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. 891-5442
Mfr. Part No.RHS750E
BrandOhmite
TWD1,704
Each
units
750Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 827-6397
Mfr. Part No.VRH320 33R K
BrandArcol
TWD5,925
Each
units
33Ω - - - Surface Mount - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS Stock No. 891-5395
Mfr. Part No.RHS1R0E
BrandOhmite
TWD1,125
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. 788-7696
Mfr. Part No.RT500AS1000KB
BrandVishay
TWD33,280
Each
units
100Ω ±10% 500W 1 Panel Mount 10 mm 12mm Solder Lug 143 (Dia.) x 158mm - - 158mm +320°C -
RS Stock No. 167-9907
Mfr. Part No.RT500AS1000KB
BrandVishay
TWD58,944
Each (In a Pack of 25)
units
100Ω ±10% 500W 1 Panel Mount 10 mm 12mm Solder Lug 143 (Dia.) x 158mm - - 158mm +320°C -
RS Stock No. 892-2422
Mfr. Part No.RRS250E
BrandOhmite
TWD11,349
Each
units
250Ω ±10% 500W 325 ° Panel Mount 9.53 mm - Solder Lug 203.2 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 167-9888
Mfr. Part No.RT055AS1000KB
BrandVishay
TWD5,664
Each (In a Pack of 25)
units
100Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 167-9889
Mfr. Part No.RT055AS4701KB
BrandVishay
TWD6,368
Each (In a Pack of 25)
units
4.7kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 892-2425
Mfr. Part No.RRS12R5E
BrandOhmite
TWD12,296
Each (In a Pack of 5)
units
12.5Ω ±10% 500W 325 ° Panel Mount 9.53 mm - Solder Lug 203.2 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 892-2453
Mfr. Part No.RUS10RE
BrandOhmite
TWD28,191
Each (In a Pack of 5)
units
10Ω ±10% 1kW 335 ° Panel Mount 9.53 mm - Solder Lug 304.8 (Dia.) x 76.2mm - - 76.2mm - Linear Shaft
RS Stock No. 892-8530
Mfr. Part No.RUS16RE
BrandOhmite
TWD22,555
Each (In a Pack of 10)
units
16Ω ±10% 1kW 335 ° Panel Mount 9.53 mm - Solder Lug 304.8 (Dia.) x 76.2mm - - 76.2mm - Linear Shaft
RS Stock No. 892-2428
Mfr. Part No.RRS1R0E
BrandOhmite
TWD13,241
Each
units
±10% 500W 325 ° Panel Mount 9.53 mm - Solder Lug 203.2 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 891-5477
Mfr. Part No.RJS1K0E
BrandOhmite
TWD1,317
Each
units
1kΩ ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 167-9890
Mfr. Part No.RT055AS22R0KB
BrandVishay
TWD5,664
Each (In a Pack of 25)
units
22Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 144-5535
Mfr. Part No.RJS50RE
BrandOhmite
TWD2,411
Each
units
50Ω 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. 167-9884
Mfr. Part No.RT055AS2201KB
BrandVishay
TWD5,664
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. 893-5298
Mfr. Part No.RKS2K0E
BrandOhmite
TWD3,259
Each (In a Pack of 5)
units
2kΩ ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 892-8565
Mfr. Part No.RLS5R0E
BrandOhmite
TWD3,702
Each
units
±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 892-2469
Mfr. Part No.RUS50RE
BrandOhmite
TWD22,555
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. 827-6413
Mfr. Part No.VRH320 100R K
BrandArcol
TWD7,407
Each
units
100Ω - - - Surface Mount - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide