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Black nylon locking connector with brass contacts, twist-lock design, 50A rating

Hubbell Incorporated

Hubbell HBL3764C Locking Connector 50A 250V

SKU CH-8AQH-FP1YV

A 50 A locking connector with three-pole, four-wire design rated for 250 VDC or 600 VAC, nylon housing, brass contacts, and screw terminals accepting 8–4 AWG wire and 0.750–1.125 in cable diameters

  • Product type50A
  • Product colorBlack/White
  • Secure locking connection prevents accidental disconnection
  • 50 A rating handles heavy-duty industrial loads
  • Nylon housing with brass contacts resists impact and corrosion
  • Accepts 8–4 AWG wire for flexible installation
  • Operates from –40 °C to +75 °C for harsh environments

Industrial Locking Connector 50A 250V

The Hubbell HBL3764C is a three-pole, four-wire twist-lock connector built for industrial and commercial power distribution. Its nylon housing and brass contacts deliver secure connections rated for 50 amps at 600VAC or 250VDC. Electrical contractors and facility managers use it where vibration or movement could disconnect standard plugs.

Verify Cable And Wire Compatibility

Confirm your cable outer diameter falls between .750 in and 1.125 in, with an absolute maximum of 1.25 in and minimum of .83 in. The screw terminals accept only 8 AWG through 4 AWG conductors. Ensure the installation site is a dry, indoor location and that the circuit voltage does not exceed the device ratings.

Sustained Load Temperature Performance

The connector operates continuously from -40°C to +75°C ambient temperature. Under specified overload conditions the temperature rise is limited to +30°C above ambient. This thermal margin supports extended duty cycles in demanding environments without degrading the nylon body or brass contact integrity.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $139.99
Pricier than about 81% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameHubbell Wiring Device-Kellems
Model nameHBL3764C
Product type50A
Product colorBlack/White

Questions about this item

Does the HBL3764C locking connector include the cable or wire, or must those be purchased separately?

The connector body is sold alone; you must supply a cord with a diameter between .750 in and 1.125 in and conductors sized 8 AWG to 4 AWG for the screw terminals.

Should I select this 50 A 250 V DC model or a different rating for my application?

Choose this version when the circuit requires up to 50 A at 250 VDC or 600 VAC; other amperage or voltage ratings need a different Hubbell part number.

What does the 50 A rating mean when the connector is installed in a real panel?

It means the brass contacts and nylon housing are tested to carry 50 A continuously with a maximum temperature rise of 30 °C in ambient conditions from -40 °C to +75 °C.

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