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 201 - 220 of 248 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. 144-5531
Mfr. Part No.RJS12RE
SGD99.65
Each
units
12Ω 10% 50W 300 ° Panel Mount 6.35 mm - Solder 58.67 (Dia.) x 34.93mm 58.67 (Dia.)mm - 34.93mm - Linear Shaft
RS Stock No. 168-0119
Mfr. Part No.RT025AS10R0KB
BrandVishay
SGD111.15
Each (In a Pack of 25)
units
10Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 891-5540
Mfr. Part No.RKS1K0E
BrandOhmite
SGD204.11
Each
units
1kΩ ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 891-5515
Mfr. Part No.RJS5K0E
BrandOhmite
SGD114.88
Each
units
5kΩ ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 891-5408
Mfr. Part No.RHS25KE
SGD64.57
Each
units
25kΩ ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 892-8221
Mfr. Part No.RKS750E
BrandOhmite
SGD184.22
Each
units
750Ω ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 892-8344
Mfr. Part No.RHS125E
BrandOhmite
SGD93.58
Each
units
125Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 891-5294
Mfr. Part No.RCS100E
SGD241.054
Each (In a Pack of 5)
units
100Ω ±10% 7.5W 300 ° Panel Mount 3.18 mm - Solder Lug 13.08 (Dia.) x 15.88mm - - 15.88mm - Linear Shaft
RS Stock No. 892-2469
Mfr. Part No.RUS50RE
BrandOhmite
SGD1,320.51
Each
units
50Ω ±10% 1kW 335 ° Panel Mount 9.53 mm - Solder Lug 304.8 (Dia.) x 76.2mm - - 76.2mm - Linear Shaft
RS Stock No. 893-5200
Mfr. Part No.RPS150E
BrandOhmite
SGD300.694
Each (In a Pack of 5)
units
150Ω ±10% 225W 310 ° Panel Mount 9.53 mm - Solder Lug 127 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 788-7817
Mfr. Part No.RT025AS2200KB
BrandVishay
SGD157.28
Each
units
220Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 893-5406
Mfr. Part No.RHL10K
BrandOhmite
SGD112.138
Each (In a Pack of 5)
units
10kΩ ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 892-6663
Mfr. Part No.6532E
BrandOhmite
SGD85.15
Each
units
- - - - Coupling Clip - - - - - - - - Linear Shaft
RS Stock No. 891-5496
Mfr. Part No.RJS3K5E
BrandOhmite
SGD115.13
Each
units
3.5kΩ ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 168-0116
Mfr. Part No.RT100AS1001KB
BrandVishay
SGD295.709
Each (In a Pack of 25)
units
1kΩ ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 (Dia.) x 81mm - - 81mm +320°C -
RS Stock No. 891-5638
Mfr. Part No.RNS300E
BrandOhmite
SGD430.20
Each
units
300Ω ±10% 300W 320 ° Panel Mount 9.53 mm - Solder Lug 152.4 (Dia.) x 60.33mm - - 60.33mm - Linear Shaft
RS Stock No. 891-5395
Mfr. Part No.RHS1R0E
SGD101.18
Each
units
±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 788-7693
Mfr. Part No.RT055AS1002KB
BrandVishay
SGD477.85
Each
units
10kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 893-5266
Mfr. Part No.RNS800E
BrandOhmite
SGD931.25
Each
units
800Ω ±10% 300W 320 ° Panel Mount 9.53 mm - Solder Lug 152.4 (Dia.) x 60.33mm - - 60.33mm - Linear Shaft
RS Stock No. 893-5181
Mfr. Part No.RHL1K5E
BrandOhmite
SGD106.73
Each (In a Pack of 5)
units
1.5kΩ ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
Related Products
Ohmite RH series wirewound rheostats are designed and ...
Description:
Ohmite RH series wirewound rheostats are designed and manufactured to operate smoothly and reliably over long periods of use. The RH series has a ceramic body with high grade resistance alloy linear taper windings and a vitreous enamel coating. HR ...
The Vishay RT Series of linear wire wound ...
Description:
The Vishay RT Series of linear wire wound rheostats are designed for use in professional and industrial equipment. Particularly in equipment where transients, repeated overloads, impacts and vibrations characterise everyday operation.Suggested accessories for these rheostats include control buttons and displays. ...
Slide rheostats, for bench useLinear wirewound trackThese products ...
Description:
Slide rheostats, for bench useLinear wirewound trackThese products are suitable for use in laboratories, universities etc.
Ohmite RH series wirewound rheostats are designed and ...
Description:
Ohmite RH series wirewound rheostats are designed and manufactured to operate smoothly and reliably over long periods of use. The RH series has a ceramic body with high grade resistance alloy linear taper windings and a vitreous enamel coating. HR ...