Terminal Block Labels | McMaster-Carr

	For Wire Gauge For Wire Gauge

28
26
24
22
20
18
16
14
12
10
8
6
4
2
1/0
2/0
3/0
4/0

	Number of Terminals Per Circuit Number of Terminals Per Circuit

	Color Color

	Gray
	Blue
	Orange
	Black
	Red
	Yellow
	Green/Yellow

	Width Width

	Length Length

	Height Height

	Number of Circuits Number of Circuits

	Voltage Voltage

	Grounding Grounding

Non-Grounded

Grounded

	Specifications Met Specifications Met

CSA

UL 94

	Current Per Circuit Current Per Circuit

	For Maximum Screwdriver Size For Maximum Screwdriver Size

2.5 mm

3.5 mm

5.5 mm

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

DFARS Specialty Metals
COTS-Exempt

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

REACH Compliant

	For Signal Output Type For Signal Output Type

106 Products

Quick and Secure Modular DIN-Rail Mount Terminal Blocks

No need to tighten or loosen any screws—these terminals lock your wiring in place with spring clamps. Insert a slotted screwdriver to release the spring clamp and then push your wire into place. Spring-clamp wire connections withstand vibration and temperature changes. You can add as many circuits as needed with these terminal blocks and accessories; blocks mount side-by-side on DIN 3 rail.

Rated UL 94 V-0, all meet flammability standards.

Grounding terminal blocks facilitate grounding circuits by electrically connecting wires to DIN rail. They shouldn’t be used for applications other than grounding.

Use blocks with a disconnect tab to toggle your circuit open and closed for testing.

End covers fit on the open side of a block to prevent accidental contact with a live circuit.

End stops mount at the end of a group of blocks to keep them in place.

Jumpers connect circuits between blocks to simplify wiring and leave terminals available to connect equipment. Adjacent jumpers connect terminals on adjacent blocks of the same width. Alternate jumpers connect terminals on two blocks of the same width, skipping a block in between.

Marker cards fit into built-in label holders on the blocks. Numbered marker cards include two of each number (1-50).

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

Terminal Blocks—One Circuit with Spring-Clamp Terminals

One Circuit with Two Terminals

Terminal Blocks								End Covers		End Stops		Adjacent Jumpers		Alternate Jumpers
Wd., mm	No. of Terminals Per Circuit	Current Per Circuit, A	For Wire Gauge	Includes	Choose a Color		Each		Each		Each		Each		Each
600V AC/600V DC
4.2	2	15	22-14	__	Black, Blue, Gray, Orange, Red, Yellow	00000000	00000	00000000	00000	00000000	00000	00000000	00000	00000000	00000
4.2	3	15	22-14	__	Black, Blue, Gray, Orange, Red, Yellow	00000000	0000	00000000	0000	00000000	0000	00000000	000	00000000	0000
4.2	4	15	22-14	__	Black, Blue, Gray, Orange, Red, Yellow	00000000	0000	00000000	0000	00000000	0000	00000000	000	00000000	0000
5	2	20	28-12	__	Black, Blue, Gray, Orange, Red, Yellow	000000	0000	00000000	0000	00000000	0000	00000000	0000	00000000	0000
5	3	20	28-12	__	Black, Blue, Gray, Orange, Red, Yellow	000000	0000	00000000	0000	00000000	0000	00000000	0000	00000000	0000
5	4	20	28-12	__	Black, Blue, Gray, Orange, Red, Yellow	0000000	0000	00000000	0000	00000000	0000	00000000	0000	00000000	0000
6	2	20	28-12	__	Black, Blue, Gray, Orange, Red, Yellow	0000000	0000	00000000	0000	00000000	0000	00000000	0000	00000000	0000
6	3	20	28-12	__	Black, Blue, Gray, Orange, Red, Yellow	0000000	0000	00000000	0000	00000000	0000	00000000	0000	00000000	0000
6	4	20	28-12	__	Black, Blue, Gray, Orange, Red, Yellow	0000000	0000	00000000	0000	00000000	0000	00000000	0000	00000000	0000
8	2	30	24-10	__	Blue, Gray, Orange	0000000	0000	00000000	0000	00000000	0000	00000000	0000	00000000	0000
8	3	30	24-10	__	Blue, Gray, Orange	0000000	0000	00000000	0000	00000000	0000	00000000	0000	00000000	0000
10	2	50	24-8	__	Blue, Gray, Orange	0000000	0000	00000000	0000	00000000	0000	00000000	0000	00000000	0000
10	3	50	24-8	__	Blue, Gray, Orange	0000000	00000	00000000	0000	00000000	0000	00000000	0000	00000000	0000
12	2	65	24-6	__	Blue, Gray, Orange	0000000	0000	00000000	0000	00000000	0000	00000000	0000	00000000	0000
12	3	65	24-6	__	Blue, Gray, Orange	0000000	00000	00000000	0000	00000000	0000	000000	00	00000000	0000
16	2	115	8-2	End Covers	Blue, Gray	0000000	00000	000000	00	00000000	0000	00000000	0000	000000	00
25	2	200	4-4/0	End Covers	Blue, Gray	0000000	00000	000000	00	00000000	0000	00000000	00000	000000	00

Terminal Blocks—Two Circuits with Spring-Clamp Terminals

Two Circuits

Terminal Blocks								End Covers		End Stops		Adjacent Jumpers		Alternate Jumpers
Wd., mm	No. of Terminals Per Circuit	Current Per Circuit, A	For Wire Gauge	Includes	Choose a Color		Each		Each		Each		Each		Each
300V AC/300V DC
5	2	15	28-12	Marker Card Holder	Blue, Gray	00000000	00000	00000000	00000	00000000	00000	00000000	00000	00000000	00000
600V AC/600V DC
6	2	20	28-12	Marker Card Holder	Blue, Gray	00000000	0000	00000000	0000	00000000	0000	00000000	0000	00000000	0000

Terminal Blocks—Three Circuits with Spring-Clamp Terminals

Three Circuits

Terminal Blocks								End Covers		End Stops		Adjacent Jumpers		Alternate Jumpers
Wd., mm	No. of Terminals Per Circuit	Current Per Circuit, A	For Wire Gauge	Includes	Choose a Color		Each		Each		Each		Each		Each
300V AC/300V DC
5	2	15	28-12	Marker Card Holder	Blue, Gray	00000000	000000	00000000	00000	00000000	00000	00000000	00000	00000000	00000

Grounding Terminal Blocks—One Circuit with Spring-Clamp Terminals

One-Circuit
Grounding Block
with Two Terminals

Terminal Blocks						End Covers		End Stops		Adjacent Jumpers
Wd., mm	No. of Terminals Per Circuit	For Wire Gauge	Color		Each		Each		Each		Each
4.2	2	22-14	Green/Yellow	00000000	00000	00000000	00000	00000000	00000	000000	00
4.2	3	22-14	Green/Yellow	00000000	0000	00000000	0000	00000000	0000	000000	00
4.2	4	22-14	Green/Yellow	00000000	0000	00000000	0000	00000000	0000	000000	00
5	2	28-12	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	00000
5	3	28-12	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	0000
5	4	28-12	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	0000
6	2	28-12	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	0000
6	3	28-12	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	0000
6	4	28-12	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	0000
8	2	24-10	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	0000
8	3	24-10	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	0000
10	2	24-8	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	0000
10	3	24-8	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	0000
12	2	24-6	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	0000
12	3	24-6	Green/Yellow	0000000	00000	00000000	0000	00000000	0000	00000000	0000
16	2	8-2	Green/Yellow	0000000	00000	000000	00	00000000	0000	000000	00
25	2	4-4/0	Green/Yellow	00000000	00000	000000	00	00000000	0000	000000	00

Grounding Terminal Blocks—Two Circuits with Spring-Clamp Terminals

Two-Circuit Grounding Block

Terminal Blocks							End Covers		End Stops		Adjacent Jumpers
Wd., mm	No. of Terminals Per Circuit	For Wire Gauge	Includes	Color		Each		Each		Each		Each
5	2	28-12	Marker Card Holder	Green/Yellow	00000000	000000	00000000	00000	00000000	00000	00000000	00000

Terminal Blocks with Disconnect Tab—One Circuit with Spring-Clamp Terminals

One Circuit with
Disconnect
Tab

Terminal Blocks							End Covers		End Stops		Adjacent Jumpers		Alternate Jumpers
Wd., mm	No. of Terminals Per Circuit	Current Per Circuit, A	For Wire Gauge	Color		Each		Each		Each		Each		Each
600V AC/600V DC
5	2	15	28-12	Gray	00000000	00000	00000000	00000	00000000	00000	00000000	00000	00000000	00000
8	2	30	24-10	Gray	00000000	00000	00000000	0000	00000000	0000	00000000	0000	00000000	0000

Marker Cards

Blank

Blank
For Terminal Block Wd., mm	Number Range	Markers Per Card		Each
4.2	__	100	00000000	00000
5, 6, 8, 10, 12, 16, 25	__	100	00000000	0000
Numbered—For Horizontal Rail
4.2	1-50	100	00000000	0000
5, 6, 8, 10, 12, 16, 25	1-50	100	00000000	0000
Numbered—For Vertical Rail
4.2	1-50	100	00000000	00000
5, 6, 8, 10, 12, 16, 25	1-50	100	00000000	00000

Connector-Compatible Modular DIN-Rail Mount Terminal Blocks

One of the connections on these terminal blocks is a socket instead of a traditional terminal, making it easy to swap out equipment or change your wiring even in small enclosures. Instead of having to attach wire inside the tight space of your enclosure, you can wire a connector (sold separately) wherever it’s easiest and then plug it into the socket. For more permanent connections, these blocks also have spring-clamp terminals. You’ll need a slotted screwdriver to release the spring clamp that holds the wire in place. Add as many circuits as you need with these blocks and accessories. They mount side-by-side on DIN 3 rail.

All blocks are rated UL 94 V-0, so they meet flammability standards.

Grounding terminal blocks facilitate grounding circuits by electrically connecting wires to DIN rail. They shouldn’t be used for applications other than grounding.

End covers fit on the open side of a block to prevent accidental contact with a live circuit.

End stops mount at the end of a group of blocks to keep them in place.

Jumpers connect circuits between blocks to simplify wiring and leave terminals available to connect equipment. These jumpers are lateral jumpers, so they connect to blocks in place of wire or in addition to a wire at the terminal connection points.

Marker cards fit into built-in label holders on the blocks.

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

Terminal Blocks—One Circuit with Spring-Clamp Terminals

Terminal Block

End Stop

End Cover

Jumper

									End Stops
Terminal Blocks							End Covers			Each		Jumpers
Wd., mm	Ht., mm	For Wire Gauge	Color	Specifications Met		Each		Each		1-24	25-Up		Each
300V AC/300V DC—10A Per Circuit
Socket
3.5	48.5	24-16	Blue	UL Recognized Component, CSA Certified, UL 94 V-0	0000000	00000	00000000	00000	00000000	00000	00000	00000000	00000
3.5	48.5	24-16	Gray	UL Recognized Component, CSA Certified, UL 94 V-0	0000000	0000	00000000	0000	00000000	0000	0000	00000000	000
3.5	58.2	24-16	Blue	UL Recognized Component, CSA Certified, UL 94 V-0	0000000	0000	00000000	0000	00000000	0000	0000	00000000	000
3.5	58.2	24-16	Gray	UL Recognized Component, CSA Certified, UL 94 V-0	0000000	0000	00000000	0000	00000000	0000	0000	00000000	000
3.5	85.25	24-16	Blue	UL Recognized Component, CSA Certified, UL 94 V-0	0000000	0000	00000000	0000	00000000	0000	0000	00000000	000
3.5	85.25	24-16	Gray	UL Recognized Component, CSA Certified, UL 94 V-0	0000000	0000	00000000	0000	00000000	0000	0000	00000000	000

Grounding Terminal Blocks—One Circuit with Spring-Clamp Terminals

Grounding Terminal Block

End Cover

End Stop

Jumper

									End Stops
Terminal Blocks							End Covers			Each		Jumpers
Wd., mm	Ht., mm	For Wire Gauge	Color	Specifications Met		Each		Each		1-24	25-Up		Each
Socket
3.5	50.8	24-16	Green/Yellow	UL Recognized Component, CSA Certified, UL 94 V-0	0000000	00000	00000000	00000	00000000	00000	00000	00000000	00000
3.5	61.8	24-16	Green/Yellow	UL Recognized Component, CSA Certified, UL 94 V-0	0000000	0000	00000000	0000	00000000	0000	0000	00000000	000
3.5	85.25	24-16	Green/Yellow	UL Recognized Component, CSA Certified, UL 94 V-0	0000000	0000	00000000	0000	00000000	0000	0000	00000000	000

Connectors

Connector

Plug
Number of Terminals Per Circuit	Number of Circuits	For Wire Gauge	Wire Connection Type	Color		Each
1	1	24-16	Spring-Clamp Terminals	Gray	00000000	00000
2	2	24-16	Spring-Clamp Terminals	Gray	00000000	0000

Marker Cards

Marker Card

Blank
For Terminal Block Width, mm	Markers Per Card		Each
3.5	100	00000000	00000

Modular DIN-Rail Mount Terminal Blocks with LED Status Indicator

Visually confirm your circuits are working as expected. These terminal blocks have integrated LEDs that indicate if your circuits are powered or not, helping you troubleshoot issues. They're commonly used with sensors and actuators to communicate their status. You can add as many circuits as you need with these terminal blocks and accessories; they mount side-by-side on DIN 3 rail. They’re ideal for processing plants and on conveyor lines because they make it easy to organize multiple sensors and actuators. Once you’ve wired the first block in the series to a power supply, jumpers (sold separately) power each connected block. The other terminals on each block connect your PLC or data logger to the signal wire of your sensor or actuator.

When wiring these blocks, there’s no need to tighten or loosen any screws thanks to their spring-clamp terminals. Insert a slotted screwdriver to release the spring clamp and then push your wire in to lock it into place.

Rated UL 94 V-0, all meet flammability standards.

Blocks for PNP signal output illuminate when sensors are sending a high signal.

Blocks for NPN signal output illuminate when sensors are sending a low signal.

End covers fit on the open side of a block to prevent accidental contact with a live circuit.

End stops mount at the end of a group of blocks to keep them in place.

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

Terminal Blocks—Four Circuits with Spring-Clamp Terminals

Terminal Block

End Stop

Jumper

End Cover

									End Stops
Terminal Blocks							End Covers			Each		Jumpers
Wd., mm	Ht., mm	For Wire Gauge	Color	Specifications Met		Each		Each		1-24	25-Up		Each
For PNP Signal Output Type
24V AC/24V DC—10A Per Circuit
7	81.1	24-16	Gray	UL Recognized Component, C-UL Recognized Component, CSA Certified, UL 94 V-0	0000000	000000	00000000	00000	00000000	00000	00000	00000000	00000
For NPN Signal Output Type
24V AC/24V DC—10A Per Circuit
7	81.1	24-16	Gray	UL Recognized Component, C-UL Recognized Component, CSA Certified, UL 94 V-0	0000000	00000	00000000	0000	00000000	0000	0000	00000000	000

Marker Cards

Marker Card

Blank
For Terminal Block Width, mm	Markers Per Card		Each
3.5	100	00000000	00000

Marker Card Holders

Card Holder

Color		Each
Gray	00000000	00000