800T-U55 ALLEN-BRADLEY Potentiometer Unit Megohm

Review ALLEN-BRADLEY Potentiometer Unit 0.5 Megohm 300vac Series

The Allen-Bradley 800T-U55 Potentiometer Unit is a versatile and high-performing electrical component designed for various industrial automation applications. This potentiometer, specifically, offers a resistance value of 0.5 megohms and can handle a maximum voltage of 300 volts AC.

The 800T-U55 is built using robust and reliable technologies to ensure optimal performance under harsh operating conditions. Its linear taper design allows for precise and smooth resistance adjustments, making it an ideal choice for applications that require fine control over electrical signals. The unit is housed in a rugged, die-cast aluminum enclosure that provides excellent protection against environmental hazards such as dust, moisture, and vibration.

This potentiometer features a high-quality, carbon composition resistance element that ensures stable and accurate resistance values over an extended period. The 800T-U55 also comes with a rotary shaft and knob, allowing for convenient and intuitive adjustments. The knob is securely fastened to the shaft with a setscrew, ensuring that adjustments remain stable and do not get dislodged during operation.

The Allen-Bradley 800T-U55 Potentiometer Unit is designed to meet the rigorous requirements of industrial applications. It is RoHS compliant and conforms to UL 508-1 and CSA C22.2 No. 14 standards. This potentiometer is also suitable for use in Siemens S7-1200 and Siemens S7-1500 PLC systems, making it a popular choice among automation professionals.

In summary, the Allen-Bradley 800T-U55 Potentiometer Unit is a durable and precise electrical component that offers excellent performance and versatility for various industrial automation applications. Its 0.5 megohm resistance value and 300 volts AC maximum voltage rating make it suitable for use in a wide range of applications that require precise control over electrical signals. The unit's rugged construction, stable resistance values, and ease of use make it a reliable and cost-effective solution for industrial automation challenges.

The Allen-Bradley 800T-U55 potentiometer unit with a 0.5 megohm resistance and a maximum voltage rating of 300VAC is a popular choice in industrial automation applications due to its reliability and accurate resistance measurement. However, like any other electrical component, it has its pros and cons.

1. High Precision: This potentiometer offers a high degree of precision, making it suitable for applications that require accurate resistance measurement.

2. Robust Design: The Allen-Bradley 800T-U55 potentiometer is known for its rugged design, which makes it suitable for use in harsh industrial environments.

3. Wide Voltage Range: With a maximum voltage rating of 300VAC, this potentiometer can be used in a wide range of applications, making it a versatile choice.

4. Easy Installation: The unit is designed to be easy to install, which can save time and reduce installation costs.

1. High Cost: Compared to other potentiometer units with similar specifications, the Allen-Bradley 800T-U55 can be quite expensive.

2. Limited Resistance Range: While the 0.5 megohm resistance is suitable for many applications, it may not be sufficient for others that require higher or lower resistance values.

3. Requires Calibration: Like all potentiometers, the Allen-Bradley 800T-U55 requires regular calibration to ensure accurate resistance measurement.

In conclusion, the Allen-Bradley 800T-U55 potentiometer unit with a 0.5 megohm resistance and a maximum voltage rating of 300VAC is a reliable and accurate component suitable for use in harsh industrial environments. However, its high cost, limited resistance range, and requirement for regular calibration may be drawbacks for some applications.

Based on the information provided, I would recommend considering this potentiometer unit for applications where high precision, robust design, and a wide voltage range are essential, and the cost is not a major concern. For applications with different resistance requirements or budget constraints, other potentiometer units with different specifications may be more suitable.

Details:

Type: potentiometer unit / pilot control. Also marked for use as series resistor. Panel-mount potentiometer unit from Allen-bradley bulletin 800t. New old stock.

Includes mounting hardware shown and instruction sheet. Brand: Allen-bradley. Allen-bradley 800T-U55 potentiometer unit, 0.5 megohm, series PO. Catalog number: 800T-U55.

Please review all photos carefully for exact cosmetic condition and included contents. Includes the original box and instruction sheet as shown in pictures. Panel-mount industrial control component. Resistance: 0.5 megohm.

Labeled for potentiometer applications.

specifications passivecompos:

• brand: Allen-bradley
• mpn: 800t-u55
• part type: Unit
• material: Plastic And Metal

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

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• sold #: 8
• started: june 6, 2026
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• prices: $189.99–$224.99
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