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 168-0127
製造零件編號RT025AS4700KB
BrandVishay
HK$624.49
/個 (每包:25個)
單位
470Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 788-7832
製造零件編號RT025AS4700KB
BrandVishay
HK$655.89
單位
470Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 827-6400
製造零件編號VRH320 10R K
BrandArcol
HK$2,283.90
單位
10Ω - - - Surface Mount - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS庫存編號 891-5411
製造零件編號RHS2K5E
HK$418.09
單位
2.5kΩ ±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 827-6404
製造零件編號VRH320 10K K
BrandArcol
HK$1,684.22
單位
10kΩ ±10% - - Surface Mount - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS庫存編號 167-8618
製造零件編號RT025AS2201KB
BrandVishay
HK$696.45
/個 (每包:25個)
單位
2.2kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 Dia.x 50mm 50mm - 38 (Dia.)mm +320°C -
RS庫存編號 167-9886
製造零件編號RT055AS1002KB
BrandVishay
HK$1,450.114
/個 (每包:25個)
單位
10kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS庫存編號 788-7693
製造零件編號RT055AS1002KB
BrandVishay
HK$1,026.00
單位
10kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS庫存編號 891-5503
製造零件編號RJS50KE
BrandOhmite
HK$510.48
單位
50kΩ ±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 891-5486
製造零件編號RJS2K5E
BrandOhmite
HK$368.03
單位
2.5kΩ ±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 827-6397
製造零件編號VRH320 33R K
BrandArcol
HK$1,562.02
單位
33Ω - - - Surface Mount - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS庫存編號 167-9889
製造零件編號RT055AS4701KB
BrandVishay
HK$1,450.114
/個 (每包:25個)
單位
4.7kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS庫存編號 795-4847
製造零件編號RT025AS2201KB
BrandVishay
HK$653.62
單位
2.2kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 Dia.x 50mm 50mm - 38 (Dia.)mm +320°C -
RS庫存編號 788-7712
製造零件編號RT055AS4701KB
BrandVishay
HK$1,592.44
單位
4.7kΩ ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS庫存編號 827-6407
製造零件編號VRH320 1K K
BrandArcol
HK$1,398.83
單位
1kΩ ±10% - - Surface Mount - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS庫存編號 168-0124
製造零件編號RT025AS4701KB
BrandVishay
HK$624.49
/個 (每包:25個)
單位
4.7kΩ ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 167-9891
製造零件編號RT055AS10R0KB
BrandVishay
HK$1,470.575
/個 (每包:25個)
單位
10Ω ±10% 55W 1 Panel Mount 6 mm 10.5mm Solder Lug 60 (Dia.) x 64mm - - 64mm +320°C -
RS庫存編號 893-5459
製造零件編號RNS75R
BrandOhmite
HK$2,091.464
/個 (每包:5個)
單位
75Ω ±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 892-2456
製造零件編號RUS1R0E
BrandOhmite
HK$7,890.44
單位
±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 891-5408
製造零件編號RHS25KE
HK$393.07
單位
25kΩ ±10% 25W 300 ° Panel Mount 6.35 mm - Solder Lug 39.62 (Dia.) x 34.93mm - - 34.93mm - Linear Shaft