Pass Through RJ45 Connectors vs Standard Connectors Honest Comparison
Pass-through plugs are sold as the cure for bad crimps. They do solve one real problem - verifying wire order before crimping - but they add costs and failure modes of their own. Here is the balanced picture.
Technical AnshuPass Through PlugCrimping
Watch the full RJ45 crimping guide on video - every step shown live, from stripping the cable to the final tester check
Every crimper has a drawer of cut-off plugs that failed because two wires swapped places invisibly. Pass-through plugs exist to kill exactly that mistake - the wires exit the front, so order is proven before the crimp. Worth it? Depends on your work.
Checking Wire Order in a Pass Through Plug Before Crimping
Pin 1White-Orange
Pin 2Orange
Pin 3White-Green
Pin 4Blue
Pin 5White-Blue
Pin 6Green
Pin 7White-Brown
Pin 8Brown
In a pass-through plug the wires exit the front face, so the colour order can be verified with your eyes before the crimper closes. Standard plugs hide the wire tips inside.
1
How the Two Designs Differ
Standard plug - wires stop inside the plug body. You confirm seating by looking through the clear plastic at the front wall. Cheaper, available everywhere
Pass-through plug - each wire passes through a hole and exits the front. You verify the exact colour order visually before crimping, and the crimper trims the excess flush
Both make the same electrical connection when crimped correctly. Neither is faster. The difference is in how easy it is to get the crimp right
2
Where Pass Through Genuinely Helps
Beginners and anyone whose eyes tire - the order check before crimping removes the number one cause of failed cables
Cat6 work, where thicker 23 AWG conductors are stiffer and harder to hold in formation while inserting
Field repairs under time pressure, where a first-time-right crimp matters more than plug price
3
The Honest Downsides of Pass Through
Costs more per plug, and needs a pass-through crimper with the trimming blade - a standard crimper leaves the wire ends sticking out
If the trim is not flush, leftover wire tips at the front face can short against the port or the next contact over time
The open front exposes conductor ends to air. In damp or outdoor locations this is a corrosion path - standard sealed plugs or proper outdoor terminations are safer there
Not all pass-through plugs fit all cable. Match plug, cable category and conductor size (solid vs stranded contacts) before buying in bulk
4
Where Standard Plugs Are Still the Right Choice
High-volume patch lead production once your technique is consistent - cheaper per unit and one less failure mode
Damp, dusty or outdoor-adjacent locations where the closed front protects the contacts
Any job where you cannot verify the crimper trims truly flush
Honest note: pass-through plugs make crimping easier to verify, not magically reliable. A pass-through plug crimped with untrimmed tails, or on the wrong cable size, fails just like any other. Judge the system - plug plus tool plus cable - not the marketing.
Watch the Full RJ45 Crimping Video
See the crimping technique live on camera - wire order, seating depth and tester reading, exactly as done in this guide.
Can I crimp pass through plugs with my normal crimper?
You can close the crimp, but the wires will stick out of the front untrimmed. You need a pass-through crimper whose blade cuts them flush in the same squeeze, or a flush cutter and great care. Budget for the matched tool.
Are pass through plugs better for Cat6?
Often yes in practice. Cat6 conductors are thicker and stiffer, so holding formation during insertion is harder. Pass-through plugs plus a load bar make correct Cat6 terminations much more repeatable, especially for newer technicians.
Do pass through plugs reduce speed or reliability?
A correctly seated, flush-trimmed pass-through plug performs the same as a standard plug. Reliability problems come from untrimmed tails, moisture at the open front, or mismatched plug and cable sizes - workmanship issues, not the design.
This guide is based on the Technical Anshu RJ45 crimping video • Stuck on any step? Ask in the video comments - you will get a reply there