| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
NTE Electronics, Inc. |
TERMINAL BLOCK BARRIER |
113 |
|
 |
Curtis Industries |
CONN BARRIER STRIP 5CIRC 0.438" |
25 |
|
 |
On-Shore Technology, Inc. |
CONN TERM STRIP 4CIRC 0.394" |
833 |
|
 |
Eaton |
CONN BARRIER STRIP 3CIRC 0.39" |
46 |
|
 |
Woodhead - Molex |
CONN BARRIER STRIP 2CIRC 0.375" |
0 |
|
 |
Curtis Industries |
CONN BARRIER STRP 16CIRC 0.375" |
25 |
|
 |
Curtis Industries |
CONN BARRIER STRIP 6CIRC 0.375" |
25 |
|
 |
Eaton |
CONN BARRIER STRP 12CIRC 0.562" |
28 |
|
 |
TE Connectivity AMP Connectors |
CONN BARRIER STRP 12CIRC 0.438" |
17 |
|
 |
Curtis Industries |
CONN BARRIER STRIP 9CIRC 0.375" |
24 |
|
 |
Woodhead - Molex |
CONN TERM STRIP 12CIRC 0.472" |
279 |
|
 |
PowerStor (Eaton) |
CONN BARRIER STRP 10CIRC 0.375" |
386 |
|
 |
Woodhead - Molex |
CONN BARRIER STRIP 3CIRC 0.375" |
70 |
|
 |
TE Connectivity AMP Connectors |
CONN BARRIER STRIP 4CIRC 0.375" |
0 |
|
 |
Woodhead - Molex |
CONN BARRIER STRP 13CIRC 0.375" |
0 |
|
 |
TE Connectivity AMP Connectors |
CONN TERM STRIP 8CIRC 0.394" |
0 |
|
 |
Woodhead - Molex |
CONN BARRIER STRIP 2CIRC 0.375" |
1289 |
|
 |
TE Connectivity AMP Connectors |
CONN BARRIER STRIP 5CIRC 0.375" |
143 |
|
 |
TE Connectivity AMP Connectors |
CONN BARRIER STRP 16CIRC 0.375" |
89 |
|
 |
Adels-Contact |
CONN TERM STRIP 3POS SCREW |
2688 |
|
Barrier blocks are modular electrical connectors used to securely join two or more wires. They consist of a conductive metal strip housed in an insulating body with screw or spring-based clamping mechanisms. These components play a critical role in industrial electrical systems by enabling reliable signal and power transmission while simplifying maintenance and modifications.
| Type | Functional Features | Application Examples |
|---|---|---|
| Screw-Type Barrier Blocks | Mechanical screw clamping system with high contact force | Industrial control panels, HVAC systems |
| Spring-Type Terminal Blocks | Push-in spring clamping for quick installation | Automation equipment, test benches |
| Barrier Strips with Insulation Displacement | Connects wires without removing insulation | Telecom equipment, field wiring |
| High-Voltage Barrier Blocks | Extended creepage distances and reinforced insulation | Power distribution units, renewable energy systems |
Typical construction includes: - Conductive element (phosphor bronze or brass with tin plating) - Insulating housing (PA66 or PBT thermoplastic) - Clamping mechanism (M3-M5 screws or compression springs) - Mounting flanges for DIN rail or panel mounting - Optional features: test points, marking areas, finger protection
| Parameter | Importance |
|---|---|
| Rated Current (5-300A) | Determines power transmission capacity |
| Withstand Voltage (500V-10kV) | Ensures electrical safety |
| Insulation Resistance (>10^12 ) | Maintains signal integrity |
| Operating Temperature (-60 C to +150 C) | Defines environmental suitability |
| Vibration Resistance (up to 15g) | Guarantees mechanical stability |
Primary industries include: - Industrial automation (PLC cabinets, motor controls) - Energy systems (solar inverters, battery storage) - Transportation (railway control systems) - Building technology (HVAC, emergency lighting) - Test & measurement equipment
| Manufacturer | Representative Product |
|---|---|
| Phoenix Contact | PT 10-2.5/HC series |
| Weidm ller | SAM 41 series |
| ABB | UT 2.5-BK series |
| TE Connectivity | CB series barrier strips |
| Schurter | K1 series with fuse integration |
Key considerations: - Match current/voltage ratings with system requirements - Environmental factors (temperature, vibration) - Wire size compatibility (AWG/metric) - Installation space constraints - Maintenance accessibility - Compliance with standards (IEC 60947-7)
Case Study: In industrial automation control cabinets, Phoenix Contact's PT 10-2.5/HC series provides reliable 24V DC signal connections with tool-free push-in wiring.
Emerging developments: - Miniaturization for compact control systems - Integrated diagnostics and condition monitoring - Increased creepage distances for EV charging infrastructure - Halogen-free materials for improved fire safety - Smart terminal blocks with IoT connectivity