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. 892-8265
Mfr. Part No.RKS16RE
BrandOhmite
SGD175.44
Each (In a Pack of 5)
units
16Ω ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 891-5326
Mfr. Part No.RES1K0E
SGD79.78
Each
units
1kΩ ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 892-2469
Mfr. Part No.RUS50RE
BrandOhmite
SGD1,274.01
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. 788-7719
Mfr. Part No.RT055AS3300KB
BrandVishay
SGD547.92
Each
units
330Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS Stock No. 891-5341
Mfr. Part No.RES3K5E
SGD80.802
Each (In a Pack of 5)
units
3.5kΩ ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 167-9890
Mfr. Part No.RT055AS22R0KB
BrandVishay
SGD344.705
Each (In a Pack of 25)
units
22Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +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. 891-5629
Mfr. Part No.RNS1K5E
BrandOhmite
SGD433.79
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. 891-5442
Mfr. Part No.RHS750E
SGD97.08
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. 893-5213
Mfr. Part No.RUS2R5
BrandOhmite
SGD1,466.414
Each (In a Pack of 5)
units
2.5Ω ±10% 1kW 335 ° Panel Mount 9.53 mm - Solder Lug 304.8 (Dia.) x 76.2mm - - 76.2mm - Linear Shaft
RS Stock No. 788-7813
Mfr. Part No.RT025AS1501KB
BrandVishay
SGD186.20
Each
units
1.5kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 891-5398
Mfr. Part No.RHS1K0E
SGD76.36
Each
units
1kΩ ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 893-5181
Mfr. Part No.RHL1K5E
BrandOhmite
SGD106.73
Each (In a Pack of 5)
units
1.5kΩ ±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
SGD99.24
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. 891-5376
Mfr. Part No.RHS100E
SGD76.53
Each
units
100Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 788-7801
Mfr. Part No.RT025AS15R0KB
BrandVishay
SGD188.18
Each
units
15Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 892-2403
Mfr. Part No.RPS100E
BrandOhmite
SGD270.274
Each (In a Pack of 10)
units
100Ω ±10% 225W 310 ° Panel Mount 9.53 mm - Solder Lug 127 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 891-5464
Mfr. Part No.RJS150E
BrandOhmite
SGD92.82
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. 892-2416
Mfr. Part No.RRS125E
BrandOhmite
SGD654.16
Each
units
125Ω ±10% 500W 325 ° Panel Mount 9.53 mm - Solder Lug 203.2 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 168-0126
Mfr. Part No.RT025AS2R20KB
BrandVishay
SGD177.909
Each (In a Pack of 25)
units
2.2Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
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