Current Sensing Chip Resistor
CSR Series
MERITEK
Feature and Applications
Low TCR of ±100 PPM/°C
Resistance values from 1m to 1 ohm
3 Watts power rating in 1 Watt size, 1225 package
High purity alumina substrate for high power dissipation
Long side terminations with higher power rating
Power Management Applications
Switching Power Supply
Over Current Protection in Audio Applications
Voltage Regulation Module (VRM)
DC-DC Converter, Battery Pack, Charger, Adaptor
Automotive Engine Control
Disk Driver
P
ART
N
UMBERING
S
YSTEM
CSR
Current Sensing Chip Resistors
SIZE
0201 0402 0603 0805 1206 1210
2010 2512 1225 3720 7520
TCR (PPM/°C)
E
F
G
H
J
K
R
±100
±200
±300
±400
±600
±150 ±1000
Power Rating
S
A
T
Q
U
V
W
2W
1.5W
1W
3/4W
1/2W
1/4W
1/8W
Resistance Value
R010
0.01Ω
Resistance Tolerance
Code
F
Value
±1%
0603
G
U
1001 C
R100
0.1Ω
G
±2%
J
±5%
1R00
1Ω
Derating Curve
100
Power ratio(%)
80
60
40
20
0
0
20
40
60
80
100
120
140
160
180
Ambient Temperature(℃)
Rev. 7
Current Sensing Chip Resistor
CSR Series
MERITEK
Construction
L
D1
w
T
D2
Alumina Substrate
Bottom Electrode (Ag)
Top Electrode (Ag-Pd)
Edge Electrode (NiCr)
Barrier Layer (Ni)
External Electrode (Sn)
Resistor Layer (Ag/Pd)
Primary Overcoat (Glass)
Secondary Overcoat (Epoxy)
Type
CSR0201
CSR0402
CSR0603
CSR0805
CSR1206
CSR1210
CSR2010
CSR2512
CSR2512
(2W)
CSR2512
(2W)
CSR1225
CSR3720
CSR7520
Size
(Inch)
0201
0402
0603
0805
1206
1210
2010
2512
2512
(10 - 99mΩ)
L
0.60±0.03
1.00±0.05
1.60±0.10
2.00±0.10
3.10±0.10
3.10±0.10
5.00±0.10
6.35±0.10
6.35±0.20
6.35±0.20
3.10±0.15
2.00±0.20
2.00±0.20
W
0.30±0.03
0.50±0.05
0.80±0.10
1.25±0.10
1.55±0.10
2.60±0.15
2.50±0.15
3.10±0.15
3.15±0.15
3.15±0.15
6.30±0.15
3.75±0.20
7.50±0.30
T
0.23±0.05
0.32±0.10
0.45±0.10
0.55±0.10
0.55±0.10
0.55±0.10
0.60±0.15
0.60±0.10
0.74±0.10
0.74±0.10
0.90±0.15
0.60±0.10
0.60±0.10
D1
0.12±0.05
0.25±0.10
0.30±0.20
0.30±0.20
0.50±0.30
0.50±0.30
0.60±0.30
0.60±0.30
0.60±0.30
0.60±0.30
0.60±0.30
0.40±0.20
0.40±0.20
D2
0.15±0.05
0.20±0.10
0.30±0.20
0.40±0.25
0.40±0.25
0.50±0.25
0.50±0.25
0.55±0.25
0.55±0.25
2.10±0.10
0.55±0.25
0.40±0.20
0.40±0.20
Unit: mm
Weight
(g)
(1000pcs)
0.18
0.7
1.99
5.3
8.82
15.5
27.03
43.08
53.08
53.08
64.88
19.96
35.71
2512
(100 - 1000mΩ)
1225
3720
7520
Rev. 7
Current Sensing Chip Resistor
CSR Series
MERITEK
Standard Electrical Specifications
Item
Type
CSR0201
CSR0402
Power Rating
at 70°C
1/20W
1/16W
Operating Temp.
Range
Resistance Range
(mΩ)
±1%
±2%
±5%
100 - 149
150 - 500
501 - 1000
50 - 100
101 - 500
501 - 1000
20 - 50
51 - 100
101 - 500
501 - 1000
20 - 50
51 - 100
101 - 500
501 - 1000
10 - 20
21 - 50
51 - 99
100 - 1000
3-5
6 - 20
21 - 30
31 - 250
251 - 8000
10 - 19
20 - 500
－
1-4
5 - 10
11 - 350
TCR
(PPM/°C)
±1000
±600
±300
±400
±300
±200
±600
±400
±300
±200
±600
±400
±300
±200
±600
±400
±300
±200
±300
±200
±150
±100
±200
±300
±150
±300
±200
±150
CSR0603
1/10W
CSR0805
CSR1206
CSR1210
CSR2010
CSR2512
CSR1225
1/8W
1/4W
1/2W
3/4W
1W
3W
-55 ~ +155C
CSR3720
CSR7520
1W
2W
High Power Rating Electrical Specifications
Item Power Rating
at 70°C
Type
CSR0402
CSR0603
CSR0805
CSR1206
CSR1210
CSR2010
CSR2512
CSR2512
1/8W
1/8W
1/4W
1/2W
3/4W
1W
1.5W
2W
-55 ~ +155C
10 - 20
21 - 50
51 - 99
100 - 1000
±600
±400
±300
±200
Operating Temp.
Range
Resistance Range
(mΩ)
±1%
±2%
51 - 100
101 - 500
501 - 1000
±5%
TCR
(PPM/°C)
±400
±300
±200
Rev. 7
Current Sensing Chip Resistor
CSR Series
MERITEK
Low TCR Electrical Specifications
Item
Type
CSR0805
CSR1206
CSR1210
CSR2010
CSR2512
CSR2512
CSR3720
CSR7520
Power Rating
at 70°C
1/8W
1/4W
1/2W
3/4W
1W
2W
1W
2W
Operating Temp.
Range
Resistance Range
(mΩ)
±1%
±2%
100 - 1000
100 - 1000
75 - 1000
50 - 1000
±5%
TCR
(PPM/°C)
±100
±100
±100
±100
±100
±100
±100
±100
-55 ~ +155C
20 - 1000
50 - 1000
100 - 500
50 - 350
Operating Voltage=√(P*R) ; Overload Voltage=2.5*√(P*R) ; Operating Current=√(P/R)
Soldering Condition
IR Reflow Soldering
(1)Time of IR reflow soldering at maximum temperature point 260C：10s
(2)Time of wave soldering at maximum temperature point 260C：10s
(3)Time of soldering iron at maximum temperature point 410C：5s
Wave Soldering (Flow Soldering)
Rev. 7
Current Sensing Chip Resistor
CSR Series
MERITEK
Environmental Characteristics
Item
Requirement
Test Method
JIS C 5201-1 4.8
Temperature Coefficient of Resistance
As Spec.
(T.C.R.)
IEC 60115-1 4.8
-55C~+125C, 25C is the reference temperature
(0.5%+0.05Ω)
Short Time Overload
(1.0%+0.05Ω)
for high power rating
JIS C 5201-1 4.13
IEC 60115-1 4.13
RCWV*2.5 or Max. overload voltage for 5 seconds
JIS C 5201-1 4.6
IEC 60115-1 4.6
Max. overload voltage for 1 minute
JIS C 5201-1 4.25
IEC 60115-1 4.25.1
702C, Max. working voltage for 1000 hrs with 1.5 hrs “ON”
and 0.5 hrs “OFF”
JIS C 5201-1 4.24
402C, 90~95% R.H., Max. working voltage for 1000 hrs
with 1.5 hrs “ON” and 0.5 hrs “OFF”
JIS C 5201-1 4.23.2
IEC 60115-1 2.23.2
at +155C for 1000 hrs
Insulation Resistance
≧10G
Endurance
(1.0%+0.05Ω)
Damp Heat with Load
(0.5%+0.05Ω)
Dry Heat
(0.5%+0.05Ω)
JIS C 5201‐1 4.33
Bending Strength
As Spec.
IEC 60115-1 4.33
Bending once for 5 seconds with 3mm
2010, 2512 sizes: 2 mm
Solderability
95% min. coverage
JIS C 5201-1 4.17
IEC 60115-1 4.17
2455C for 3 seconds
JIS C 5201-1 4.18
IEC 60115-1 4.18
2605C for 10 seconds
JIS C 5201-1 4.7
IEC 60115-1 4.7
1.42 times RCWV (RMS) for 1 minute
JIS C 5201-1 4.18
IEC 60068-2-58 8.2.1
2605C for 30 seconds
JIS C 5201-1 4.19
IEC 60115-1 4.19
-55C to +155C, 5 cycles
Resistance to Soldering Heat
(0.5%+0.05Ω)
Voltage Proof
No breakdown or flashover
Leaching
Individual leaching area
≦5%
Total leaching area
≦10%
Rapid Change of Temperature
(0.5%+0.05Ω)
Storage Temperature: 25±3°C; Humidity < 80%RH
Rev. 7
