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. 891-5616
Mfr. Part No.RNS100E
BrandOhmite
TWD9,497.00
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. 892-6698
Mfr. Part No.RES125E
BrandOhmite
TWD1,825.00
Each
units
125Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 893-3400
Mfr. Part No.RES35RE
BrandOhmite
TWD1,681.00
Each
units
35Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 893-4715
Mfr. Part No.RLSR50E
BrandOhmite
TWD5,002.00
Each
units
500mΩ ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 893-5216
Mfr. Part No.RUS75RE
BrandOhmite
TWD26,608.20
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. 891-5559
Mfr. Part No.RKS2R0E
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. 893-5181
Mfr. Part No.RHL1K5E
BrandOhmite
TWD2,332.40
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. 893-3406
Mfr. Part No.RES2R0E
BrandOhmite
TWD1,909.00
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. 893-4106
Mfr. Part No.RGS1K0E
BrandOhmite
TWD3,389.00
Each
units
1kΩ ±10% 75W 300 ° Panel Mount 6.35 mm - Solder Lug 69.25 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 892-6663
Mfr. Part No.6532E
BrandOhmite
TWD1,950.00
Each
units
- - - - Coupling Clip - - - - - - - - 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. 892-8577
Mfr. Part No.RKS10KE
BrandOhmite
TWD5,284.00
Each
units
10kΩ ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 891-5622
Mfr. Part No.RNS1R0E
BrandOhmite
TWD9,988.00
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. 891-5597
Mfr. Part No.RLS25RE
BrandOhmite
TWD4,699.00
Each
units
25Ω ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 891-5534
Mfr. Part No.RJSR50E
BrandOhmite
TWD3,119.00
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. 893-5193
Mfr. Part No.RJS10K
BrandOhmite
TWD2,901.80
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. 892-2422
Mfr. Part No.RRS250E
BrandOhmite
TWD15,530.00
Each
units
250Ω ±10% 500W 325 ° Panel Mount 9.53 mm - Solder Lug 203.2 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 891-5515
Mfr. Part No.RJS5K0E
BrandOhmite
TWD2,662.00
Each
units
5kΩ ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
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. 891-5474
Mfr. Part No.RJS225E
BrandOhmite
TWD2,062.00
Each
units
225Ω ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft