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. 891-5430
Mfr. Part No.RHS5K0E
BrandOhmite
TWD1,157
Each
units
5kΩ ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 893-4279
Mfr. Part No.RHL5K0E
BrandOhmite
TWD1,308
Each
units
5kΩ ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - 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. 892-8085
Mfr. Part No.RUS100E
BrandOhmite
TWD28,009
Each
units
100Ω ±10% 1kW 335 ° Panel Mount 9.53 mm - Solder Lug 304.8 (Dia.) x 76.2mm - - 76.2mm - Linear Shaft
RS Stock No. 891-5433
Mfr. Part No.RHS500E
BrandOhmite
TWD1,010
Each
units
500Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - 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. 891-5452
Mfr. Part No.RJS125E
BrandOhmite
TWD1,254
Each
units
125Ω ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 892-2510
Mfr. Part No.5E-100
BrandOhmite
TWD16
Each (In a Pack of 50)
units
- - 8 W, 12 W - - - - - - - - - - -
RS Stock No. 891-5301
Mfr. Part No.RES10KE
BrandOhmite
TWD1,141
Each
units
10kΩ ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 891-5464
Mfr. Part No.RJS150E
BrandOhmite
TWD1,598
Each
units
150Ω ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 893-5392
Mfr. Part No.RKSR50E
BrandOhmite
TWD3,698
Each (In a Pack of 5)
units
500mΩ ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 795-4847
Mfr. Part No.RT025AS2201KB
BrandVishay
TWD2,369
Each
units
2.2kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 Dia.x 50mm 50mm - 38 (Dia.)mm +320°C -
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. 892-8394
Mfr. Part No.RNS2K5E
BrandOhmite
TWD8,182
Each
units
2.5Ω ±10% 300W 320 ° Panel Mount 9.53 mm - Solder Lug 152.4 (Dia.) x 60.33mm - - 60.33mm - Linear Shaft
RS Stock No. 891-5436
Mfr. Part No.RHS50RE
BrandOhmite
TWD1,010
Each
units
50Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft