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Series R potentiometers feature carbon composition elements and a compact size for applications requiring
high reliability in extreme environments.

Series R Specs
Precision Series R 

Features

• hot molded carbon element
• all metal shaft and housing
• sealed shaft and housing
• quality meeting or exceeding MIL-R-94

Electrical Specifications

• Resistance range, linear taper: 100  to 5 Meg 
• Resistance range, logarithmic taper: 150  to 1 Meg 
• Resistance tolerance: ±10% or ±20%
• Resistance taper: linear, logarithmic, reverse logarithmic; other tapers by special order
• Power rating: 0.75 watts at 70°C derated to 0 watts at 120°C
• Insulation resistance:
• dry: 10K Meg 
• wet: 100K Meg 
• Dielectric strength: 900 V RMS at sea level
• Operating voltage: 500 V, subject to power rating

Mechanical Specifications

• Mechanical rotation: 300°
• Operating torque: 1 oz/in to 6 oz/in
• Rotational life: 25,000 cycles

Environmental Specifications

• Operating temperature: -65°C to +125°C
• Resistance to soldering heat: 350°C for 5 seconds
• Humidity range: per MIL-R-94
• Vibration range: per MIL-R-94
• Shock resistance: per MIL-R-94
• Load life: 1000 hours at 70°C

Ordering Information - Series R

Example: RW4U1031S28

  Series:


R = series R

  Bushing:


​W = panel &
shaft seal

   Bushing        length

4 = 1/4"
blank = 3/8"

​

      Taper:


​U = linear
A = logarithmic
B = reverse logarithmic

Resistance value:


Total resistance
value in : first two digits significant,
third digit =
number of zeroes

Tolerance:


1 = 10% of nominal
2 = 20% of nominal

 Shaft     style:

R = round
S = slotted
F = flatted

   Shaft         length:

16 = 1/2"
20 = 5/8"
24 = 3/4"
28 = 7/8"