High-voltage DC circuit protection

High Voltage DC Fuse Manufacturer for EV, ESS & Charging Systems

Chauron supplies high-voltage DC fuses for electric vehicles (EVs), AI data centers (AIDC), energy storage systems (ESS), charging infrastructure, solar PV, industrial control systems, and other high-voltage systems. The product range covers voltages from 250 to 1500 VDC and currents from 10 to 3000 A, with model-specific breaking capacity, time-current characteristics, mounting information, and certification data to support engineering selection.

250–1500VDCpublished DC range

10–3000Apublished current range

Up to 250kAmodel-specific breaking capacity

EV, ESS & EVSEapplication coverage

Request Fuse Selection Support Browse HVDC Fuse Models

Chauron fuse range

High Voltage Fuse Products

Filter the catalog and open each product page for detailed dimensions, certifications and model data.

Engineering selection

How to Select a High Voltage DC Fuse

Define voltage

Use the maximum continuous DC voltage and credible transient conditions. The fuse DC voltage rating must meet or exceed the system requirement.

Calculate current

Apply continuous load, overload profile, ambient temperature, cooling, enclosure and busbar or cable conditions.

Check fault duty

Confirm prospective short-circuit current, circuit inductance and required breaking capacity at the stated voltage.

Verify coordination

Review time-current curves, pre-arcing and total I²t, peak let-through, cycling, vibration, dimensions and mounting torque.

Engineering note: A fuse cannot be selected from voltage and current alone. Breaking capacity, minimum breaking current, time-current performance and system coordination must be confirmed from the applicable model data.

Published range overview

Compare Chauron High Voltage Fuse Models

These values summarize data published on the current product pages. Confirm the complete duty profile and latest datasheet before specifying a model.

Chauron high-voltage fuse comparison
Model	Voltage type	Rated current	Breaking capacity	Standards / certification	Typical use	Details
SEV-10P	500–1000VDC	10–63A	10–20kA, L/R ≤ 2ms	ISO 8820, GB/T 31465, JASO D622; TÜV, CCC	EV auxiliary circuits, OBC, DC/DC, storage	View model
SEV-16H	250–1000VDC	30–200A	20–25kA, L/R ≤ 2ms	ISO 8820, GB/T 13539, JASO D622, IEC 60269; TÜV, CCC	EV battery modules, supercapacitors, charging	View model
SEV-30JC	250–500VDC	100–500A	20kA, L/R ≤ 2ms	ISO 8820, GB/T 13539, JASO D622, IEC 60269; TÜV, CCC	EV and battery DC protection	View model
SEV-38J	750–1000VDC	100–400A*	50kA, L/R ≤ 10ms	ISO 8820, GB/T 13539, JASO D622, IEC 60269; CE, CCC	EV traction, battery, ESS and charging	View model
SEV-50JM	500VDC*	125–630A*	20kA, L/R ≤ 2ms	ISO 8820, GB/T 31465, IEC 60269, GB/T 13539	High-current DC protection	View model
SEV-64J	1000VDC	400–800A	25kA, L/R ≤ 5ms	GB/T 13539.1, GB/T 13539.4	EV main circuits and high-current battery systems	View model
SES-159EI	1500VDC	1250–3000A	250kA	IEC 60269-4, GB/T 13539.4; TÜV, CCC	ESS high-voltage distribution and PCS	View model
SES-105FI	2000VAC	630–1250A	100kA	IEC 60269, GB/T 13539	AC high-current equipment; related product	View model
SSD-10M	690VAC	2–32A	80kA	IEC 60269	AC auxiliary and charging equipment; related product	View model

*The SEV-38J and SEV-50JM product summaries and dimension tables currently show different current ranges or voltage wording. Confirm the exact variant with Chauron engineering before design-in.

Direct answer

What Is a High Voltage DC Fuse?

A high voltage DC fuse is a one-time overcurrent protection device designed to interrupt sustained direct-current faults without allowing the arc to continue. Compared with an AC circuit, a DC circuit has no natural current zero crossing, so the fuse must be designed and tested for the stated DC voltage, prospective fault current and circuit time constant.

DC fuse vs. AC fuse

Voltage rating: use a verified DC rating for DC circuits.
Arc interruption: DC faults require greater arc-control capability.
Breaking conditions: evaluate fault current and L/R or inductance.
Coordination: compare time-current curves and I²t with cables, batteries and power electronics.

Application coverage

Where HVDC Fuses Are Used

Electric vehicles

Battery packs, BDU/PDU, traction inverters, OBC, DC/DC converters and auxiliary high-voltage circuits.

Energy storage

Battery racks, battery connection panels, combiner circuits, PCS and container-level protection.

Charging infrastructure

DC fast chargers, charging modules, DC buses, cabinets and supporting power conversion equipment.

Industrial DC systems

Data-center power, rail, wind and solar equipment, converters, UPS and other high-energy DC networks.

Manufacturer capability

Why Work With Chauron

Model-specific engineering

Selection considers voltage, current, fault level, inductance, time-current behavior, thermal conditions and mechanical constraints.

Testing and quality systems

Chauron presents IATF 16949 and management-system certifications together with CNAS-accredited laboratory capability on its corporate website.

Application breadth

The product range supports EV, ESS, charging, wind-solar, data-center and customer-specific power protection projects.

Frequently asked questions

HVDC Fuse FAQ

Can an AC fuse be used in a high-voltage DC circuit?

Use a fuse with an explicit DC rating at or above the maximum system voltage. A fuse rated only for AC may not safely interrupt a DC arc.

How do I choose the current rating?

Start with maximum continuous current, then apply overload duty, ambient temperature, cooling, enclosure, cable or busbar size and the manufacturer’s derating guidance.

What breaking capacity is required?

The fuse breaking capacity must exceed the maximum prospective short-circuit current under the published voltage and inductive conditions.

What do pre-arcing I²t and total I²t mean?

Pre-arcing I²t describes energy before the fuse element melts; total I²t includes the subsequent arcing period. Both help evaluate equipment protection and coordination.

Why is the circuit L/R value important?

L/R represents the DC circuit time constant. Greater inductance can sustain the arc and changes interruption duty, so breaking capacity must be read with its test conditions.

Which fuse is suitable for a 1500V battery energy storage system?

The SES-159EI is published for 1500VDC, 1250–3000A and 250kA breaking capacity. Final selection still requires the complete fault, thermal and coordination profile.

What information should I send for fuse selection?

Provide application, maximum DC voltage, continuous and overload current, prospective fault current, circuit inductance or L/R, ambient and cooling conditions, required clearing time, installation space and applicable standards.

Request a High Voltage Fuse Recommendation

Share your electrical duty, environmental conditions and mechanical limits. Chauron’s engineering team can review the closest published model or discuss a project-specific requirement. Contact Chauron Engineering