277-4866-ND DIGIKEY Relay Spdt

Review DIGIKEY Relay Gen Purpose Spdt 50ma 120v

The Digi-Key part number 277-4866-ND is a Single-Pole Double-Throw (SPDT) relay with a operating voltage of 120V. This relay is designed to handle a contact current of up to 50mA and is suitable for use in various automation, control, and signaling applications.

The SPDT relay consists of a single common contact and two normally open contacts. When the coil is energized, one of the normally open contacts closes, making a connection between the common contact and the selected NO contact. This allows for the switching of low current circuits.

The relay is compact in size, measuring 1.52 inches by 1.19 inches by 0.59 inches (38.6mm x 30.2mm x 15.0mm), making it an ideal choice for space-constrained designs. It also comes with a plastic housing that provides protection against moisture and other environmental hazards.

The SPDT relay features a coil resistance of 350 ohms and a contact rating of 10,000 cycles at 100% duty cycle. It also comes with a built-in quiet coil, which reduces audible noise during operation, making it well-suited for use in applications where silence is crucial.

The relay comes with two terminals for the coil and three terminals for the contacts, making wiring easy and straightforward. It is also RoHS compliant, meaning it contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE) in the final product.

The Digi-Key part number 277-4866-ND is a reliable and versatile component for switching low current circuits in a variety of applications. Its compact size, quiet operation, and robust construction make it a popular choice among engineers and designers.

The Digikey part number 277-4866-ND refers to a Single-Pole Double-Throw (SPDT) relay with a contact rating of 50 milliamperes (mA) and a coil voltage of 120 volts. Here are some potential pros and cons of buying this relay:

1. Suitable for low current applications: With a contact rating of 50mA, this relay is ideal for applications where the current flow is low.

2. Voltage compatibility: The 120V coil voltage makes it compatible with standard household voltage, making it a versatile option for various applications.

3. High reliability: Relays are known for their reliability in switching high voltages and currents.

4. Easy to use: SPDT relays are easy to use and can be implemented in various control systems.

1. Limited current capacity: A 50mA contact rating limits the current capacity of this relay, making it unsuitable for applications requiring higher currents.

2. Coil voltage may be too high for some applications: While 120V is a standard household voltage, it may be too high for some applications that require lower coil voltages.

3. Bulkier than solid-state switches: Relays are more significant in size compared to solid-state switches, which may be a disadvantage for space-constrained applications.

In conclusion, the Digikey 277-4866-ND relay is a reliable and versatile option for low current applications that require switching at 120V. However, it may not be suitable for applications with higher current requirements or where size is a concern.

If you require a relay with a higher contact rating or lower coil voltage, you may consider exploring other options with different contact ratings and coil voltages. Alternatively, if space is a concern, you may want to consider using solid-state switches instead of relays.

Details:

Digikey 277-4866-ND: relay gen purpose spdt 50ma 120v.

specifications genpurrelays:

• brand: Digikey
• mpn: 277-4866-nd
• type: Relay Gen Purpose Spdt
• unit type: Unit
• color: Gray

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

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• in stock #: 1
• price: $21.31
• item condition: New – Open box
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• started: november 14, 2025
• availability: in stock

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