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. 891-5442
Mfr. Part No.RHS750E
TWD2,144.00
Each
units
750Ω ±10% 25W 1 Panel Mount 6.35 mm - Solder Lug 39.62 x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 827-6397
Mfr. Part No.VRH320 33R K
BrandArcol
TWD8,077.00
Each
units
33Ω ±10% - - Freestanding - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS Stock No. 891-5395
Mfr. Part No.RHS1R0E
TWD2,246.00
Each
units
±10% 25W 1 Panel Mount 6.35 mm - Solder Lug 39.62 x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 893-5204
Mfr. Part No.RRS175E
BrandOhmite
TWD15,530.00
Each
units
175Ω ±10% 500W 1 Panel Mount 9.53 mm - Solder Lug 203.2 x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 891-5571
Mfr. Part No.RLS100E
BrandOhmite
TWD4,826.00
Each
units
100Ω ±10% 150W 1 Panel Mount 6.35 mm - Solder Lug 101.6 x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 144-5529
Mfr. Part No.RHS50RE
TWD2,251.00
Each
units
50Ω 10% 25W 1 Panel Mount 6.35 mm - Solder 39.62 x 34.93mm 39.62mm - 34.93mm - Linear Shaft
RS Stock No. 788-7801
Mfr. Part No.RT025AS15R0KB
BrandVishay
TWD5,028.00
Each
units
15Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 893-3400
Mfr. Part No.RES35RE
BrandOhmite
TWD1,737.00
Each
units
35Ω ±10% 12.5W 1 Panel Mount 3.18 mm - Solder Lug 22.23 x 17.46mm - - 17.46mm - Linear Shaft
RS Stock No. 893-5207
Mfr. Part No.RLS2R0E
BrandOhmite
TWD4,771.60
Each (In a Pack of 5)
units
±10% 150W 1 Panel Mount 6.35 mm - Solder Lug 101.6 x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 891-5587
Mfr. Part No.RLS150E
BrandOhmite
TWD5,192.00
Each
units
150Ω ±10% 150W 1 Panel Mount 6.35 mm - Solder Lug 101.6 x 50.8mm - - 50.8mm - Linear Shaft
RS Stock No. 893-3472
Mfr. Part No.RNS5R0E
BrandOhmite
TWD9,101.00
Each
units
±10% 300W 1 Panel Mount 9.53 mm - Solder Lug 152.4 x 60.33mm - - 60.33mm - Linear Shaft
RS Stock No. 893-5266
Mfr. Part No.RNS800E
BrandOhmite
TWD20,935.00
Each
units
800Ω ±10% 300W 1 Panel Mount 9.53 mm - Solder Lug 152.4 x 60.33mm - - 60.33mm - Linear Shaft
RS Stock No. 891-5575
Mfr. Part No.RLS10KE
BrandOhmite
TWD5,755.00
Each
units
10kΩ ±10% 150W 1 Panel Mount 6.35 mm - Solder Lug 101.6 x 50.8mm - - 50.8mm - 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 1 Panel Mount 6.35 mm - Solder Lug 69.25 x 44.45mm - - 44.45mm - Linear Shaft
RS Stock No. 893-5197
Mfr. Part No.RLS1K8
BrandOhmite
TWD6,082.20
Each (In a Pack of 5)
units
1.8kΩ ±10% 150W 1 Panel Mount 6.35 mm - Solder Lug 101.6 x 50.8mm - - 50.8mm - 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 x 50mm - - 50mm +320°C -
RS Stock No. 892-2425
Mfr. Part No.RRS12R5E
BrandOhmite
TWD15,335.60
Each (In a Pack of 5)
units
12.5Ω ±10% 500W 1 Panel Mount 9.53 mm - Solder Lug 203.2 x 53.98mm - - 53.98mm - Linear Shaft
RS Stock No. 168-0120
Mfr. Part No.RT025AS1500KB
BrandVishay
TWD3,222.30
Each (In a Pack of 25)
units
150Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 x 50mm - - 50mm +320°C -
RS Stock No. 891-5446
Mfr. Part No.RHS75RE
TWD2,144.00
Each
units
75Ω ±10% 25W 1 Panel Mount 6.35 mm - Solder Lug 39.62 x 34.93mm - - 34.93mm - Linear Shaft
RS Stock No. 892-2447
Mfr. Part No.RRS50RE
BrandOhmite
TWD16,740.00
Each
units
50Ω ±10% 500W 1 Panel Mount 9.53 mm - Solder Lug 203.2 x 53.98mm - - 53.98mm - Linear Shaft