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. 891-5571
Mfr. Part No.RLS100E
BrandOhmite
SGD246.92
Each
units
100Ω ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - 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. 893-5193
Mfr. Part No.RJS10K
BrandOhmite
SGD126.692
Each (In a Pack of 5)
units
10kΩ ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 788-7671
Mfr. Part No.RT100AS1000KB
BrandVishay
SGD375.29
Each
units
100Ω ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 (Dia.) x 81mm - - 81mm +320°C -
RS Stock No. 891-5483
Mfr. Part No.RJS22RE
BrandOhmite
SGD110.57
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. 892-8344
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. 891-5385
Mfr. Part No.RHS15RE
SGD85.12
Each
units
15Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 891-5565
Mfr. Part No.RKS5K0E
BrandOhmite
SGD203.65
Each
units
5kΩ ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 788-7826
Mfr. Part No.RT025AS22R0KB
BrandVishay
SGD151.99
Each
units
22Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 788-7687
Mfr. Part No.RT230AS1000KB
BrandVishay
SGD644.58
Each
units
100Ω ±10% 250W 1 Panel Mount 10 mm 12mm Solder Lug 143 (Dia.) x 125mm - - 125mm +320°C -
RS Stock No. 891-5616
Mfr. Part No.RNS100E
BrandOhmite
SGD414.63
Each
units
100Ω ±10% 300W 320 ° Panel Mount 9.53 mm - Solder Lug 152.4 (Dia.) x 60.33mm - - 60.33mm - Linear Shaft
RS Stock No. 893-4100
Mfr. Part No.RLS1R0E
BrandOhmite
SGD216.70
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. 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. 891-5528
Mfr. Part No.RJS800E
BrandOhmite
SGD115.80
Each
units
800Ω ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 891-5420
Mfr. Part No.RHS3K5E
SGD96.91
Each
units
3.5kΩ ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 168-0122
Mfr. Part No.RT025AS1501KB
BrandVishay
SGD178.449
Each (In a Pack of 25)
units
1.5kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 892-8638
Mfr. Part No.6533E
BrandOhmite
SGD85.15
Each
units
- - - - Coupling Clip - - - - - - - - Linear Shaft
RS Stock No. 891-5332
Mfr. Part No.RES250E
SGD72.82
Each
units
250Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 893-3472
Mfr. Part No.RNS5R0E
BrandOhmite
SGD365.94
Each
units
±10% 300W 320 ° Panel Mount 9.53 mm - Solder Lug 152.4 (Dia.) x 60.33mm - - 60.33mm - Linear Shaft
RS Stock No. 893-3400
Mfr. Part No.RES35RE
BrandOhmite
SGD75.84
Each
units
35Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
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