Rheostats

A rheostat is a variable resistor which is used to control current within an electrical circuit. They are able to vary the resistance in a circuit without interruption. Rheostats are very similar in construction to potentiometers. You can learn more in our complete guide to rheostats.

How Rheostats Operate
Rheostats use two connections, even when 3 terminals are present, the first connection is made to one end of the resistive element and the other connection to the wiper (sliding contact). Resistive wire is wound around an insulating ceramic core, as the wiper slides over the windings the resistance, and therefore current, produced is altered.
Rheostat Types
Several types of rheostats exist, with varying functions and applications.
• Rotary type – Mostly used in power control applications. Rotary rheostats feature a turnable shaft that adjusts the resistance. They are used to control multiple applications in parallel or to increase the power rating or adjusting range.
• Slide type – Slide rheostats are often used for education and in laboratory environments. Linear or slide types are constructed of resistive wire wound on an insulating cylinder, a sliding contact moves along the winding to increase or decrease the resistance.

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Description Price Maximum Resistance Tolerance Power Rating Number of Turns Mounting Type Shaft Diameter Mounting Hole Diameter Termination Style Dimensions Depth Height Length Maximum Operating Temperature Actuator Type
RS Stock No. 167-9917
Mfr. Part No.RT500AS1001KB
BrandVishay
£825.183
Each (In a Pack of 25)
Units
1kΩ ±10% 500W 1 Panel Mount 10 mm 12mm Solder Lug 143 x 158mm - - 158mm +320°C -
RS Stock No. 788-7677
Mfr. Part No.RT500AS1001KB
BrandVishay
£916.87
Each
Units
1kΩ ±10% 500W 1 Panel Mount 10 mm 12mm Solder Lug 143 x 158mm - - 158mm +320°C -
RS Stock No. 167-9820
Mfr. Part No.RT025AS47R0KB
BrandVishay
£73.151
Each (In a Pack of 25)
Units
47Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 788-7835
Mfr. Part No.RT025AS47R0KB
BrandVishay
£87.67
Each
Units
47Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 788-7823
Mfr. Part No.RT025AS4701KB
BrandVishay
£109.75
Each
Units
4.7kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 168-0124
Mfr. Part No.RT025AS4701KB
BrandVishay
£73.655
Each (In a Pack of 25)
Units
4.7kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 788-7706
Mfr. Part No.RT055AS22R0KB
BrandVishay
£299.36
Each
Units
22Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 x 64mm - - 64mm +320°C -
RS Stock No. 168-0123
Mfr. Part No.RT025AS2200KB
BrandVishay
£79.423
Each (In a Pack of 25)
Units
220Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 788-7817
Mfr. Part No.RT025AS2200KB
BrandVishay
£112.83
Each
Units
220Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 167-9890
Mfr. Part No.RT055AS22R0KB
BrandVishay
£222.583
Each (In a Pack of 25)
Units
22Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 x 64mm - - 64mm +320°C -
RS Stock No. 168-0119
Mfr. Part No.RT025AS10R0KB
BrandVishay
£60.08
Each (In a Pack of 25)
Units
10Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 788-7804
Mfr. Part No.RT025AS10R0KB
BrandVishay
£72.11
Each
Units
10Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 788-7683
Mfr. Part No.RT100AS22R0KB
BrandVishay
£123.04
Each
Units
22Ω ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 x 81mm - - 81mm +320°C -
RS Stock No. 167-9894
Mfr. Part No.RT100AS22R0KB
BrandVishay
£120.984
Each (In a Pack of 25)
Units
22Ω ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 x 81mm - - 81mm +320°C -
RS Stock No. 168-0066
Mfr. Part No.RT012AS1000KB
BrandVishay
£104.102
Each (In a Pack of 25)
Units
100Ω ±10% 12W 1 Panel Mount 3 mm 6.5mm Solder Lug 22.5 x 40mm - - 40mm +320°C -
RS Stock No. 788-7807
Mfr. Part No.RT025AS1500KB
BrandVishay
£106.45
Each
Units
150Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 167-9885
Mfr. Part No.RT055AS3300KB
BrandVishay
£206.804
Each (In a Pack of 25)
Units
330Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 x 64mm - - 64mm +320°C -
RS Stock No. 788-7810
Mfr. Part No.RT025AS1001KB
BrandVishay
£89.43
Each
Units
1kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 788-7693
Mfr. Part No.RT055AS1002KB
BrandVishay
£337.63
Each
Units
10kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 x 64mm - - 64mm +320°C -
RS Stock No. 167-9886
Mfr. Part No.RT055AS1002KB
BrandVishay
£250.238
Each (In a Pack of 25)
Units
10kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 x 64mm - - 64mm +320°C -