Designed for the distribution and protection of energy in electric and hybrid vehicles, the HV Junction box SYS2311 from Systel Elettronica is a high voltage module that operates up to 1000 V DC and supports currents up to 500 A, ensuring a safe and managed connection between battery, inverter, on-board charger, and HV subsystems.
Each unit is custom designed based on the electrical and mechanical architecture of the vehicle, integrating HV fuses, contactors, pre-charge circuits, and monitoring. The IP67 aluminum enclosure protects the system from dust, shocks, and moisture, while the integrated electronics enable leakage detection (Ground Fault Detection) and the management of the by-pass for DC charging. Designed for manufacturers and integrators of EV systems, the HV Junction box SYS2311 ensures reliable performance in any electric mobility or special machinery context.
Full customization
Starting from the customer's needs, each HV junction box is developed with dedicated electrical and mechanical configurations, adapting spaces, wiring, and protection functions to the type of vehicle.
Advanced security
The integration of a dedicated board for monitoring electrical leakage allows for the detection of any high voltage current losses and helps prevent risks even in harsh operating conditions.
Smart integration
In addition to power distribution, the HVJB can include monitoring sensors, smart fuses, and communication interfaces for the control and condition monitoring of the high voltage system.
Do you want to know more?
We will respond to you as soon as possible
High Voltage Junction Box
The high voltage (HV) junction box modules are designed to manage and distribute DC power up to 1000 V with high levels of safety and control. At Systel Elettronica, we create complete, finished HV junction boxes ready for installation, customizable in every detail to meet design and usage specifications.
Technical details HV Junction Box SYS2311 by Systel Electronics
Operating tension
up to 1000 V DC
Rated current
configurable based on the project (up to 500 A)
Integrated protection
via HV fuses or contactors
Main HV outputs
2 × 200 A with pre-charge circuit
Auxiliary HV outputs
1 × 20 A, 1 × 10 A
Charging functions
DC battery recharge bypass
HVIL Safety
switch on the lid connected to the HVIL interlock
Isolation monitoring
Bender card for HV dispersion control (Ground Fault Detection)
Integrable sensors
voltage, current, temperature (optional)
HV connectors
customized, with interlock systems
Container material
Aluminum
Degree of protection
IP67
Mechanical layout and dimensions
defined based on the vehicle architecture
External dimensions
315 × 410 × 150 mm
The production of HV Junction boxes at Systel Elettronica
High voltage, functional safety, and vehicle integration are fundamental skills when it comes to designing an HV Junction Box. At Systel Electronics every HVJB SYS2311 is developed internally based on the customer's specific needs: from sizing the currents and HV fuses, to defining the mechanical layout, up to integrating functions such as pre-charge, HVIL, and leakage control. The solutions are validated to ensure reliability up to 1000 V DC and compliance with OEM requirements. This end-to-end approach allows for a truly customized HV Junction Box, ready to be integrated into BEV, PHEV, and electrified special vehicle architectures.
Versatility of application in electric mobility
Safe routing of energy, protection of subsystems, and management of functions such as DC charging and pre-charging of the DC bus: this is at the heart of high voltage distribution in electric and hybrid vehicles where the HV Junction Box SYS2311 from Systel Electronics comes into play. It can be configured to connect battery, traction inverter, DC/DC converter, onboard charger, and auxiliary lines. The integration of sensors and monitoring functions allows for improved diagnostics, maintenance, and operational safety. With all customization options, the HVJB SYS2311 becomes a key component in EV projects where reliability and modularity are essential requirements.
Performance and reliability for automotive
The SYS2311 – HV Junction Box for electric vehicles is designed for sectors where high voltage energy management must coexist with harsh environments and heavy workloads. From off-highway automotive platforms to electrified agricultural vehicles, up to commercial vehicles and special machines, the HVJB from Systel Elettronica combines the protection rating of IP67, high currents, and integrated protections to ensure service continuity. The ability to define layouts, connections, and safety functions according to the project allows for space optimization and simplifies wiring, in compliance with the specific regulations for each application.
Why choose Systel Electronics?
Your technological challenges deserve concrete answers. In a rapidly evolving market, every second counts. That's why you need precise, reliable, and customized electronic solutions to optimize your work.
Together we can start a shared journey: at Systel Electronics we listen to your needs, we design according to your goals, we produce in-house to ensure you quality and reliable timelines. From the first prototype to mass production, every detail is taken care of to offer you maximum control and certainty of the result. Rely on those who turn innovation into operational value. Start your project now with Systel Electronics.
Beyond the HVJB: all the products Systel Electronics
In addition to the HVJB, Systel Electronics designs and produces a complete range of electronic solutions for energy management and electronic control in electric vehicles and industrial systems. DC-DC converter, PDM with CAN Bus, touchscreen HMI, Gateway IoT and LED illuminators: a complete and coherent landscape for electrification and automation. Discover all the products Systel Electronics and find the system that best suits your needs, ready for the optimization of your systems.