Rheostats | Linear & Wirewound | RS
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    Rheostats

    A rheostat is a variable resistor which is used to control current or vary resistance within an electrical circuit. They are able to vary the resistance in a circuit without interruption. Rheostats are very similar in construction to potentiometers, but they are designed to work with higher currents. Rheostats are used in motor speed controls, dimmer switches any any applications which require control of the flow of an electric current.

    How do rheostats work?

    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.

    Types of Rheostat

    • 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, or linear 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.

    What is the difference between a potentiometer and a rheostat?

    Both a rheostat and a potentiometer are a type of variable resistor. They feature a similar construction, however, a rheostat features 2 terminals and a potentometer features 3 terminals. A primary difference in functionality is that a rheostat is often implemented to change current, while pots can be used to change the voltage within a circuit.

    82 產品顯示為 Rheostats

    • RS庫存編號 168-0117
    • 製造零件編號 RT025AS1000KB
    个(每托盘 25 )
    HK$1,837.148
    Vishay
    100Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 788-7801
    • 製造零件編號 RT025AS15R0KB
    HK$2,768.71
    Vishay
    15Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 168-0125
    • 製造零件編號 RT025AS22R0KB
    个(每托盘 25 )
    HK$1,844.862
    Vishay
    22Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    23.5 V
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 788-7665
    • 製造零件編號 RT012AS2201KB
    HK$3,087.76
    Vishay
    2.2kΩ
    ±10%
    12W
    1
    Panel Mount
    3 mm
    6.5mm
    Solder Lug
    22.5 x 40mm
    -
    -
    -
    40mm
    -
    +320°C
    • RS庫存編號 168-0127
    • 製造零件編號 RT025AS4700KB
    个(每托盘 25 )
    HK$1,935.462
    Vishay
    470Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 168-0124
    • 製造零件編號 RT025AS4701KB
    个(每托盘 25 )
    HK$1,935.462
    Vishay
    4.7kΩ
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 167-9885
    • 製造零件編號 RT055AS3300KB
    个(每托盘 25 )
    HK$5,519.244
    Vishay
    330Ω
    ±10%
    55W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    60 x 64mm
    -
    -
    -
    64mm
    -
    +320°C
    • RS庫存編號 168-0128
    • 製造零件編號 RT025AS4R70KB
    个(每托盘 25 )
    HK$2,116.57
    Vishay
    4.7Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 168-0126
    • 製造零件編號 RT025AS2R20KB
    个(每托盘 25 )
    HK$2,192.164
    Vishay
    2.2Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 167-9889
    • 製造零件編號 RT055AS4701KB
    个(每托盘 25 )
    HK$5,366.952
    Vishay
    4.7kΩ
    ±10%
    55W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    60 x 64mm
    -
    -
    -
    64mm
    -
    +320°C
    • RS庫存編號 788-7826
    • 製造零件編號 RT025AS22R0KB
    HK$1,877.80
    Vishay
    22Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    23.5 V
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 144-5527
    • 製造零件編號 RHS1K5E
    HK$1,083.70
    Arcol Ohmite
    1.5kΩ
    10%
    25W
    1
    Panel Mount
    6.35 mm
    -
    Solder
    39.62 x 34.93mm
    500 Vrms
    39.62mm
    -
    34.93mm
    0.129A
    -
    • RS庫存編號 788-7804
    • 製造零件編號 RT025AS10R0KB
    HK$2,069.00
    Vishay
    10Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 144-5528
    • 製造零件編號 RHS25RE
    HK$1,067.46
    Arcol Ohmite
    25Ω
    10%
    25W
    1
    Panel Mount
    6.35 mm
    -
    Solder
    39.62 x 34.93mm
    500 Vrms
    39.62mm
    -
    34.93mm
    1A
    -
    • RS庫存編號 168-0119
    • 製造零件編號 RT025AS10R0KB
    个(每托盘 25 )
    HK$1,844.862
    Vishay
    10Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 892-2456
    • 製造零件編號 RUS1R0E
    HK$13,425.00
    Ohmite
    ±10%
    1kW
    1
    Panel Mount
    9.53 mm
    -
    Solder Lug
    304.8 x 76.2mm
    1600 Vrms
    -
    -
    76.2mm
    31.6A
    -
    • RS庫存編號 168-0123
    • 製造零件編號 RT025AS2200KB
    个(每托盘 25 )
    HK$1,935.462
    Vishay
    220Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 788-7835
    • 製造零件編號 RT025AS47R0KB
    HK$2,182.30
    Vishay
    47Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 788-7813
    • 製造零件編號 RT025AS1501KB
    HK$2,469.05
    Vishay
    1.5kΩ
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
    • RS庫存編號 788-7839
    • 製造零件編號 RT025AS4R70KB
    HK$2,476.80
    Vishay
    4.7Ω
    ±10%
    25W
    1
    Panel Mount
    6 mm
    10.5mm
    Solder Lug
    38 x 50mm
    -
    -
    -
    50mm
    -
    +320°C
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