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Terminal Blocks & Connectors

Electrical and electronic systems heavily depend on terminal blocks and connectors. They are the vital interfaces in the systems for connecting wires and securing stable electrical connections. These components not only provide the requisite interfaces that allow electric current to flow from one part of a system to another but also perform an important organizing and management function. Terminal blocks, found in junction boxes and switchboards, are necessary for safeguarding and working with wires throughout a building or an item of equipment.

Different terminal blocks are designed to serve different purposes. For instance, there are terminal blocks that screw down onto the two or more wires for a firm, secure connection. There is another type that doesn't use a separate tool to clamp down on incoming wires. It uses a push-in mechanism along with a small, determined amount of spring tension. And then there are still other types that use a wire-plug method. These types vary depending on the application and on whether secure connections, quick connections, or tool-free connections are needed. There are also pluggable terminal blocks and modular terminal blocks.

There are several kinds of connectors, like plug and socket connectors, crimp connectors, and insulation displacement connectors. Commonly plug and socket connectors are used to connect and disconnect often, like when we use earphones on our phones or when we connect earbuds to any kind of device. Crimp connectors form a secure and permanent connection and are used in the automotive and aerospace industries.

Found 5464 items
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Found 5464 items
Manufacturer
IDEC (35)
Phoenix Contact (4305)
Schneider Electric (226)
Weidmuller (898)
Component
Blown Fuse Indicator (2)
Box Connector (8)
Box Lug Connector (15)
Cover (1)
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End Plate (7)
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Sub Component
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Bolt Connection Terminal Block (112)
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Component Terminal Block (101)
Control Voltage Distribution (63)
Device Terminal Block (1)
Disconnect Terminal Block (260)
Distance Terminal (1)
Distributor Terminal Block (1074)
Double-Level Spring-Cage Terminal Block (19)
Terminal Block Component Color
Agate Gray (4)
Beige (12)
Beige/Yellow (22)
Black (705)
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Black/Yellow (118)
Blue (661)
Blue/Black (1)
Blue/White (2)
Brown (122)
Terminal Block Number of Levels
1 (3095)
16 (4)
2 (556)
3 (168)
4 (29)
8 (13)
Jumper Pitch
0 mm (5)
12 mm (1)
12.4 mm (2)
15.1 mm (1)
17 mm (1)
19 mm (2)
24 mm (1)
24.7 mm (2)
31 mm (1)
32 mm (1)
Terminal Block Voltage Rating
1000 Volt (518)
110 Volt (1)
115 Volt (1)
12 Volt (4)
120 Volt (2)
150 Volt (14)
1500 Volt (34)
160 Volt (15)
176 Volt (2)
200 Volt (112)
Terminal Block Amperage
.05 Amp (2)
.5 Amp (48)
1 Amp (13)
1.5 Amp (9)
10 Amp (108)
10 Mamp (1)
100 Amp (1)
101 Amp (14)
110 Amp (3)
12 Amp (19)
Terminal Block Width
10 mm (18)
10 mm (13)
10.1 mm (2)
10.2 mm (105)
10.3 mm (5)
10.4 mm (38)
10.5 mm (1)
10.53 mm (1)
100 mm (5)
101.5 mm (2)
Terminal Block Number of Connections
1 (171)
10 (41)
11 (14)
12 (181)
128 (4)
13 (168)
14 (16)
15 (8)
16 (43)
18 (167)
Jumper Number of Positions
1 (14)
10 (1)
11 (1)
13 (1)
14 (1)
15 (1)
2 (21)
3 (2)
4 (19)
5 (2)
Length of the Connecting Thread
1 (8)
Terminal Block Max Wire Size
1 (1)
1/0 AWG (1)
10 (713)
10 AWG (4)
12 (1095)
14 (393)
14 AWG (3)
16 (82)
16 AWG (1)
18 (2)
Terminal Block Min Wire Size
1 (1)
10 (4)
12 (23)
14 (6)
16 (38)
18 (21)
2 (10)
20 (179)
22 (1)
24 (803)
Terminal Block Connection Method
Bolt Connection (103)
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Fast Connection (7)
Front Screw Connection (18)
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Plug Connection (140)
Power-Turn Connection (61)
Push X Connection (3)
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Push-In Spring Connection (90)
Terminal Block Diode
With Diode (48)
Terminal Block Disconnect
Knife Disconnect (173)
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Removable Disconnect (124)
Terminal Block Fuse Type
.25" X 1.24" (1)
10:3 X 38 mm (4)
3 X 32 (22)
5Mm X 20Mm (9)
C (9)
Class CC (8)
D 01 - E 14 (1)
D 02 - E 18 (1)
D II - E 27 (1)
G - 5 X 20 (78)
Terminal Block Fused
Fused (188)
Not Fused (2685)
Terminal Block Grounded
Grounded (309)
Not Grounded (2583)
Test Plug Terminal Block (8)
Terminal Block High-current
High-Current Terminal Block (122)
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120V LED Indicator (11)
12V LED Indicator (13)
230V LED Indicator (11)
24V LED Indicator (26)
48V LED Indicator (11)
LED (70)
LED Indicator (1)
No Indicator (2853)
Terminal Block With Test Disconnects
With Test Disconnects (3)
With Test Socket Screws (79)
Normally In Stock
Phoenix Contact 3044128 Protective conductor terminal block UT 4-PE
Free U.S Ground shipping
$5.26
$4.38
Normally In Stock
Phoenix Contact 3044102 Feed-through terminal block UT 4
Free U.S Ground shipping
$1.40
$1.17
Normally In Stock
Phoenix Contact 3045130 Feed-through terminal block UT 4 WH
Free U.S Ground shipping
$1.56
$1.30
Normally In Stock
Phoenix Contact 3045143 Feed-through terminal block UT 4 BK
Free U.S Ground shipping
$1.46
$1.22
Normally In Stock
Phoenix Contact 0921037 Fuse plug ST-SILED 24-UK 4
Free U.S Ground shipping
$22.19
$18.49
Normally In Stock
Phoenix Contact 3046090 Fuse modular terminal block UT 4-HESILED 24 (5X20)
Free U.S Ground shipping
$11.74
$9.78
Normally In Stock
Phoenix Contact 3046100 Fuse modular terminal block UT 4-HESILA 250 (5X20)
Free U.S Ground shipping
$12.01
$10.01
Normally In Stock
Phoenix Contact 3044115 Feed-through terminal block UT 4 BU
Free U.S Ground shipping
$1.40
$1.17
Normally In Stock
Phoenix Contact 3118203 Fuse modular terminal block UK 6-FSI/C
Free U.S Ground shipping
$14.62
$12.18
Normally In Stock
Phoenix Contact 3044597 Protective conductor terminal block UT 4-QUATTRO-PE
Free U.S Ground shipping
$8.16
$6.80
Normally In Stock
Phoenix Contact 3214368 Fuse modular terminal block UT 4-L/HESILA 250 (5X20)
Free U.S Ground shipping
$15.35
$12.79
Normally In Stock
Phoenix Contact 3044076 Feed-through terminal block UT 2,5
Free U.S Ground shipping
$1.31
$1.09
Normally In Stock
Phoenix Contact 3045127 Feed-through terminal block UT 4 RD
Free U.S Ground shipping
$1.46
$1.22
Normally In Stock
Phoenix Contact 3044814 Double-level terminal block UTTB 4
Free U.S Ground shipping
$3.68
$3.07
Normally In Stock
Phoenix Contact 3044131 Feed-through terminal block UT 6
Free U.S Ground shipping
$1.86
$1.55
Normally In Stock
Phoenix Contact 3045224 Feed-through terminal block UT 4 BN
Free U.S Ground shipping
$1.46
$1.22
Normally In Stock
Phoenix Contact 3046032 Fuse modular terminal block UT 4-HESI (5X20)
Free U.S Ground shipping
$7.28
$6.07
Normally In Stock
Phoenix Contact 3011054 Initiator/actuator terminal block DOKD 1,5-TG
Free U.S Ground shipping
$15.96
$13.30
Normally In Stock
Phoenix Contact 3209510 Feed-through terminal block PT 2,5
Free U.S Ground shipping
$1.92
$1.60
Normally In Stock
Phoenix Contact 3214325 Fuse modular terminal block UT 4-L/HESI (5X20)
Free U.S Ground shipping
$10.96
$9.13
Normally In Stock
Phoenix Contact 3044157 Protective conductor terminal block UT 6-PE
Free U.S Ground shipping
$6.01
$5.01
Normally In Stock
Phoenix Contact 3044636 Double-level terminal block UTTB 2,5
Free U.S Ground shipping
$3.59
$2.99
Normally In Stock
Phoenix Contact 3046278 Knife-disconnect terminal block UT 4-MT BU
Free U.S Ground shipping
$4.74
$3.95
Normally In Stock
Phoenix Contact 3044144 Feed-through terminal block UT 6 BU
Free U.S Ground shipping
$1.86
$1.55
Normally In Stock
Phoenix Contact 3044720 Disconnect terminal block UTTB 4-TG
Free U.S Ground shipping
$7.27
$6.06
Normally In Stock
Phoenix Contact 3214259 Multi-level terminal block UT 2,5-3L
Free U.S Ground shipping
$6.59
$5.49
Normally In Stock
Phoenix Contact 3046184 Feed-through terminal block UT 4-MTD
Free U.S Ground shipping
$1.50
$1.25
Normally In Stock
Phoenix Contact 3046430 Fuse modular terminal block UT 6-HESILA 250 (6,3X32)
Free U.S Ground shipping
$17.27
$14.39
Normally In Stock
Phoenix Contact 0921053 Fuse plug ST-SILA250-UK 4
Free U.S Ground shipping
$16.24
$13.53
Normally In Stock
Phoenix Contact 3036819 Fuse plug P-FU 5X20 LED 24
Free U.S Ground shipping
$14.28
$11.90
Normally In Stock
Phoenix Contact 0921011 Fuse plug ST-SI-UK 4
Free U.S Ground shipping
$5.94
$4.95
Normally In Stock
Phoenix Contact 3044092 Protective conductor terminal block UT 2,5-PE
Free U.S Ground shipping
$4.76
$3.97
Normally In Stock
Phoenix Contact 3045062 Feed-through terminal block UT 2,5 RD
Free U.S Ground shipping
$1.37
$1.14
Normally In Stock
Phoenix Contact 3044160 Feed-through terminal block UT 10
Free U.S Ground shipping
$2.62
$2.18
Normally In Stock
Phoenix Contact 3270541 Service connector LPS-6
Free U.S Ground shipping
$11.65
$9.71
Normally In Stock
Phoenix Contact 3045156 Feed-through terminal block UT 4 GN
Free U.S Ground shipping
$1.46
$1.22
Normally In Stock
Phoenix Contact 3044571 Feed-through terminal block UT 4-QUATTRO
Free U.S Ground shipping
$2.86
$2.38
Normally In Stock
Phoenix Contact 2774237 Initiator/actuator terminal block DIKD 1,5-TG
Free U.S Ground shipping
$14.93
$12.44
Normally In Stock
Phoenix Contact 3045198 Feed-through terminal block UT 6 WH
Free U.S Ground shipping
$1.98
$1.65
Normally In Stock
Phoenix Contact 3045208 Feed-through terminal block UT 6 BK
Free U.S Ground shipping
$1.98
$1.65
Normally In Stock
Phoenix Contact 3209578 Feed-through terminal block PT 2,5-QUATTRO
Free U.S Ground shipping
$3.13
$2.61
Normally In Stock
Phoenix Contact 3044775 Knife-disconnect terminal block UTTB 4-MT
Free U.S Ground shipping
$9.19
$7.66
Normally In Stock
Phoenix Contact 3045088 Feed-through terminal block UT 2,5 BK
Free U.S Ground shipping
$1.37
$1.14
Normally In Stock
Phoenix Contact 3045075 Feed-through terminal block UT 2,5 WH
Free U.S Ground shipping
$1.37
$1.14
Normally In Stock
Phoenix Contact 3004171 Fuse modular terminal block UK 6,3-HESI
Free U.S Ground shipping
$17.40
$14.50

FAQs

What terminal block type requires terminal block connectors?

Pluggable terminal blocks require terminal block connectors, as they consist of separable male and female parts that allow for easy connection and disconnection.

What are barrier strips used for?

Barrier strips are used for organizing and securing multiple electrical connections, providing a clear and safe separation between terminals to prevent short circuits and improve wiring management.

Terminal Block Basics

Single Level Pass Through Terminal Blocks

Single Level Pass Through Terminal Blocks are used to connect two wires together with a common junction point. This is helpful when a component needs to be disconnected or isolated within a circuit. These are the most common types of terminal blocks in industrial applications. 

Ground Terminal Blocks

Ground Terminal Blocks function almost exactly like most pass through terminal blocks with one exception: they are grounded. These terminal blocks have a metal connection from where the wire is terminated, all the way to the bottom of the block where it will clamp into the panel. This allows for an electrical circuit to be grounded without running a wire to the main ground connection on a breaker or surge protector. 

Fuse Terminal Blocks

Fuse Terminals function almost exactly like most pass through terminal blocks with one exception: the presence of a fuse. This fuse provides protection for components from too much voltage or current.

Multilevel Terminal Blocks

Multilevel Terminal Blocks are used to connect two wires together with a common junction point, just like single pass though terminal blocks, but with the advantage of making two electrical connections in the same block. These blocks also incorporate fuses and can be grounded.

Disconnect Terminal Blocks

Disconnect Terminal Blocks are similar to fused blocks, however the disconnect stops the flow of electricity by lifting a lever on the terminal block. Unlike fuse blocks, they are a more permanent solution, but will not provide any protection in the event of a power surge.