GLOBAL
About A&J
Manufacturer · Changshu, Jiangsu

Laminated Busbar Manufacturer & Factory

We design and build custom multilayer busbars in-house — for traction, renewable energy, converters and data-center power. Drawn, laminated, welded and tested under one roof.
No obligation · NDA on request · Factory audit welcome
Rated voltage
400–6500 V
Rated current
80–2000 A
Operating temperature
−40 to +130 °C
Design lead experience
16 years
Electrical test
100% of units
Conductor: copper / aluminum · CTI Grade II · Insulation: PET, PI, epoxy powder
01

A Laminated Busbar Manufacturer, Not a Trading Company

Cutting, laminating, welding and testing all happen on our own line. There is no intermediary between your drawing and the person who builds it — which is why questions come back answered, not forwarded.
As a laminated busbar manufacturer with our own line, that difference shows up in three places: how fast a design question is answered, who owns a problem when one appears, and whether you can come and look for yourself. And because we are a laminated busbar factory rather than a trading office, you can check that in person.
NDA & IP protection
Signed before drawings are shared.
Engineering support
You talk to an engineer, not an account manager.
Prototyping
Small quantities accepted while the design settles.
Audit welcome
Visit the line, or send your auditor.
02

From Insulation Materials to Global Power Interconnection

As a China laminated busbar manufacturer, we did not start with busbars. We started with the insulating materials that go inside them — then added the busbar line, and now serves customers in the U.S. and Europe.
2017
Company establishment
PP and PC insulation materials — the starting point of the business.
2019
Strategic expansion
Three new production lines, and first entry into the automotive industry.
2020
Exponential growth
Annual sales passed RMB 10 million.
2021
The busbar line
Busbar project and manufacturing line established, alongside the insulation products.
2024
A standalone company
A&J Link Technology (Suzhou) launched to focus entirely on laminated busbars.
2025
Into the U.S. and Europe
Presence strengthened in the U.S. and European markets.
Material knowledge first, then the line, then the market — which is why the insulation layer is something we control rather than buy.
03

In-House Manufacturing, End to End

Six steps of busbar manufacturing, all under one roof. Each one affects the ones after it — which is the argument for keeping them together.
New to the part itself? Our laminated busbar overview covers the structure and how the layers are stacked.
01
Laser cutting
Complex conductor profiles cut to the drawing, with edges clean enough to insulate reliably.
02
Stamping and forming
High-volume blanks and 3D forming of the conductor shape before lamination.
03
Vacuum hot-press lamination
Layers and insulation film bonded under heat and pressure into one void-free part.
04
Welding and brazing
Terminations joined with a defined process, so contact resistance stays where the design put it.
05
Surface plating
Tin, nickel or silver — chosen for the joint and the environment rather than as a default.
06
100% electrical test
Every unit, not a sample. See section 06 for what is measured.
04

Our Equipment

Across our laminated busbar factory, the critical steps of production run on our own machines. What matters is not the badge on the side — it is what each machine makes possible.

Lamination Machine

Precision inserting machine

Laser cutting

Servo bending

Die-cutting & film plotting

HV Tester

You are welcome to audit the line — we will walk you through it.
05

Engineering Support, Before You Commit to Tooling

The most expensive mistake in a busbar project is discovering a manufacturability problem after the die is cut. That is what this team exists to prevent.
TECHNICAL LEAD
16 years
Busbar design — layer stack, inductance and current distribution.
What this means for you: the stack is designed for your switching behaviour, not chosen from a catalogue.
MANUFACTURING LEAD
12 years
Busbar manufacturing — lamination, tooling and yield.
What this means for you: the design you approve is the design we can actually build.
ENGINEERING SUPPORT
DFM review
Drawing review for manufacturability before tooling is ordered.
What this means for you: you hear about the risk before it costs you money.
06

Quality Control You Can Verify

We would rather show what is measured than claim a defect rate. Below is what we check, on which machine, and what the result confirms.
TestEquipmentWhat it confirms
Dielectric withstand (Hi-Pot)HV testerThe insulation holds the specified voltage without breakdown.
DimensionalThree-coordinate measuringHole positions, spacing and overall geometry match the drawing.
Insulation layerFilm plotting / die-cuttingEach layer's insulation is cut to the right pattern before lamination.
Electrical test, 100%HV testerEvery unit is tested before packing — not a batch sample.
Ask for the test record of your batch.
The values travel with the shipment, so you can see how close each part ran to its limit — not just that it passed.
07

From Enquiry to Production

As a custom laminated busbar manufacturer, we work in four steps — and you can stop at any of them. Nothing is tooled until you have seen the DFM feedback.
STEP 1
Enquiry & review
Drawing or description in; feasibility and open questions out.
STEP 2
DFM & design
Layer stack, tolerances and tooling approach agreed before anything is cut.
STEP 3
Prototype
Small quantity, tested, so the design is proven before volume.
STEP 4
Series
Repeat production with a test record per batch.
08

Where They Are Used

As a laminated busbar supplier, four application families account for most of our work, with two more growing quickly.
High-speed railway
Traction converters and auxiliary power.
Green energy
PV string inverters and wind converters.
Industrial converters
VFDs, rectifiers and servo systems.
Communications & servers
Data-center power distribution and server racks.
Electric vehicles
Traction inverters and battery packs.
Energy storage
BESS rack interconnects and PCS links.
09

Frequently Asked Questions

Are you a manufacturer or a trading company?
A manufacturer. Cutting, lamination, welding, plating and testing are done in our own plant in Changshu, Jiangsu.
Can you make custom laminated busbars?
Yes — layer count, conductor material, geometry, terminals and plating are built to your drawing. Prototypes are accepted while the design is still moving.
What conductor materials and insulation do you use?
Copper or aluminum conductors, with PET or PI film insulation and optional epoxy powder coating. Rated voltage runs from 400 V to 6500 V, current from 80 A to 2000 A, and the CTI grade is II.
Do you sign NDAs?
Yes — on request, before drawings are shared.
Do you support factory audits and visits?
Yes. We are in Changshu, Jiangsu, and you or your third-party auditor are welcome. Ask in advance so we can arrange the line to be running.
Evaluate Us as Your Busbar Manufacturer
Send a drawing or describe the duty. You get a feasibility note and DFM feedback — before any tooling is discussed.
STEP 1
You send a drawing, or describe the duty.
STEP 2
An engineer reviews feasibility and flags risks.
STEP 3
You get a design note, then a quote.
No obligation · NDA on request · Factory audit welcome
 

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