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Molex barrier strips.

Barrier Strips

Designed for field wire terminations, Molex barrier strips include accessible large screws of a captive clamping design for simple job-site terminations to stripped copper wire or for connections to common solderless terminals such as ring lugs.

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Voltage Current Wire Gauge Circuits
Up to 600V 10.0 to 50.0A 18 to 8 AWG (0.75 to 10.00mm² nominal) 2 to 12

Single-Row Barrier Strips

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Molex Single-Row, Dual-Barrier Strip.

Dual-Row Barrier Strips

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Molex Dual-Row, Dual-Barrier Strip.

Features and Benefits

Molex barrier strips are available in three main categories: dual-barrier, tri-barrier, and double-row. Each category of barrier strip is offered in several industry standard pitch (or centerline) spacings, allowing for a selection of choice for high-density circuit count to high-current applications.

Their compact footprints and modular constructions allow for exact circuit counts to maximize space efficiency. Robust materials such as high-performance polymers and corrosion-resistant hardware ensure reliability under load. Versatile termination and mounting styles (panel, DIN rail and PCB) simplify inventory and speed up production.

All versions feature easy-to-access captive clamping screws for ideal job-site termination of bare copper wire. This is possible in combinations of different wire sizes and without severing thinly stranded wire. Other features include nickel-plated screws for superior resistance to corrosion and high-quality tin-plated terminals for optimal electrical performance and reliability.

High-Density and Compact Designs 

Molex provides rugged, compact, high-density options that save space on panel and PCB layouts, packing more functionality into smaller areas and reducing overall system size and part count. Single-row designs are available in dual-wall options for flexible wiring orientation or tri-wall versions that provide an extra wall as a wire stop feature.

Molex Single-Row, Tri-Barrier Strip.

Design Flexibility

Each individual version in the Molex barrier strip series is molded to exact lengths, allowing for specific circuit counts rather than standard, fixed sizes. Dual-wall and tri-wall versions offer printed circuit board wire terminations, and dual-row versions offer panel-mount wire-to-wire terminations.

Molex Single-Row, Tri-Barrier Strip.

Delivers Industrial-Grade Ruggedness 

Engineered to withstand severe conditions, including high vibration, shock and temperature extremes, Molex barrier strips are ideal for rugged applications such as traffic signal devices. They support high-current and high-voltage needs up to 600V, with amperages in the range of 10 to 50.0A. Constructed with robust materials, they use high-performance polyester housings with a glass filling to provide structural integrity and resistance to chemical corrosion.

Molex Dual-Row, Dual-Barrier Strip.

Saves assembly time and labor costs
These barrier strips are designed for tool-free, fast installation and quick, secure termination.

Streamlines setup
A full complement of accessories is available, including solder tabs, jumpers and quick-connects.

Improves safety
Barrier strips offer “dead-front” construction, helping prevent accidental shorts.

Simplifies inventory and field installs
These barrier strips provide wide wire-gauge compatibility, eliminating the need for multiple connector SKUs for different wire sizes.

Enables secure wire retention in high-vibration environments to help prevent terminal backout
The positive wire retention/screw clamp design (vibration-resistant, captive screws) helps reduce rework. Integrated terminal position assurance, with captive-screw or vibration-resistant clamp, is standard; no aftermarket add-on needed.

Supports reliable, high-performance power delivery
Handles higher loads safely (helps prevent overheating, voltage drop and premature electrical failure) in motor, power and control applications.

Documents and Resources

Applications by Industry

Home Energy Storage
Solar and battery storage systems

EV charging devices

Water heaters

Portable power supplies
Test equipment

Power distribution equipment

Power supplies

This is not a definitive list of applications for this product. It represents some of the more common uses.

Frequently Asked Questions

What are barrier strips and what do they do? 

Molex barrier strips are compact, modular barrier terminal blocks that provide secure, serviceable power and signal terminations for PCB and wire-to-wire panel applications.

What current and voltage ratings are available?

Ratings vary by SKU. Select a connector with a rated current and voltage equal to or higher than your operating requirements. See the product datasheet or general market sales drawing for specific values. 

What AWG/conductor sizes are supported? 

Multiple terminal sizes cover a broad wire-gauge range; check the datasheet for the specific AWG ranges and preterminal conductor limits for each part number. 

Can I use stranded, tinned wire and ferrules? 

Yes, many variants are ferrule-friendly and accept stranded/tinned conductors. Use ferrules where recommended to improve reliability. 

What terminal types and mounting styles are available? 

Terminal types include captive clamping screws. Mounting options include PCB type and wire-to-wire panel versions.

Are screws truly captive for safer servicing? 

Yes, the captive clamping screws are designed to trap solid or stranded wire to the screw. This provides a fast and easy wire termination process.

Is the product suitable for harsh environments with high vibration and humidity changes?

Yes, barrier strips are designed to be rugged. The screws are nickel-plated and terminals are 100% tin-plated for ideal resistance to corrosive environments. The clamping screws, when torqued to their prescribed value, offer strong resistance in applications of high vibration.