Stud Terminal Blocks | McMaster-Carr

	Number of Circuits Number of Circuits

	Mounting Location Mounting Location


Surface	DIN Rail

	Number of Terminals Per Circuit Number of Terminals Per Circuit

	Voltage Voltage

	Terminal Size Terminal Size

	Wire Connection Type Wire Connection Type

Stud Terminals

Screw Terminals

	Current Current

	For Input Wire Gauge For Input Wire Gauge

#1
#2
#3
#4
14
12
10
8
6
4
3
2
1
1/0
2/0
3/0
4/0

	Current Per Circuit Current Per Circuit

	Number of Output Connections Per Circuit Number of Output Connections Per Circuit

	Width Width

	Height Height

	Length Length

	Number of Input Connections Per Circuit Number of Input Connections Per Circuit

	Input Wire Connection Type Input Wire Connection Type

Stud Terminals

Screw-Clamp Terminals

	Number of Mounting Holes Number of Mounting Holes

	Specifications Met Specifications Met

CE Marked

CSA

UL 94

	Output Wire Connection Type Output Wire Connection Type

Stud Terminals

Screw-Clamp Terminals

	Maximum Temperature Maximum Temperature

176° F

185° F

257° F

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Mounting Hole Center-to-Center Length Mounting Hole Center- to-Center Length

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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32 Products

Harsh Environment High-Current Distribution Bars

One Circuit with Stud Terminals

One Circuit with Stud and Screw Terminals

Two Circuits with Stud and Screw Terminals

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.

Covers protect the top of the bar and prevent accidental contact with live circuits.

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

Distribution Bars
Current		Terminals						Mounting Holes					Covers
300V AC	48V DC	No. Per Circuit	Size	Lg.	Wd.	Ht.	Mounting Fasteners Included	Dia.	No. of	Specifications Met		Each		Each
Stud Terminals
1-Circuit Bars
100A	100A	4	No. 10	4 3/16"	7/8"	1 1/8"	No	0.21"	2	CE Marked	0000000	000000	0000000	00000
130A	150A	4	1/4"	5 7/8"	1 1/4"	1 1/2"	No	0.21"	2	CE Marked	0000000	00000	0000000	0000
250A	250A	4	5/16"	5 7/8"	1 1/2"	1 11/16"	No	0.21"	2	CE Marked	0000000	00000	0000000	00000
250A	250A	6	5/16"	7 3/4"	1 1/2"	1 11/16"	No	0.21"	2	CE Marked	000000	00000	0000000	00000

Distribution Bars
Current		Stud Terminals		Screw Terminals						Mounting Holes					Covers
300V AC	48V DC	No. Per Circuit	Size	No. Per Circuit	Size	Lg.	Wd.	Ht.	Mounting Fasteners Included	Dia.	No. of	Specifications Met		Each		Each
Stud and Screw Terminals
1-Circuit Bars
100A	100A	2	No. 10	5	No. 8	4 3/16"	7/8"	1 1/8"	No	0.21"	2	CE Marked	0000000	000000	0000000	00000
130A	150A	2	1/4"	10	No. 8	5 7/8"	1 1/4"	1 1/2"	No	0.21"	2	CE Marked	0000000	00000	0000000	0000
130A	150A	2	1/4"	20	No. 8	9 1/8"	1 1/4"	1 1/2"	No	0.21"	2	CE Marked	0000000	00000	0000000	0000
250A	250A	2	5/16"	6	No. 10	5 7/8"	1 1/2"	1 11/16"	No	0.21"	2	CE Marked	000000	00000	0000000	00000
250A	250A	2	5/16"	12	No. 10	7 3/4"	1 1/2"	1 11/16"	No	0.21"	2	CE Marked	0000000	00000	0000000	00000
545A	600A	4	3/8"	4	No. 8	7"	2"	2"	No	0.26"	4	CE Marked	000000	000000	0000000	00000
545A	600A	8	3/8"	4	No. 8	11 3/8"	2"	2"	No	0.39"	4	CE Marked	000000	000000	000000	00
2-Circuit Bars
130A	150A	2	1/4"	5	No. 10	4 7/8"	2 9/16"	1 1/4"	No	0.21"	2	CE Marked	0000000	00000	000000	00

Distribution Blocks

With the help of distribution blocks, you can take a high-current wire from your power source and connect it to one or more electrical devices.

Blocks with a screw-clamp terminal input wire connection have a current rating based on NEC table 310-16 using 75° C copper wire.

Extendable blocks attach to each other to create custom-sized distribution blocks.

Blocks with a detachable cover prevent accidental contact with live circuits.

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

Screw-Clamp Terminals

		No. of Connections Per Circuit
Current Per Circuit, A	Voltage	Input (For Wire Gauge)	Output (For Wire Gauge)	Wd.	Ht.	Dp.	Environmental Rating	Specifications Met	Features		Each
Surface Mount
1-Circuit Blocks
335	600V AC/600V DC	2 (14-4/0)	8 (14-2)	2 1/4"	4 3/8"	3 3/16"	IP20	UL Recognized Component, CSA Certified, CE Marked, UL 94 V-0	Extendable	0000000	000000
760	600V AC	2 (4-4/0)	8 (14-2/0)	2 1/2"	4.63"	3 3/8"	IP20	UL Listed, CSA Certified, CE Marked, UL 94 V-0	Extendable	0000000	00000
760	600V AC/600V DC	2 (4-4/0)	12 (14-4)	2 1/2"	4.63"	3 3/8"	IP20	UL Listed, CSA Certified, CE Marked, UL 94 V-0	Extendable	0000000	00000
3-Circuit Blocks
335	600V AC/600V DC	1 (14-4/0)	6 (14-2)	5 5/8"	5"	3 15/16"	__	UL Listed, CSA Certified	__	0000000	00000
350	600V AC/600V DC	2 (14-2/0)	6 (14-4)	5 5/8"	5"	3 15/16"	__	UL Listed, CSA Certified	__	0000000	00000
510	600V AC/600V DC	2 (6-4/0)	8 (14-2)	5 5/8"	5"	3 15/16"	__	UL Listed, CSA Certified	__	0000000	000000

Stud Terminals

		No. of Connections Per Circuit
Current Per Circuit, A	Voltage	Input (For Wire Gauge)	Output (For Wire Gauge)	Terminal Size	Wd.	Ht.	Dp.	Specifications Met	Features		Each
DIN-Rail Mount
1-Circuit Blocks
200	600V AC/600V DC	1 (14-3/0)	1 (14-3/0)	1/4"	1"	3"	2 9/16"	UL Recognized Component, CSA Certified, CE Marked	Detachable Cover	0000000	000000
2-Circuit Blocks
200	600V AC/600V DC	1 (14-3/0)	1 (14-3/0)	1/4"	1 7/8"	3"	2 9/16"	UL Recognized Component, CSA Certified, CE Marked	Detachable Cover	0000000	00000
3-Circuit Blocks
200	600V AC/600V DC	1 (14-3/0)	1 (14-3/0)	1/4"	2 1/2"	3"	2 9/16"	UL Recognized Component, CSA Certified, CE Marked	Detachable Cover	0000000	00000
Surface Mount
1-Circuit Blocks
310	600V AC/600V DC	1 (14-4/0)	1 (14-4/0)	3/8"	2"	4"	3 1/2"	UL Recognized Component, CSA Certified, CE Marked	Detachable Cover	0000000	00000
2-Circuit Blocks
310	600V AC/600V DC	1 (14-4/0)	1 (14-4/0)	3/8"	3 5/8"	4"	3 1/2"	UL Recognized Component, CSA Certified, CE Marked	Detachable Cover	0000000	00000
3-Circuit Blocks
310	600V AC/600V DC	1 (14-4/0)	1 (14-4/0)	3/8"	5 3/8"	4"	3 1/2"	UL Recognized Component, CSA Certified, CE Marked	Detachable Cover	0000000	000000

Distribution Posts

Stack multiple ring or spade terminals on the stud terminal; the current flows through the stacked terminals. The round design saves space.

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

Terminals							Mounting Holes
No. Per Circuit	Size	Voltage	Lg.	Wd.	Ht.	Mounting Fasteners Included	Dia.	No. of	Specifications Met		Each
Stud Terminals
1-Circuit Posts
1	1/4"	48V DC	1 5/8"	13/16"	1 3/8"	No	3/16"	2	CE Marked	000000	000000
1	3/8"	48V DC	3 5/16"	1 3/4"	2"	No	1/4"	2	CE Marked	000000	00000