Barrier Terminals
Robust barrier terminal blocks with high current capacity and excellent creepage distances. Designed for power applications where safety and reliability are critical.
ISO 9001:2015 Certified
Barrier Terminals
Robust barrier terminal blocks with high current capacity and excellent creepage distances. Designed for power applications where safety and reliability are critical.
Technical Specifications
| Current Rating | 15A to 200A |
| Voltage Rating | 600V |
| Wire Range | 1.5mm² to 95mm² |
| Contact Material | Brass, nickel-plated |
| Housing Material | Phenolic / PA66 (UL94 V-0) |
| Creepage Distance | ≥ 8mm between poles |
| Screw Size | M3 to M8 |
| Mounting | Base mount (2x #6 screws) |
Key Features
- High current capacity up to 200A
- Enhanced creepage and clearance distances
- Barrier walls prevent inter-pole short circuits
- Available in 2 to 24 pole configurations
- Stud-type and screw-type connections
- Base mounting with center or end entry options
- Clear covers available for IP20 protection
- Dual wire entry for daisy-chain installations
Applications
- High-power distribution systems
- Motor starter panels
- Transformer terminations
- UPS and power supply connections
- Generator control panels
- Heavy industrial machinery
Barrier Terminal Blocks
Unison Connectors manufactures heavy-duty barrier terminal blocks designed for high-power applications where safety margins are critical. The distinctive barrier walls between poles provide enhanced protection against short circuits and tracking.
Why Barrier Terminals?
Barrier terminals offer advantages in power applications:
- Physical barriers between poles prevent accidental shorts from loose strands or debris
- Extended creepage distances exceed standard requirements for added safety
- High current capacity handles power circuits that DIN rail terminals cannot
- Robust construction withstands the mechanical stresses of heavy gauge wiring
Construction Details
- Base material - High-grade phenolic resin or reinforced nylon for superior dielectric properties
- Barriers - Integral molded walls with sufficient height to prevent tracking
- Hardware - Nickel-plated brass screws and pressure plates for corrosion resistance
- Markings - Laser-etched pole numbers for permanent identification
Available Configurations
| Series | Poles | Current | Wire Size | Pitch |
|---|---|---|---|---|
| BT-15 | 2-24 | 15A | 1.5-4mm² | 8.25mm |
| BT-30 | 2-16 | 30A | 2.5-10mm² | 9.5mm |
| BT-60 | 2-12 | 60A | 6-25mm² | 12.7mm |
| BT-100 | 2-8 | 100A | 16-50mm² | 16.0mm |
| BT-200 | 2-4 | 200A | 35-95mm² | 22.0mm |
Accessories
- Transparent snap-on covers for finger protection
- Jumper links for common bus connections
- End stackers for panel mounting
- Marker strips for circuit identification