300A Outlets | McMaster-Carr

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24 Products

High-Current Pin-and-Sleeve Connectors

A high current rating makes these connectors suitable for use in industrial machinery and floodlights. Current rating is based on using these connectors with the largest size 194° F rated cable in the wire size range given; current ratings decrease as the cable size decreases. The housing is shatter- and crack-resistant rubber so they can withstand rough environments. Push and twist to join plugs and sockets. When mated, they form a vibration-resistant connection to prevent accidental disconnection. Rated NEMA 3R, they protect against falling liquids and light splashing.

Adapters (sold separately) allow you to change the connector’s gender and make multiple connections from a single power source.

Caps (sold separately) protect connectors when not in use.

For technical drawings and 3-D models, click on a part number.

Plugs

Connectors											Replacement Housings
Current	Voltage	No. of Poles	Wire Connection Type	For Wire Gauge	OD	Temp. Range, °F	Environmental Rating	Choose a Color		Each		Each
300A	600V AC/600V DC	1	Screw Terminals	2-2/0	1.7"	-75° to 220°	NEMA 3R	Black, Blue, Green, Red, White	0000000	000000	0000000	000000

Sockets

Connectors											Replacement Housings
Current	Voltage	No. of Poles	Wire Connection Type	For Wire Gauge	OD	Temp. Range, °F	Environmental Rating	Choose a Color		Each		Each
300A	600V AC/600V DC	1	Screw Terminals	2-2/0	1.7"	-75° to 220°	NEMA 3R	Black, Blue, Green, Red, White	0000000	000000	0000000	000000

Caps

For Male

For Female

For Gender	For Connector Current	Material	Includes	Environmental Rating	Choose a Color		Each
Male	300 A/400 A	Rubber	Lanyard	NEMA 3R	Black, Blue, Green, Red, White	0000000	000000
Female	300 A/400 A	Rubber	Lanyard	NEMA 3R	Black, Blue, Green, Red, White	0000000	00000

Adapters

Straight, Female × Female

Straight, Male × Male

Tee, Male × Female × Female

Tee, Male × Male × Female

Double Wye, Female × Male × Male × Male

Double Wye, Male × Female × Female × Female

Shape	For Connector Current	Voltage	Temp. Range, °F	Environmental Rating	Choose a Color		Each
Straight, Female × Female	300A/400A	600V AC/600V DC	-75° to 220°	NEMA 3R	Black, Blue, Green, Red, White	0000000	000000
Straight, Male × Male	300A/400A	600V AC/600V DC	-75° to 220°	NEMA 3R	Black, Blue, Green, Red, White	0000000	00000
Tee, Male × Female × Female	300A/400A	600V AC/600V DC	-75° to 220°	NEMA 3R	Black, Blue, Green, Red, White	0000000	000000
Tee, Male × Male × Female	300A/400A	600V AC/600V DC	-75° to 220°	NEMA 3R	Black, Blue, Green, Red, White	0000000	000000
Double Wye, Female × Male × Male × Male	300A/400A	600V AC/600V DC	-75° to 220°	NEMA 3R	Black, Green	0000000	000000
Double Wye, Male × Female × Female × Female	300A/400A	600V AC/600V DC	-75° to 220°	NEMA 3R	Black, Blue, Green, Red, White	0000000	000000

Caps for High-Current Pin-and-Sleeve Connectors

For Female

For Male

Protect high-current connectors when not in use.

For technical drawings and 3-D models, click on a part number.

For Female
For Current	Manufacturer	Material	Includes	Color	Environmental Rating	Specifications Met	Manufacturer Model No.		Each
300 A/400 A	Leviton	Rubber	Lanyard	Black	NEMA 3R	UL Listed, CSA Certified	16P22-UE	00000000	000000
300 A/400 A	Leviton	Rubber	Lanyard	Blue	NEMA 3R	UL Listed, CSA Certified	16P22-UB	00000000	00000
300 A/400 A	Leviton	Rubber	Lanyard	Green	NEMA 3R	UL Listed, CSA Certified	16P22-UG	00000000	00000
300 A/400 A	Leviton	Rubber	Lanyard	Red	NEMA 3R	UL Listed, CSA Certified	16P22-UR	00000000	00000
300 A/400 A	Leviton	Rubber	Lanyard	White	NEMA 3R	UL Listed, CSA Certified	16P22-UW	00000000	00000
For Male
300 A/400 A	Leviton	Rubber	Lanyard	Black	NEMA 3R	UL Listed, CSA Certified	16P21-UE	00000000	00000
300 A/400 A	Leviton	Rubber	Lanyard	Blue	NEMA 3R	UL Listed, CSA Certified	16P21-UB	00000000	00000
300 A/400 A	Leviton	Rubber	Lanyard	Green	NEMA 3R	UL Listed, CSA Certified	16P21-UG	00000000	00000
300 A/400 A	Leviton	Rubber	Lanyard	Red	NEMA 3R	UL Listed, CSA Certified	16P21-UR	00000000	00000
300 A/400 A	Leviton	Rubber	Lanyard	White	NEMA 3R	UL Listed, CSA Certified	16P21-UW	00000000	00000

Vibration-Resistant High-Current Connectors

Make secure connections with machine tools, robots, and other equipment that vibrates frequently and carries currents as high as 300 amps. A wave spring holds these connectors firmly in place when mated, so they won’t come loose. They also evenly distribute force to absorb vibration. To install, push them into a compatible connector and lock with a quarter turn. A click confirms they’re secured. You can pull these connectors out quickly and easily for maintenance.

IP67 rated when connected, all block out dust and can be briefly submerged under water. Their insulation insert meets UL 94 V-0, so it resists catching fire.

For technical drawings and 3-D models, click on a part number.

Male Panel-Mount Tab-Terminal Receptacles—External Housing Lock

Front

Back

											Mounting
Number of Poles	Voltage	Current	For Wire Gauge	For Panel Cutout Dia.	Lg.	Wd.	Ht.	Housing Material	Temperature Range, °F	Connector Shell Size	Fasteners Included	Number of Holes	Hole Dia.	Specifications Met		Each
1	630V AC/630V DC	300A	1/0	1.36"	2.8"	1.4"	1.4"	Nickel-Plated Zinc	-40° to 255°	20	No	4	0.16"	UL 94 V-0	0000000	000000

High-Current Pin-and-Sleeve Cords

Send power from generators to keep the lights on and equipment running. These cords are often used to convey temporary power during outages or at trade shows and mobile job sites. Able to send currents above 250A, they’re commonly connected to power distribution panels and transfer switches. Push and twist to lock them in place, where they remain secure against high current loads, vibration, and pulling. They don’t require tools to connect or disconnect, making them convenient for short-term setups.

For outdoor use, these cords are rated NEMA 3R for protection from rain, snow, and sleet. They also resist sunlight, oil, and chemicals.

For technical drawings and 3-D models, click on a part number.

					Cord
Wire Gauge	Current, A	Voltage	No. of Poles	Lg., ft.	OD	Insulation Material	Temp. Range, °F	Environmental Rating	Color	Choose a Connection End Color		Each
Straight Male Plug × Straight Female Socket
2/0	300	600V AC	1	25	0.68"	Chlorinated Polyethylene Plastic	-55° to 220°	NEMA 3R	Black	Black, Green, Red	000000	0000000