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庫存編號 893-3406
製造零件編號RES2R0E
BrandOhmite
HK$312.18
單位
±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS庫存編號 891-5339
製造零件編號RES2K5E
HK$296.25
單位
2.5kΩ ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS庫存編號 893-5175
製造零件編號REE25R
BrandOhmite
HK$904.038
/個 (每包:5個)
單位
25Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 26.59 (Dia.) x 30.96mm - - 30.96mm - Linear Shaft
RS庫存編號 788-7810
製造零件編號RT025AS1001KB
BrandVishay
HK$540.00
單位
1kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 144-5523
製造零件編號RHS100E
HK$446.35
單位
100Ω 10% 25W 300 ° Panel Mount 6.35 mm - Solder 39.62 (Dia.) x 34.93mm 39.62 (Dia.)mm - 34.93mm - Linear Shaft
RS庫存編號 891-5506
製造零件編號RJS4R0E
BrandOhmite
HK$388.73
單位
±10% 50W 300 ° Panel Mount 6.35 mm - Solder Lug 58.67 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS庫存編號 168-0128
製造零件編號RT025AS4R70KB
BrandVishay
HK$886.034
/個 (每包:25個)
單位
4.7Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 891-5607
製造零件編號RLS4K5E
BrandOhmite
HK$781.54
單位
4.5kΩ ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
RS庫存編號 892-2422
製造零件編號RRS250E
BrandOhmite
HK$2,896.27
單位
250Ω ±10% 500W 325 ° Panel Mount 9.53 mm - Solder Lug 203.2 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft
RS庫存編號 893-4718
製造零件編號RNS15RE
BrandOhmite
HK$1,918.89
單位
15Ω ±10% 300W 320 ° Panel Mount 9.53 mm - Solder Lug 152.4 (Dia.) x 60.33mm - - 60.33mm - Linear Shaft
RS庫存編號 168-0118
製造零件編號RT025AS15R0KB
BrandVishay
HK$772.311
/個 (每包:25個)
單位
15Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 144-5535
製造零件編號RJS50RE
HK$549.06
單位
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庫存編號 891-5613
製造零件編號RLS7R5E
BrandOhmite
HK$1,180.67
/個 (每包:5個)
單位
7.5Ω ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft
RS庫存編號 891-5442
製造零件編號RHS750E
HK$329.22
單位
750Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS庫存編號 788-7680
製造零件編號RT100AS1001KB
BrandVishay
HK$2,401.53
單位
1kΩ ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 (Dia.) x 81mm - - 81mm +320°C -
RS庫存編號 891-5348
製造零件編號RES350E
HK$271.324
/個 (每包:5個)
單位
350Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS庫存編號 892-8638
製造零件編號6533E
BrandOhmite
HK$465.29
單位
- - - - Coupling Clip - - - - - - - - Linear Shaft
RS庫存編號 891-5402
製造零件編號RHS25RE
HK$272.98
單位
25Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft
RS庫存編號 891-5363
製造零件編號RES75RE
HK$246.56
單位
75Ω ±10% 12.5W 300 ° Panel Mount 3.18 mm - Solder Lug 22.23 (Dia.) x 17.46mm - - 17.46mm - Linear Shaft
RS庫存編號 893-5200
製造零件編號RPS150E
BrandOhmite
HK$1,862.278
/個 (每包:5個)
單位
150Ω ±10% 225W 310 ° Panel Mount 9.53 mm - Solder Lug 127 (Dia.) x 53.98mm - - 53.98mm - Linear Shaft