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. 788-7699
Mfr. Part No.RT055AS1000KB
BrandVishay
TWD11,737.00
Each
units
100Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 788-7826
Mfr. Part No.RT025AS22R0KB
BrandVishay
TWD3,995.00
Each
units
22Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 168-0066
Mfr. Part No.RT012AS1000KB
BrandVishay
TWD4,496.40
Each (In a Pack of 25)
units
100Ω ±10% 12W 1 Panel Mount 3 mm 6.5mm Solder Lug 22.5 (Dia.) x 40mm - - 40mm +320°C -
RS Stock No. 892-6663
Mfr. Part No.6532E
BrandOhmite
TWD1,988.00
Each
units
- - - - Coupling Clip - - - - - - - - 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. 891-5424
Mfr. Part No.RHS3R0E
TWD1,990.00
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. 788-7807
Mfr. Part No.RT025AS1500KB
BrandVishay
TWD4,421.00
Each
units
150Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 891-5503
Mfr. Part No.RJS50KE
BrandOhmite
TWD3,330.00
Each
units
50kΩ ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
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. 891-5593
Mfr. Part No.RLS250E
BrandOhmite
TWD5,210.00
Each
units
250Ω ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - 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. 892-5792
Mfr. Part No.RPS50RE
BrandOhmite
TWD7,943.00
Each
units
50Ω ±10% 225W 310 ° Panel Mount 9.53 mm - Solder Lug 127 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 893-5406
Mfr. Part No.RHL10K
BrandOhmite
TWD2,696.60
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. 167-9884
Mfr. Part No.RT055AS2201KB
BrandVishay
TWD9,921.20
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. 893-4106
Mfr. Part No.RGS1K0E
BrandOhmite
TWD3,389.00
Each
units
1kΩ ±10% 75W 300 ° Panel Mount 6.35 mm - Solder Lug 69.25 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 891-5483
Mfr. Part No.RJS22RE
BrandOhmite
TWD2,532.00
Each
units
22Ω ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 892-2438
Mfr. Part No.RRS500E
BrandOhmite
TWD16,148.00
Each
units
500Ω ±10% 500W 325 ° Panel Mount 9.53 mm - Solder Lug 203.2 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 788-7829
Mfr. Part No.RT025AS2R20KB
BrandVishay
TWD5,659.00
Each
units
2.2Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 788-7693
Mfr. Part No.RT055AS1002KB
BrandVishay
TWD14,018.00
Each
units
10kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 168-0121
Mfr. Part No.RT025AS1001KB
BrandVishay
TWD3,122.60
Each (In a Pack of 25)
units
1kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -