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 827-6393
製造零件編號VRH320 3K3 K
BrandArcol
HK$1,493.69
單位
3.3kΩ ±10% - - Surface Mount - - Solder Lug 446 x 93 x 150mm 93mm 150mm 446mm - Slide
RS庫存編號 893-5216
製造零件編號RUS75RE
BrandOhmite
HK$7,194.194
/個 (每包:5個)
單位
75Ω ±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 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 168-0126
製造零件編號RT025AS2R20KB
BrandVishay
HK$886.034
/個 (每包:25個)
單位
2.2Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 788-7671
製造零件編號RT100AS1000KB
BrandVishay
HK$1,910.00
單位
100Ω ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 (Dia.) x 81mm - - 81mm +320°C -
RS庫存編號 892-8577
製造零件編號RKS10KE
BrandOhmite
HK$945.69
單位
10kΩ ±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 144-5522
製造零件編號RES50RE
HK$422.81
單位
50Ω 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 167-9895
製造零件編號RT100AS1000KB
BrandVishay
HK$2,250.818
/個 (每包:25個)
單位
100Ω ±10% 100W 1 Panel Mount 6 mm 10.5mm Solder Lug 85 (Dia.) x 81mm - - 81mm +320°C -
RS庫存編號 168-0117
製造零件編號RT025AS1000KB
BrandVishay
HK$663.85
/個 (每包:25個)
單位
100Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +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 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 891-5398
製造零件編號RHS1K0E
HK$305.06
單位
1kΩ ±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 892-2416
製造零件編號RRS125E
BrandOhmite
HK$2,786.88
單位
125Ω ±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 168-0125
製造零件編號RT025AS22R0KB
BrandVishay
HK$595.22
/個 (每包:25個)
單位
22Ω ±10% 25W 1 Panel Mount 6 mm 10.5mm Solder Lug 38 (Dia.) x 50mm - - 50mm +320°C -
RS庫存編號 893-4106
製造零件編號RGS1K0E
BrandOhmite
HK$526.67
單位
1kΩ ±10% 75W 300 ° Panel Mount 6.35 mm - Solder Lug 69.25 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS庫存編號 893-1088
製造零件編號RES200E
BrandOhmite
HK$320.378
/個 (每包:5個)
單位
200Ω ±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 891-5433
製造零件編號RHS500E
HK$257.81
單位
500Ω ±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 891-5395
製造零件編號RHS1R0E
HK$287.09
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 893-5608
製造零件編號RGS100E
BrandOhmite
HK$561.466
/個 (每包:5個)
單位
100Ω ±10% 75W 300 ° Panel Mount 6.35 mm - Solder Lug 69.25 (Dia.) x 44.45mm - - 44.45mm - Linear Shaft
RS庫存編號 893-4702
製造零件編號RLS35RE
BrandOhmite
HK$780.84
單位
35Ω ±10% 150W 300 ° Panel Mount 6.35 mm - Solder Lug 101.6 (Dia.) x 50.8mm - - 50.8mm - Linear Shaft