codes are significant figures of the resistance and 11th
code is the power of ten.
2.4.2 If value belongs to standard value of ≤2% series, 8th~10th codes are significant figures of the resistance, and 11th code is the power of ten.
2.4.3 11th codes listed as following:
0=100 1=101
2=102
3=103
4=104
5=105
6=106
J=10-1
K=10-2
L=10-3
M=10-4
-5
-6
N=10
P=10
2.5 12th~14th codes.
2.5.1 12th code: Packaging Type. E.g.: C=Bulk
T=Tape/Reel
2.5.2 13th code: Standard Packing Quantity.
4=4000pcs 5=5000pcs C=10000pcs
D=20000pcs
E=15000pcs
Chip Product: BD=B/B-20000pcs
TC=T/R-10000pcs
2.5.3 14th code: Special features.
E = Environmental Protection, Lead Free, or Standard type.
3.
Ordering Procedure
(Example: LR06 1W ±1% 1mΩ T/R-5000)
L
R
0
Product Type:
Fill-in 4 digits with
the chip resistor type
as follows:
LR05
LR06
LR12
LR25
LR28
LR27
6
1 W
Wattage:
07=3/4W
1W=1W
2W=2W
3W=3W
4W=4W
5W=5W
F
1
0
0
N
T
Resistance Value:
5%(E‐24 series):
The 1st digit will be “0”; the 2nd
& 3rd digits are for the significant
figures of the resistance and the
4th digit indicate the numbers of
zeros following.
1%(E-96 series ):
The 1st to 3rd digits are for the
significant figures of the
resistance and 4th digit denotes
number of zeros following.
5
E
Packing
quantity:
A=500 PCS
1=1000PCS
2=2000PCS
3=3000PCS
4=4000PCS
5=5000PCS
E= Lead-Free
J=10-1; K=10-2; L=10-3
M=10-4 ；N=10-5 ； P=10-6
D=±0.5%
F=±1%
G=±2%
J=±5%
Apr.02,2020
V.1
Packing Type:
T=Tape/Reel
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Page 2/8
Metal Strip Chip Resistors
4.
Marking
4.1 LR05 products no marking.
4.2 All the other products marking are 4 digits.
(1) “R” designates the decimal location in ohms
e.g. 1mΩ the product marking is R001.
25mΩ the product marking is R025.
100mΩ the product marking is R100.
(2) 0Ω product marking is 0R
4.3 The criteria to distinguishing the mark on the surface of products are that characters can be identified.
5. Standard Electrical Specifications
Type
LR05
LR06
LR12
LR25
LR28
LR27
T.C.R.
(ppm/℃)
Max.
Rating
Current
（A）
Max.
Overload
Current
(A)
≦±100
31.62
63.24
---
1
≦±75
25.81
44.72
---
1.5~2
≦±50
15.81
31.62
---
2.5~15
1W
≦±50
31.62
63.24
7~50
1~50
1.5W
≦±50
38.72
77.49
7~10
1~10
2W
≦±75
63.24
141.42
---
0.5~0.75
2W
≦±50
44.72
100.00
16~450
1~450
3W
≦±75
77.45
154.91
---
0.5~0.75
3W
≦±50
54.77
109.54
7~100
1~100
≦±75
126.49
252.98
Rating
Power
at 70℃
1W
4W
Resistance Range (mΩ)
0.5% (D)
1.0% (F)
2.0% (G)
5.0% (J)
Operating
Temperature
Range (℃)
-55~+170℃
0.25~0.3
---
≦±50
89.44
178.88
0.5~3
4W
≦±50
31.62
63.24
7~450
4~450
3W
≦±75
77.45
173.20
---
0.5
3W
≦±50
54.77
122.47
7~60
1~60
5W
≦±75
100.00
173.20
---
0.5
5W
≦±50
70.71
122.47
7~500
1~500
Jumper Specifications
Apr.02,2020
V.1
Type
Rating Power
at 70℃
Max.
Rating
Current
LR05
1W
70.7A
LR06
1W
70.7A
LR12
2W
100A
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Resistance
(mΩ)
Operating
Temperature
Range (℃)
≦0.2
-55~+170℃
Page 3/8
Metal Strip Chip Resistors
6. Dimension
Unit:mm
Type
Power
Rating
Resistance
Range
L
W
H
A
B
0.500±0.200
1mΩ
1.5mΩ
LR05
1W
2mΩ
2.5~3mΩ
2.100±0.200
1.500±0.200
0.350±0.200
/
0.400±0.200
0.508±0.254
0.508±0.254
1.150±0.254
1.800±0.200
0.900±0.200
1.05±0.254
2.200±0.254
1.800±0.200
0.900±0.200
4~8mΩ
1W
LR06
1.5W
2W
LR12
9~15mΩ
1mΩ
2mΩ
0.770±0.254
0.650±0.254
3~20mΩ
21~50mΩ
1mΩ
2mΩ
3~10mΩ
0.5mΩ
1 mΩ
2~15mΩ
16~75mΩ
76~100mΩ
101~135mΩ
136~200mΩ
201~450mΩ
0.5mΩ
1mΩ
0.550±0.254
3.200±0.254
1.650±0.254
0.700±0.200
0.600±0.254
0.550±0.254
0.470±0.254
6.35±0.254
3.18±0.254
1.5mΩ
3W
LR25
LR28
4W
4W
3W
LR27
5W
Apr.02,2020
V.1
0.470±0.254
0.770±0.254
0.650±0.254
0.550±0.254
0.770±0.254
1.100±0.254
0.75±0.254
0.400±0.254
0.850±0.254
0.770±0.254
0.670±0.254
2.200±0.254
1.150±0.254
2mΩ
2.5~6mΩ
7~75mΩ
76~100mΩ
0.25mΩ
0.3mΩ
0.5mΩ
1mΩ
1.5mΩ
2~3mΩ
4~450mΩ
0.5mΩ
1mΩ
1.5~5mΩ
6~60mΩ
0.5mΩ
1.400±0.254
1.150±0.254
0.550±0.254
0.600±0.254
0.550±0.254
0.75±0.254
0.770±0.254
6.800±0.254
6.600±0.254
11.300±0.500
6.350±0.254
6.700±0.254
6.600±0.500
1mΩ
0.650±0.254
0.40±0.254
0.650±0.254
0.90±0.254
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1.800±0.254
1.050±0.254
3.000±0.254
2.000±0.254
0.550±0.254
0.800±0.254
0.580±0.254
2.300±0.254
1.800±0.254
2.300±0.254
1.500±0.254
0.550±0.254
0.580±0.254
0.770±0.254
0.680±0.254
1.5~5mΩ
6~500mΩ
1.15±0.254
1.100±0.254
3.000±0.254
0.65±0.254
2.000±0.254
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Metal Strip Chip Resistors
JumperDimension
Unit:mm
Power
Rating
Type
Resistance
Range
L
W
H
A
B
LR05
1W
< 0.2mΩ
2.10±0.20
1.500±0.20
0.35±0.20
LR06
1W
< 0.2mΩ
3.200±0.250
1.650±0.250
0.650±0.254
0.508±0.254
0.508±0.254
LR12
2W
< 0.2mΩ
6.350±0.250
0.650±0.254
1.15±0.254
1.100±0.254
3.180±0.250
/
0.40±0.20
7. Structure
8.
Recommend land pattern
Unit：mm
Type
Resistance Range
a
b
i
LR05-1W
1~15mΩ
1.00
1.80
1.00
Jumper：≦0.2mΩ
1.46
2.15
1.68
1mΩ~100mΩ
1.46
2.15
1.68
Jumper：≦0.2mΩ
2.30
3.68
3.15
LR06 –1W,1.5W
LR12 -2W
LR12 3W
LR25 - 4W
LR28 - 4W
LR27-,3W,5W
Apr.02,2020
V.1
0.5mΩ
3.40
3.68
0.95
1mΩ~15mΩ
1.90
3.68
3.50
16mΩ~200mΩ
2.30
3.68
3.15
201mΩ~500mΩ
2.05
3.68
3.65
0.5mΩ~1mΩ
3.40
3.68
0.95
1.5mΩ
2.35
3.68
1.35
2mΩ
2.10
3.68
2.55
2.5mΩ~100mΩ
2.30
3.68
3.15
0.25mΩ；0.5mΩ
3.25
6.85
1.70
0.3mΩ；1mΩ~3mΩ
2.75
6.85
2.70
4mΩ~450mΩ
2.05
7.20
3.90
0.5mΩ~1.5mΩ
4.50
8.74
4.50
2.0mΩ~100mΩ
3.50
8.74
6.50
101mΩ~500mΩ
3.50
8.74
6.50
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Page 5/8
Metal Strip Chip Resistors
9. Derating Curve
Resistors shall have a power rating based on continuous load operation at an ambient temperature of 70 ℃. For temperature in excess of 70 ℃ ,
The load shall be derate as shown in figure 1.
Figure 1
The following equation may be used to determine the DC (Direct Current) or AC (Alternating Current) (RMS, root mean square value) of
normal rated power. However, if the result value exceeds the highest current of regulated standards, the highest normal rated power is to be
used
I= P R
I = Rating current (A)
P= Rating Power (W)
R= Resistance(Ω)
10.
Performance Specification
Test Item
Test Method
Procedure
Requirements
Temperature
Coefficient
JIS C 5201-1
4.8
Natural resistance changes per temp. Degree centigrade
R2-R1
× 106 (PPM/℃)
R1(t2-t1)
R1: resistance value at room temp. (t1)
R2: resistance value at room temp. +100℃ (t2)
Test pattern: room temp. (T1), room temp. +100℃(t2)
Short-time overload
JIS-C-5201
.4.13
Permanent resistance change after the application of a
potential of 5 times power rate for 5 seconds
ΔR≤土0.5%
Operational Life
JIS-C-5201
4.25.1
Permanent Resistance change after 1000 hours operating at
rated working current or Max .Working Current whichever
less with duty cycle of 1.5hours “ON”，0.5 hour “OFF” at
70±2°C ambient.
ΔR≤土1.0%
High Temp. Exposure
MIL-STD-202
108A
Exposed to a temperature of 170±2°C for 1000H.
ΔR≤土1.0%
Biased Humidity
MIL-STD-202
Method 103
1000 hours 85°C/85%RH. Note: Specified conditions:10%
of operating power. Measurement at 24±4 hours after test
conclusion.
ΔR≤土0.5%
Rapid change of
temperature
JIS-C-5201
4.19
30 min at -55 °C and 30 min at 170°C; 100 cycles
ΔR≤土0.5%
Terminal bending
JIS-C-5201
4.33
2mm， 60Sec
ΔR≤土0.50%
Resistance to
Solder Heat
JIS-C-5201
4.18
Solderability
JIS-C-5201
4.17
Dielectric
Withstanding
Voltage
JIS-C-5201
4.7
Applied 500 VAC for 1 minute , and Limit surge current 50
mA (max.)
No short or burned
on the appearance
Terminal Strength
JIS-C-5201
4.16
5N , 10 seconds
No broken
Apr.02,2020
V.1
Dip the resister into a temperature of 260±5°C and hold it
for a 10±1 seconds.
The area covered with a new, smooth, clean, shiny and
continuous surface free from concentrated pinholes.
Temperature of solder: 245±3°C; Dwell time in solder: 2~3
seconds.
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List by specification
ΔR≤土0.5%
>95% Coverage
Page 6/8
Metal Strip Chip Resistors
For Jumper
Test Item
11.
Test Method
Procedure
Requirements
Short Time
Overload
JIS C 5201-1
4.13
Permanent resistance change after the application of a potential of 4
times power rate for 5 seconds
≦0.2mΩ
Temperature
Cycling
JIS-C-5201
4.19
30 min at -55 °C and 30 min at 170°C; 100 cycles
≦0.2mΩ
High
Temperature
Exposure
MIL-STD-202
108A
Exposed to a temperature of 170±2°C for 1000H.
≦0.2mΩ
Bias Humidity
MIL-STD-202
Method 103
1000 hours 85°C/85%RH. Note: Specified conditions:10% of
operating power . Measurement at 24±4 hours after test conclusion.
≦0.2mΩ
Operational Life
JIS C 5201-1
4.25
Solderability
JIS-C-5201
4.17
Permanent Resistance change after 1000 hours operating at rated
working current or Max .Working Current whichever less with duty
cycle of 1.5hours “ON”，0.5 hour “OFF” at 70±2°C ambient.
The area covered with a new, smooth, clean, shiny and continuous
surface free from concentrated pinholes. Temperature of solder :
245±3°C; Dwell time in solder: 2~3 seconds.
≦0.2mΩ
>95% coverage
Soldering Profile
12. Packing of Surface Mount Resistors
12.1 Embossed Dimensions:(Unit: mm)
Type
Resistance
Range
LR05
1~15mΩ
LR06
LR12
1mΩ
2~100mΩ
0.5mΩ
1~500mΩ
W
P
E
F
φD1
G
H
A
B
T1
T
8.0±0.30
4.0±0.10
1.75±0.10
3.5±0.10
1.0±0.10
4.0±0.10
2.0±0.10
2.03±0.10
3.55±0.10
0.80±0.20
0.20±0.05
8.0±0.30
4.0±0.10
1.75±0.10
3.5±0.10
1.0±0.10
4.0±0.10
2.0±0.10
2.03±0.10
3.55±0.10
12.0±0.30
4.0±0.10
1.75±0.10
5.5±0.10
1.55±0.10
4.0±0.10
2.0±0.10
3.50±0.10
6.80±0.10
φD
1.50
.
1.10±0.10
0.85±0.10
1.10±0.10
0.90±0.10
0.20±0.05
0.20±0.05
LR25
0.25~3mΩ
12.0±0.30
8.0±0.10
1.75±0.10
5.5±0.10
1.55±0.10
4.0±0.10
2.0±0.10
6.81±0.10
7.16±0.10
1.05±0.10
0.25±0.05
LR28
4~450mΩ
12.0±0.30
8.0±0.10
1.75±0.10
5.5±0.10
1.55±0.10
4.0±0.10
2.0±0.10
7.10±0.10
7.05±0.10
0.95±0.10
0.20±0.05
LR27
0.5~500mΩ
24.0±0.30
12.0±0.10
1.75±0.10
11.5±0.10
1.50±0.10
4.0±0.10
2.0±0.10
7.38±0.10
12.0±0.10
1.05±0.10
0.30±0.10
Apr.02,2020
V.1
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Page 7/8
Metal Strip Chip Resistors
12.2 Dimension of Reel：(Unit: mm)
13.
Type
Taping
Qty/Reel
A
ΦB
ΦC
ΦD
W
ΦM
LR05
Embossed
5,000pcs
2.0±0.5
13.0±0.5
21.0±0.5
60.0±1.0
10.0±1.0
178±2.0
LR06
Embossed
5,000pcs
2.0±0.5
13.0±0.5
21.0±0.5
60.0±1.0
10.0±1.0
178±2.0
LR12
Embossed
4,000pcs
2.0±0.5
13.0±0.5
21.0±0.5
60.0±1.0
13.8±1.0
178±2.0
LR25
Embossed
2.5±0.5
13.5±0.5
17.7±0.5
60.0±1.0
16.2±1.0
178±2.0
LR28
Embossed
2.5±0.5
13.5±0.5
17.7±0.5
60.0±1.0
16.2±1.0
178±2.0
LR27
Embossed
2.0±0.5
13.2±0.5
17.7±0.5
60.0±1.0
24.4±2.0
178±2.0
2,000pcs
1,000pcs
2,000pcs
1,000pcs
1,000pcs
500pcs
Note
13.1 UNI-ROYAL recommend the storage condition temperature: 25±5℃, humidity :60±20%.
(Put condition for individual product).
Even under UNI-ROYAL recommended storage condition, solderability of products over 1 year old. (Put condition for each product) may be
degraded.
13.2 Store / transport cartons in the correct direction, which is indicated on a carton as a symbol.
Otherwise bent leads may occur due to excessive stress applied when dropping of a carton.
13.3 Product performance and soldered connections may deteriorate if the products are stored in the following places:
a. Storage in high Electrostatic.
b. Storage in direct sunshine、rain and snow or condensation.
c. Where the products are exposed to sea winds or corrosive gases, including Cl2, H2S3 NH3, SO2, NO2.
14.
Record
Version
Description
Page
Date
Amended by
Checked by
1
First version
1~8
Apr.02, 2020
Haiyan Chen
Yuhua Xu
V.1
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Apr.02,2020
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