Ground Terminal Blocks | McMaster-Carr

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151 Products

Modular DIN-Rail Mount Terminal Blocks

Mix and match these terminal blocks to get the exact number of circuits you need in a single setup. Add blocks for thermocouples, fuses, and grounding wire as needed. The blocks clip side by side onto DIN rail in control panels, creating tidy rows of circuits that you can identify and access on the spot.

The screw-clamp terminals flatten your wire so it stays put when vibrated or pulled. If you need to change wiring frequently without adjusting a screw, consider a quick-connect terminal block with spring-clamp or lever-clamp terminals.

Ground Terminal Blocks with Screw-Clamp Terminals

Connect grounding wire to DIN rail so fault currents can safely flow to ground. These terminal blocks should only be used for grounding circuits.

End Stops—Mount at the end of a group of terminal blocks so they don't slide when vibrated or bumped.

Terminal Blocks											End Stops
									Each
No. of Circuits	No. of Terminals per Circuit	For Wire Ga.	Wd., mm	Ht., mm	Color	For DIN Rail Trade Size	Enclosure Rating		1-24	25-Up		Each



	1	2	22 to 12	5	43.5	Green/Yellow	1, 3	IP20	7641K931	00000	00000	7641K35	00000
	1	2	22 to 12	6	43.8	Green/Yellow	1, 3	IP20	7641K81	0000	0000	7641K35	0000
	1	2	22 to 8	8	43.8	Green/Yellow	1, 3	IP20	7641K82	0000	0000	7641K35	0000
	1	2	20 to 6	10	43.8	Green/Yellow	1, 3	IP20	7641K83	0000	0000	7641K35	0000
	1	2	14 to 4	12	49.5	Green/Yellow	1, 3	IP20	7641K171	0000	0000	7641K35	0000
	1	2	8 to 1/0	16	49	Green/Yellow	1, 3	IP20	7641K181	00000	0000	7641K35	0000
	1	4	22 to 10	6	63.5	Green/Yellow	1, 3	IP20	7641K847	0000	0000	7641K35	0000
	1	7	22 to 12	6	90	Green/Yellow	1, 3	IP20	7641K848	00000	00000	7641K757	0000

Markers

Label your terminal block connections so you can identify them at a glance.

							Each
	For No. of Circuits	For Terminal Block Wd., mm	Number Range	Markers per Card	Color		1-24	25-Up
Blank



		1, 2	5	—	100	White	7641K983	00000	00000
		1, 2	6	—	100	White	7641K19	0000	0000
		1, 2	8, 10, 12, 13, 16, 22	—	100	White	7641K981	0000	0000


		Numbered for Horizontal Rails



				1, 2	5	1 to 100	100	White	7641K95	0000	0000
				1, 2	5	101 to 200	100	White	7641K96	0000	0000
				1, 2	6	1 to 100	100	White	7641K75	0000	0000
				1, 2	6	101 to 200	100	White	7641K76	0000	0000
				1, 2	8, 10, 12, 13, 16, 22	1 to 100	100	White	7641K991	0000	0000
				1, 2	8, 10, 12, 13, 16, 22	101 to 200	100	White	7641K992	0000	0000


				Numbered for Vertical Rails



						1, 2	5	1 to 100	100	White	7641K97	0000	0000
						1, 2	5	101 to 200	100	White	7641K98	0000	0000
						1, 2	6	1 to 100	100	White	7641K77	0000	0000
						1, 2	6	101 to 200	100	White	7641K78	0000	0000
						1, 2	8, 10, 12, 13, 16, 22	1 to 100	100	White	7641K993	0000	0000
						1, 2	8, 10, 12, 13, 16, 22	101 to 200	100	White	7641K994	0000	0000

Fuse Terminal Blocks with Screw-Clamp Terminals

Install a fuse in the built-in fuse holder so excess current doesn't damage your equipment. If the current exceeds the limit, the fuse will blow and cut power to connected components.

Blown Fuse Indicator—A light goes on when the fuse blows, so you can spot an overloaded circuit without cutting power or touching equipment.

Covers—Snap onto the exposed side of a terminal block to prevent accidental contact with a live wire.

End Stops—Mount at the end of a group of terminal blocks so they don't slide when vibrated or bumped.

Bar Jumpers—Metal poles create an electrical connection between blocks, so you can connect multiple components with a single wire. Blocks must be the same width for the jumpers to fit. Cut jumpers to size with a hacksaw or high-force wire cutter. Add covers so jumpers don't touch the screws on the outermost blocks.

Insulation—Terminal blocks with insulated jumpers maintain their IP20 rating to prevent shocks and short circuits. Blocks with noninsulated jumpers lose their IP20 rating for touch protection because the jumpers introduce exposed metal to the circuit.

Terminal Blocks																Covers		End Stops		Bar Jumpers
					For Fuse									Each
No. of Circuits	No. of Terminals per Circuit	For Wire Ga.	Wd., mm	Ht., mm	Overall Dia., mm	Overall Lg., mm	Type	Circuit Status Indicator Type	Blown Fuse Indicator Voltage	For DIN Rail Trade Size	Enclosure Rating	Color		1-24	25-Up		Each		Each	Insulation		Each





			300V AC/300V DC—6.3 amp per Circuit

			2 1 (Ground)	2 1 (Ground)	20 to 12	8	99	5	20	Ceramic, Glass	—	—	3	IP20	Gray	7641K861	000000	000000	7641K765	00000	7641K757	00000	Noninsulated	7641K16	000000
			2 1 (Ground)	2 1 (Ground)	20 to 12	8	99	5	20	Ceramic, Glass	Blown Fuse	24V DC 60V DC 110V AC	3	IP20	Gray	7641K864	00000	00000	7641K765	0000	7641K757	0000	Noninsulated	7641K16	00000
			2 1 (Ground)	2 1 (Ground)	20 to 12	8	99	5	20	Ceramic, Glass	Blown Fuse	110V AC 230V AC	3	IP20	Gray	7641K865	00000	00000	7641K765	0000	7641K757	0000	Noninsulated	7641K16	00000

Markers


Blank	Numbered for Horizontal Rails	Numbered for Vertical Rails

Label your terminal block connections so you can identify them at a glance.

							Each
	For No. of Circuits	For Terminal Block Wd., mm	Number Range	Markers per Card	Color		1-24	25-Up
Blank



		1, 2	8, 10, 12, 13, 16, 22	—	100	White	7641K981	00000	00000


		Numbered for Horizontal Rails



				1, 2	8, 10, 12, 13, 16, 22	1 to 100	100	White	7641K991	0000	0000
				1, 2	8, 10, 12, 13, 16, 22	101 to 200	100	White	7641K992	0000	0000


				Numbered for Vertical Rails



						1, 2	8, 10, 12, 13, 16, 22	1 to 100	100	White	7641K993	0000	0000
						1, 2	8, 10, 12, 13, 16, 22	101 to 200	100	White	7641K994	0000	0000

Quick-Connect Modular DIN-Rail Mount Terminal Blocks

Pop wire in and out of these terminal blocks without adjusting a screw. Lift the clamp with a screwdriver or built-in lever, then release the clamp down onto the wire. Once clamped in place, the wire will stay put when vibrated, bent, or pulled.

Ground Terminal Blocks with Spring-Clamp Terminals

Connect grounding wire to DIN rail so fault currents can safely flow to ground. These terminal blocks should only be used for grounding circuits.

Covers—Snap onto the exposed side of a terminal block to prevent accidental contact with a live wire.

End Stops—Mount at the end of a group of terminal blocks so they don't slide when vibrated or bumped.

Adjacent Jumpers—Metal poles create an electrical connection between adjacent terminal blocks, so you can connect multiple components with a single wire. Blocks must be the same width for the jumpers to fit.

Terminal Blocks										Covers		End Stops		Adjacent Jumpers
								Each
No. of Circuits	No. of Terminals per Circuit	For Wire Ga.	Wd., mm	Ht., mm	Color	For DIN Rail Trade Size		1-24	25-Up		Each		Each	Insulation		Each



	1	2	28 to 12	5	53	Green/Yellow	3	9473T82	000000	00000	9473T131	00000	9473T144	00000	Insulated	9473T114	00000
	1	2	28 to 12	6	59	Green/Yellow	3	9473T86	00000	0000	9473T134	0000	9473T144	0000	Insulated	9473T117	0000
	1	2	24 to 10	8	74.5	Green/Yellow	3	9473T91	00000	00000	9473T137	0000	9473T144	0000	Insulated	9473T121	0000
	1	2	24 to 8	10	78	Green/Yellow	3	9473T94	00000	00000	9473T139	0000	9473T144	0000	Insulated	9473T124	0000
	1	2	24 to 6	12	94.5	Green/Yellow	3	9473T97	00000	00000	9473T142	0000	9473T144	0000	Insulated	9473T127	0000
	1	2	22 to 14	4.2	50.8	Green/Yellow	3	9473T187	0000	0000	9473T191	0000	9473T144	0000	—	———	0
	1	2	8 to 2	16	100	Green/Yellow	3	9473T99	00000	00000	———	0	9473T144	0000	—	———	0
	1	2	4 to 4/0	25	107	Green/Yellow	3	9473T111	00000	00000	———	0	9473T144	0000	—	———	0
	1	3	28 to 12	5	64	Green/Yellow	3	9473T83	00000	0000	9473T132	0000	9473T144	0000	Insulated	9473T114	0000
	1	3	28 to 12	6	73.5	Green/Yellow	3	9473T87	00000	0000	9473T135	0000	9473T144	0000	Insulated	9473T117	0000


	1	3	24 to 10	8	93	Green/Yellow	3	9473T92	00000	00000	9473T138	0000	9473T144	0000	Insulated	9473T121	0000
	1	3	24 to 8	10	97.5	Green/Yellow	3	9473T95	00000	00000	9473T141	0000	9473T144	0000	Insulated	9473T124	0000
	1	3	24 to 6	12	104.5	Green/Yellow	3	9473T98	00000	00000	9473T143	0000	9473T144	0000	Insulated	9473T127	0000
	1	3	22 to 14	4.2	59.5	Green/Yellow	3	9473T188	0000	0000	9473T192	0000	9473T144	0000	—	———	0
	1	4	28 to 12	5	64	Green/Yellow	3	9473T155	00000	00000	9473T154	0000	9473T144	0000	Insulated	9473T114	0000
	1	4	28 to 12	5	75	Green/Yellow	3	9473T84	00000	0000	9473T133	0000	9473T144	0000	Insulated	9473T114	0000
	1	4	28 to 12	6	86	Green/Yellow	3	9473T88	00000	0000	9473T136	0000	9473T144	0000	Insulated	9473T117	0000
	1	4	22 to 14	4.2	70	Green/Yellow	3	9473T189	0000	0000	9473T195	0000	9473T144	0000	—	———	0

Markers


Blank	Numbered for Horizontal Rails	Numbered for Vertical Rails

Label your terminal block connections so you can identify them at a glance.

							Each
	For Terminal Block Wd., mm	Number Range	Includes	Markers per Card	Color		1-24	25-Up
Blank



		4.2	—	—	100	White	9473T217	00000	00000
		5, 6, 8, 10, 12, 16, 25	—	—	100	White	9473T145	0000	0000


		Numbered for Horizontal Rails



				4.2	1 to 50	Two of Each Number	100	White	9473T218	00000	0000
				5, 6, 8, 10, 12, 16, 25	1 to 50	Two of Each Number	100	White	9473T146	00000	0000


				Numbered for Vertical Rails



						4.2	1 to 50	Two of Each Number	100	White	9473T219	00000	0000
						5, 6, 8, 10, 12, 16, 25	1 to 50	Two of Each Number	100	White	9473T147	00000	0000

Ground Terminal Blocks with Lever- and Spring-Clamp Terminals

Connect grounding wire to DIN rail so fault currents can safely flow to ground. These terminal blocks should only be used for grounding circuits.

Covers—Snap onto the exposed side of a terminal block to prevent accidental contact with a live wire.

End Stops—Mount at the end of a group of terminal blocks so they don't slide when vibrated or bumped.

Terminal Blocks									Covers		End Stops		Adjacent Jumpers
No. of Circuits	No. of Terminals per Circuit	For Wire Ga.	Wd., mm	Ht., mm	Color	For DIN Rail Trade Size		Each		Each		Each	Insulation		Each



	1	1 (Lever Clamp) 1 (Spring Clamp)	22 to 12	5.2	63.8	Green/Yellow	3	4036N13	00000	4036N201	00000	9473T144	00000	Insulated	4036N301	00000
	1	1 (Lever Clamp) 1 (Spring Clamp)	20 to 10	6.2	70.7	Green/Yellow	3	4036N19	00000	4036N203	0000	9473T144	0000	Insulated	4036N302	0000
	1	1 (Lever Clamp) 1 (Spring Clamp)	20 to 8	7.5	75.2	Green/Yellow	3	4036N26	00000	4036N205	0000	9473T144	0000	Insulated	4036N303	0000
	1	1 (Lever Clamp) 1 (Spring Clamp)	20 to 6	10	89	Green/Yellow	3	4036N33	00000	4036N207	0000	9473T144	0000	Insulated	4036N304	0000
	1	1 (Lever Clamp) 1 (Spring Clamp)	20 to 6	12	91.5	Green/Yellow	3	4036N39	00000	4036N209	0000	9473T144	0000	Insulated	4036N305	0000
	1	1 (Lever Clamp) 2 (Spring Clamp)	22 to 12	5.2	72.2	Green/Yellow	3	4036N16	00000	4036N202	0000	9473T144	0000	Insulated	4036N301	0000
	1	1 (Lever Clamp) 2 (Spring Clamp)	20 to 10	6.2	83.2	Green/Yellow	3	4036N23	00000	4036N204	0000	9473T144	0000	Insulated	4036N302	0000
	1	1 (Lever Clamp) 2 (Spring Clamp)	20 to 8	7.5	91.2	Green/Yellow	3	4036N29	00000	4036N206	0000	9473T144	0000	Insulated	4036N303	0000
	1	1 (Lever Clamp) 2 (Spring Clamp)	20 to 6	10	110.4	Green/Yellow	3	4036N36	00000	4036N208	0000	9473T144	0000	Insulated	4036N304	0000
	1	1 (Lever Clamp) 2 (Spring Clamp)	20 to 6	12	113.5	Green/Yellow	3	4036N43	00000	4036N211	0000	9473T144	0000	Insulated	4036N305	0000

Markers

Blank

Label your terminal block connections so you can identify them at a glance.

	Markers per Card	Color		Each
Blank



	5.2, 6.2, 7.5, 10, 12	100	White	4036N401	00000

Harsh-Environment High-Current Distribution Bars


Stud Terminals 1 Circuit	Screw Terminals 2 Circuits

Stud and Screw Terminals 1 Circuit	Stud and Screw Terminals 2 Circuits

Protect connections against corrosion. These bars are tin-plated copper and have stainless steel terminals. Also known as bus bars, they serve as connection points between wires with ring or spade terminals. The underside is sealed, so the bars can be safely mounted to conductive surfaces.

Distribution Bar Covers—Distribution bar covers protect the top of the bar and prevent accidental contact with live circuits.

	Distribution Bars															Distribution Bar Covers
			Stud Terminals		Screw Terminals						Mounting Holes
	Voltage	Current	No. per Circuit	Size	No. per Circuit	Size	Lg.	Wd.	Ht.	Mounting Fasteners Included	Dia.	No. of	Certification		Each		Each
Stud Terminals





				1 Circuit

				300V AC 48V DC	100 amp 100 amp	4	No. 10	—	—	4 3/16"	7/8"	1 1/8"	No	0.21"	2	CE Marked	9290T32	000000	9290T27	00000
				300V AC 48V DC	130 amp 150 amp	4	1/4"	—	—	5 7/8"	1 1/4"	1 1/2"	No	0.21"	2	CE Marked	9290T16	00000	9290T21	0000
				300V AC 48V DC	250 amp 250 amp	4	5/16"	—	—	5 7/8"	1 1/2"	1 11/16"	No	0.21"	2	CE Marked	9290T17	00000	9290T29	00000
				300V AC 48V DC	250 amp 250 amp	6	5/16"	—	—	7 3/4"	1 1/2"	1 11/16"	No	0.21"	2	CE Marked	9290T8	00000	9290T28	00000


				Screw Terminals





								2 Circuits

								300V AC 48V DC	100 amp 100 amp	—	—	5	No. 8	3"	1 13/16"	9/16"	No	0.21"	2	CE Marked	9290T12	00000	9290T25	00000
								300V AC 48V DC	100 amp 100 amp	—	—	10	No. 8	5 1/16"	1 13/16"	9/16"	No	0.21"	2	CE Marked	9290T13	00000	9290T26	00000


								Stud and Screw Terminals





												1 Circuit

												300V AC 48V DC	100 amp 100 amp	2	No. 10	5	No. 8	4 3/16"	7/8"	1 1/8"	No	0.21"	2	CE Marked	9290T31	00000	9290T27	0000
												300V AC 48V DC	130 amp 150 amp	2	1/4"	10	No. 8	5 7/8"	1 1/4"	1 1/2"	No	0.21"	2	CE Marked	9290T14	00000	9290T21	0000
												300V AC 48V DC	130 amp 150 amp	2	1/4"	20	No. 8	9 1/8"	1 1/4"	1 1/2"	No	0.21"	2	CE Marked	9290T15	00000	9290T24	0000
												300V AC 48V DC	250 amp 250 amp	2	5/16"	6	No. 10	5 7/8"	1 1/2"	1 11/16"	No	0.21"	2	CE Marked	9290T9	00000	9290T29	00000
												300V AC 48V DC	250 amp 250 amp	2	5/16"	12	No. 10	7 3/4"	1 1/2"	1 11/16"	No	0.21"	2	CE Marked	9290T18	00000	9290T28	00000
												300V AC 48V DC	545 amp 600 amp	4	3/8"	4	No. 8	7"	2"	2"	No	0.26"	4	CE Marked	9290T3	000000	9290T23	00000
												300V AC 48V DC	545 amp 600 amp	8	3/8"	4	No. 8	11 3/8"	2"	2"	No	0.39"	4	CE Marked	9290T7	000000	———	0




														2 Circuits

														300V AC 48V DC	130 amp 150 amp	2	1/4"	5	No. 10	4 7/8"	2 9/16"	1 1/4"	No	0.21"	2	CE Marked	9290T11	00000	———	0

Space-Saving Modular DIN-Rail Mount Terminal Blocks

These handle the same voltage and power as our other modular blocks while taking up about half the vertical space. Snap them onto DIN 2 rail (also known as mini rail), which is lower in height than DIN 3 rail.

The screw-clamp or spring-clamp terminals flatten your wire so it stays put when vibrated or pulled. For an even stronger and more conductive connection, crimp a terminal or wire ferrule onto the end of the wire.

Mix and match blocks to get the exact number of circuits you need in a single setup. Add terminal blocks for fuses and grounding wire as needed. The blocks clip side by side onto DIN rail in control panels, creating tidy rows of circuits that you can identify and access on the spot.

Ground Terminal Blocks with Screw-Clamp Terminals

Image of Product. Front orientation. Terminal Blocks. Space-Saving Modular DIN-Rail Mount Terminal Blocks, Ground Terminal Blocks with Screw-Clamp Terminals.

Connect grounding wire to DIN rail so fault currents can safely flow to ground. These terminal blocks should only be used for grounding circuits.

A screw presses the clamp onto the wire for a secure hold.

Covers—Snap onto the exposed side of a terminal block to prevent accidental contact with a live wire.

End Stops—Mount at the end of a group of terminal blocks so they don't slide when vibrated or bumped.

Terminal Blocks											Covers		End Stops
									Each
No. of Circuits	No. of Terminals per Circuit	For Wire Ga.	Wd., mm	Ht., mm	Color	For DIN Rail Trade Size	Enclosure Rating		1-24	25-Up		Each		Each



	1	2	22 to 12	6	28	Green/Yellow	2	IP20	7641K63	00000	00000	7641K961	00000	7641K69	00000

Markers


Blank	Numbered for Horizontal Rails	Numbered for Vertical Rails

Label your terminal block connections so you can identify them at a glance.

							Each
	For No. of Circuits	For Terminal Block Wd., mm	Number Range	Markers per Card	Color		1-24	25-Up
Blank



		1	6	—	100	White	7641K812	00000	00000


		Numbered for Horizontal Rails



				1	6	1 to 100	100	White	7641K834	0000	0000
				1	6	101 to 200	100	White	7641K835	0000	0000


				Numbered for Vertical Rails



						1	6	1 to 100	100	White	7641K832	0000	0000
						1	6	101 to 200	100	White	7641K833	0000	0000

Modular Distribution Bars

Build your own distribution system for neutral and grounding applications by adding terminal blocks to these bars. Slide blocks onto the bar, also known as a bus bar, and then attach mounting brackets to the bar. All wires make contact with the bar, distributing the current among the terminal blocks.

Bars

Lg., m	Wd., mm	Ht., mm		Each
1	6	6	1529T22	000000
1	10	3	1529T21	00000

Brackets


Surface Mount	DIN-Rail Mount

		Mounting Holes
	Mounting Fasteners Included	Dia.	No. of	Pkg. Qty.		Pkg.
Surface Mount	No	0.16"	1	5	1529T31	00000
DIN-Rail Mount for DIN 3 Rails	—	—	—	5	1529T32	00000

Terminal Blocks

Terminal blocks have screw-clamp terminals that secure the wire as well as the block to the bar. Blocks are UL recognized for grounding applications.

Terminal Blocks										Terminal Block Markers
No. of Circuits	For Wire Ga.	Wire Connection	Wd., mm	Lg., mm	Ht., mm	Certification	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
1	22, 20, 18, 16, 14, 12, 10	Screw-Clamp Terminal	7.5	30	23.3	UL Recognized Component	5	1529T11	00000	100	1529T33	00000
1	10, 8, 6, 4	Screw-Clamp Terminal	9.8	36	23.3	UL Recognized Component	5	1529T12	0000	100	1529T34	0000
1	8, 6, 4, 2	Screw-Clamp Terminal	14.5	45	27.3	UL Recognized Component	5	1529T13	0000	100	1529T34	0000

Quick-Connect Plug-and-Socket Modular DIN-Rail Mount Terminal Blocks

Cut power with the pull of a plug when you need to swap out equipment or adjust your circuit. One of the openings on these blocks is a socket, so you can wire a plug outside the enclosure and then attach it to the socket that’s already in place.

The other connections are spring clamps, so you can pop wire in and out of these terminal blocks without adjusting a screw. Lift the clamp with a screwdriver, then release the clamp down onto the wire. Once clamped in place, the wire will stay put when vibrated, bent, or pulled.

Mix and match these terminal blocks to get the exact number of circuits you need in a single setup. Add blocks for grounding wire as needed. The blocks clip side by side onto DIN rail in control panels, creating tidy rows of circuits that you can identify and access on the spot.

Ground Sockets with Spring-Clamp Terminals

Connect grounding wire to DIN rail so fault currents can safely flow to ground. These terminal blocks should only be used for grounding circuits.

Covers—Snap onto the exposed side of a terminal block to prevent accidental contact with a live wire.

End Stops—Mount at the end of a group of terminal blocks so they don't slide when vibrated or bumped.

Terminal Blocks									Covers		End Stops		Adjacent Jumpers
No. of Circuits	No. of Terminals per Circuit	For Wire Ga.	Wd., mm	Ht., mm	Color	For DIN Rail Trade Size		Each		Each		Each	Insulation		Each



	1	1	24 to 16	3.5	50.8	Green/Yellow	3	4053N13	00000	4053N401	00000	9473T144	00000	Insulated	4280N401	00000
	1	1	24 to 16	3.5	61.8	Green/Yellow	3	4053N16	0000	4053N402	0000	9473T144	0000	Insulated	4280N401	0000
	1	1	24 to 16	3.5	85.25	Green/Yellow	3	4053N19	0000	4053N403	0000	9473T144	0000	Insulated	4280N401	0000

Markers

Blank

Label your terminal block connections so you can identify them at a glance.

	Markers per Card	Color		Each
Blank



	3.5	100	White	4053N501	00000

Plugs with Spring-Clamp Terminals

Wd., mm	Ht., mm	Color		Each





300V AC/300V DC—10 amp per Circuit

1	1	24 to 16	3.5	40.5	Gray	4053N303	00000
2	2	24 to 16	7.7	48.9	Gray	4053N302	0000