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Looking for high quality American-made wire-wound potentiometers? The Clarostat series 43 meets MIL-R-19 standards. These 2 Watt wire-wound controls are made to the military specs RA20 series. These potentiometers run in ohmages from 1 ohm to 50K ohms. Taper is linear except when otherwise specifically noted. These wire-wound controls come in bushing both locking and non-locking. The typical locking shaft has 1/2 locking bushing with a 1/8 inch slotted shaft. You can get a 3/8 inch shaft beyond the locking bushing by using the number RA20LASD plus the ohmage code. The commercial 2 Watt locking series is designated by 43C2 or the military version RA20LASB. These two parts are 1/2 locking bushing and 1/8 shaft. When looking for a 2 Watt non-locking wire-wound potentiometer, you will look for Clarostat series 43C1 or 43C3 and MIL-R-19 RA20NASD series. The 43C3 or RA20NASD is a 3/8 inch bushing with a 1/2 inch shaft. The 43C1 series contains a 1 5/8 inch shaft, which can be cut down in size. These series are able to handle any 1/4 inch diameter knob.
American-made industrial wire-wound controls requiring 4 Watt power can be found by using the 58C series or the military RA30 series. The wire-wound controls come in linear taper. The ohmages run from 1ohm – 75Kohm in 10% tolerance. When looking for a locking shaft, please use designation RA30LASB or 58C2. If requiring a shaft longer than 1/8, please designate by using RA30LASD. When looking for a non-locking shaft, please use RA30NASD 1/2 inch shaft or 58C3. RA30NASA for 1/8 inch shaft 58C1 for 1 5/8 inch shaft (able to be cut down).
Click here to download RA20-Series potentiometers spec sheet.
Click here to download RA30-Series potentiometers spec sheet.
Click here to download 43C-Series potentiometers spec sheet.
Click here to download 58C-Series potentiometers spec sheet.
Series Name | Manufacturer | Wattage | Shaft | Bushing | Picture | |
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RA20LASB series | Clarostat | 2 Watt | 5/8 in. screwdriver slotted | Locking 1/2 x 3/8 in. | RA20LASB |
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RA20LASD series | Clarostat | 2 Watt | 7/8 in. screwdriver slotted | Locking 1/2 x 3/8 in. | RA20LASD |
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RA20NASA series | Clarostat | 2 Watt | 1/2 in. screwdriver slotted | Standard 3/8 x 3/8 in. | RA20NASA |
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RA20NASD series | Clarostat | 2 Watt | 7/8 in. screwdriver slotted | Standard 3/8 x 3/8 in. | RA20NASD |
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RA20NASK series | Clarostat | 2 Watt | 2 1/2 in. screwdriver slotted | Standard 3/8 x 3/8 in. | RA20NASK |
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RA30LASB series | Clarostat | 4 Watt | 5/8 in. screwdriver slotted | Locking 1/2 x 3/8 in. | RA30LASB |
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RA30LASD series | Clarostat | 4 Watt | 7/8 in. screwdriver slotted | Locking 1/2 x 3/8 in. | RA30LASD |
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RA30NASA series | Clarostat | 4 Watt | 1/2 in. screwdriver slotted | Standard 3/8 x 3/8 in. | RA30NASA |
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RA30NASD series | Clarostat | 4 Watt | 7/8 in. screwdriver slotted | Standard 3/8 x 3/8 in. | RA30NASA |
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43C1 series | Clarostat | 2 Watt | 2 in. round. | Standard 3/8 x 3/8 in. | 43C1 |
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43C2 series | Clarostat | 2 Watt | 5/8 in. screwdriver slotted | Locking 1/2 x 3/8 in. | 43C2 |
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43C3 series | Clarostat | 2 Watt | 1/2 in. screwdriver slotted | Standard 3/8 x 3/8 in. | 43C3 |
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58C1 series | Clarostat | 4 Watt | 2 in. round. | Standard 3/8 x 3/8 in. | 58C1 |
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58C2 series | Clarostat | 4 Watt | 5/8 in. screwdriver slotted | Locking 1/2 x 3/8 in. | 58C2 |
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58C3 series | Clarostat | 4 Watt | 1/2 in. screwdriver slotted | Standard 3/8 x 3/8 in. | 58C3 |
RA20 and RA30 Series Part Number Breakdown Example: | |||||||
RA20NASD103A | |||||||
RA20 | N | A | S | D | 10 | 3 | A |
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Series | Bushing | Switch | Shaft Style | Shaft Length | Resistance First Two Digits | Resistance Number of Zeros | Linearity |
Series Name:
Bushing:
Switch:
Shaft Style:
Shaft Length:
* Not available in "L" locking bushing
^ Not available in "N" standard bushing
Linearity:
43C and 58C Series Part Number Breakdown Example: | |
58C1-40K | |
58C1 | 40K |
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Series | Resistance Value |