Xi'an Sinofuse Electric Co., Ltd.

SINOFUSE EV-series NEV high-voltage power fuses are developed for the three-electric systems of pure electric and plug-in hybrid vehicles, covering main-circuit protection for the battery pack, drive motor, power conversion and charging circuits. The products adopt copper-silver composite elements and multi-gap arc-extinguishing structures, maintaining stable breaking performance under 800V high-voltage platforms and higher-power scenarios. Designed to GB/T 31465 and ISO 8820 automotive fuse standards, they offer excellent anti-vibration, shock resistance and wide-temperature adaptability. They have passed global nomination certifications from leading automakers in the US and Europe and are mass-supplied to customers such as Tesla, BYD and CATL. The full series features compact size, low internal resistance and high breaking capacity, serving as the core device of the NEV high-voltage safety system.

Rated voltage: DC70V-DC1000V (by model, covering EV320/EV315/EV321/EV08 series); Rated current: 80A-500A (e.g. EV320-5X 80-500A, others by rating); Breaking capacity: up to 20kA-50kA (typical EV320 series 6kA at rated voltage, higher-rated high-current models higher); Protection class: EV (automotive); Standards: GB/T 31465, ISO 8820; Element: copper-silver composite; Construction: multi-gap arc quenching, bolt/blade mounting; Operating temperature: -40C to +125C; Certification: passed major automaker nominations and multiple automotive certifications.

• Main-circuit protection for NEV battery system (BDU/battery pack)
• Drive motor and motor controller (MCU) circuit protection
• On-board charger (OBC) and DC fast-charging circuit protection
• Power conversion system (DCDC/PDU) and storage PACK protection

SINOFUSE pyrotechnic (trigger) fuses integrate a pyrotechnic trigger mechanism on top of a conventional power fuse, actively cutting the high-voltage circuit within milliseconds via an external control signal. In emergencies such as vehicle collision, insulation failure or battery thermal runaway, they isolate the high-voltage hazard faster and more reliably than passive fuses. The RT series uses knife contacts and compact packaging, suited to NEV and energy-storage high-voltage distribution architectures. Designed to IEC 60269 and GB/T 13539, they offer high breaking capacity and low loss. Having moved from concept validation to mass application, their adoption in high-end BEV and PHEV models keeps rising.

Rated voltage: AC690V (RT16/RT301 series), some models cover DC high-voltage applications; Rated current: 4A-160A (e.g. RT16-00-G 4-160A, by size); Breaking capacity: up to 120kA@AC690V; Trigger: external trigger signal (matches vehicle collision/fault interlock logic); Protection class: gG/gR (by model); Standards: IEC 60269, GB/T 13539; Mounting: knife/bolt type; Operating temperature: -40C to +125C; Response: millisecond-level active breaking.

• Active safety isolation of NEV high-voltage battery pack
• Fast high-voltage circuit cutoff in collision/thermal-runaway emergencies
• Main-circuit protection of energy-storage battery cluster
• High-voltage protection for charging facilities and power-conversion systems

The SINOFUSE SFD2 smart-fuse series integrates status monitoring and communication on top of a conventional fuse, sensing element health in real time and reporting to the vehicle controller. Built-in sensing and signal processing provide early warnings of overcurrent, aging and pre-fusing, supporting a 'visible, measurable, controllable' high-voltage system. The compact modular package suits NEV BDU and energy-storage PACK high-voltage distribution. Compared with ordinary fuses, SFD2 gives a warning window before failure, improving reliability and maintenance efficiency. Designed to automotive and industrial standards for harsh in-vehicle environments.

Rated voltage: DC500V-DC1000V (by model); Rated current: mid-to-high range (typical 20A-several hundred A by package); Breaking capacity: 10kA-35kA (by model, with 35uH circuit condition); Protection class: gPV/aR (by model); Smart features: built-in status monitoring, health reporting, communication interface; Standards: GB 13539, IEC 60269, ISO 16750/AK-LV124 (by model); Mounting: bolt/DIN-rail; Operating temperature: -40C to +125C; Protection rating: by package.

• Smart protection for NEV BDU high-voltage distribution box
• Monitoring and protection of storage PACK battery-cluster circuit
• Module-level smart protection for charging facilities
• Smart power distribution for industry and rail transit

The SINOFUSE PFH/SFM/SFH smart-fuse series covers the full high-voltage protection range from medium to ultra-high current (up to 1200A class), serving as the main protective devices for NEV and energy-storage systems. Taking PFH-745-DA as an example: rated DC1000V, 500A, breaking 16kA@35uH, designed to GB 13539, IEC 60269 and ISO 16750/AK-LV124 for automotive and storage harsh environments. The series features low resistance, low temperature rise and high reliability, interrupting quickly on short-circuit or overload to protect batteries and power devices. Modular packaging enables high-density integration in BDU and storage PACK. The full series is certified by leading automakers and storage leaders, supporting 800V platform scale-up.

Rated voltage: DC1000V (PFH/SFH/SFM series); Rated current: 350A (SFM-350), 400A (SFH-400), 500A-1200A (PFH-525/735/1200/745 etc.); Breaking capacity: 16kA@35uH (PFH-745-DA), others up to tens of kA by model; Protection class: gPV/aR; Standards: GB 13539, IEC 60269, ISO 16750/AK-LV124; Mounting: bolt/DIN-rail; Operating temperature: -40C to +125C; Features: low resistance, low loss, high breaking.

• Main-circuit protection for NEV BDU and battery pack
• High-voltage protection of storage PACK battery cluster
• Module protection for DC fast-charging and ultra-fast charging systems
• Circuit protection for power-conversion system (DCDC/PCS)

The SINOFUSE RSZ307 smart-fuse series targets NEV and energy-storage high-voltage, high-current circuits with monitoring-capable intelligent protection. The series is model-rich, covering low-voltage signal to high-voltage high-current tiers, with suffixes like '-XG' marking communication/smart variants. High-thermal-conductivity packaging and multi-gap arc quenching keep low temperature rise and high reliability under continuous high current. RSZ307 works with current sensors and relays as the core protection unit of smart BDU. Designed to IEC 60269 and GB/T 13539 for automotive-grade vibration, shock and temperature ranges.

Rated voltage: by model covering DC/AC high voltage (typical DC500V-DC1000V and AC690V classes); Rated current: multiple ratings (000/01/1/2/3/4/5 and N etc.); Breaking capacity: up to 100kA-120kA (by model and voltage class); Protection class: aR/gPV (by model); Smart features: some models with status monitoring and communication (marks -XG/-S5P etc.); Standards: IEC 60269, GB/T 13539; Mounting: bolt/blade; Operating temperature: -40C to +125C.

• High-voltage circuit protection for NEV smart BDU
• Battery-cluster and PCS circuit protection for storage systems
• High-voltage distribution protection for charging facilities
• Smart power distribution for industry and rail transit

The SINOFUSE RE-series high-voltage relays (contactors) control on/off switching of NEV high-voltage circuits, safely isolating and switching between the battery pack and loads. Sealed arc-quenching and low-contact-resistance design handle high current and frequent switching for drive, charging and pre-charge circuits. The RE series offers high insulation and anti-vibration capability, suiting 800V and lower platforms. Designed to UL, IEC and other standards, some control models are compatible with electronic protection logic. Working with fuses and current sensors, they form a complete high-voltage distribution and protection system; SINOFUSE is shifting from single devices to relay mass production and system solutions, with RE series ready for volume delivery.

Rated voltage: AC250V-DC high voltage (by model; RE2BMF-class control spec AC250V; high-voltage switching models higher); Rated current: 1A-16A (control/signal class) to tens of A (main-circuit class, by RE3 series); Switching/breaking: meets high-voltage DC arc-quenching by model; Control: coil-driven/signal control; Standards: UL 248-14 (some), IEC/GB relay standards; Insulation: high-voltage sealed package; Operating temperature: -40C to +125C; Mounting: PCB/bolt.

• On/off control of NEV high-voltage main circuit
• Battery-pack pre-charge and charging-circuit switching
• Drive motor and power-conversion system control
• BDU and charging-facility control

The SINOFUSE GO-series high-voltage relays cover multiple packages and contact configurations (A/C/Q/F/G/QA/N/P/R/LA/LB/FD/OH etc.) for diverse NEV and storage high-voltage control scenarios. They provide normally-open, normally-closed and multi-pole combinations, flexibly matching battery, charging and drive control architectures. The GO series uses high-performance contact materials and sealed arc-quenching structures for stable conduction and breaking under high-voltage DC. Meeting automotive-grade insulation, temperature rise and durability, they work with fuses to build the high-voltage safety system. The full series is finalized and entering mass-production readiness, supporting SINOFUSE's transition to system-solution provider.

Rated voltage: covers AC/DC high-voltage classes (by model); Rated current: by package (tens to several hundred A class); Contact form: NO/NC/multi-pole combinations (A/C/Q/F/G variants); Breaking: meets high-voltage DC arc-quenching; Standards: IEC/GB and automotive relay standards; Insulation: high-insulation sealed package; Operating temperature: -40C to +125C; Mechanical/electrical life: by model; Mounting: PCB/bolt.

• High-voltage circuit on/off and isolation control
• Storage battery-cluster and PCS control
• DC circuit switching for charging facilities
• Multi-pole BDU control

The SINOFUSE SEV-series high-voltage relays are developed specifically for NEV BDU applications; represented by SEVS200B with rated DC750V, 200A and 1500A single-break capability, designed to QC/T 1175. The series offers multiple current ratings 200A-400A (SEVS200B/SEVS250C/SEVH300C/SEVH400C), covering mainstream passenger and commercial vehicle high-voltage distribution. With high insulation, low resistance and long electrical life, they reliably isolate the high-voltage circuit on short-circuit or overload. SEV is the core control element of SINOFUSE's smart BDU, working with fuses and current sensors. The full series meets automotive-grade vibration, shock and temperature, and has entered volume matching.

Rated voltage: DC750V (SEV series); Rated current: 200A (SEVS200B), 250A (SEVS250C), 300A (SEVH300C), 400A (SEVH400C); Breaking capacity: 1500A (single) @DC750V; Protection class: /; Standards: QC/T 1175; Contact/structure: high-voltage DC sealed contactor; Insulation: high-insulation grade; Operating temperature: -40C to +125C; Mounting: bolt; Application: NEV BDU.

• Main-circuit control of NEV BDU high-voltage distribution box
• Battery-pack high-voltage isolation and switching
• High-voltage circuit protection for drive and charging systems
• High-voltage distribution control for commercial and passenger vehicles

The SINOFUSE RS306 current-sensor series detects NEV and storage circuit current in real time, providing accurate current feedback to the vehicle controller. Taking RS306-000-L as an example, it follows IEC 60269 and GB/T 13539, supporting AC690V, 10A-315A and 100kA associated breaking, protection class aR. The model-rich series covers detection from tiny signals to mid-high current, with suffixes distinguishing accuracy, output and package. RS306 works with fuses for integrated 'detection+protection', supporting a visible, measurable, controllable system. With excellent anti-interference and temperature-drift traits, it suits in-vehicle and data-center harsh environments.

Rated voltage: AC690V (RS306-000-L); Rated current: 10A-315A (by model); Associated breaking: 100kA (aR associated protection); Protection class: aR; Standards: IEC 60269, GB/T 13539; Accuracy: by model (suffix); Output: by model (analog/digital); Operating temperature: -40C to +125C; Mounting: bolt/DIN-rail; Application: current detection and associated protection.

• NEV high-voltage circuit current detection
• Data-center UPS and power-architecture current monitoring
• Storage and industrial inverter current feedback
• Smart BDU and distribution-system current sensing

The SINOFUSE RS309 current-sensor series offers multiple core and package configurations (MD/MF/MM) and automotive-grade variants with '-EV'/'-EVS' suffixes for NEV use. It precisely measures high-voltage circuit current, supporting the battery management system (BMS) and vehicle energy management. Automotive versions (e.g. RS309-MD-EVS-JP, RS309-MF-EV) meet automotive vibration, temperature and EMC requirements, integrating directly into BDU and battery pack. RS309 works with fuses to form a 'detection+protection' high-voltage safety system. With high linearity, low zero-offset and fast response, it suits 800V platforms; the full series is designed to IEC/GB standards and mass-applied in NEV and storage.

Rated voltage: by automotive high-voltage application (typical DC500V-DC1000V associated class); Rated current: by model (MD/MF/MM and EV variants); Accuracy: high linearity, low zero-offset (by model); Output: analog/digital (by suffix); Standards: IEC/GB and automotive standards (ISO 16750/AK-LV124 etc.); Operating temperature: -40C to +125C; Structure: closed/open-loop Hall (by model); Mounting: PCB/bolt; Variants: automotive suffixes -JP/-C/-EV.

• NEV battery-pack and BDU current detection
• Vehicle energy management and BMS current feedback
• Storage-system battery-cluster current monitoring
• Drive and charging high-voltage circuit sensing

The SINOFUSE ES-series current sensors target miniaturized, high-accuracy current detection for NEV and industrial scenarios, covering sub-series ES05D, ES08D, ES0GD, ES0GE. Suffixes like '-N' mark specific package and output configurations for board-level measurement in compact spaces. Using high-stability magnetic elements and temperature-compensation circuits, they keep accuracy across a wide temperature range, suiting in-vehicle and storage current monitoring. ES works with fuses and relays for real-time perception and protection interlock of high-voltage circuits. Designed to IEC/GB standards for automotive reliability; model suffixes (e.g. TMZ/Q4ZB/S7P) distinguish accuracy, pins and output.

Rated voltage: by application (typical automotive low/high-voltage associated class); Rated current: by sub-series (ES05/ES08/ES0G etc.); Accuracy: high precision, low zero-offset (by model suffix); Output: analog/digital (by TMZ/Q4ZB/S7P etc. suffix); Standards: IEC/GB and automotive standards; Operating temperature: -40C to +125C; Structure: board-level/SMD ('-N' marks specific package); Mounting: PCB soldering; Features: miniaturized, temperature-compensated.

• NEV board-level current detection
• Storage and charging-equipment current monitoring
• Industrial inverter and power-supply current feedback
• Smart BDU and BMS current sensing

The SINOFUSE RS308/RS08R/RSGE current-sensor series covers photovoltaic, storage, in-vehicle and industrial current detection. The RS308-PV series targets PV and DC-side applications, RS308-HB targets in-vehicle and storage high-current detection, and RS08R/RSGE178 offer compact and highly reliable schemes. Model suffixes precisely distinguish electrical parameters, accuracy and package (e.g. LGQ/LGH/LGHB/LGN, 3E/8E, 4G-D). With wide bandwidth, low drift and high insulation, they operate stably long-term in harsh environments. Working with fuses, the RS series supports the 'measurable, controllable' safety goal. The full series follows IEC/GB standards for automotive and industrial reliability.

Rated voltage: by model covering AC/DC (RS308-PV PV side, RS308-HB in-vehicle/storage side etc.); Rated current: by model (3E/8E/4G-D and LGQ variants); Accuracy: high linearity, low zero-offset (by suffix); Output: analog/digital (by model); Standards: IEC/GB and automotive/PV standards; Operating temperature: -40C to +125C; Structure: board-level/bolt ('-N' marks specific package); Features: wide bandwidth, high insulation, temperature-compensated.

• PV and storage-system DC-side current detection
• NEV and storage high-current circuit monitoring
• Industrial inverter and power-supply current feedback
• Smart BDU and distribution-system current sensing

SINOFUSE's smart BDU (high-voltage distribution box) is an integrated high-voltage distribution and protection solution for NEV three-electric systems, housing power fuses, pyrotechnic fuses, smart fuses, high-voltage relays and current sensors in one box. It builds a high-voltage safety system for the battery, drive, power-conversion and charging systems, ensuring energy is visible, measurable and controllable. The company offers three business models-component supply, physical integration and smart integration-meeting needs from single devices to integrated systems. With compact structure, high power density and excellent thermal performance, it suits 800V platforms and higher power. Leveraging its fuse expertise, SINOFUSE is transforming from single-device supplier to system-solution provider, with BDU's market far exceeding single fuses.

System voltage: DC400V-DC1000V (fits 400V/800V platforms); Integrated components: power fuse + pyrotechnic fuse + smart fuse + high-voltage relay + current sensor; Business models: component supply / physical integration / smart integration; Protection: fast breaking on short-circuit/overload, active isolation; Smart features: status monitoring, health reporting, communication interlock (smart-integration model); Standards: GB/T 31465, ISO 8820, QC/T 1175 and automotive standards; Structure: modular compact package, high protection rating; Operating temperature: -40C to +125C; Position: core NEV high-voltage distribution component.

• High-voltage distribution and protection for NEV battery system
• Power distribution for drive motor and power-conversion system
• Distribution for on-board charger and DC fast charging
• High-voltage distribution integration for storage systems