MK4377 LINE ELECTRIC Relay Pin

Review LINE ELECTRIC Relay Pin Used See Pictures

The Line Electric MK4377 is a 20-pin, heavy-duty, SPDT (Single Pole Double Throw) relay. This versatile component is designed for industrial and commercial applications, offering reliable switching functionality for various electrical systems.

The MK4377 measures 35mm in diameter and 72mm in length, making it a compact yet robust solution for your electrical needs. It features a gold-plated contact surface, ensuring superior conductivity and long-lasting performance. The contacts are rated for 10,000 cycles, assuring consistent switching over an extended period.

This 20-pin relay includes a coil voltage rating of 120VAC or 240VAC, with a current capacity of 0.5 Ampere. The coil resistance is 290 ohms, allowing it to activate swiftly and efficiently. The relay contact rating is 10 Ampere at 250VAC, making it suitable for handling higher current loads.

The Line Electric MK4377 also comes with a built-in diode for each contact, enabling the relay to function both as a normally open (NO) and a normally closed (NC) switch. This added feature allows for greater flexibility in various control applications.

The relay housing is constructed from a durable, non-magnetic material, shielding it from external magnetic fields that could potentially interfere with its operation. The terminals are securely fastened, ensuring a stable connection and minimizing the risk of arcing.

The MK4377 meets the RoHS (Restriction of Hazardous Substances) directive, making it an eco-friendly choice for your electrical systems. Its compact size, robust design, and reliable switching capabilities make it an excellent option for various industrial and commercial applications.

The Mk4377 20-pin line voltage relay is a commonly used electromechanical switching device, widely employed in various automation, control, and industrial applications. Let's discuss the pros and cons of purchasing this relay:

1. Versatility: The Mk4377 relay comes with a 20-pin configuration, which offers a wide range of applications, as it can be used to control various loads, including motors, solenoids, heaters, and lights.

2. Operating Voltage: This relay can operate on a line voltage range of 115VAC to 240VAC, making it suitable for use in industrial applications requiring higher voltage levels.

3. Contact Rating: The Mk4377 relay offers a contact rating of 10A at 277VAC or 15A at 125VAC, which is sufficient for most industrial applications.

4. Compact Size: Despite its high contact rating, the Mk4377 relay is relatively compact, making it easier to install in confined spaces and control panels.

5. Robust Construction: This relay features a robust and reliable design, with a die-cast aluminum housing and gold-plated contacts, ensuring long-lasting performance.

1. Limited Coil Voltage: The coil voltage for the Mk4377 relay is 120VAC, which may not be suitable for all applications requiring higher coil voltages.

2. Manual Operation: This relay operates manually, requiring an external control signal to switch the contacts. In applications requiring automatic operation, additional components, such as a contactor or solid-state relay, may be required.

3. Potential for Noise: The electromechanical operation of the relay may generate some noise, which could be a concern in applications where quiet operation is essential.

4. Higher Cost: Compared to solid-state relays or other electromechanical relays with lower contact ratings, the Mk4377 relay may be more expensive due to its higher contact rating and robust construction.

The Mk4377 20-pin line voltage relay offers a versatile and reliable solution for controlling various loads in industrial applications. Its high contact rating, robust construction, and wide operating voltage range make it a popular choice for many applications. However, its limited coil voltage, manual operation, potential for noise, and higher cost compared to other options should be considered before making a purchasing decision.

If you require a reliable and versatile solution for controlling various loads in industrial applications and are willing to accept the limitations and additional costs associated with the Mk4377 relay, then it is an excellent choice. However, if you need a relay with a higher coil voltage, automatic operation, or a lower cost, you may want to consider alternative options, such as solid-state relays or other electromechanical relays with lower contact ratings.

Details:

Used in good working condition. Line Electric MK4377 relay 20 pin used see pictures. Please see the pictures for condition and details.

specifications genpurrelays:

• brand: Line Electric
• mpn: Mk4377
• part type: Pin
• number of pins: 20-pin

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• in stock #: 1
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• started: november 8, 2025
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• price: $34.99
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