CSM Series

 CSM Series
Current Sensing Metal Chip
Resistor
MERITEK
Feature and Applications
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SMD Type designed for automatic insertion
High power rating in small size
Low resistance resistor for current detection
Metal foil construction ensures high reliability and performance with very
low and stable TCR
Designed for current sense circuits in power electronic systems
Pb-Free to Meet RoHS Requirement
Power Management Application
Switching Power Supply
Over Current Protection in audio Application
Voltage Regulation Module (VRM)
DC-DC converter, Battery Pack, Charger, Adaptor
PART NUMBERING SYSTEM
CSM
0805
D
V
R100 F
Current Sensing Metal Chip Resistors
SIZE
0805
1206
2010
2512
TCR (PPM/°C)
D
E
±50
±100
Power Rating
T
Q
U
1W
3/4W
1/2W
Resistance Value
R010
0.01Ω
Power ratio(%)
Resistance Tolerance
Code
F
Value
±1%
V
1/4W
R100
0.1Ω
G
±2%
1R00
1Ω
J
±5%
Derating Curve
100
80
60
40
20
0
0 20 40 60 80 100 120 140
Ambient Temperature(℃)
Construction
160
180
Alumina Substrate 
Barrier Layer (Ni) 
Bottom Electrode (Cu) 
External Electrode (Sn) 
Marking (Epoxy) 
Adhesive (Acrylic) 
 Resistor Layer (Alloy) 
 Top Electrode (NiCr) 
Edge Electrode (NiCr) 
Primary Overcoat (Epoxy) 
Rev. 7
CSM Series
Current Sensing Metal Chip
Resistor
MERITEK
Unit: mm
Type
Size
(Inch)
CSM0805
0805
CSM1206
1206
CSM2010
2010
CSM2512
2512
Resistance Range
(mΩ) L
W
T
D1
D2
10 - 29
2.00±0.15
1.25±0.15
0.55±0.10
0.30±0.20
0.50±0.20
30 - 100
2.00±0.15
1.25±0.15
0.52±0.10
0.30±0.20
0.35±0.20
10 - 29
3.05±0.15
1.55±0.15
0.58±0.15
0.50±0.25
0.90±0.25
30 - 100
3.05±0.15
1.55±0.15
0.55±0.15
0.50±0.25
0.60±0.25
10 - 29
5.00±0.20
2.50±0.20
0.58±0.15
0.60±0.30
1.50±0.30
30 - 100
5.00±0.20
2.50±0.20
0.55±0.15
0.60±0.30
0.90±0.30
10 - 29
6.30±0.20
3.15±0.20
0.58±0.15
0.60±0.30
1.80±0.30
30 - 100
6.30±0.20
3.15±0.20
0.55±0.15
0.60±0.30
1.20±0.30
Standard Electrical Specifications
Item
Type
Power Rating
at 70°C
CSM0805 (0805)
CSM1206 (1206)
Operating Temp.
Range
Resistance Range
(mΩ)
±1%
±2%
±5%
TCR
(PPM/°C)
10 - 19
±100
20 - 100
±50
±100
10 - 19
±100
20 - 100
±50
±100
10 - 19
±100
20 - 100
±50
±100
10 - 19
±100
20 - 100
±50
±100
1/4W
1/2W
-55 ~ +155C
CSM2010 (2010)
CSM2512 (2512)
3/4W
1W
Soldering Condition IR Reflow Soldering
Wave Soldering (Flow Soldering)
(1)Time of IR reflow soldering at maximum temperature point 260C：10s
(2)Time of wave soldering at maximum temperature point 260C：10s
(3)Time of soldering iron at maximum temperature point 410C：5s
Rev. 7
Current Sensing Metal Chip
CSM Series
Resistor
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
-55C~+125C, 25C is the reference temperature
Short Time Overload
(0.5%+0.05Ω)
5 X Rated Power for 5 seconds
Insulation Resistance
≧10G
JIS C 5201-1 4.6
IEC 60115-1 4.6
Max. overload voltage for 1 minute
Endurance
(1.0%+0.05Ω)
JIS C 5201-1 4.25
IEC 60115-1 4.25.1
702C, Max. working voltage for 1000 hrs with 1.5 hrs “ON”
and 0.5 hrs “OFF”
Damp Heat with Load
(1.0%+0.05Ω)
JIS C 5201-1 4.24
402C, 90~95% R.H., Max. working voltage for 1000 hrs
with 1.5 hrs “ON” and 0.5 hrs “OFF”
Dry Heat
(0.5%+0.05Ω)
JIS C 5201-1 4.23.2
IEC 60115-1 2.23.2
at +155C for 1000 hrs
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
2455C for 3 seconds
Resistance to Soldering Heat
(0.5%+0.05Ω)
JIS C 5201-1 4.18
IEC 60115-1 4.18
2605C for 10 seconds
Voltage Proof
No breakdown or flashover
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
Leaching
Individual leaching area ≦5%
Total leaching area ≦10%
IEC 60068‐2‐58 8.2.1 2605C for 30 seconds
Rapid Change of Temperature
(0.5%+0.05Ω)
JIS C 5201-1 4.19
IEC 60115-1 4.19
-55C to +155C, 5 cycles
Storage Temperature: 25±3°C; Humidity < 80%RH
Rev. 7
CSM Series
Current Sensing Metal Chip
Resistor
MERITEK
Packaging Packaging Quantity & Reel Specifications
Unit :mm
Type
ΦA
ΦB
ΦC
W
T
Paper
Tape (EA)
Emboss
Plastic
Tape (EA)
CSM0805
178.0±1.0
60.0+1.0
13.5±0.7
9.5±0.1
11.5±1.0
5,000
-
CSM1206
178.0±1.0
60.0+1.0
13.5±0.7
9.5±0.1
11.5±1.0
5,000
-
CSM2010
178.0±1.0
60.0+1.0
13.5±0.7
13.5±1.0
15.5±1.0
-
4,000
CSM2512
178.0±1.0
60.0+1.0
13.5±0.7
13.5±1.0
15.5±1.0
-
4,000
Paper Tape Specifications
T o p T ap e
B o tto m T ap e
ψ D0
E
A
F
B
T
P ap er T ap e
P1
R esisto r
P2
P0
W
d irectio n o f u n reelin g
Unit: mm Type
A
B
W
E
F
P0
P1
P2
ΦD0
T
CSM0805
1.60±0.10
2.40±0.20
8.0±0.20
1.75±0.10
3.50±0.05
4.00±0.10
4.00±0.05
2.00±0.05
1.50+0.1,-0
0.85±0.10
CSM1206
1.90±0.10
3.50±0.20
8.0±0.20
1.75±0.10
3.50±0.05
4.00±0.10
4.00±0.05
2.00±0.05
1.50+0.1,-0
0.85±0.10
Rev. 7
CSM Series
Current Sensing Metal Chip
Resistor
MERITEK
Emboss Plastic Tape Specifications
Top Tape
ψ D0
E
A
F
B
W
ψ D1 1.4Min.
T
P1
Resistor
P2
P0
direction of unreeling
Emboss Tape
Unit: mm Type
A
B
W
E
F
P0
P1
P2
ΦD0
T
CSM2010
2.80±0.10
5.50±0.10
12.0±0.30
1.75±0.10
5.5±0.05
4.00±0.05
4.00±0.10
2.00±0.05
1.50+0.10
1.00±0.20
CSM2512
3.50±0.10
6.70±0.10
12.0±0.30
1.75±0.10
5.5±0.05
4.00±0.05
4.00±0.10
2.00±0.05
1.50+0.10
1.00±0.20
Recommend Land Pattern
Unit：mm
Type
CSM0805
C CSM1206
B A CSM2010
CSM2512
Resistance
Range
A
B
C
10-29mΩ
0.80
1.10
1.35
30-100mΩ
1.00
1.00
1.35
10-29mΩ
0.9
1.70
1.70
30-100mΩ
1.50
1.40
1.70
10-29mΩ
1.70
2.35
2.50
30-100mΩ
2.80
1.80
2.50
10-29mΩ
2.30
2.90
3.10
30-100mΩ
3.60
2.25
3.10
Rev. 7