Metal Strip Current Sense Resistors
Surface Mount
ULR Series
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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
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Electrical Data
ULR1
Power rating at 80°C
Resistance range
1
Isolation voltage
TCR
Resistance Tolerance
Protective coating
Standard Values
Ambient temperature range
2
ULR2
2.0
R0005 to R01
200V
50
1(F), 5(J)
ULR25
2.5
R0035 to R006
200V
50
ULR3
3.0
R0005 to
R003
200V
50, 75, 100
See table
below
Green
watts
ohms
volts
ppm/°C
%
1.0
R0005 to R007
200V
50, 75, 100, 150
See table below
Black
°C
Green/ Black
Green
See table below for available values
-55 to +170
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
Value
R0005
R00075
R001
R0015
R002
R0025
R003
R0035
R004
R0045
R005
R0055
R006
R007
R008
R009
R01
Colour
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
Black
TCR
50
50
50
50
50
150
150
150
100
100
100
100
75
75
ULR2
Colour
Black
Black
Black
Black
Black
TCR
50
50
50
50
50
ULR25
Colour
TCR
ULR3
Colour
Green
Green
Green
Green
Green
Green
Green
TCR
100
100
50
50
50
75
75
Green
Green
Green
Green
Green
Green
Green
Green
Green
Green
50
50
50
50
50
50
50
50
50
50
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 test data and is considered accurate at time of print.
©Welwyn
Components Limited
A subsidiary of TT electronics plc
Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web:
WELWYN [ WELWYN COMPONENTS LIMITED ]
