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JB2 PV Junction Box
Category: PV Junction BoxModel: JB2
JB2 is a 1000V PV junction box designed for solar photovoltaic modules, featuring a double fixed connection structure, 5A rated current and IP65 protection. It uses tin-plated copper contacts and PPO insulation, with support for 1.5, 2.5 and 4.0 mm² conductors.
Product Details
JB2 PV Junction Box
JB2 is a photovoltaic junction box designed for electrical connection within solar PV module assemblies. It provides a protected connection point between the module\u2019s internal conductors and the external PV circuit.
The JB2 is rated for 5A, with a voltage rating of 1000V according to TÜV specifications and 600V according to UL specifications. It uses tin-plated copper contacts and PPO insulation material, with a specified contact resistance of less than 5mΩ.
The junction box features a double fixed connection structure and supports conductor cross sections of 1.5, 2.5 and 4.0 mm², corresponding to 16, 14 and 12 AWG. With IP65 protection and an operating temperature range of -40°C to +85°C, JB2 is designed for outdoor photovoltaic module applications.
Key Features
- Double fixed connection structure for secure conductor retention
- 5A rated current
- 1000V TÜV / 600V UL voltage rating
- IP65 protection
- Tin-plated copper contacts
- PPO insulation material
- Contact resistance <5mΩ
- Supports 1.5 / 2.5 / 4.0 mm² conductors
- Compatible with 16 / 14 / 12 AWG cable sizes
- Operating temperature range of -40°C to +85°C
- UV-resistant and aging-resistant outer housing
- UL94-V0 flame classification
- Safety Class II
Double Fixed Connection
JB2 uses a double fixed connection structure to secure the electrical connection within the junction box. The dual fixing arrangement is designed to improve conductor retention and maintain a stable connection during assembly and operation.
The connection method should be applied according to the specified module assembly process and product installation requirements.
Low-Resistance Electrical Connection
JB2 uses tin-plated copper contacts with a specified contact resistance of less than 5mΩ, providing a low-resistance electrical connection for photovoltaic module applications.
What Is a PV Junction Box?
A PV junction box is an electrical enclosure installed on a photovoltaic module to provide a protected connection between the module\u2019s internal conductors and the external PV circuit.
The junction box helps protect electrical connections from outdoor environmental exposure and provides a defined electrical interface for the solar module.
Depending on the module design, a junction box may also incorporate electrical components such as bypass diodes. The exact configuration depends on the design and electrical requirements of the PV module.
1000V PV Junction Box
JB2 is rated at 1000V according to TÜV specifications and 600V according to UL specifications. The voltage rating provides a clear electrical specification for photovoltaic module applications.
The junction box rating should always be considered together with the voltage, current, conductor and other component ratings of the complete PV module and electrical circuit.
Conductor Compatibility
JB2 supports conductor cross sections of 1.5, 2.5 and 4.0 mm², corresponding to 16, 14 and 12 AWG cable sizes.
This range provides flexibility for integration into photovoltaic module designs using different conductor sizes, subject to the applicable electrical and assembly requirements.
Designed for Outdoor PV Applications
JB2 provides IP65 protection and is specified for an ambient temperature range of -40°C to +85°C.
The outer housing is designed to resist UV exposure and aging, helping protect the junction box during outdoor photovoltaic operation within its specified environmental conditions.
Technical Data
| Product Type | PV Junction Box |
| Model | JB2 |
| Insulation Material | PPO |
| Contact Material | Tin-Plated Copper |
| Rated Current | 5A |
| Rated Voltage | 1000V TÜV / 600V UL |
| Test Voltage | 8kV, 50Hz, 1 min (TÜV) |
| Contact Resistance | <5mΩ |
| Protection Rating | IP65 |
| Ambient Temperature | -40°C to +85°C |
| Flame Class | UL94-V0 |
| Safety Class | II |
| Conductor Cross Section | 1.5 / 2.5 / 4.0 mm² |
| Cable Gauge | 16 / 14 / 12 AWG |
| Connection Structure | Double Fixed Connection |
Applications
Solar PV Modules
Designed for integration into photovoltaic modules and solar panels.
Residential PV
Suitable for residential solar PV module applications within the specified electrical and environmental ratings.
Commercial & Industrial PV
Suitable for commercial and industrial photovoltaic module applications.
Distributed PV
Suitable for distributed photovoltaic systems using compatible PV modules and components.
Solar Module Manufacturing
Designed for integration into solar panel manufacturing processes requiring a fixed electrical connection within the module assembly.
