Metal Strip Current Sense
Resistors Surface Mount
ULR Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
© TT electronics plc
11.12
· Resistance R0005 (0.5mΩ) to R015 (15mΩ)
· Low TCR, Low inductance
· Designed for current sensing in power
electronic systems
· Solid metal element withstands high current surges
· RoHS compliant
· AEC-Q200 Qualified
ULR1S ULR1 ULR15S ULR2 ULR25 ULR3
Footprint size 1206 2512 2010 2512 2512 2512
Power rating at 80°C watts 1.0 1.0 1.5 2.0 2.5 3.0
Resistance range 1 ohms R001 to R01 R0005
to R015 R001 to R01 R0005
to R01
R004
to R006
R0005
to R003
Isolation voltage volts 200V 200V 200V 200V 200V 200V
TCR ppm/°C 50
50, 75,100,
150
See table
below
50 50 50
50, 100
See table
below
Resistance tolerance % 1(F), 5(J)
Protective coating 2None Black/Green None Black/Green Green Green
Standard values See table below for available values
Ambient temperature range °C -55 to +170
Value ULR1S ULR1 ULR15S ULR2 ULR25 ULR3
Coat TCR Coat TCR Coat TCR Coat TCR Coat TCR Coat TCR
R0005 Black 50 Black 50 Green 100
R00075 Black 50 Black 50 Green 100
R001 None 50 Black 50 None 50 Black 50 Green 50
R0015 Black 50 Black 50 Green 50
R002 None 50 Black 50 None 50 Black 50 Green 50
R0025 Black 150
R003 None 50 Black 150 None 50 Green 50
R004 None 50 Black 100 None 50 Green 50
R0045 Green 50
R005 None 50 Black 100
Black 100
None 50 Green 50
R0065 Black 75 Green 50
R006 None 50 Black 75 None 50 Green 50
R007 None 50 Black 75 None 50 Green 50
R008 None 50 None 50 Green 50
R009 None 50 None 50 Green 50
R01 None 50 None 50 Green 50
R011 Green 50
R012
R013
R014
Green 50
Green 50
Green 50
R015 Green 50
Welwyn Components
Metal Strip Current Sense
Resistors Surface Mount
ULR Series
· Resistance R0005 (0.5m ) to R015 (15m )
· Low TCR, Low inductance
· Designed for current sensing in power electronic systems
· Solid metal element withstands high current surges
· RoHS compliant
· AEC-Q200 Qualified
Electrical Data
Note 1: For values above 0R015 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
ULR1S ULR1 ULR15S ULR2 ULR25 ULR3
Footprint size 1206 2512 2010 2512 2512 2512
Power rating at 80°C watts 1.0 1.0 1.5 2.0 2.5 3.0
Resistance range 1 ohms R001 to R01 R0005
to R015 R001 to R01 R0005
to R01
R004
to R006
R0005
to R003
Isolation voltage volts 200V 200V 200V 200V 200V 200V
TCR ppm/°C 50
50, 75,100,
150
See table
below
50 50 50
50, 100
See table
below
Resistance tolerance % 1(F), 5(J)
Protective coating 2None Black/Green None Black/Green Green Green
Standard values See table below for available values
Ambient temperature range °C -55 to +170
Value ULR1S ULR1 ULR15S ULR2 ULR25 ULR3
Coat TCR Coat TCR Coat TCR Coat TCR Coat TCR Coat TCR
R0005 Black 50 Black 50 Green 100
R00075 Black 50 Black 50 Green 100
R001 None 50 Black 50 None 50 Black 50 Green 50
R0015 Black 50 Black 50 Green 50
R002 None 50 Black 50 None 50 Black 50 Green 50
R0025 Black 150
R003 None 50 Black 150 None 50 Green 50
R004 None 50 Black 100 None 50 Green 50
R0045 Green 50
R005 None 50 Black 100
Black 100
None 50 Green 50
R0065 Black 75 Green 50
R006 None 50 Black 75 None 50 Green 50
R007 None 50 Black 75 None 50 Green 50
R008 None 50 None 50 Green 50
R009 None 50 None 50 Green 50
R01 None 50 None 50 Green 50
R011 Green 50
R012
R013
R014
Green 50
Green 50
Green 50
R015 Green 50
Welwyn Components
Metal Strip Current Sense
Resistors Surface Mount
ULR Series
· Resistance R0005 (0.5m ) to R015 (15m )
· Low TCR, Low inductance
· Designed for current sensing in power electronic systems
· Solid metal element withstands high current surges
· RoHS compliant
· AEC-Q200 Qualified
Electrical Data
Note 1: For values above 0R015 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
Metal Strip Current Sense
Resistors Surface Mount
ULR Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
© TT electronics plc
11.12
Welwyn Components
© 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 08.10
Metal Strip Current Sense Resistors Surface Mount
ULR Series
Construction
Black coat
A low TCR resistance alloy plate, with tin plated connection bands is protectively coated on the upper and lower
faces and numerically marked with the resistance value. This part is suitable for wave or reflow soldering.
Green coat
A low TCR resistance alloy plate is grooved to set the final resistance, the lower faces are tin plated for
connections, and it is protectively coated on the upper and lower faces and numerically marked with the resistance
value. This part is ONLY suitable for reflow soldering.
Uncoated
A low TCR resistance alloy plate is grooved to set the final resistance and the lower face only is protected with an
epoxy coating. The lower faces are tin plated for connections. This part is ONLY suitable for reflow soldering.
Marking
Only 2512 size parts are marked. For values which are integer numbers of milliohms, the marking is 4-character
IEC62 code; e.g. “R002” for 2m , “R010” for 10m . 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 0.75m , “1M50” for 1.5m .
Termination Details:
Material Matt tin plated finish over a barrier layer
Solderability 95% min coverage(MIL-STD 202F/208H, 235ºC 2 secs)
Sn Plated Finish
Green Coat & Uncoated
Black
AEC-Q200 Table 7
Method
Max.
(add R0005)
ref.
Test
Black &
uncoated Green
3 High Temp. Exposure * MIL-STD-202 Method 108 1 1
4 Temperature Cycling JESD22 Method JA-104 0.5 0.5
6 Moisture Resistance MIL-STD-202 Method 106 1 1
7 Biased Humidity MIL-STD-202 Method 103 1 1
8 Operational Life (Cyclic Load) * MIL-STD-202 Method 108 1 1
14 V ibration MIL-STD-202 Method 204 0.5 0.5
15 Resistance to Soldering Heat * MIL-STD-202 Method 210 0.5 1
16 Thermal Shock * MIL-STD-202 Method 107 0.5 1
18 Solderability J-STD-002 >95% coverage
21 B oard Flex AEC-Q200-005 0.5 0.5
22 Terminal Strength AEC-Q200-006 0.25 0.25
Short Term Overload * 5 x Pr for 5s 0.5 1
Notes:
1. Full AEC-Q200 qualification applies to 2512 size. The 1206 and 2010 sizes have received the tests marked *.
Power de-rating graph 100
%
P
50
%
0
%
T°C
80 170
0
-55
Ni Plating
Metal Strip Current Sense
Resistors Surface Mount
ULR Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
© TT electronics plc
11.12
Package Resistance
(mΩ)
a L
1206
1, 4 – 6 1.55 0.55
2 – 3, 10 1.05 1.55
7 – 9 1.35 0.95
2010
1, 4 - 5 2.29 0.95
2, 6 – 8 1.99 1.55
3 1.49 2.55
9 - 10 1.74 2.05
Package Resistance
(mΩ)
a L
2512 – Black All 2.70 2.95
2512 - Green
0.5 3.13 0.52
0.75 2.93 0.94
1 2.38 2.04
1.5 1.88 3.04
2 – 3 1.63 3.54
4 – 4.5 2.63 1.54
5 – 6 2.38 2.04
6.5 – 7 1.88 3.04
8 - 15 1.63 3.54
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com ULR Issue April 2011 Sheet 3 of 6
a
1.0
L
1.2
4-wire pad layout
L3.45
2-wire pad layout
1.5
5.4
4-wire measurement points
mm :tinumm :tinumm :tinu
0.8 L
1.05 L2.9 1.2
4.32
unit: mm unit: mm unit: mm
0.5
0.7
unit: mm unit: mm unit: mm
L1.9 1.25
2.6
0.5
Probe dia.
0.5
Probe dia.
0.5
Probe dia.
215221522152
stniop tnemerusaem eriw-4tuoyal dap eriw-2tuoyal dap eriw-4 010201020102
stniop tnemerusaem eriw-4tuoyal dap eriw-2tuoyal dap eriw-4 602160216021
L
a
aa
aa
Electrical Connections
Note: Nominal values; tolerances not included
Package Resistance
(mΩ)
a L
2010 - Green
11.55 0.55
2 - 3 1.05 1.55
4 - 6 1.55 0.55
7 - 9 1.35 0.95
10 1.05 1.55
1206 - Green
12.29 0.95
2 1.99 1.55
3 1.49 2.55
4 - 5 2.29 0.95
6 - 8 1.99 1.55
9 - 10 1.74 2.05
Package Resistance
(mΩ)
a L
2512 - Black All 2.7 2.9
2512 - Green
0.5 3.13 0.52
0.75 2.93 0.94
12.38 2.04
1.5 1.88 3.04
2 - 3 1.63 3.54
4, 4.5 2.63 1.54
5 - 6 2.38 2.04
6.5, 7 1.88 3.04
8 - 15 1.63 3.54
Metal Strip Current Sense
Resistors Surface Mount
ULR Series
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
© TT electronics plc
11.12
Welwyn Components
© 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 08.10
Metal Strip Current Sense Resistors Surface Mount
ULR Series
Ordering Procedure
Example: ULR1 at 2.5 milliohms and 1% tolerance on reel of 2000 pieces:
U L R 1 – R 0 0 2 5 F T 2
Type
Value (use IEC62 code)
Tolerance (use IEC62 code)
F 1%
J 5%
Packing
Packaging
ULR parts are packed on a 2000 piece reel. Tape width is 8mm for 1206 and 12mm for 2010 and 2512.
Flammability
The resistor will not burn or emit incandescentparticles 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.
Welwyn Components
© 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 08.10
Metal Strip Current Sense Resistors Surface Mount
ULR Series
Ordering Procedure
Example: ULR1 at 2.5 milliohms and 1% tolerance on reel of 2000 pieces:
U L R 1 – R 0 0 2 5 F T 2
Type
Value (use IEC62 code)
Tolerance (use IEC62 code)
F 1%
J 5%
Packing
Packaging
ULR parts are packed on a 2000 piece reel. Tape width is 8mm for 1206 and 12mm for 2010 and 2512.
Flammability
The resistor will not burn or emit incandescentparticles 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.
Welwyn Components
© 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 08.10
Metal Strip Current Sense Resistors Surface Mount
ULR Series
Recommended Solder Pad Layouts
2-wire pad layout.
4-wire pad layout.
Physical Data
W
D
T
L
Package Resistance
(mΩ)
a L
2512 – Black All 2.70 2.95
2512 - Green
0.5 3.13 0.52
0.75 2.93 0.94
1 2.38 2.04
1.5 1.88 3.04
2 – 3 1.63 3.54
4 – 4.5 2.63 1.54
5 – 6 2.38 2.04
6.5 – 7 1.88 3.04
8 - 15 1.63 3.54
B
AC
Package Resistance
(mΩ)
a L
1206
1, 4 – 6 1.55 0.55
2 – 3, 10 1.05 1.55
7 – 9 1.35 0.95
2010
1, 4 - 5 2.29 0.95
2, 6 – 8 1.99 1.55
3 1.49 2.55
9 - 10 1.74 2.05
A
T2 Tape 1206, 2010, 2512 2000 / reel Standard
T1 1000 / reel