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 893-5204
製造零件編號RRS175E
BrandOhmite
HK$3,137.84
單位
175Ω ±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 168-0066
製造零件編號RT012AS1000KB
BrandVishay
HK$969.747
/個 (每包:25個)
單位
100Ω ±10% 12W 1 Panel Mount 3 mm 6.5mm Solder Lug 22.5 (Dia.) x 40mm - - 40mm +320°C -
RS庫存編號 892-6663
製造零件編號6532E
BrandOhmite
HK$439.88
單位
- - - - Coupling Clip - - - - - - - - Linear Shaft
RS庫存編號 892-2469
製造零件編號RUS50RE
BrandOhmite
HK$5,755.87
單位
50Ω ±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 891-5571
製造零件編號RLS100E
BrandOhmite
HK$715.54
單位
100Ω ±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 788-7835
製造零件編號RT025AS47R0KB
BrandVishay
HK$578.64
單位
47Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 891-5565
製造零件編號RKS5K0E
BrandOhmite
HK$665.36
單位
5kΩ ±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 893-5298
製造零件編號RKS2K0E
BrandOhmite
HK$831.664
/個 (每包:5個)
單位
2kΩ ±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 892-2510
製造零件編號5E-100
BrandOhmite
HK$3.896
/個 (每包:50個)
單位
- - 8 W, 12 W - - - - - - - - - - -
RS庫存編號 892-8565
製造零件編號RLS5R0E
BrandOhmite
HK$944.73
單位
±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 893-5171
製造零件編號RCS5K0E
BrandOhmite
HK$1,980.652
/個 (每包:5個)
單位
5kΩ ±10% 7.5W 300 ° Panel Mount 3.18 mm - Solder Lug 13.08 (Dia.) x 15.88mm - - 15.88mm - Linear Shaft
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 788-7674
製造零件編號RT100AS1002KB
BrandVishay
HK$1,768.00
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 892-2434
製造零件編號RRS2K5E
BrandOhmite
HK$3,298.512
/個 (每包:5個)
單位
2.5kΩ ±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 144-5521
製造零件編號RES100E
HK$422.81
單位
100Ω 10% 12.5W 300 ° Panel Mount 3.18 mm - Solder 22.23 (Dia.) x 17.46mm 22.23 (Dia.)mm - 17.46mm - Linear Shaft
RS庫存編號 144-5533
製造零件編號RJS1R0E
HK$617.74
單位
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 891-5515
製造零件編號RJS5K0E
BrandOhmite
HK$357.53
單位
5kΩ ±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 891-5414
製造零件編號RHS2R0E
HK$277.76
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 891-5635
製造零件編號RNS25RE
BrandOhmite
HK$1,704.26
單位
25Ω ±10% 300W 320 ° Panel Mount 9.53 mm - Solder Lug 152.4 (Dia.) x 60.33mm - - 60.33mm - Linear Shaft