Low Resistance Value Chip Resistors
Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
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Product Code Size, Power Rating
Type: inch
M1W : 2512 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 m?=3M0, 10 m?=10M
Resistance Value
Packaging Methods
Code
U
Packaging
Embossed Carrier Taping
4 mm pitch, 3,000 pcs.
Thick Film
Chip Resistors
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Product Code Size, Power Rating
Type: inch
M03 : 0603 0.25 W
Power R.
Code
N
Type
General type
Resistance Tolerance
Code
F
J
Tolerance
± 1 %
± 5 %
Packaging Methods
Code
V
Packaging
Punched Carrier Taping
4 mm pitch, 5,000 pcs.
Thick Film
Chip Resistors
Shown by 3 digits or letters.
Decimal point is expressed by M as 10 m?=10M
Resistance Value
■ Explanation of Part Numbers
■ Features
● 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
Low Resistance Value Chip Resistors(Current Sensing Resistors)
0603, 2512
Type: ERJM03
ERJM1W
●ERJM1W
●ERJM03
■ Packaging Methods, Land Pattern, Soldering Conditions and Safety Precautions
Please see Data Files
Aug. 201201
14
Design and specifi cations are each subject to change without notice. Ask factory for the current technical specifi cations before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
Low Resistance Value Chip Resistors
Terminal; Plated Metal
Resistive Body; Alloy Plate
Protective coating; Resin
L
WT
a
120
100
80
60
40
20
0
–55 –40 0 40 80
70 °C
120 160
170 °C
200
Ambient Temperature (°C)
Rated Load (%)
ERJM03
ERJM1W
155 °C
Resistive Body; Alloy Plate
Protective coating; Resin
Terminal; Plated Metal
L
WT
a
b
Type Type
(inch size)
Dimensions (mm)
LWT a
Mass (Weight)
[g/1000 pcs.]
S Type ERJM1WS
(2512) 6.40±0.25
3.20±0.25 0.80±0.30
1.00±0.25 70
T Type ERJM1WT
(2512) 6.40±0.40 2.10±0.30 90
Type
(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
ERJM03N
(0603) 0.25 10
F: ±1, J: ±5
±10 0
–
55 to +155
–
ERJM1WS
(2512)
1
3, 4 ±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
Power Derating Curve
For resistors operated in ambient temperatures above
70 °C, power rating shall be derated in accordance
with the fi gure on the right.
■ Ratings
✽ Please contact the factory for other values and the range
■ Dimensions in mm (not to scale)
■ Construction
Type
(inch size)
Dimensions (mm)
Mass (Weight)
[g/1000 pcs.]
LWT a b
ERJM03N
(0603) 1.60±0.15 0.8±0.15 0.35±0.10 0.45±0.15 0.65±0.15 1.7
●ERJM1W●ERJM03
●ERJM1W●ERJM03
Aug. 201201
15
