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 788-7804
製造零件編號RT025AS10R0KB
BrandVishay
HK$510.00
單位
10Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 167-9888
製造零件編號RT055AS1000KB
BrandVishay
HK$1,289.94
/個 (每包:25個)
單位
100Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS庫存編號 891-5587
製造零件編號RLS150E
BrandOhmite
HK$780.84
單位
150Ω ±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 788-7700
製造零件編號RT055AS2201KB
BrandVishay
HK$1,451.16
單位
2.2kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS庫存編號 167-9885
製造零件編號RT055AS3300KB
BrandVishay
HK$1,289.94
/個 (每包:25個)
單位
330Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS庫存編號 144-5534
製造零件編號RJS500E
HK$549.06
單位
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庫存編號 891-5537
製造零件編號RKS100E
BrandOhmite
HK$549.42
單位
100Ω ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS庫存編號 893-5272
製造零件編號RRS3R0
BrandOhmite
HK$3,266.828
/個 (每包:5個)
單位
±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 144-5540
製造零件編號RLS15RE
HK$1,059.50
單位
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庫存編號 892-2444
製造零件編號RRS8R0E
BrandOhmite
HK$2,766.32
單位
±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 167-8663
製造零件編號RT055AS1001KB
BrandVishay
HK$1,289.94
/個 (每包:25個)
單位
1kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm 64mm - 60 (Dia.)mm +320°C -
RS庫存編號 891-5556
製造零件編號RKS25RE
BrandOhmite
HK$533.80
單位
25Ω ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS庫存編號 892-8221
製造零件編號RKS750E
BrandOhmite
HK$582.70
單位
750Ω ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS庫存編號 788-7677
製造零件編號RT500AS1001KB
BrandVishay
HK$8,848.50
單位
1kΩ ±10% 500W 1 Panel Mount 10 mm 12mm Solder Lug 143 (Dia.) x 158mm - - 158mm +320°C -
RS庫存編號 891-5376
製造零件編號RHS100E
HK$431.50
單位
100Ω ±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 891-5480
製造零件編號RJS2R0E
BrandOhmite
HK$448.86
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 892-8394
製造零件編號RNS2K5E
BrandOhmite
HK$2,088.09
單位
2.5Ω ±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 893-3472
製造零件編號RNS5R0E
BrandOhmite
HK$1,840.73
單位
±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 893-4709
製造零件編號RKS75RE
BrandOhmite
HK$678.744
/個 (每包:5個)
單位
75Ω ±10% 100W 300 ° Panel Mount 6.35 mm - Solder Lug 79.38 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS庫存編號 144-5525
製造零件編號RHS10RE
HK$544.96
單位
10Ω 10% 25W 300 ° Panel Mount 6.35 mm - Solder 39.62 (Dia.) x 34.93mm 39.62 (Dia.)mm - 34.93mm - Linear Shaft