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Here at Rhopoint Components we can offer a vast selection of power resistors for various applications by a range of industry leading manufacturers including Alpha Electronics, Caddock, Isabellenhuette, RARA, Riedon and Susumu. Variety of package sizes both surface-mount and through-hole, resistance values, tolerances and other variables, as well as fully customisable options are available, with the most common options held in the UK stock for quick delivery.
Can't find what you're looking for? Contact us, we can often offer customised solution to meet all your needs.
The FNP high power precision shunt resistor series from Alpha Electronics offers a range of very high precision current sensing shunts with a maximum power rating of 500W on a suitable heat sink at +25°C. By utilising a Ni-Cr Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients. The FNP shunt resistor series has a built in Pt100 sensor for monitoring the temperature of the resistive element.
The Alpha Electronics FNP precision shunt resistor series are constructed out of the following materials:
Alpha's Ni-Cr Bulk Metal® foil resistor technology means these high power precision shunt resistors resistors are ideal in applications like:
The below table gives a summary of the specifications and options available for the Alpha FNP series:
* Keep temperature of the resistive element surface less than +125°C
** Please contact us for higher resistance values
£0.00 Ex Tax: £0.00
The PSB ultra-precision power shunt resistor series from Alpha Electronics offers 4-terminal (Kelvin) connections for current sensing and a power rating of up to 40W on a heat sink or 12W in free air (at +25°C) all with a low ohmic resistance range from 0.001Ω to 1Ω. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to offer excellent temperature characteristics with low temperature coefficients down to ±5 ppm/°C between the resistance range 0.005Ω and 1Ω.
The PSB ultra-precision shunt resistor series exhibits excellent temperature characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision and high power applications.
The 4-terminal connections of this high power shunt series offers accurate current sensing capabilities even in low extremity of resistance.
The PSB series has been designed for easy mounting to heat sink or water-cooled radiator as well as with threaded holes to fix cables with screws (Caution: please screw current terminals >5N·m and voltage terminals >1N·m)
Their 4-terminal design and high precision make them ideal for current sensing in precise power supply or motor driver applications.
The below table gives a summary of the specifications and options available for the Alpha PSB series:
* Thermal resistance of the heat sink 1°C/W
Available to use higher rated power with elevation of cooling effect
Please keep temperature of element surface less than +60°C
£0.00 Ex Tax: £0.00
The BAC precision resistor series from Isabellenhütte includes a PCB with connector for voltage sensing, designed for battery management systems or welding equipment with a low resistance value of 50µΩ or 100µΩ. The BAC series from Isabellenhütte is available with untinned or Ni-plated terminals, continuous load up to 550A (50µΩ) within a chip size of 8420.
Typical applications for the BAC series include:
The below table gives an overview of the specifications for the Isabellenhütte BAC series:
£0.00 Ex Tax: £0.00
The BKW 4-terminal precision resistor series from Isabellenhütte, designed for energy meters with resistance values from 0.0003Ω to 0.0005Ω. The BKW series from Isabellenhütte has extremely good long-term stability, thus the energy meters do not require any recalibration, very high reproducibility of R-value and TCR.
Typical applications for the BKW series include:
The below table gives an overview of the specifications for the Isabellenhütte BKW series:
£0.00 Ex Tax: £0.00
The FRH 25C metal clad thick film resistor series from RARA offers a power rating of up to 15W on a heat sink and 5W in free air with available resistance values between 1kΩ and 2MΩ (non-inductive design). These high power resistors are available with tolerances of ±1%, ±2%, ±5% and ±10.0%. The FRH 25C series from RARA has a cement moulding within an aluminium housing, which mounts on to a chassis to utilise the heat sink effect, all with a temperature range from -15°C up to +105°C.
The below table gives the specifications available for the FRH series including the FRH 25C resistors:
*30W on heat sink (178x127x51x1mm), 50W on heat sink (305x305x2mm)
*Option of ±20 ppm/°C is available upon request, please contact us for further details
£0.00 Ex Tax: £0.00
The FRH 50C metal clad thick film resistor series from RARA offers a power rating of up to 25W on a heat sink and 8W in free air with available resistance values between 1kΩ and 2MΩ (non-inductive design). These high power resistors are available with tolerances of ±1%, ±2%, ±5% and ±10.0%. The FRH 50C series from RARA has a cement moulding within an aluminium housing which mounts on to a chassis to utilise the heat sink effect, all with a temperature range from -15°C up to +105°C
The below table gives the specifications available for the FRH series including the FRH 50C resistors:
*30W on heat sink (178x127x51x1mm), 50W on heat sink (305x305x2mm)
*Option of ±20 ppm/°C is available upon request, please contact us for further details
£0.00 Ex Tax: £0.00
The IRB120 metal clad wire wound economy resistor series from RARA offers a power rating of up to 120W with available resistance values between 0.1Ω and 1.3kΩ (inductive design) or between 0.1Ω and 300Ω (non-inductive design). These high power resistors are available with tolerances of ±2.0%, ±3.0%, ±5.0% and ±10.0% other options available including inductive or non-inductive resistive windings. The IRB120 series from RARA come in a durable metal case with flying leads and offers a temperature range from -55°C up to +200°C
The below table gives the specifications available for the IRB series including the IRB120 resistors:
£0.00 Ex Tax: £0.00
The IRB60 metal clad wire wound economy resistor series from RARA offers a power rating of up to 60W with available resistance values between 0.1Ω and 270Ω (inductive design) or between 0.1Ω and 56Ω (non-inductive design). These high power resistors are available with tolerances of ±2.0%, ±3.0%, ±5.0% and ±10.0% other options available including inductive or non-inductive resistive windings. The IRB60 series from RARA come in a durable metal case with flying leads and offers a temperature range from -55°C up to +200°C
The below table gives the specifications available for the IRB series including the IRB60 resistors:
£0.00 Ex Tax: £0.00
The IRB80 metal clad wire wound economy resistor series from RARA offers a power rating of up to 80W with available resistance values between 0.1Ω and 910Ω (inductive design) or between 0.1Ω and 110Ω (non-inductive design). These high power resistors are available with tolerances of ±2.0%, ±3.0%, ±5.0% and ±10.0% other options available including inductive or non-inductive resistive windings. The IRB80 series from RARA come in a durable metal case with flying leads and offers a temperature range from -55°C up to +200°C
The below table gives the specifications available for the IRB series including the IRB80 resistors:
£0.00 Ex Tax: £0.00
The IRF100 flat type metal clad wire wound resistor series from RARA, offers a power rating of up to 100W on a heat sink and available resistance values between 1Ω and 1.1kΩ. These high power and low inductance resistors are designed for industrial and other applications where space is at a premium, the flat design also allows for excellent heat dissipation. The IRF100 series from RARA offers an extruded aluminium housing which provides strong and rugged protection, with options of cement or silicone filling materials as well as tolerances as low as ±0.5%. This resistor series offers a temperature range from -55°C up to +200°C (cement filling material).
Typical applications for the IRF series include:
The below table gives the specifications available for the IRF series including the IRF100 resistors:
£0.00 Ex Tax: £0.00
The IRF150 flat type metal clad wire wound resistor series from RARA, offers a power rating of up to 150W on a heat sink and available resistance values between 1Ω and 1.75kΩ. These high power and low inductance resistors are designed for industrial and other applications where space is at a premium, the flat design also allows for excellent heat dissipation. The IRF150 series from RARA offers an extruded aluminium housing which provides strong and rugged protection, with options of cement or silicone filling materials as well as tolerances as low as ±0.5%. This resistor series offers a temperature range from -55°C up to +200°C (cement filling material).
Typical applications for the IRF series include:
The below table gives the specifications available for the IRF series including the IRF150 resistors:
£0.00 Ex Tax: £0.00
The IRF200 flat type metal clad wire wound resistor series from RARA, offers a power rating of up to 200W on a heat sink and available resistance values between 1Ω and 2.2kΩ. These high power and low inductance resistors are designed for industrial and other applications where space is at a premium, the flat design also allows for excellent heat dissipation. The IRF200 series from RARA offers an extruded aluminium housing which provides strong and rugged protection, with options of cement or silicone filling materials as well as tolerances as low as ±0.5%. This resistor series offers a temperature range from -55°C up to +200°C (cement filling material).
Typical applications for the IRF series include:
The below table gives the specifications available for the IRF series including the IRF200 resistors:
£0.00 Ex Tax: £0.00
The IRF250 flat type metal clad wire wound resistor series from RARA, offers a power rating of up to 250W on a heat sink and available resistance values between 1Ω and 2.79kΩ. These high power and low inductance resistors are designed for industrial and other applications where space is at a premium, the flat design also allows for excellent heat dissipation. The IRF250 series from RARA offers an extruded aluminium housing which provides strong and rugged protection, with options of cement or silicone filling materials as well as tolerances as low as ±0.5%. This resistor series offers a temperature range from -55°C up to +200°C (cement filling material).
Typical applications for the IRF series include:
The below table gives the specifications available for the IRF series including the IRF250 resistors:
£0.00 Ex Tax: £0.00
The IRF300 flat type metal clad wire wound resistor series from RARA, offers a power rating of up to 300W on a heat sink and available resistance values between 1Ω and 3.5kΩ. These high power and low inductance resistors are designed for industrial and other applications where space is at a premium, the flat design also allows for excellent heat dissipation. The IRF300 series from RARA offers an extruded aluminium housing which provides strong and rugged protection, with options of cement or silicone filling materials as well as tolerances as low as ±0.5%. This resistor series offers a temperature range from -55°C up to +200°C (cement filling material).
Typical applications for the IRF series include:
The below table gives the specifications available for the IRF series including the IRF300 resistors:
£0.00 Ex Tax: £0.00
The IRF400 flat type metal clad wire wound resistor series from RARA, offers a power rating of up to 400W on a heat sink and available resistance values between 1Ω and 4.45kΩ. These high power and low inductance resistors are designed for industrial and other applications where space is at a premium, the flat design also allows for excellent heat dissipation. The IRF400 series from RARA offers an extruded aluminium housing which provides strong and rugged protection, with options of cement or silicone filling materials as well as tolerances as low as ±0.5%. This resistor series offers a temperature range from -55°C up to +200°C (cement filling material).
Typical applications for the IRF series include:
The below table gives the specifications available for the IRF series including the IRF400 resistors:
£0.00 Ex Tax: £0.00
