HK FJX Technology Co.,Limited

TECHNICAL RESOURCES

Isolated CAN FD in EVs

How galvanic isolation protects CAN FD networks in EVs from noise and ground loops.

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Galvanic Isolation for BMS

Why battery management systems need isolated communication between HV and LV domains.

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CAN Bus Diagnostics Guide

Common CAN bus failure modes, troubleshooting techniques and diagnostic tools.

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WHY CHOOSE FJX
HK

Hong Kong Based

Headquartered in Hong Kong with global logistics and export compliance expertise.

AEC

Automotive-Grade

Components sourced from TI and other Tier-1 suppliers, AEC-Q100 qualified.

OEM

Custom OEM/ODM

Tailored hardware and firmware development for your specific application.

24H

Global Support

24-hour technical response and worldwide shipping from Hong Kong warehouse.

Ready to Build Your Next Device?

Contact our engineering team for custom isolated communication solutions, OEM/ODM development, and bulk pricing.

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About us
HK FJX Technology Co., Limited is a device manufacturer headquartered in Hong Kong, specializing in isolated CAN FD communication modules, high-voltage monitoring units and charging infrastructure gateways. Built around TI automotive-grade isolation and CAN transceiver ICs, our products are deployed in electric vehicles, charging stations, industrial automation and rail systems. Our in-house production line covers SMT assembly, automated functional testing and 100% inspection before delivery.
Our philosophy
Every product we ship is designed, tested and manufactured in-house. We focus on isolation and CAN communication reliability - the backbone of electric vehicle, charging and industrial systems. Each unit passes automated functional testing and 100% inspection before delivery.
OUR SERVICES
High Reliability & Quality
Every device is 100% inspected and fully tested before shipment, backed by a 1-year warranty. Production follows strict ESD control and automated test procedures.
Automotive-Grade Components
Built around TI automotive-grade isolation and CAN transceiver ICs, our devices are engineered for long-term availability and consistent quality.
Responsive Technical Support
Our Hong Kong based engineers respond within one business day - supporting customers from design-in to field deployment, worldwide.
OUR PRODUCTS

Isolated CAN FD Module

DIN-rail isolated CAN / CAN FD for industrial and automotive networks.

HV Isolated Monitoring Unit

Safe data acquisition between HV power and LV control for BMS.

CAN Gateway for Charging

Reliable communication gateway for EV charging infrastructure.

Portable CAN Bus Analyzer

Handheld CAN / CAN FD analyzer with USB logging and field diagnostics.

Handheld BMS Diagnostic Tool

Portable BMS tester for voltage, temperature and isolation check.

Portable EV Charging Tester

Field tester for AC/DC charging pile communication and faults.

Industrial Isolated Repeater

Galvanically isolated CAN repeater extending distance up to 5km.

Portable Data Acquisition Gateway

Multi-channel data logger with CAN, Ethernet and 4G cloud upload.

Vehicle Diagnostic Interface

OBD-II / CAN adapter for fleet telematics and ECU monitoring.

Industrial CAN Switch

8-port managed CAN switch with VLAN and ring redundancy.

CAN to Modbus Gateway

Protocol converter bridging CAN / CAN FD to Modbus TCP and RTU.

Remote Telemetry Unit

Cellular RTU for remote monitoring with analog/digital I/O and GPS.
Skype：jiehui.lin                                           
Contact number：0755-83323882
Contact email：FJX@fjxtechnology.com , sales@fjxtechnology.com，Jacky@fjxtechnology.com
Contact address: Rm 702, New Lee Wah Ctr.,  88 Tokwawan Road, Kowloon, Hong Kong

CONTACT