Current Sensing Resistor
Metal Strip Type >SMR Series
File No: JS-CSR-SMR-00
Revision:E
Page: 1 of 6
General
• Chip size from 1206 to 2512
• Resistance value from 1m to 50m
• Low thermal EMF
• Low inductance 0.5nH to 5nH
• Low TCR
• Lead free, RoHS compliant for global
• Applications and halogen free
Application
• Switching model power supply
• Battery pack
• Notebook, personal computer
• Test Instrument
• Power Amplifier
Electrical Specifications
Type
Power Rating
at 70℃(W)
Resistance
Range
(mΩ)
TCR
(ppm/℃)
2512
2
1~50
±50
2512
3
1~10
±65
1206
1
3~30
±50
Part Number information
SMR
25
M
2
F
R010
T
【1】 【2】【3】 【4】【5】 【6】 【7】
【1】Series Name: SART Metal Current Sensing Chip Resistors
【2】Chip size: 12:1206 25:2512
【3】Material Code: M:MnCu N:NiCu S:CuMnSn
【4】Power Code: 1:1W 2:2W 3:3W
【5】Resistance Tolerance: F:±1% D:±0.5% J:±5%
【6】Resistance Code: R002=2mΩ、R010=10mΩ、2L50=2.5mΩ
【7】Packaging Code: T: Tape & Reel、B:Bulk Pack
Nanjing SART Science& Technology Development Co., Ltd.
ADD.: Maqun Science & Technology Park, Qingma Road 6#, Nanjing, China
TEL.: 086-25-84354852
FAX.:086-25-83241791 Web.: www.sartfuse.com
Resistance
tolerance
±0.5%(D)
±1%(F)
±5%(J)
±0.5%(D)
±1%(F)
±5%(J)
±0.5%(D)
±1%(F)
Operation
Temp. Range
-55℃~+170℃
-55℃~+170℃
-55℃~+170℃
Current Sensing Resistor
Metal Strip Type >SMR Series
File No: JS-CSR-SMR-00
Revision:E
Page: 2 of 6
Dimensions
Type
Resistance
(mΩ)
L
(mm)
W
(mm)
T
(mm)
6.40±0.20
3.20±0.20
0.60±0.20
1~2
2512
E
(mm)
2.00±0.20
3~50
0.90±0.20
Type
Resistance
(mΩ)
L
(mm)
W
(mm)
T
(mm)
E
(mm)
1206
3~30
3.20±0.20
1.60±0.20
0.60±0.20
0.5±0.30
Recommended Land Patterns
Type
Resistance
Range
(mΩ)
a
(mm)
b
(mm)
L
(mm)
1~2
4.00
3.10
1.80
3~50
4.00
2.10
4.10
3~30
1.80
1.70
1.60
2512
1206
Nanjing SART Science& Technology Development Co., Ltd.
ADD.: Maqun Science & Technology Park, Qingma Road 6#, Nanjing, China
TEL.: 086-25-84354852
FAX.:086-25-83241791 Web.: www.sartfuse.com
Current Sensing Resistor
Metal Strip Type >SMR Series
File No: JS-CSR-SMR-00
Revision:E
Page: 3 of 6
Materials
No.
Materials
1
Metal Alloy
2
Epoxy
3
Epoxy
4
Cu
5
Ni
6
Sn
Power Derating Curve
Recommended Solder Curve
1. Infrared Reflow
• Temperature: 260℃.
• Time: 10 sec Max.
• Recommend Reflow profile:
Profile Feature
Pb-Free Assembly
Average Ramp-up Rate
(Tsmax to Tp)
3℃/sec Max.
Preheat
Temperature Min.(Tsmin)
Temperature Max.(Tsmax)
Time(ts)(Tsmin to Tsmax)
150℃
200℃
60sec~120sec
Peak Temperature(Tp)
260℃
Time(tp) within 5℃ of actual
Peak Temperature(Tp)
10sec Max
Liquidous temperature (TL)
217℃
Time at liquidous (tL)
60sec~150sec
Ramp-down Rate
6℃/sec Max.
Time 25℃ to peak Temperature
8 min Max.
Nanjing SART Science& Technology Development Co., Ltd.
ADD.: Maqun Science & Technology Park, Qingma Road 6#, Nanjing, China
TEL.: 086-25-84354852
FAX.:086-25-83241791 Web.: www.sartfuse.com
Current Sensing Resistor
Metal Strip Type >SMR Series
File No: JS-CSR-SMR-00
Revision:E
Page: 4 of 6
3. Hand Soldering
• Temperature: 350℃
• Time: 3sec Max.
2. Wave soldering
• Reservoir Temperature: 260℃
• Time in Reservoir: 10sec Max.
Product Characteristics
Item
Resistance
Test condition/ Methods
Performance
Measuring resistance value at room temperature
Refer to SART Spec
25℃ ±5℃
Standard
IEC60115-1 4.5
Temperature
coefficient of
resistance
TCR =(R-R0)/R0(T2-T1)X 10-6
T1
T2
Test temperature:+25℃~+125℃
Refer to SART Spec
MIL-STD-202
Method 304
Short time Overload
5 times the rated power for 5 sec
|△R|≤0.5%R
IEC 60115-1 4.13
Resistance to
Soldering Heat
260℃± 5℃,time:10 sec±1 sec
|△R|≤0.5%R
MIL-STD-202
Method 210
Thermal shock
-55℃(15min)/+125℃(15min), 300 cycles
|△R|≤0.5%R
MIL-STD-202
Method107G
Low temperature
storage
-55℃ for 45 min, No power
|△R|≤0.5%R
IEC60115-1
4.23.4
High Temperature
storage
125℃ for 1000 hours, No power
|△R|≤1.0%R
MIL-STD-202
Method 108
Temperature Humidity
Bias Test
+85℃,85% RH,10%bias, 1000hours
|△R|≤0.5%R
Mechanical shock
100 g’s ,6 m sec, 5pulses
|△R|≤0.5%R
Vibration
The frequency varies from 10Hz to 2000Hz, 1
min, 3 directions, and 12 hours
|△R|≤0.5%R
Load life
70℃± 2℃, 1000 hours, at rated power 1.5 hours
“ON”, 0.5 hours “OFF”
|△R|≤1.0%R
MIL-STD-202
Method 108
Solderability
Dip the terminal in a flux and then dip into a
soldering bath at 245℃±5℃ for 2sec~3sec
Min 95% coverage
J-STD-002B Test
B
Board Flex
Min 2 mm delection,60sec
|△R|≤0.5%R
AEC-Q200-005
ESD test
Other: 2KV, 2 times /1sec
|△R|≤1.0%R
AEC-Q200-002
Nanjing SART Science& Technology Development Co., Ltd.
ADD.: Maqun Science & Technology Park, Qingma Road 6#, Nanjing, China
TEL.: 086-25-84354852
FAX.:086-25-83241791 Web.: www.sartfuse.com
MIL-STD-202
Method103
MIL-STD-202
Method 213
MIL-STD-202
Method 204
File No: JS-CSR-SMR-00
Revision:E
Page: 5 of 6
Current Sensing Resistor
Metal Strip Type >SMR Series
Packaging
1. Embossed Tape Dimensions
Type
A
(mm)
B
(mm)
W
(mm)
F
(mm)
E
(mm)
2512
3.60 ±0.20
0.18
6.90±0.20
12.00±0.20
5.50±0.05
1.75±0.10
Type
P1
(mm)
P2
(mm)
P0
(mm)
D0
(mm)
T
(mm)
2512
4.00±0.10
2.00±0.05
4.00±0.05
Type
A
(mm)
B
(mm)
W
(mm)
F
(mm)
E
(mm)
1206
2.00 ± 0.15
3.60±0.20
8.00±0.20
3.50±0.05
1.75±0.10
Type
P1
(mm)
P2
(mm)
P0
(mm)
D0
(mm)
T
(mm)
1206
4.00±0.10
2.00±0.05
4.00±0.10
2. Reel Dimensions
Nanjing SART Science& Technology Development Co., Ltd.
ADD.: Maqun Science & Technology Park, Qingma Road 6#, Nanjing, China
TEL.: 086-25-84354852
FAX.:086-25-83241791 Web.: www.sartfuse.com
1.00±0.15
0.84±0.10
File No: JS-CSR-SMR-00
Revision:E
Page: 6 of 6
Current Sensing Resistor
Metal Strip Type >SMR Series
Type
φA
(mm)
φB
(mm)
φC
(mm)
F
(mm)
W
(mm)
2512
178.00±2.00
60.00±1.00
13.50±0.50
15.40±1.00
13.00±0.30
1206
178.00±2.00
60.00±1.00
13.50±0.50
11.40±0.10
9.00±0.30
3. Quantity of Package
Type
Quantity(pcs)
2512
4000
1206
5000
4. Peeling Test
Storage
• The ambient temperature shall between 5℃~35℃.
• The relative humidity recommended for storage is between 25%RH~75%RH.
• Sealed plastic bags with desiccant shall be used to reduce the oxidation of the termination and shall only be
opened prior to use.
• The products shall not be stored in areas where harmful gases containing sulfur or chlorine are present.
Nanjing SART Science& Technology Development Co., Ltd.
ADD.: Maqun Science & Technology Park, Qingma Road 6#, Nanjing, China
TEL.: 086-25-84354852
FAX.:086-25-83241791 Web.: www.sartfuse.com
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