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. 892-8448
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. 788-7665
Mfr. Part No.RT012AS2201KB
BrandVishay
TWD5,834.00
Each
units
2.2kΩ ±10% 12W 1 Panel Mount 3 mm 6.5mm Solder Lug 22.5 (Dia.) x 40mm - - 40mm +320°C -
RS Stock No. 893-5175
Mfr. Part No.REE25R
BrandOhmite
TWD4,951.80
Each (In a Pack of 5)
units
25Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 26.59 (Dia.) x 30.96mm - - 30.96mm - Linear Shaft
RS Stock No. 893-5187
Mfr. Part No.RGS7R5E
BrandOhmite
TWD3,609.60
Each (In a Pack of 5)
units
7.5Ω ±10% 75W 300 ° Panel Mount 6.35 mm - Solder Lug 69.25 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 168-0127
Mfr. Part No.RT025AS4700KB
BrandVishay
TWD3,140.20
Each (In a Pack of 25)
units
470Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 893-5440
Mfr. Part No.RPS200
BrandOhmite
TWD10,157.20
Each (In a Pack of 5)
units
200Ω ±10% 225W 310 ° Panel Mount 9.53 mm - Solder Lug 127 (Dia.) x 53.98mm - - 53.98mm - 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. 891-5581
Mfr. Part No.RLS15RE
TWD4,668.00
Each
units
15Ω ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 891-5414
Mfr. Part No.RHS2R0E
TWD2,246.00
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. 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. 891-5480
Mfr. Part No.RJS2R0E
BrandOhmite
TWD3,117.00
Each
units
±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 788-7794
Mfr. Part No.RT025AS1000KB
BrandVishay
TWD4,032.00
Each
units
100Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 893-5216
Mfr. Part No.RUS75RE
BrandOhmite
TWD30,508.60
Each (In a Pack of 5)
units
75Ω ±10% 1kW 335 ° Panel Mount 9.53 mm - Solder Lug 304.8 (Dia.) x 76.2mm - - 76.2mm - Linear Shaft
RS Stock No. 891-5613
Mfr. Part No.RLS7R5E
BrandOhmite
TWD4,679.60
Each (In a Pack of 5)
units
7.5Ω ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 892-8221
Mfr. Part No.RKS750E
BrandOhmite
TWD4,067.00
Each
units
750Ω ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 891-5452
Mfr. Part No.RJS125E
BrandOhmite
TWD2,732.00
Each
units
125Ω ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 167-9917
Mfr. Part No.RT500AS1001KB
BrandVishay
TWD33,427.20
Each (In a Pack of 25)
units
1kΩ ±10% 500W 1 Panel Mount 10 mm 12mm Solder Lug 143 (Dia.) x 158mm - - 158mm +320°C -
RS Stock No. 892-2412
Mfr. Part No.RPS200E
BrandOhmite
TWD7,534.60
Each (In a Pack of 10)
units
200Ω ±10% 225W 310 ° Panel Mount 9.53 mm - Solder Lug 127 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 892-8265
Mfr. Part No.RKS16RE
BrandOhmite
TWD3,873.20
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. 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 -