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 891-5464
製造零件編號RJS150E
BrandOhmite
HK$407.87
單位
150Ω ±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 891-5534
製造零件編號RJSR50E
BrandOhmite
HK$537.86
單位
500mΩ ±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 893-5266
製造零件編號RNS800E
BrandOhmite
HK$5,088.25
單位
800Ω ±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 891-5559
製造零件編號RKS2R0E
BrandOhmite
HK$670.83
單位
±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 167-9893
製造零件編號RT100AS1002KB
BrandVishay
HK$2,489.442
/個 (每包:25個)
單位
10kΩ ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 (Dia.) x 81mm - - 81mm +320°C -
RS庫存編號 892-2440
製造零件編號RRS5R0E
BrandOhmite
HK$2,662.02
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 788-7817
製造零件編號RT025AS2200KB
BrandVishay
HK$500.00
單位
220Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 891-5449
製造零件編號RHS6R0E
BrandOhmite
HK$344.50
單位
±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 892-2507
製造零件編號18E-100
BrandOhmite
HK$8.042
/個 (每包:50個)
單位
- - 175 W, 225 W - - - - - - - - - - -
RS庫存編號 892-8085
製造零件編號RUS100E
BrandOhmite
HK$7,147.71
單位
100Ω ±10% 1kW 335 ° Panel Mount 9.53 mm - Solder Lug 304.8 (Dia.) x 76.2mm - - 76.2mm - 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 891-5483
製造零件編號RJS22RE
BrandOhmite
HK$339.68
單位
22Ω ±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 168-0123
製造零件編號RT025AS2200KB
BrandVishay
HK$810.25
/個 (每包:25個)
單位
220Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 892-6698
製造零件編號RES125E
BrandOhmite
HK$295.77
單位
125Ω ±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 891-5578
製造零件編號RKS7R5E
BrandOhmite
HK$582.70
單位
7.5Ω ±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 892-2438
製造零件編號RRS500E
BrandOhmite
HK$3,137.84
單位
500Ω ±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 788-7813
製造零件編號RT025AS1501KB
BrandVishay
HK$503.50
單位
1.5kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 893-4715
製造零件編號RLSR50E
BrandOhmite
HK$951.97
單位
500mΩ ±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 891-5335
製造零件編號RES25RE
HK$246.56
單位
25Ω ±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 893-5724
製造零件編號RHL500
BrandOhmite
HK$440.36
/個 (每包:5個)
單位
500Ω ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft