MD30-2000-0U00 WATLOW Mercury Displacement Relay

Review WATLOW Mercury Displacement Relay 50a 480v-ac

The Watlow MD30-2000-0U00 Mercury Displacement Relay is a versatile and reliable electrical switching device designed for heavy-duty applications. This 50A, 480V-AC relay is engineered to deliver superior performance under demanding conditions, making it an ideal choice for various industries, including HVAC, power generation, and process control.

The MD30-2000-0U00 Mercury Displacement Relay is a vacuum contactor that utilizes a mercury switch. Mercury displacement relays operate by using the action of mercury to make and break electrical contacts. This design offers several advantages, such as high contact capacity, long contact life, and excellent reliability.

The vacuum contactor housing is made of die-cast aluminum, which provides excellent heat dissipation capabilities. The contactor's contacts are silver-plated copper, ensuring low contact resistance and excellent conductivity. Moreover, the relay features an internal overload protection fuse with a rated current of 50A and a melting point of 250 C (482 F).

The MD30-2000-0U00 Mercury Displacement Relay is designed to operate in temperatures ranging from -20 C to 60 C (0 F to 140 F). It comes with a 10-foot, 12 AWG, 3-conductor power cable. The relay is also equipped with a pilot lamp, which indicates the contacts are closed, providing a visual confirmation of the relay's operation.

The Watlow MD30-2000-0U00 Mercury Displacement Relay is easy to install and includes a mounting plate for 2" x 4" mounting applications. It also comes with a factory-installed overvoltage protection coil and a thermal overload protective device.

In summary, the Watlow MD30-2000-0U00 Mercury Displacement Relay is a robust and dependable electrical switching device that delivers superior performance in heavy-duty applications. Its mercury switch design offers long contact life, high contact capacity, and excellent reliability. The die-cast aluminum housing, silver-plated copper contacts, and internal overload protection make it a reliable and efficient choice for various industries.

Pros and Cons of Buying Watlow MD30-2000-0U00 Mercury Displacement Relay (50A, 480V-AC)

- Pro: Mercury relays, including the MD30-2000-0U00 model, are known for their high reliability due to the mercury switch contact design. (1)

- Con: Mercury switches contain hazardous mercury, which may pose environmental hazards during disposal and could potentially leak during operation, requiring a controlled environment and regular maintenance. (2)

- Pro: This relay can handle high currents up to 50A and voltages up to 480V-AC, making it suitable for heavy-duty industrial applications. (3)

- Con: Its high power handling capacity means that it consumes more energy compared to solid-state relays or other low-power alternatives.

- Pro: Mercury relays are robust and can withstand harsh environments, extreme temperatures, and vibrations. (4)

- Con: Due to their size and weight, mercury relays are less compact and may require more space in control panels or electrical cabinets.

- Pro: Mercury relays have few moving parts, which reduces the likelihood of wear and tear and makes them easier to maintain. (5)

- Con: If the relay fails, it may require specialized repair services due to the hazardous nature of mercury.

- Pro: Though initially more expensive than solid-state relays, mercury relays offer excellent value due to their longevity and reliability. (6)

- Con: The cost of disposing of mercury relays and the potential need for specialized repair services can increase the overall cost of ownership.

The Watlow MD30-2000-0U00 Mercury Displacement Relay (50A, 480V-AC) offers several advantages such as high reliability, durability, and robustness. However, it comes with some drawbacks like the potential environmental hazards due to mercury, increased energy consumption, and the need for specialized repair services.

If the application requires a reliable, heavy-duty, and long-lasting switching solution, and there is no concern about mercury disposal, then the Watlow MD30-2000-0U00 Mercury Displacement Relay could be an excellent choice.

For applications that do not involve mercury handling and require high reliability and robustness, the Watlow MD30-2000-0U00 Mercury Displacement Relay is a suitable option. Otherwise, consider alternative solid-state relays or contactors that do not involve mercury for environmental and safety reasons.

Details:

Solenoid valves. Circuit breakers. Safety and security. Knife gate valves.

Flow indicators.

specifications genpurrelays:

• brand: Watlow
• mpn: Md30-2000-0u00
• coil voltage: Ac
• reference sku: 1694044
• product condition: Used Excellent

shipping genpurrelays:

• type: fixed
• service: standard, expedited, overnight
• class: standard, expedited, one-day
• transit: 4-4 days

offer genpurrelays:

• availability: in stock
• price: $51.00
• item condition: Used
• in stock #: 1
• sold #: 24
• best offers: true
• options: ship-to-home
• started: june 23, 2025

payments genpurrelays:

• other
• credit card: visa
• wallet: apple-pay

general genpurrelays:

• category: Business & Industrial > Electrical Equipment Supplies > General Purpose Relays

returns genpurrelays:

• paid by: seller
• time: 30 days
• policy: returns accepted
• method: money back

seller genpurrelays:

• rating: 99.9%
• # reviews: 114006
• city: delta, ohio