Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Current Sensing Resistors, Metal Plate Type
E
1
R
2
J
3
M
4
1
5
W
6
S
7
F
8
3
9
M
10
0
11
U
12
Product Code
Size, Power Rating
Code
M1W 1 W
Power R.
Code
S
T
Type
General type
Wide terminal type
Resistance Tolerance
Code
F
J
Tolerance
± 1 %
± 5 %
Shown by 3 digits or letters.
Decimal point is expressed by M as 3 mΩ=3M0, 10 mΩ=10M
Resistance Value
Packaging Methods
Code
U
Packaging
Embossed Carrier Taping
4 mm pitch, 3,000 pcs.
Thick Film
Chip Resistors
Inch
2512
120
100
80
60
40
20
0
–55 –40 0 40 80
70 °C
120 160
170 °C
200
Ambient Temperature (°C)
Rated Load (%)
155 °C
■
As for Packaging Methods, Soldering Conditions and Safety Precautions,
Please see Data Files
Features
Current Sensing Resistors,
Metal Plate Type
Type: ERJM1W
●
Low resistance values and high precision (1 mΩ to 20 mΩ)
●
Stable resistance not infl uenced by measurement position
●
High heat emission
●
Low profi le, strong body
●
Inductance less than 1.0 nH for the metal plate structure
●
RoHS compliant
✽ Please contact the factory for other values and the range
Explanation of Part Numbers
Ratings
Power Derating Curve
For resistors operated in ambient temperatures above
70 °C, power rating shall be derated in accordance
with the figure on the right.
Part No.
(inch size)
Power Rating
at 70 °C (W)
Standard
Resistance (mΩ)
Resistance
Tolerance (%)
T.C.R.
(×10
-6
/°C)
Category
Temperature
Range
(°C)
Circuit board of use
ERJM1WS
(2512)
1
3, 4
F: ±1, J: ±5
±350
–
55 to +170
You should use the
aluminum substrate
when the added
watt age exceeds 0.5 W.
5, 6, 10, 15, 20 ±100
ERJM1WT
(2512)
1, 1.5 350±100
2, 3, 4 100±50
Oct. 201408
