Description
TB-1504 Fixed Barrier Terminal Block (15A / 600V) 4-Pin
Product Overview
The TB-1504 Fixed Barrier Terminal Block is a heavy-duty, dual-row electrical connector designed to provide a secure, high-voltage junction for power distribution, circuit isolation, and industrial field wiring. Featuring 4 fully isolated screw positions, this fixed-mount terminal strip employs rigid plastic barrier walls to physically separate connections, preventing electrical shorts, arc-overs, and accidental cross-contact from stray wire strands across all four lines.
This model is built to handle up to 15A at 600V, making it an ideal choice for multi-rail DC power systems, multi-phase configurations, or quad-channel control paths. It comes complete with a clear, snap-on plastic safety cover that shields the live terminals from environmental dust, moisture, and accidental contact while allowing for instant visual inspection of the underlying connections.
Key Features
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Heavy-Duty Power Rating: Engineered to safely manage demanding electrical demands up to 15A and 600V, making it highly reliable for both low-voltage DC arrays and high-voltage AC circuits.
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High-Dielectric Barrier Insulation: Molded plastic partition walls isolate the 4 terminal screws, maximizing creepage distance between poles to maintain circuit integrity in high-vibration environments.
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Clear Protective Safety Cover: A transparent, flame-retardant top shield clips firmly onto the housing, providing essential touch-safe protection without obscuring terminal wiring or marking strips.
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High-Torque Screw Terminals: Rugged binder screws paired with integrated flat-bottom pressure plates ensure a high-pressure grip on connections without severing fine copper wire strands.
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Flanged Surface Mount Base: Designed with pre-drilled mounting holes on the outer flanges of the robust housing, allowing for rapid, secure screw-down placement onto chassis plates, panels, or project enclosures.
Technical Specifications
| Parameter | Specification |
| Model / Series | TB-1504 |
| Component Type | Dual-Row Fixed Barrier Terminal Strip |
| Number of Positions (Poles) | 4 Pins |
| Terminal Mounting Type | Surface / Panel Mount (Flanged Screw Holes) |
| Termination Style | Screw Clamp with Pressure Plate |
| Material (Base Housing) | High-Strength, Flame-Retardant Polycarbonate / PBT (UL 94V-0) |
| Material (Cover) | Transparent PVC / Polycarbonate |
| Material (Contacts & Screws) | Zinc-Plated Steel / Brass |
| Rated Voltage | 600V Max |
| Rated Current | 15A Max |
| Wire Gauge Compatibility | 14 AWG to 22 AWG (Solid or Stranded) |
Applications
The industry standard for clean, low-profile power distribution, stepper motor connections, and control circuit junctions:
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DC Power & Step Driver Distribution: Ideal for clean distribution of multi-rail DC layouts, such as organizing $V+$, $V-$, and corresponding control paths in automated electronics.
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Stepper Motor & Actuator Interfaces: Perfect for routing standard 4-wire bipolar stepper motor leads ($A+$, $A-$, $B+$, $B-$) cleanly from driver boards to internal enclosure chassis links.
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Power Supply Outputs: Serving as the primary quick-access output terminal interface for multi-rail enclosed power supplies, transformers, and industrial distribution blocks.
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Industrial Automation Enclosures: Providing a neat, vibration-resistant terminal junction for field wiring running to programmable logic controllers, industrial relays, and contactor nodes.

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