COMPONENT
Yitong ultrathin PV busbar
Yitong Tech ↗Thin copper busbar with a light Sn60Pb40 coating. Get Yitong's section drawing first, then qualify feeding and the module joint.
Drawn from Yitong's busbar page and one-page data sheet. They leave out the dimension axes, a current capacity and a qualified module stack.
General illustration of module assembly equipment, not a photograph of this model. Ask the manufacturer for current photographs and layout drawings of the configuration offered.
START WITH YOUR PRODUCTION TASK
Get a clear section drawing, agree coating and spool, then qualify feeding and the real module connection on your line.
SOURCE-LINKED DATA
Published specifications
Values below are published by the manufacturer, each with the date its source was checked. Ask for the figures that apply to your configuration and material in the quotation.
The manufacturer has not published a complete specification table for this entry. Request the delivered material specification, drawing where applicable and lot acceptance requirements.
01 · PVYard procurement analysis
Ask for a drawing to read the size rows
The data sheet labels one row “Type Specification” at ≤50 mm and another “Substrate size” at ≥0.03 mm. Neither row says which axis it describes, so width, bare thickness and coated thickness cannot be read off with confidence. Read the labels as Yitong prints them; the sheet gives no confirmed 50 mm width.
Ask Yitong for a cross-section drawing that assigns each limit to width, substrate thickness or total coated thickness. The word ultrathin says nothing about current rating. Current, joint layout and heat behaviour have to come from your module design and agreed tests.
02 · Manufacturer information
Busbar material and mechanical values
| Parameter | Yitong value | Buyer note |
|---|---|---|
| Copper substrate content | ≥99.95% | Request lot composition records. |
| Substrate resistivity | ≤0.01724 Ω·mm²/m | Figure for the bare copper. |
| Coating / fusion point | Sn60Pb40 / 186°C | The flat ribbon sheet lists 189°C; keep them apart. |
| Single-sided coating | 5±2 µm | Far thinner than the flat ribbon's 20±5 µm. |
| Thickness tolerance | ±0.002 mm | The drawing must say which thickness it applies to. |
| Width tolerance | ±0.05 mm | Confirm the width you are ordering. |
| Elongation / tensile strength | ≥10% / ≥100 MPa | Lower than the flat ribbon limits. |
| Sickle bending | ≤0.3% | Ask for the inspection reference length. |
| Ribbon resistivity | ≤0.023 Ω·mm²/m | Allowable current needs a design calculation and tests. |
03 · PVYard procurement analysis
Handling a thin section
Edges and winding
Set limits for edge damage, winding alignment and surface condition with Yitong. The sheet warns against scratches and dirt but gives no numeric edge-defect limit.
Feeding and stiffness
Check guide shape, unwinding and tension against the real section. Elongation and tensile rows say little about bending stiffness or wrinkle-free feeding.
Joint and circuit design
Specify lap geometry, solder materials and the module circuit. Agree joint strength, electrical and thermal checks, and work out current capacity from tests rather than from the resistivity row alone. Where the busbar leads out to the box, check its exit position against the box drawing; Yitong also makes a split junction box.
Sources: Ultrathin busbar product pageUltrathin busbar data sheet (PDF)
04 · Manufacturer information
Busbar spool and storage
| Item | Yitong statement | Question for the quote |
|---|---|---|
| Spool | Φ152–122–Φ20 (φ16) mm; 6 kg | Spool drawing, adapter and wound length. |
| Storage temperature | 5–35°C | Rules for sealed and opened packs. |
| Relative humidity | ≤60% | Log the real warehouse conditions. |
| Declared period | 6 months | Start date and how expiry is marked. |
| Handling | Protect from damage and contamination; rewrap after use | Protective packing and spool orientation. |
05 · PVYard procurement analysis
What to put in an ultrathin busbar order
Settle the axes
Attach a controlled drawing with width, substrate and finished thickness, coating and the tolerance basis.
Agree inspections
Set sampling, coating measurement, edge and surface checks and mechanical test methods. Ask for traceable material and lot documents.
Trial the joint
Record winding, unwinding, handling and joining conditions on your intended module design. Judge results by criteria written for this busbar, separate from any ribbon criteria.
Manage changes
Keep accepted samples, the drawing and Yitong's revision level. Review any change in section, copper, coating or winding before the next production run.
06 · PVYard procurement analysis
Ultrathin busbar questions
Is ≤50 mm the width?
The row carries no axis label. Ask for the drawing before you treat the number as an orderable width.
Can I reuse the flat ribbon figures?
No. Coating, tolerances, mechanical limits and spool size all differ between the two sheets. The nearest comparison is Yitong's flat ribbon, which also carries a Sn60Pb40 coating.
Is the busbar lead-free?
No. Its Sn60Pb40 coating contains lead. Ask for a separately documented lead-free option if you need one.
Should I solder at 186°C?
186°C is the fusion point printed on the sheet. Your joining settings come from qualifying the exact material in your process.
TURN THIS INTO A CLEAR REQUEST
Ask about this product
Include the product-specific questions above and replace every bracket with your actual requirement. Save your edited text to your sourcing brief, then review it before submitting an enquiry. Saving a brief does not send it to a manufacturer.
Sources
Manufacturer information and our buying guidance are labelled section by section above. Each source below shows the date it was checked.
Ultrathin busbar product page ↗
Source check: 2026-10-11 · Busbar product page with the data sheet download.
Ultrathin busbar data sheet (PDF) ↗
Source check: 2026-10-11 · Size labels, coating, mechanical rows, spool and storage.
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