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.

...
Read more Read less

Filters

Viewing 1 - 20 of 238 products
Results per page
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
MYR681.60
Each
units
15Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 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 x 50mm - - 50mm +320°C -
RS Stock No. 788-7823
Mfr. Part No.RT025AS4701KB
BrandVishay
MYR615.18
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
MYR434.038
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. 827-6397
Mfr. Part No.VRH320 33R K
BrandArcol
MYR934.09
Each
units
33Ω ±10% - - Freestanding - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS Stock No. 891-5474
Mfr. Part No.RJS225E
BrandOhmite
MYR346.57
Each
units
225Ω ±10% 50W 1 Panel Mount 6.35 mm - Solder Lug 58.67 x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 891-5326
Mfr. Part No.RES1K0E
MYR259.20
Each
units
1kΩ ±10% 12.5W 1 Panel Mount 3.18 mm - Solder Lug 22.23 x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 827-6413
Mfr. Part No.VRH320 100R K
BrandArcol
MYR792.75
Each
units
100Ω ±10% - - Freestanding - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS Stock No. 144-5527
Mfr. Part No.RHS1K5E
MYR300.85
Each
units
1.5kΩ 10% 25W 1 Panel Mount 6.35 mm - Solder 39.62 x 34.93mm 39.62mm - 34.93mm - Linear Shaft
RS Stock No. 893-5272
Mfr. Part No.RRS3R0
BrandOhmite
MYR2,170.816
Each (In a Pack of 5)
units
±10% 500W 1 Panel Mount 9.53 mm - Solder Lug 203.2 x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 891-5632
Mfr. Part No.RNS50RE
BrandOhmite
MYR1,197.87
Each
units
50Ω ±10% 300W 1 Panel Mount 9.53 mm - Solder Lug 152.4 x 60.33mm - - 60.33mm - Linear Shaft
RS Stock No. 892-8085
Mfr. Part No.RUS100E
BrandOhmite
MYR5,356.64
Each
units
100Ω ±10% 1kW 1 Panel Mount 9.53 mm - Solder Lug 304.8 x 76.2mm - - 76.2mm - Linear Shaft
RS Stock No. 167-9820
Mfr. Part No.RT025AS47R0KB
BrandVishay
MYR347.67
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. 144-5530
Mfr. Part No.RHS5K0E
MYR198.50
Each
units
5kΩ 10% 25W 1 Panel Mount 6.35 mm - Solder 39.62 x 34.93mm 39.62mm - 34.93mm - Linear Shaft
RS Stock No. 167-9894
Mfr. Part No.RT100AS22R0KB
BrandVishay
MYR1,241.662
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. 788-7683
Mfr. Part No.RT100AS22R0KB
BrandVishay
MYR1,808.49
Each
units
22Ω ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 x 81mm - - 81mm +320°C -
RS Stock No. 891-5430
Mfr. Part No.RHS5K0E
MYR300.85
Each
units
5kΩ ±10% 25W 1 Panel Mount 6.35 mm - Solder Lug 39.62 x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 167-9884
Mfr. Part No.RT055AS2201KB
BrandVishay
MYR1,198.522
Each (In a Pack of 25)
units
2.2kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 x 64mm - - 64mm +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 x 64mm - - 64mm +320°C -
RS Stock No. 788-7835
Mfr. Part No.RT025AS47R0KB
BrandVishay
MYR514.95
Each
units
47Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -