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Resistor Specifier
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Technology
Power (watts)
Resistance
Tolerance (%)
TCR (ppm/ºC)
Part Number
Wirewound
0.5 to 4
0.005 ohms to 50 KOhms
0.01
20
S&SL
Current Sensing Chip Resistor
0.06 to 2
0.01 ohms to 1 ohms
1
100
CLS
AEC-Q200 Current Sensing Chip Resistor
0.06 to 2
0.01 ohms to 1 ohms
1
100
CLSA
Metal Strip Chip Resistor
1 to 3
0.0005 ohms to 0.015 ohms
1
50
CSR
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Technology
Power (watts)
Resistance
Tolerance (%)
TCR (ppm/ºC)
Part Number
Foil (CuNiMn)
0 to 40
0.01 ohms to 100 ohms
0.25
15
FHR 2-3025, 3818
Foil (CuNiMn)
350 to 2500
0.001 ohms to 500 ohms
0.1
15
FHR 2/4-8065, 80110, 80216, 80320, 80370
Foil (CuNiMn)
0 to 40
0.001 ohms to 100 ohms
0.1
15
FHR 4-3825, 3825H, 4618
Foil (CuNiMn)
60 to 80
0.001 ohms to 100 ohms
0.1
15
FPR FNR 2-T227, 4-T227
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Technology
Power (watts)
Resistance
Tolerance (%)
TCR (ppm/ºC)
Part Number
Foil (CuNiMn)
1 to 2
0.001 ohms to 100 ohms
0.1
15
FPR 2-1617, 1623, 2614
Foil (CuNiMn)
0 to 30
0.002 ohms to 20 ohms
0.1
15
FPR 2-T218
Chip Shunt Resistor
3 to 5
0.0005 ohms to 0.004 ohms
1
50
MNRS
Metal Element
1 to 5
0.005 ohms to 0.1 ohms
1
20
MS
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Technology
Power (watts)
Resistance
Tolerance (%)
TCR (ppm/ºC)
Part Number
Metal Element
1 to 5
0.005 ohms to 0.1 ohms
1
20
MSR
Metal Element Molded
1 to 10
0.003 ohms to 0.1 ohms
0.1
120
MT
Low TCR Current Sense Resistor
3 to 40
0.005 ohms to 20 ohms
0.5
2
PCS
Thin Film
5 to 20
0.01 ohms to 51 KOhms
1
50
PF1262
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Technology
Power (watts)
Resistance
Tolerance (%)
TCR (ppm/ºC)
Part Number
Power Film
0 to 140
0.02 ohms to 51 KOhms
1
50
PF2470
Current Sensing Shunt
77 to 173
0.1 ohms to 0.5 ohms
1
100
RCS
Base Mounted Shunt
0.25 to 120
0.0000417 ohms to 0.02 ohms
0.25
15
RS
DC Ammeter Shunts / Busbar Shunts
15 to 600
0.83 ohms to 3.333 ohms
0.25
0
RSH
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Technology
Power (watts)
Resistance
Tolerance (%)
TCR (ppm/ºC)
Part Number
DC Ammeter Shunts / Busbar Shunts
300 to 1200
0.042 ohms to 0.333 ohms
0.25
0
RSI
DC Ammeter Shunts / Busbar Shunts
1500 to 2000
0.025 ohms to 0.067 ohms
0.25
0
RSJ
DC Ammeter Shunts / Busbar Shunts
2500 to 10000
0.005 ohms to 0.04 ohms
0.25
0
RSL
Precision Base Mounted Shunt
1 to 500
0.667 ohms to 333.33 ohms
0.1
0
RSN
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Technology
Power (watts)
Resistance
Tolerance (%)
TCR (ppm/ºC)
Part Number
Wirewound
1 to 2
0.01 ohms to 1 KOhms
0.005
20
SC
Foil (NiCr)
30 to 50
0.05 ohms to 650 ohms
0.01
1
USR UNR 4-3425, 4020
Featured Products
Riedon Ammeter Shunt Resistors In The News
The shunt resister, also known as the current sense resistor, is designed with the specific purpose of measuring either direct or alternating current. The shunt resistor is designed to accomplish this by that actual drop in voltage across the surface of the resistor. Most people are familiar with a common device used to measure an electrical current. This device is called an “ammeter” and the measured outcome is figured by using something knows as “Ohm’s Law”. Ohms Law is a mathematical equation used to determine the actual current flow within the resistor.
When the current is too high within the resistor for the ammeter to safely measure it, a shunt resistor is placed within the circuit design. The shunt resistor, when properly placed, divides the current so that only a portion of it flows through the ammeter upon measurement. In this way, high voltage currents can be accurately and safely measured since only a predetermined percentage is needed to calculate the total voltage current running through the circuit.
The scaling is also important in order to ensure that the amount measured does not exceed the specified voltage rating of the device. Riedon manufactures precision shunt resistors with low values of resistance. A well-designed shunt resistor by Riedon will have the lowest possible resistance value. This is done in order to ensure as little interference as possible with the functioning circuit. Being able to accurately sense the voltage drop across the resistor is the main function of the precision shunt resistors.
Optimal placement of the precision shunt resistor within each device is crucial to the proper performance of the device. The experts with Riedon know how to provide the customized design solutions you need for high voltage precision circuits. Proper calculation depends on precise design and placement of the shunt resistor. Riedon understands how to effectively optimize all specific, identifying parameters within the shunt resistors. These include the maximum current rating, the power rating, the resistance tolerance and the temperature coefficient of resistance.
Each defining parameter within the shunt resistor is designed for a specific purpose. For example the power range refers to the amount of power that the shunt resistor is able to dissipate within a specified temperature range, without damaging the integrity of the shunt or the device. Riedon understands that high quality, well-tested, precise shunt resistors matter when it comes to product reliability and longevity. The Riedon engineering experts are working day and night to bring the you very best in resistive technology solutions. Contact a Riedon team member today for more information about the customized options available to you, delivered on time with the best guaranteed.