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pv module bypass diode junction box for quarter-cut pv module

New Model PV Module Bypass Diode Solar Junction Box for Quarter-Cut Solar Module 4-Piece Split Solar Panel

PV-TY2xy
**Core Parameters**
Rated voltage DC 1500V, Rated current 20A-30A ,
Compatible with quarter-cut photovoltaic modules,
Equipped with standard MC4 connectors 1500V&43A (plug-unplug lifespan ≥ 100 cycles),
High-power chip-integrated diodes
Rapidly suppresses hot spot effect
**Mechanical Design**
2 Split Type Junction Box for Quarter-Cut Solar PV Module
IP68 Watetproof &UV Resistance
Qualified through thermal cycling tests (-40℃ to 85℃)
Ensuring a 25-year outdoor lifespan
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   Topology Diagram   
Topology diagram for quarter-cut pv module
   Model No.: PV-TY2xy  
solar panel junction box drawing by solar junction box manufacturer
PV-TY2xy - Technical Data Sheet
 Item  Specification
 Rated Voltage (V) 1500V (TUV standard)
 Rated Current (A)  25A ~ 30A
 Working Temperature Range  -40℃~ 85℃
 Safety Degree  Class II
 Waterproof Structure  Poting Sealant
 Protection Grade  IP68
 Application Cable Size  4mm2
 Flame Resistance  UL94-V0 & UL94-5VA
 Width of Ribbons
  Up to 8mm
 Connection Method  Soldering
 Centerline Spacing Between Terminals  Positive: 17.2mm , Negative: 11.2mm
 Metal Materials  Copper , Tin-Plated
 Insulation Materials  PPO/PA66
 Optional Connector  PV-TY008, MC4 EV02

   PV-TY2xy: The Next-Gen PV Junction Box Built to Cool, Connect, and Protect Quarter-Cut Solar Module   

    We have been closely following the evolution of cell cutting technology. Solar cells are being divided into ever smaller pieces. While half‑cut modules have long been mainstream, from 2026 onwards major module makers began rolling out higher‑performance quarter‑cut modules. When a cell is cut into four, each piece carries a lower current, which reduces resistive power loss and thermal stress. This shift demands a more sophisticated pv module bypass diode junction box to handle the new electrical and thermal conditions. Our engineering team has developed the PV‑TY2xy, a dedicated pv module bypass diode junction box designed specifically for quarter‑cut modules.

In a quarter‑cut layout, the pv module bypass diode junction box becomes the nerve centre for protection and heat management. The PV‑TY2xy pv module bypass diode junction box features the following attributes:

  1. Complex circuitry – This pv module bypass diode junction box consists of two separate housings and integrates three pv module bypass diodes. Every diode inside the pv module bypass diode junction box is carefully selected for low forward voltage drop.

  2. Connection and protection – The pv module bypass diode junction box finely manages three sub‑circuits to maximise generation efficiency. Inside the pv module bypass diode junction box, each sub‑circuit is protected by a dedicated pv module bypass diode, safeguarding the panel under shaded conditions.

  3. Multi‑ribbon connection – To accommodate the quarter‑cut architecture, the pv module bypass diode junction box connects six bus ribbons, making the internal layout of this pv module bypass diode junction box significantly more intricate.

  4. Adapted to lower cell currents – With smaller cell currents, the pv module bypass diode junction box is rated at 20–30 A, providing a comfortable safety margin. The rating of the pv module bypass diode junction box and its integrated pv module bypass diodes reflects a no‑compromise design approach.

  5. Heat dissipation as the core challenge – Dense circuitry within the pv module bypass diode junction box causes heat to concentrate, especially around each pv module bypass diode. To tackle this, the pv module bypass diode junction box employs a split‑body design, metal heat sinks, and thermally conductive copper tabs. These features draw heat away from the pv module bypass diode and help the entire pv module bypass diode junction box stay cool under load.

  6. More stringent design standards – Compared with a half‑cut pv module bypass diode junction box, the PV‑TY2xy pv module bypass diode junction box has passed tougher reliability tests: 2,000 thermal cycles and 11,000 current switching cycles. Throughout these tests, every pv module bypass diode inside the pv module bypass diode junction box performed reliably, confirming a service life of over 30 years.

The core technical challenge for any quarter‑cut pv module bypass diode junction box is managing more severe thermal loads and more complex electrical connections within a smaller footprint. As a result, designing such a pv module bypass diode junction box demands systematic engineering that tightly integrates thermal, electrical, and process considerations—with the pv module bypass diode at the centre of the thermal strategy.

The PV‑TY2xy pv module bypass diode junction box is currently in pilot production, and the manufacturing process is still being refined. Our engineering team continuously improves the design of this pv module bypass diode junction box based on real‑world module testing feedback. In parallel, the pv module bypass diode junction box is undergoing TÜV certification, a rigorous process that further validates the long‑term stability of every pv module bypass diode inside the pv module bypass diode junction box. By perfecting both diode integration and overall build quality, this pv module bypass diode junction box will be ready to serve the market with flawless products.