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. 891-5474
Mfr. Part No.RJS225E
BrandOhmite
MYR218.71
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. 892-8085
Mfr. Part No.RUS100E
BrandOhmite
MYR3,746.79
Each
units
100Ω ±10% 1kW 335 ° Panel Mount 9.53 mm - Solder Lug 304.8 (Dia.) x 76.2mm - - 76.2mm - Linear Shaft
RS Stock No. 891-5632
Mfr. Part No.RNS50RE
BrandOhmite
MYR928.55
Each
units
50Ω ±10% 300W 320 ° Panel Mount 9.53 mm - Solder Lug 152.4 (Dia.) x 60.33mm - - 60.33mm - Linear Shaft
RS Stock No. 893-5272
Mfr. Part No.RRS3R0
BrandOhmite
MYR1,556.778
Each (In a Pack of 5)
units
±10% 500W 325 ° Panel Mount 9.53 mm - Solder Lug 203.2 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 892-8530
Mfr. Part No.RUS16RE
BrandOhmite
MYR3,017.20
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. 891-5593
Mfr. Part No.RLS250E
BrandOhmite
MYR434.05
Each
units
250Ω ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 892-2453
Mfr. Part No.RUS10RE
BrandOhmite
MYR3,771.164
Each (In a Pack of 5)
units
10Ω ±10% 1kW 335 ° Panel Mount 9.53 mm - Solder Lug 304.8 (Dia.) x 76.2mm - - 76.2mm - Linear Shaft
RS Stock No. 891-5534
Mfr. Part No.RJSR50E
BrandOhmite
MYR320.62
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. 891-5464
Mfr. Part No.RJS150E
BrandOhmite
MYR204.09
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. 892-2510
Mfr. Part No.5E-100
BrandOhmite
MYR2.192
Each (In a Pack of 50)
units
- - 8 W, 12 W - - - - - - - - - - -
RS Stock No. 892-2469
Mfr. Part No.RUS50RE
BrandOhmite
MYR3,017.20
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. 892-5027
Mfr. Part No.RUS25R
BrandOhmite
MYR4,110.584
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. 892-8271
Mfr. Part No.RJS1K6E
BrandOhmite
MYR204.64
Each
units
1.6kΩ ±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
MYR4.674
Each (In a Pack of 50)
units
- - 175 W, 225 W - - - - - - - - - - -
RS Stock No. 891-5559
Mfr. Part No.RKS2R0E
BrandOhmite
MYR367.63
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. 892-8265
Mfr. Part No.RKS16RE
BrandOhmite
MYR381.576
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. 891-5590
Mfr. Part No.RLS1K25E
BrandOhmite
MYR459.74
Each
units
1.2kΩ ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 893-5175
Mfr. Part No.REE25R
BrandOhmite
MYR473.894
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. 892-8344
Mfr. Part No.RHS125E
BrandOhmite
MYR180.41
Each
units
125Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 892-6698
Mfr. Part No.RES125E
BrandOhmite
MYR155.04
Each
units
125Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft