DATA SHEET
Product Name Metal Foil Chip Resistors
Part Name MS 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 (kunshan) co., ltd.
Uniroyal Electronics Industry Co., Ltd.
Uniroyal Electronics Global Co.,Ltd Shenzhen Branch
Aeon Technology Corporation
Uniroyal Electronics Global Co.,Ltd Xiamen Branch
Kunshan Foss Electronic material Co., Ltd.
Royal Electronic Factory (thailand) co., ltd
Brands
RoyalOhm
UniOhm
Metal Foil Chip Resistors - Data Sheet
1. Scope
1.1 This specification for approve relates to the Metal Foil Chip Resistors manufactured by UNI-ROYAL.
1.2 High power rating.
1.3 Ultra low resistance value.
1.4 Excellent frequency response.
1.5 Excellent temperature coefficient characteristics.
1.6 RoHS compliant
2. Part No. System
Part No. includes 14 codes shown as below:
2.1 1st~4th codes: Part name. E.g.: MS05 , MS06 , MS10, MS12
2.2 5th~6th codes: Power rating.
E.g.: W=Normal Size
“1~G” = “1~16”
Wattage
Normal Size
1/2
W2
1
1W
1.5
1A
2
2W
3
3W
2.3 7
th
code: Tolerance. E.g.: F=±1%
J=±5%
th
th
2.4 8 ~11 codes: Resistance Value.
2.4.1 If value belongs to standard value of
≥5%
series, 8
th
code would be zero,9
th
~10
th
codes are significant figures of the resistance and 11
th
code
is the power of ten.
2.4.2 If value belongs to standard value of
≤2%
series, 8
th
~10
th
codes are significant figures of the resistance, and 11
th
code is the power of ten.
2.4.3 11
th
codes listed as following:
0=10
0
1=10
1
2=10
2
3=10
3
4=10
4
5=10
5
6=10
6
J=10
-1
K=10
-2
L=10
-3
M=10
-4
N=10
-5
P=10
-6
2.5 12
th
~14
th
codes.
2.5.1 12
th
code: Packaging Type. E.g.: T=Tape/Reel
2.5.2 13
th
code: Standard Packing Quantity.
4=4000pcs 5=5000pcs
th
2.5.3 14 code: Special features.
E = Black Marking. S=White Marking
3. Ordering Procedure
(Example: MS12 3W ±1% 10mΩ T/R-4000)
M
S 1 2
3
W
F
1
0
0
M
T
4
E
Product Type:
Fill-in 4 digits with
the chip resistor
type as follows:
MS05=0805
MS06=1206
MS10=2010
MS12=2512
Wattage:
Normal size:
W2=1/2W
1W=1W
1A=1.5W
2W=2W
3W=3W
Resistance Value:
5% series:
The 1st digit will be “0”; the 2
nd
& 3
rd
digits are for the significant
figures of the resistance and the
4
th
digit indicate the numbers of
zeros following.
1%series:
The 1st to 3
rd
digits are for the
significant figures of the
resistance and 4th digit denotes
number of zeros following.
J=10
-1
; K=10
-2
; L=10
-3
M=10
-4
Packing quantity:
4=4000PCS
5=5000PCS
Special Feature
E= Black Marking
S=White Marking
N=10
-5
Tolerance:
F=±1% ;
J=±5%
Packing Type:
T=Tape/Reel
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Metal Foil Chip Resistors - Data Sheet
4. Marking
The first digit . Is “R” which as decimal point.
R010
10m
5. Dimension
E = Black Marking
S=White Marking
Type
70℃
Power
L
W
Dimension(mm)
H
A
B
0.65±0.15
Resistance Range
±1%&±5%
5 mΩ~9mΩ
12 mΩ~13mΩ
15mΩ~30mΩ
10mΩ
7mΩ
5mΩ~6mΩ 8mΩ 9mΩ
27mΩ~35mΩ
0.46±0.25
1.45±0.30
1.25±0.30
10mΩ~25mΩ
37mΩ~51mΩ
6mΩ
4mΩ 7mΩ
5mΩ 8mΩ 9mΩ 10mΩ
11mΩ~25mΩ 150mΩ
0.65±0.30
30mΩ~100mΩ
1mΩ
2mΩ
3mΩ
4mΩ 7mΩ 8mΩ
5mΩ
6mΩ 9mΩ~15mΩ
16mΩ~100mΩ
101mΩ~200mΩ
T.C.R
PPM/℃
MS05
1/2W
2.00±0.30
1.20±0.30
0.60±0.20
≤1.0
0.57±0.15
0.42±0.15
±150
1W
2.00±0.30
1.20±0.30
0.60±0.20
≤1.0
0.42±0.15
0.86±0.25
0.76±0.25
±50
±100
±100
±50
±100
±50
±50
±50
±30
±30
MS06
1W
3.10±0.20
1.60±0.30
0.70±0.20
≤1.0
MS10
1.5W
5.00±0.20
2.50±0.25
0.70±0.20
≤1.0
1.00±0.30
1.00±0.20
≤1.0
2.55±0.30
1.75±0.30
2.15±0.30
MS12
3W
6.35±0.20
3.20±0.25
0.70±0.20
≤1.0
1.75±0.30
1.35±0.30
1.15±0.30
0.90±0.30
±50
2W
6.35±0.20
3.20±0.25
0.70±0.20
≤1.0
0.90±0.30
Feb.16,2019 V.5
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Metal Foil Chip Resistors - Data Sheet
6. Structure
1
2
3
Marking
Alumina Substrate
Protective layer
4
5
Resistance layer
Terminal (Cu/Ni/ Sn)
7. Recommend land pattern
Dimension(mm)
L
1.20±0.05
1.40±0.10
3.60±0.10
2.20±0.10
b
1.20±0.05
1.90±0.10
1.40±0.10
3.40±0.10
a
1.2±0.05
1.80±0.10
3.00±0.10
4.00±0.10
Type
MS05
MS06
MS10
MS12
8. Derating Curve
Resistors shall have a power rating based on continuous load operation at an ambient temperature from -55℃ to 70℃. For temperature in excess
of 70℃, the load shall be derated as shown in figure 1
8.1 Voltage rating:
Resistors shall have a rated direct-current (DC) continuous working
Voltage or an approximate sine-wave root-mean-square (RMS) alternating-current (AC) continuous working voltage at commercial-line frequency
and waveform corresponding to the power rating, as determined from the following formula:
RCWV =
P
R
Where: RCWV commercial-line frequency and waveform (Volt.)
P = power rating (WATT.) R = nominal resistance (OHM)
In no case shall the rated DC or RMS AC continuous working voltage be greater than the applicable maximum value.
The overload voltage is 2.5 times RCWV or Max. Overload voltage whichever is less
Feb.16,2019 V.5
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Metal Foil Chip Resistors - Data Sheet
9. Performance Specification
Test Methods
(GB/T5729&JIS-C-5201&IEC60115-1)
4.8 Natural resistance changes per temp. Degree centigrade
R
2
-R
1
× 10
6
(PPM/℃)
R
1
(t
2
-t
1
)
R
1
: Resistance Value at room temperature
（t
1
）;
R
2
: Resistance at test temperature
(Upper limit temperature or Lower limit temperature
)
t
1:
+25°C or specified room temperature
t
2:
Upper limit temperature or Lower limit temperature test temperature
Characteristic
Limits
Temperature
Coefficient
Refer to item 5.0
1%
Short-time overload
5%
Low Temperature
Storage
High Temperature
Exposure
±(1.0%+0.001Ω)
±(2.0%+0.001Ω)
4.13 Permanent resistance change after the application of a potential of 5
times rated power for 5 seconds.
±(1.0%+0.001Ω)
±(1.0%+0.001Ω)
4.23.4 Lower limit temperature，for 1000H
4.23.2 Upper limit temperature
，for
1000H
4.17 The surface of solder must be new, smooth, clean,
shiny and continuous, and without concentrated pinholes. The solder’s
temperature must be within 245±3℃.Hold in hot solder 2~3seconds.
Solderability
More than 95% coverage rate
soldering heat
Load life
±(0.5%+0.005Ω)
1%
5%
1%
(1%+0.001)
(3%+0.001)
(1.0%+0.001)
4.18 Dipped into solder at 260℃for 10 seconds.
4.25.1 Permanent resistance change after 1,000 hours operating at rated
power at 70±2℃, 1.5hrs ON ,0.5hrs OFF.
Load life in humidity
5%
(3.0%+0.001)
7.9 402℃,1000hrs at rated power,90~95%RH , 1.5hrs ON,0.5hrs OFF
10. Packing of Surface Mount Resistors
10.1 Dimension of Paper Taping :(Unit: mm)
Type
MS05
MS06
A
±0.2
1.65
2.00
B
±0.2
2.40
3.60
C
±0.05
2.00
2.00
+0.1Φ
D
-0
1.50
1.50
E
±0.1
1.75
1.75
F
±0.05
3.50
3.50
G
±0.1
4.00
4.00
W
±0.2
8.00
8.00
T
±0.1
0.81
0.81
Feb.16,2019 V.5
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