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. 788-7683
Mfr. Part No.RT100AS22R0KB
BrandVishay
TWD11,192.00
Each
units
22Ω ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 (Dia.) x 81mm - - 81mm +320°C -
RS Stock No. 827-6413
Mfr. Part No.VRH320 100R K
BrandArcol
TWD5,379.00
Each
units
100Ω - - - Surface Mount - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS Stock No. 891-5607
Mfr. Part No.RLS4K5E
BrandOhmite
TWD5,857.00
Each
units
4.5kΩ ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 891-5408
Mfr. Part No.RHS25KE
TWD2,624.00
Each
units
25kΩ ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 891-5430
Mfr. Part No.RHS5K0E
TWD1,650.00
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. 891-5449
Mfr. Part No.RHS6R0E
BrandOhmite
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. 892-2431
Mfr. Part No.RRS25RE
BrandOhmite
TWD15,530.00
Each
units
25Ω ±10% 500W 325 ° Panel Mount 9.53 mm - Solder Lug 203.2 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 891-5543
Mfr. Part No.RKS1R0E
BrandOhmite
TWD5,111.00
Each
units
±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 892-2444
Mfr. Part No.RRS8R0E
BrandOhmite
TWD12,600.00
Each
units
±10% 500W 325 ° Panel Mount 9.53 mm - Solder Lug 203.2 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 893-5459
Mfr. Part No.RNS75R
BrandOhmite
TWD7,735.80
Each (In a Pack of 5)
units
75Ω ±10% 300W 320 ° Panel Mount 9.53 mm - Solder Lug 152.4 (Dia.) x 60.33mm - - 60.33mm - Linear Shaft
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. 891-5418
Mfr. Part No.RHS350E
TWD2,144.00
Each
units
350Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 893-1088
Mfr. Part No.RES200E
BrandOhmite
TWD1,279.20
Each (In a Pack of 5)
units
200Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 168-0127
Mfr. Part No.RT025AS4700KB
BrandVishay
TWD2,428.00
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. 892-5027
Mfr. Part No.RUS25R
BrandOhmite
TWD29,003.00
Each (In a Pack of 5)
units
25Ω ±10% 1kW 335 ° Panel Mount 9.53 mm - Solder Lug 304.8 (Dia.) x 76.2mm - - 76.2mm - Linear Shaft
RS Stock No. 891-5540
Mfr. Part No.RKS1K0E
BrandOhmite
TWD4,444.00
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. 795-4847
Mfr. Part No.RT025AS2201KB
BrandVishay
TWD3,246.00
Each
units
2.2kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 Dia.x 50mm 50mm - 38 (Dia.)mm +320°C -
RS Stock No. 891-5492
Mfr. Part No.RJS35RE
BrandOhmite
TWD2,574.00
Each
units
35Ω ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 891-5468
Mfr. Part No.RJS16RE
BrandOhmite
TWD3,102.00
Each
units
16Ω ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 892-2507
Mfr. Part No.18E-100
BrandOhmite
TWD47.20
Each (In a Pack of 50)
units
- - 175 W, 225 W - - - - - - - - - - -