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. 891-5402
Mfr. Part No.RHS25RE
$81.74
Each
units
25Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 144-5528
Mfr. Part No.RHS25RE
$96.29
Each
units
25Ω 10% 25W 300 ° Panel Mount 6.35 mm - Solder 39.62 (Dia.) x 34.93mm 39.62 (Dia.)mm - 34.93mm - Linear Shaft
RS Stock No. 144-5535
Mfr. Part No.RJS50RE
$113.70
Each
units
50Ω 10% 50W 300 ° Panel Mount 6.35 mm - Solder 58.67 (Dia.) x 34.93mm 58.67 (Dia.)mm - 34.93mm - Linear Shaft
RS Stock No. 168-0117
Mfr. Part No.RT025AS1000KB
BrandVishay
$125.103
Each (In a Pack of 25)
units
100Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 891-5512
Mfr. Part No.RJS50RE
$109.91
Each
units
50Ω ±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
$135.29
Each
units
100Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 827-6397
Mfr. Part No.VRH320 33R K
BrandArcol
$337.72
Each
units
33Ω - - - Surface Mount - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS Stock No. 891-5430
Mfr. Part No.RHS5K0E
$65.07
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. 168-0119
Mfr. Part No.RT025AS10R0KB
BrandVishay
$112.167
Each (In a Pack of 25)
units
10Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 827-6400
Mfr. Part No.VRH320 10R K
BrandArcol
$431.63
Each
units
10Ω - - - Surface Mount - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS Stock No. 144-5534
Mfr. Part No.RJS500E
$113.70
Each
units
500Ω 10% 50W 300 ° Panel Mount 6.35 mm - Solder 58.67 (Dia.) x 34.93mm 58.67 (Dia.)mm - 34.93mm - Linear Shaft
RS Stock No. 144-5530
Mfr. Part No.RHS5K0E
$90.51
Each
units
5kΩ 10% 25W 300 ° Panel Mount 6.35 mm - Solder 39.62 (Dia.) x 34.93mm 39.62 (Dia.)mm - 34.93mm - Linear Shaft
RS Stock No. 144-5540
Mfr. Part No.RLS15RE
$219.40
Each
units
15Ω 10% 150W 300 ° Panel Mount 6.35 mm - Solder 101.6 (Dia.) x 50.8mm 101.6 (Dia.)mm - 50.8mm - Linear Shaft
RS Stock No. 788-7823
Mfr. Part No.RT025AS4701KB
BrandVishay
$132.47
Each
units
4.7kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 788-7801
Mfr. Part No.RT025AS15R0KB
BrandVishay
$163.09
Each
units
15Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 788-7804
Mfr. Part No.RT025AS10R0KB
BrandVishay
$129.38
Each
units
10Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 788-7839
Mfr. Part No.RT025AS4R70KB
BrandVishay
$183.36
Each
units
4.7Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 168-0118
Mfr. Part No.RT025AS15R0KB
BrandVishay
$147.554
Each (In a Pack of 25)
units
15Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 168-0128
Mfr. Part No.RT025AS4R70KB
BrandVishay
$169.279
Each (In a Pack of 25)
units
4.7Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS Stock No. 891-5509
Mfr. Part No.RJS500E
$70.25
Each
units
500Ω ±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
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