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.
Rheostats
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Filters
| 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.
827-6413
Mfr. Part No.VRH320 100R K
BrandArcol
|
£152.00
Each
Units
|
100Ω | - | - | - | Surface Mount | - | - | Solder Lug | 446 x 93 x 150mm | 93mm | 150mm | 446mm | - | Slide |
|
RS Stock No.
827-6400
Mfr. Part No.VRH320 10R K
BrandArcol
|
£172.00
Each
Units
|
10Ω | - | - | - | Surface Mount | - | - | Solder Lug | 446 x 93 x 150mm | 93mm | 150mm | 446mm | - | Slide |
|
RS Stock No.
827-6397
Mfr. Part No.VRH320 33R K
BrandArcol
|
£121.80
Each
Units
|
33Ω | - | - | - | Surface Mount | - | - | Solder Lug | 446 x 93 x 150mm | 93mm | 150mm | 446mm | - | Slide |
|
RS Stock No.
891-5512
Mfr. Part No.RJS50RE
BrandArcol Ohmite
|
£42.38
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.
144-5535
Mfr. Part No.RJS50RE
BrandArcol Ohmite
|
£42.38
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.
144-5524
Mfr. Part No.RHS10KE
BrandArcol Ohmite
|
£41.37
Each
Units
|
10kΩ | 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.
891-5379
Mfr. Part No.RHS10KE
BrandArcol Ohmite
|
£41.37
Each
Units
|
10kΩ | ±10% | 25W | 300 ° | Panel Mount | 6.35 mm | - | Solder Lug | 39.62 (Dia.) x 34.93mm | - | - | 34.93mm | - | Linear Shaft |
|
RS Stock No.
167-9917
Mfr. Part No.RT500AS1001KB
BrandVishay
|
£825.183
Each (In a Pack of 25)
Units
|
1kΩ | ±10% | 500W | 1 | Panel Mount | 10 mm | 12mm | Solder Lug | 143 (Dia.) x 158mm | - | - | 158mm | +320°C | - |
|
|
RS Stock No.
788-7677
Mfr. Part No.RT500AS1001KB
BrandVishay
|
£916.87
Each
Units
|
1kΩ | ±10% | 500W | 1 | Panel Mount | 10 mm | 12mm | Solder Lug | 143 (Dia.) x 158mm | - | - | 158mm | +320°C | - |
|
RS Stock No.
827-6407
Mfr. Part No.VRH320 1K K
BrandArcol
|
£136.31
Each
Units
|
1kΩ | ±10% | - | - | Surface Mount | - | - | Solder Lug | 446 x 93 x 150mm | 93mm | 150mm | 446mm | - | Slide |
|
RS Stock No.
167-9820
Mfr. Part No.RT025AS47R0KB
BrandVishay
|
£48.222
Each (In a Pack of 25)
Units
|
47Ω | ±10% | 25W | 1 | Panel Mount | 6 mm | 10.5mm | Solder Lug | 38 (Dia.) x 50mm | - | - | 50mm | +320°C | - |
|
|
RS Stock No.
788-7835
Mfr. Part No.RT025AS47R0KB
BrandVishay
|
£62.01
Each
Units
|
47Ω | ±10% | 25W | 1 | Panel Mount | 6 mm | 10.5mm | Solder Lug | 38 (Dia.) x 50mm | - | - | 50mm | +320°C | - |
|
RS Stock No.
144-5528
Mfr. Part No.RHS25RE
BrandArcol Ohmite
|
£34.39
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.
168-0124
Mfr. Part No.RT025AS4701KB
BrandVishay
|
£48.46
Each (In a Pack of 25)
Units
|
4.7kΩ | ±10% | 25W | 1 | Panel Mount | 6 mm | 10.5mm | Solder Lug | 38 (Dia.) x 50mm | - | - | 50mm | +320°C | - |
|
|
RS Stock No.
788-7823
Mfr. Part No.RT025AS4701KB
BrandVishay
|
£74.78
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.
144-5525
Mfr. Part No.RHS10RE
BrandArcol Ohmite
|
£40.89
Each
Units
|
10Ω | 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.
891-5571
Mfr. Part No.RLS100E
BrandOhmite
|
£111.12
Each
Units
|
100Ω | ±10% | 150W | 300 ° | Panel Mount | 6.35 mm | - | Solder Lug | 101.6 (Dia.) x 50.8mm | - | - | 50.8mm | - | Linear Shaft |
|
|
RS Stock No.
168-0123
Mfr. Part No.RT025AS2200KB
BrandVishay
|
£45.353
Each (In a Pack of 25)
Units
|
220Ω | ±10% | 25W | 1 | Panel Mount | 6 mm | 10.5mm | Solder Lug | 38 (Dia.) x 50mm | - | - | 50mm | +320°C | - |
|
|
RS Stock No.
788-7706
Mfr. Part No.RT055AS22R0KB
BrandVishay
|
£205.55
Each
Units
|
22Ω | ±10% | 55W | 1 | Panel Mount | 6 mm | 10.5mm | Solder Lug | 60 (Dia.) x 64mm | - | - | 64mm | +320°C | - |
|
RS Stock No.
891-5626
Mfr. Part No.RNS200E
BrandOhmite
|
£203.28
Each
Units
|
200Ω | ±10% | 300W | 320 ° | Panel Mount | 9.53 mm | - | Solder Lug | 152.4 (Dia.) x 60.33mm | - | - | 60.33mm | - | Linear Shaft |
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