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. 891-5310
Mfr. Part No.RES10RE
£39.43
Each
Units
10Ω ±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
£41.64
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. 891-5540
Mfr. Part No.RKS1K0E
BrandOhmite
£99.48
Each
Units
1kΩ ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 891-5474
Mfr. Part No.RJS225E
BrandOhmite
£41.07
Each
Units
225Ω ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 891-5483
Mfr. Part No.RJS22RE
BrandOhmite
£54.00
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. 795-4838
Mfr. Part No.RT055AS1001KB
BrandVishay
£141.57
Each
Units
1kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm 64mm - 60 (Dia.)mm +320°C -
RS Stock No. 891-5638
Mfr. Part No.RNS300E
BrandOhmite
£200.51
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. 167-8663
Mfr. Part No.RT055AS1001KB
BrandVishay
£102.60
Each (In a Pack of 25)
Units
1kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm 64mm - 60 (Dia.)mm +320°C -
RS Stock No. 144-5529
Mfr. Part No.RHS50RE
£40.97
Each
Units
50Ω 10% 25W 300 ° Panel Mount 6.35 mm - Solder 39.62 (Dia.) x 34.93mm 39.62 (Dia.)mm - 34.93mm - Linear Shaft
RS Stock No. 891-5458
Mfr. Part No.RJS10KE
BrandOhmite
£56.99
Each
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. 892-2475
Mfr. Part No.12E-100
BrandOhmite
£1.00
Each (In a Pack of 50)
Units
- - 100W - - - - - - - - - - -
RS Stock No. 788-7687
Mfr. Part No.RT230AS1000KB
BrandVishay
£277.55
Each
Units
100Ω ±10% 250W 1 Panel Mount 10 mm 12mm Solder Lug 143 (Dia.) x 125mm - - 125mm +320°C -
RS Stock No. 144-5522
Mfr. Part No.RES50RE
£39.43
Each
Units
50Ω 10% 12.5W 300 ° Panel Mount 3.18 mm - Solder 22.23 (Dia.) x 17.46mm 22.23 (Dia.)mm - 17.46mm - Linear Shaft
RS Stock No. 167-9905
Mfr. Part No.RT230AS1000KB
BrandVishay
£272.928
Each (In a Pack of 25)
Units
100Ω ±10% 250W 1 Panel Mount 10 mm 12mm Solder Lug 143 (Dia.) x 125mm - - 125mm +320°C -
RS Stock No. 892-8530
Mfr. Part No.RUS16RE
BrandOhmite
£685.882
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. 891-5348
Mfr. Part No.RES350E
£37.554
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. 167-9891
Mfr. Part No.RT055AS10R0KB
BrandVishay
£105.45
Each (In a Pack of 25)
Units
10Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 788-7703
Mfr. Part No.RT055AS10R0KB
BrandVishay
£168.00
Each
Units
10Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 891-5534
Mfr. Part No.RJSR50E
BrandOhmite
£69.49
Each
Units
500mΩ ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 891-5600
Mfr. Part No.RLS500E
BrandOhmite
£116.68
Each
Units
500Ω ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
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