Chauron designs and manufactures high-voltage DC fuses and triggered pyrofuse disconnects for EV batteries, energy storage, charging and other high-energy DC circuits. Select by the full fault duty — voltage, prospective current, circuit inductance and clearing time — not by rated current alone.
What the published manufacturing scope means for a buyer.
Hangzhou Chauron Technology Co., Ltd. (杭州超熔科技有限公司) was founded in April 2018 and operates the chauronsafe.com website. The company states that its R&D centre and first manufacturing base are in Hangzhou, with a second production facility in Loudi, Hunan, and that its electrical-performance and environmental laboratories hold CNAS accreditation. Its catalogue has two main lines: passive HVDC fuses that open on overcurrent, and pyrofuses that physically cut a busbar on a trigger command from a BMS or crash controller. The profile below follows the company’s own model tables and keeps their test conditions attached to each figure. [2]
An HVDC fuse reacts to current and heat; a pyrofuse opens on an external trigger and can isolate a battery during a crash or a low-current fault that would not melt a fuse quickly. Chauron publishes both and describes using them together with contactors in one protection concept, so the comparison should be made at system level. [6]
Breaking capacity is given together with voltage and circuit inductance — for example SPF-3 at 1000 V / 16 kA / 20 μH and SEV-38J at 50 kA with L/R ≤ 10 ms. Because DC arcs have no current zero, these conditions decide whether a rating applies to your circuit. [4]
The capability page states that the founder is a member of SAC/TC340, the national fuse standardisation committee, and lead author of a GB/T fuse requirement for battery systems. This is the company’s own account; it indicates where the engineering focus lies, not an approval of any product. [3]
The customisation page offers adjustment of rated current, voltage and breaking capacity, mounting size, terminal structure and housing, with design, sample verification and mass production. A custom part needs its own test evidence rather than the ratings of the nearest catalogue model. [8]
CNFX synthesis of the company’s published information.
The ranges below are taken from the company’s category and model pages. Maximum values come from different models and test conditions and do not apply simultaneously.
SEV-10P, -16H, -30JC, -38J, -50JM and -64J cover 250–1000 VDC and 10–800 A, for auxiliary circuits, OBC and DC/DC, battery modules and traction circuits. Standards cited include ISO 8820, JASO D622, GB/T 13539 and IEC 60269. The company itself notes that SEV-38J and SEV-50JM summary and dimension-table ratings differ; confirm the exact variant. [4]
Rated 1500 VDC, 1250–3000 A and 250 kA breaking capacity to IEC 60269-4 and GB/T 13539.4, for high-voltage distribution boxes and PCS in energy-storage systems. TÜV and CCC are listed on the model page. [5]
SPF-1 (150 VDC, 300 A), SPF-2 (500 VDC, 400 A), SPF-2L (930 VDC, 400 A), SPF-3 and SPF-4C (1000 VDC, 400 A) are listed for EV battery BDUs, OBC/all-in-one units, household ESS, electric ships and wind power. SPF-4C is published without verified breaking conditions; ask for them before design-in. [6]
SES-105FI (2000 VAC, 630–1250 A, 100 kA) and SSD-10M (690 VAC, 2–32 A, 80 kA) appear in the same catalogue as related AC products for high-current equipment and charging auxiliaries. [4]
Chauron’s product pages describe the information it needs for selection and the evidence to request during design validation.
Maximum and transient voltage, continuous and overload current, prospective fault current range, circuit inductance or L/R, ambient temperature, cooling and required clearing time. [4]
Trigger, no-fire and diagnostic currents, connector, busbar geometry, mounting orientation and torque. SPF-3, for example, publishes a 1.75 A / 0.5 ms trigger, ≤100 mA diagnostic current and an ISO 19072-4 socket. [7]
Review time-current curves, pre-arcing and total I²t, peak let-through, thermal derating and dimensions. Ask for the latest datasheet and drawing, since web summaries may lag the controlled document. [4]
The customisation page describes R&D design, sample verification and mass production. Agree the qualification tests, report format and change notification before the production order. [8]
Inspection, testing and project documentation.
The company lists IATF 16949, ISO 14001, ISO 45001 and CNAS laboratory accreditation, plus product marks including UL, CSA, CE, CCC, TÜV and CB. The pyrofuse page itself advises evaluating company-level credentials separately from model-specific approvals; request the certificate for the exact model and rating. [3]
Solution pages describe very fast pyrofuse interruption in general terms, while model tables give <2 ms for SPF-2 and <3 ms for SPF-3 under stated voltage, current and inductance. Specify the clearing time required by your system and obtain the waveform or report for that condition. [6]
SPF-3 publishes −40 °C to 105 °C operation with current derating from 400 A at 85 °C to 200 A at 125 °C on 95 mm² cable, and vibration, shock and chemical tests to AK-LV 124. Use the model page, not general solution text, for qualification limits. [7]
The company lists EV, energy-storage, charging, wind-solar and data-centre applications; the selection inputs differ for each.
Battery packs, motor controllers and on-board chargers on 400–800 V platforms, with SPF-2, SPF-2L and SPF-3 listed for battery disconnect units. A pyrofuse here is coordinated with contactors and a passive fuse in the vehicle safety concept. [9]
Battery racks, combiner circuits and PCS, up to 1500 VDC for SES-159EI. Charge and discharge current, DC fault behaviour and coordination with contactors should be reviewed at system level. [10]
DC fast-charger modules and buses, data-centre DC power, wind and solar converters, and electric ships appear in the company’s application list. [4]
CNFX procurement assessment.
Suited to EV, battery-storage and power-electronics teams that need high-voltage DC protection selected against a defined fault duty, including projects that combine a triggered pyrofuse with passive fuses. The decisive checks are the model-specific breaking conditions, thermal derating, trigger parameters and the certificate for the exact rating — not the company-level certifications or headline maximums.
Website research · 2026-10-11
Prepared from Hangzhou Chauron Technology Co., Ltd. / Chauron’s English website. Capability descriptions and application information are company-published; CNFX’s project-fit assessment is editorial analysis. Company claimed indicates profile management, not quality certification. Source methodology.
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