Metal Film Milli-Ohm Chip
Resistor (CRM)
Document No.
Issued Date
Page
CRM
2009/01/09
1 / 10
Metal film milli-ohm (10~300m
Ω
) chip resistors (CRM) are made in chip size
from 0201 to 2512
for Calchip.
These resistors apply as current detecting resistor for
applications such as power supplies, computers, HDDs, Cellular telephones, etc.
1. Features
Low Resistance and High Accuracy Resistor for Current Detection
Homogeneous Ni Alloy Films
High Purity Alumina Substrate for High Power Dissipation
Pb-free to Meet RoHS Requirements
2. Applications
Power Management Applications
Switching Power Supply
DC-DC Converter, Battery Pack, Charger, Adaptor
Portable Instruments (PDA and Cell Phone)
Voltage Regulation Module (VRM)
Computer
3. Construction:
Over Coat
Conductor
(Lead-free)
Sn Plating
Resistive Element
Ceramic Substrate
Ni Plating
Cal-Chip Electronics, INC.
Metal Film Milli-Ohm Chip
Resistor (CRM)
Document No.
Issued Date
Page
CRM
2009/01/09
2 / 10
4. Type Designation:
CRM
12
F
R010
CT
Metal Film Milli-Ohm
Chip Resistor
Size/Power Rating
02 =
0201
04 =
0402
06
= 0603
10 =
0805
12 =
1206
20 =
2010
25 =
2512
Tolerance
F :
±1%
G :
±2%
J :
±5%
Resistance
Packaging
RoHS
CT : Tape & Reel
CT-LF : Tape &
Ω
Reel, Lead-free
R010 : 10m
5. Ratings, Characteristics, and Dimensions:
Chip
Size
Power
TCR
Rating (ppm/
o
C)
±
700
0201
0.1W
±
500
±
300
±
500
0402 0.125W
±
300
±
200
±
500
0603
0.2W
±
350
± 150
±
500
0805
0.25W
±
350
± 150
±
400
1206
0.5W
±
250
± 150
−
Resistance Range (mΩ)
F:±1% G:±2% J:±5%
−
−
36~100
101~300
−
33∼43
47~300
10~30
33~43
47~300
10~30
33~43
47~300
10~30
33~43
47~91
100~300
3.1±0.2 1.60±0.10 0.62±0.10
0.4±0.3 0.40±0.20
3.1±0.2 1.60±0.10 0.62±0.10
1.0±0.3 0.40±0.20
2.0±0.1 1.30±0.10 0.57±0.10 0.35±0.2 0.40±0.20
1.6±0.1 0.85±0.10 0.48±0.10 0.3±0.2 0.30±0.20
20~30
1.0±0.1 0.55±0.05 0.38±0.05 0.2±0.1 0.25±0.10
20~33
Operating
Temp. Range
-55
o
C~+125
o
C
0.6±0.03 0.3±0.03 0.27±0.05 0.12±0.05 0.15±0.05
Dimension (mm)
L
W
t
c
d
Cal-Chip Electronics, INC.
Metal Film Milli-Ohm Chip
Resistor (CRM)
±
400
2010
0.75W
±
250
± 150
±
400
2512
1W
±
250
± 150
10~30
33~43
47~91
100~300
10~30
33~43
47~91
100~300
Document No.
Issued Date
Page
CRM
2009/01/09
3 / 10
5.0±0.2 2.60±0.20 0.62±0.10 1.7±0.3
0.5±0.25
5.0±0.2 2.60±0.20 0.62±0.10 0.6±0.3
0.5±0.25
6.3±0.2 3.20±0.20 0.62±0.10 1.9±0.3
0.5±0.25
6.3±0.2 3.20±0.20 0.62±0.10 0.6±0.3
0.5±0.25
Derating Curve :
For resistors operated at ambient temperature over 70℃, power rating shall be derated in
accordance with figure 1.
P max.
Power Ratio (%)
100
50
0
-55
50
70
100
125
Ambient Temperature (
o
C)
Figure 1
Cal-Chip Electronics, INC.
Metal Film Milli-Ohm Chip
Resistor (CRM)
Document No.
Issued Date
Page
CRM
2009/01/09
4 / 10
6. Marking:
From 0805 to 2512:
Resistance value is expressed by 4 digits, the first “R” means decimal point and the other
digits represent for the normal resistance in
Ω.
eg., 15mΩ= R015, 100mΩ= R100,
For 0603:
The marking of
CRM06
can not represent by 4 digits but by 3 digits.
(a) Resistance value higher than or equals to 100mΩ is represented by E96 series. However,
for resistance value not in the list of E96, 3 digitals with underline in E24 series is used.
eg., 100mΩ= 01Z, 200mΩ= 08Z, 120mΩ= 012
(b) Resistance value lower than 100mΩ is represented by 2 digits plus a symbol L.
eg., 10mΩ= 10L, 20mΩ= 20L, 47mΩ= 47L
For 0402 and 0201: No Marking.
Cal-Chip Electronics, INC.
Metal Film Milli-Ohm Chip
Resistor (CRM)
Document No.
Issued Date
Page
CRM
2009/01/09
5 / 10
7. Reliability Tests: (
As specified in JIS C 5202
)
Test Items
TCR
(Temperature Coefficient of Resistance)
Condition of Test
-55 ~ +125
o
C
2.5 X rated voltage, 5s
o
Test Limits
Refer to paragraph 5
0201:± (2%+0.001
Ω
)
others:
±
(1%+0.001
Ω
)
Reference
standard
JIS-C5202 - 5.2
JIS-C5202 - 5.5
JIS-C5202 - 7.10
Short Time Overload
Load Life
Apply rated power at 70 C for 1000
0201:± (3%+0.001
Ω
)
hours, 1.5hours "ON" and 0.5hour "OFF"
others:
±
(2%+0.001
Ω
)
Moisture Resistance
Rapid Change of Temperature
Resistance to Soldering Heat
Storage at 40±2
o
C and 90~95% RH
for 1000h
-55
o
C (30 min. ) / +125
o
C (30 min. )
100 cycles
270±5
o
C solder , 10±1 sec dwell
245±5
o
C solder, 2±0.5 sec dwell.
Solder : Sn96.5 / Ag3.0 / Cu0.5
3mm deflection
125
±5
o
C for 1000 hrs
0201:± (3%+0.001
Ω
)
others:
±
(2%+0.001
Ω
)
±
(1%+0.001
Ω
)
JIS-C5202 - 7.9
JIS-C5202 - 7.4
0201:± (2%+0.001
Ω
)
JIS-C5202 - 6.10
others:
±
(1%+0.001
Ω
)
At least 95% of surface
area of electrode shall be
covered with new solder.
Solderability
Robustness of Termination
(Bending Strength)
JIS-C5202 - 6.11
JIS-C5202 - 6.1
JIS-C5202 - 7.2
0201:± (2%+0.001
Ω
)
others:
±
(1%+0.001
Ω
)
±
(1%+0.001
Ω
)
High Temperature Exposure
8. Taping & Reel
8.1 Taping Dimensions: 4 mm pitch paper
CRM06
CRM10
CRM12
Cal-Chip Electronics, INC.
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