Vishay 25W Wirewound Rheostat, 47Ω, ±10%

  • RS Stock No. 788-7835
  • Mfr. Part No. RT025AS47R0KB
  • Brand Vishay
Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
Product Details

RT Series Wirewound Rheostats - 12 W and 500 W

The Vishay RT Series of linear wire wound rheostats are designed for use in professional and industrial equipment. Particularly in equipment where transients, repeated overloads, impacts and vibrations characterise everyday operation.Suggested accessories for these rheostats include control buttons and displays.

Features & Benefits

Vitreous enamel construction provides exceptional reliability
Linear wire wound track
Compact size per dissipation rating
Wide operating temperature range
Designed for heavy-duty applications such as repeated overloads, transients and conditions where shock and vibrations occur
Rheostats supplied with mounting hardware
1000 Vrms dielectric strength for 25 W models
±10% tolerance

Power Face Dia. (A) Overall Length (C + D) Shaft Dia. (F) Shaft Length (E) Mtg. Bush Dia. Mtg. Bush Length Weight
25W 38 50 6 12* 10 9 80g
55W 60 64 6 15* 10 9 175g
100W 85 81 6 18* 10 9 400g
250W 143 125 10 50 - - 1300g
500W 143 158 10 50 - - 1900g
* Shaft length excludes mounting bush.
Resistance Tolerance ±10%
Insulation Resistance 1000MΩ at 500Vdc
Dielectric Strength  
25W,55W 1000Vrms
100W 1500Vrms
250W 2000Vrms
500W 3500Vrms
Mechanical Rotation 300° ±5°
Running Torque  
25W 1 → 10Ncm
55W 2 → 15Ncm
100W 4 → 20Ncm
250W, 500W 10 → 50Ncm
Operating Temperature -55°C → +320°C

Note

Mounting surface must be earthed.

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The RT025AS47R0KB rheostat from Vishay features a standard 6 mm diameter shaft and has a maximum resistance of 47 Ω. This rheostat provides a maximum service voltage of 34.3 V and 730 mA maximum current through the wiper.

Specifications
Attribute Value
Maximum Resistance 47Ω
Tolerance ±10%
Power Rating 25W
Number of Turns 1
Mounting Type Panel Mount
Shaft Diameter 6 mm
Mounting Hole Diameter 10.5mm
Termination Style Solder Lug
Dimensions 38 (Dia.) x 50mm
Length 50mm
Maximum Operating Temperature +320°C
Minimum Operating Temperature -55°C
75 In stock for FREE next working day delivery
Price Each
£ 71.28
(exc. VAT)
£ 85.54
(inc. VAT)
Units
Per unit
1 - 4
£71.28
5 - 14
£54.13
15 - 24
£47.89
25 - 49
£41.64
50 +
£40.81
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