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. 891-5629
Mfr. Part No.RNS1K5E
BrandOhmite
TWD8,756.00
Each
units
1.5kΩ ±10% 300W 320 ° Panel Mount 9.53 mm - Solder Lug 152.4 (Dia.) x 60.33mm - - 60.33mm - Linear Shaft
RS Stock No. 892-8394
Mfr. Part No.RNS2K5E
BrandOhmite
TWD9,225.00
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. 892-2456
Mfr. Part No.RUS1R0E
BrandOhmite
TWD33,172.00
Each
units
±10% 1kW 335 ° Panel Mount 9.53 mm - Solder Lug 304.8 (Dia.) x 76.2mm - - 76.2mm - Linear Shaft
RS Stock No. 891-5339
Mfr. Part No.RES2K5E
TWD2,103.00
Each
units
2.5kΩ ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 892-2428
Mfr. Part No.RRS1R0E
BrandOhmite
TWD14,673.00
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. 891-5464
Mfr. Part No.RJS150E
BrandOhmite
TWD2,246.00
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. 167-9886
Mfr. Part No.RT055AS1002KB
BrandVishay
TWD11,153.40
Each (In a Pack of 25)
units
10kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 892-8448
Mfr. Part No.RLS350E
BrandOhmite
TWD4,880.60
Each (In a Pack of 5)
units
350Ω ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 788-7839
Mfr. Part No.RT025AS4R70KB
BrandVishay
TWD5,240.00
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. 891-5354
Mfr. Part No.RES500E
TWD1,957.00
Each
units
500Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 167-9893
Mfr. Part No.RT100AS1002KB
BrandVishay
TWD7,352.80
Each (In a Pack of 25)
units
10kΩ ±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
TWD3,570.00
Each
units
47Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 892-2453
Mfr. Part No.RUS10RE
BrandOhmite
TWD33,375.40
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. 891-5351
Mfr. Part No.RES5K0E
TWD2,053.00
Each
units
5kΩ ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 892-2475
Mfr. Part No.12E-100
BrandOhmite
TWD44.90
Each (In a Pack of 50)
units
- - 100W - - - - - - - - - - -
RS Stock No. 891-5348
Mfr. Part No.RES350E
TWD1,754.60
Each (In a Pack of 5)
units
350Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 891-5345
Mfr. Part No.RES3R0E
TWD2,063.00
Each
units
±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 2509031132
Mfr. Part No.232P21
BrandOhmite
TWD1,962.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2508305924
Mfr. Part No.232P19
BrandOhmite
TWD2,433.00
Each
units
- - - - - - - - - - - - - -