ULR3 [TTELEC]
Metal Strip Current Sense Resistors Surface Mount; 金属带电流传感电阻器表面贴装
| 型号： | ULR3 |
| 厂家： | 
TT Electronics |
| 描述： | Metal Strip Current Sense Resistors Surface Mount |
| 文件： | 总3页 (文件大小：425K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Metal Strip Current Sense
Resistors Surface Mount
Weellwwyynn CCoommppoonneennttss
ULR Series
• 1 watt to 3 watts, all 2512 size
• Resistance R0005 (0.5mΩ) to R01 (10mΩ)
• Low TCR, Low inductance
• Designed for current sensing in
power electronic systems
• RoHS compliant
Electrical Data
ULR1
1.0
ULR2
ULR25
2.5
ULR3
3.0
Power rating at 80°C
watts
ohms
volts
2.0
R0005 to R01
200V
1
Resistance range
R0005 to R007
200V
R0035 to R006
200V
R0005 to R003
200V
Isolation voltage
50, 75, 100, 150
See table below
50, 75, 100
See table below
TCR
ppm/°C
%
50
50
Resistance Tolerance
1(F), 5(J)
2
Protective coating
Black
Green/ Black
Green
Green
Standard Values
See table below for available values
-55 to +170
Ambient temperature range
°C
Note 1: For values above 0R01 refer to our LR / LRF Series
Note 2: Colour of coating relates to solder process suitability, see Construction
Standard Values Available (non-standard values may be available to order - consult factory)
ULR1
ULR2
ULR25
ULR3
Value
R0005
R00075
R001
Colour
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
TCR
50
Colour
Black
Black
Black
Black
Black
TCR
50
50
50
50
50
Colour
TCR
Colour
Green
Green
Green
Green
Green
Green
Green
TCR
100
100
50
50
50
R0015
R002
50
50
50
50
R0025
R003
150
150
150
100
100
100
100
75
75
75
R0035
R004
Green
Green
Green
Green
Green
Green
50
50
50
50
50
50
R0045
R005
R0055
R006
R007
75
Green
Green
Green
Green
50
50
50
50
R008
R009
R01
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
A subsidiary of
TT electronics plc
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue A · 09.06
Metal Strip Current Sense
Resistors Surface Mount
ULR Series
Weellwwyynn CCoommppoonneennttss
Construction
Black type
Sn Plated Finish
Cn Plating
A low TCR resistance alloy plate, with plated connection bands is
protectively coated and numerically marked with the resistance value.
This part has standard plated end connections and is suitable for wave
or IR reflow soldering.
Ally Plate
Protective Coating
Green type
Black Type
A low TCR resistance alloy plate is grooved to set the final resistance,
the lower faces are solder plated for connections, and it is protectively
coated and numerically marked with the resistance value. This part is
ONLY suitable for IR reflow soldering.
Protective Coating
Metal Strip
Marking
For values which are integer numbers of milliohms, the marking is
4-character IEC62 code; e.g. “R002” for 2mΩ, “R010” for 10mΩ.
For values including fractions of a milliohm the marking is 3 or 4-
character code using “M” to indicate the decimal point, e.g. “M75”
for 0.75mΩ, “1M50” for 1.5mΩ.
Sn Plated Finish
Green Type
Termination Details:
Material
Matt tin plated finish over a barrier layer
Solderability 95% min coverage (MIL-STD 202F / 208H, 235ºC 2 secs)
Performance Data
Maximum
Load at rated power (1000hrs cyclic load at 70°C)
De-rating from rated power at 80°C
∆R%
1% + 0.5mΩ (Black): 1% (Green)
See Graph
Short term overload (5 x rated power for 5s)
Dry heat (96Hrs, no load, +155°C)
∆R%
∆R%
∆R%
∆R%
0.5% + 0.5mΩ (Black): 1% (Green)
1% + 0.5mΩ (Black): 1% (Green)
0.5% + 0.5mΩ (Black): 1% (Green)
0.5% + 0.5mΩ (Black): 1% (Green)
Temperature rapid change (-55 / +150ºC, 100 cycles)
Resistance to solder heat (260ºC for 10s)
Power de-rating graph
P
100%
50%
T°C
0%
-55
0
80
170
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue A · 09.06
Metal Strip Current Sense
Resistors Surface Mount
ULR Series
Weellwwyynn CCoommppoonneennttss
Recommended Solder Pad Layout
1.8
4.75
1.8
4.75
1.45
3.6
0.7
4-wire pad layout (recommended for precision current sensing)
2-wire pad layout
Dimensions (mm)
Type
Green
Green
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Values (mΩ)
0.5mΩ, 0.75mΩ
1mΩ to 10mΩ
0.5mΩ
L
W
T
D
Nom. Wt. (g)
0.09
6.35
6.35
6.35
6.35
6.35
6.35
6.35
6.35
6.35
6.35
6.35
6.35
6.35
6.35
6.35
6.35
3.18
3.18
3.18
3.18
3.18
3.18
3.18
3.18
3.18
3.18
3.18
3.18
3.18
3.18
3.18
3.18
1.00
0.60
1.40
1.00
0.80
0.65
0.50
1.00
0.70
0.71
0.60
0.58
0.50
0.47
0.50
0.45
1.93
1.93
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
1.30
0.08
0.06
D
0.75mΩ
1mΩ
0.06
0.06
1.5mΩ
0.06
W
2mΩ
0.06
2.5mΩ
0.06
3mΩ
0.06
3.5mΩ
0.06
L
4mΩ
0.06
T
4.5mΩ
0.06
5mΩ
0.06
5.5mΩ
0.06
6mΩ
0.06
7mΩ
0.06
Flammability
The resistor will not burn or emit incandescent particles under any condition of applied temperature or overload.
Solvent resistance
The body protection and marking are resistant to all normal industrial solvents suitable for printed circuits.
Packaging
The standard packing for ULR parts is on a 2000 piece reel of size 12mm tape
Ordering Procedure
Example: ULR2 at 2.5 milliohms and 1% tolerance on reel of 2000 pieces:
Type
ULR2 - R0025
F
T2
Resistance value (IEC62 code)
Tolerance (IEC62 code)
Packing
F
J
1%
5%
T2
Tape
2512
2000 / reel
© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Issue A · 09.06
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