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.
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. 788-7801
Mfr. Part No.RT025AS15R0KB
BrandVishay
MYR649.15
Each
units
15Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 168-0118
Mfr. Part No.RT025AS15R0KB
BrandVishay
MYR544.246
Each (In a Pack of 25)
units
15Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 788-7823
Mfr. Part No.RT025AS4701KB
BrandVishay
MYR576.95
Each
units
4.7kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 168-0124
Mfr. Part No.RT025AS4701KB
BrandVishay
MYR343.52
Each (In a Pack of 25)
units
4.7kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 788-7700
Mfr. Part No.RT055AS2201KB
BrandVishay
MYR1,190.68
Each
units
2.2kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 167-9820
Mfr. Part No.RT025AS47R0KB
BrandVishay
MYR305.24
Each (In a Pack of 25)
units
47Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 167-9894
Mfr. Part No.RT100AS22R0KB
BrandVishay
MYR1,198.464
Each (In a Pack of 25)
units
22Ω ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 (Dia.) x 81mm - - 81mm +320°C -
RS Stock No. 788-7835
Mfr. Part No.RT025AS47R0KB
BrandVishay
MYR460.88
Each
units
47Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 167-9884
Mfr. Part No.RT055AS2201KB
BrandVishay
MYR1,153.257
Each (In a Pack of 25)
units
2.2kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 788-7683
Mfr. Part No.RT100AS22R0KB
BrandVishay
MYR1,745.57
Each
units
22Ω ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 (Dia.) x 81mm - - 81mm +320°C -
RS Stock No. 788-7826
Mfr. Part No.RT025AS22R0KB
BrandVishay
MYR404.42
Each
units
22Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 168-0120
Mfr. Part No.RT025AS1500KB
BrandVishay
MYR368.21
Each (In a Pack of 25)
units
150Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 168-0128
Mfr. Part No.RT025AS4R70KB
BrandVishay
MYR472.27
Each (In a Pack of 25)
units
4.7Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 167-9891
Mfr. Part No.RT055AS10R0KB
BrandVishay
MYR1,377.348
Each (In a Pack of 25)
units
10Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 788-7677
Mfr. Part No.RT500AS1001KB
BrandVishay
MYR6,628.20
Each
units
1kΩ ±10% 500W 1 Panel Mount 10 mm 12mm Solder Lug 143 (Dia.) x 158mm - - 158mm +320°C -
RS Stock No. 788-7703
Mfr. Part No.RT055AS10R0KB
BrandVishay
MYR1,725.87
Each
units
10Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 168-0125
Mfr. Part No.RT025AS22R0KB
BrandVishay
MYR350.99
Each (In a Pack of 25)
units
22Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 788-7807
Mfr. Part No.RT025AS1500KB
BrandVishay
MYR424.30
Each
units
150Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 788-7839
Mfr. Part No.RT025AS4R70KB
BrandVishay
MYR638.39
Each
units
4.7Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 167-9917
Mfr. Part No.RT500AS1001KB
BrandVishay
MYR5,203.905
Each (In a Pack of 25)
units
1kΩ ±10% 500W 1 Panel Mount 10 mm 12mm Solder Lug 143 (Dia.) x 158mm - - 158mm +320°C -