RNS400 OHMITE Rheostat Potentiometer

Review OHMITE New Rheostat Potentiometer

The Ohmite RNS400 is a high-quality rheostat potentiometer designed for various applications where precise voltage control is required. This versatile component is ideal for use in laboratories, educational settings, and industrial automation projects.

The RNS400 is a linear, wiper-type potentiometer with a resistive element that offers a continuous resistance value range from 10 ohms to 400 ohms. The potentiometer features a carbon composition resistance element that provides excellent stability and reliability over a wide temperature range, from -30 C to 85 C.

The body of the RNS400 is made of thermoplastic material, which ensures a long life and resistance to environmental conditions. The potentiometer has a rotary knob with a knurled surface to provide a firm grip and ease of adjustment. The knob is also color-coded, with red indicating the wiper position, making it easy to identify.

The RNS400 has a 1/4-20 UNC threaded mounting hole that allows for easy installation and secure attachment to various surfaces. The potentiometer also features a sealed construction, which protects the internal components from dust, moisture, and other contaminants, ensuring optimal performance even in harsh environments.

The Ohmite RNS400 rheostat potentiometer comes with lead wires that are pre-attached to the terminals. The wires are insulated with high-quality PVC material to ensure proper insulation and to prevent shorts. The potentiometer has a maximum power rating of 1 watt, making it suitable for low to medium power applications.

The RNS400 is RoHS compliant and comes with a 1-year warranty from the manufacturer. It is an essential component for any electronics project or laboratory setup where precise voltage control is required, and its rugged design ensures long-lasting performance.

The Ohmite RNS400 rheostat potentiometer is a variable resistance device commonly used for voltage or current control in various electrical applications. Here are the pros and cons of buying this component:

1. Wide Range: The RNS400 offers a resistance range from 2.5 ohms to 4000 ohms, making it suitable for a broad range of voltage and current control applications.

2. Rugged Construction: Ohmite is known for manufacturing high-quality components, and the RNS400 is no exception. It has a durable housing and a long-lasting carbon composition resistive element.

3. Temperature Stability: This potentiometer offers good temperature stability, ensuring consistent resistance values under various operating temperatures.

4. Versatile Applications: The RNS400 can be used in various applications, such as motor speed control, voltage regulators, and current limiting circuits.

1. Limited Power Rating: The maximum power rating for the RNS400 is 5 watts, which might not be suitable for high-power applications.

2. Size: The RNS400 has a relatively large size, which could be a disadvantage for applications where space is limited.

3. Manual Control: Since it is a potentiometer, the resistance value is manually adjusted, which might not be ideal for applications requiring precise and automatic control.

In conclusion, the Ohmite RNS400 rheostat potentiometer is a versatile and rugged component suitable for various voltage and current control applications. Its wide resistance range, good temperature stability, and durable construction make it an excellent choice for many electrical projects. However, its limited power rating, relatively large size, and manual control might not make it the best option for high-power applications or those requiring precise and automatic control.

If you're looking for a rugged and versatile potentiometer for voltage or current control applications with a wide resistance range and good temperature stability, the Ohmite RNS400 is an excellent choice. However, if you require a higher power rating or automatic control, you might want to consider other types of variable resistors or controllers.

Details:

New Ohmite RNS400 rheostat potentiometer, 5 / J's.

specifications passivecompos:

• brand: Ohmite
• mpn: Rns400
• series: Ohmite Rns400
• type: Rheostat Potentiometer
• country of origin: United States

seller passivecompos:

• city: yale, michigan
• rating: 100.0%
• # reviews: 26532

shipping passivecompos:

• type: calculated
• carrier: ups
• transit: 2-4 days
• class: standard, one-day
• service: ups ground, ups next day air

returns passivecompos:

• paid by: seller
• method: money back
• time: 60 days
• policy: returns accepted

payments passivecompos:

• wallet: paypal
• credit card: discover
• other

general passivecompos:

• category: Business & Industrial > Passive Components > Variable Resistors > Potentiometers

offer passivecompos:

• sold #: 8
• options: ship-to-home
• availability: in stock
• in stock #: 5
• prices: $45.00–$770.47
• item condition:
  • New – Open box
  • New
  • Used
• started: february 17, 2026