igh‑Speed DC Fuse GFEVT1000‑38R 1000Vdc 250‑400A aR Type
GFEVT1000‑38R high‑speed aR DC fuse 1000Vdc 250‑400A,50kA breaking capacity. Bolt‑on M8 for battery pack & energy‑storage protection, comply IEC60269.4 UL248.13 RoHS.
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High‑Speed DC Fuse GFEVT1000‑38R Series 1000Vdc 250A‑400A aR Type
GFEVT1000-38R-Series.-250-400A-1000Vdc-I.R-50kA-High-speed-fuse
High‑speed DC fuse GFEVT1000‑38R series is an aR‑type semiconductor protection fuse designed for 1000Vdc heavy‑duty DC systems. In fact, it delivers outstanding DC breaking performance with a rated breaking capacity up to 50kA. This bolt‑mount fuse covers 250A, 275A, 315A, 350A and 400A current grades. Furthermore, it works perfectly for lithium battery pack protection, energy‑storage cabinets and new‑energy power conversion equipment.
Compliance note: This fuse complies with IEC 60269.4, UL 248.13 and JASO‑D622 standards. Besides, it meets RoHS requirements; you can request REACH declaration upon bulk‑order.
General Specifications
| Product Series | GFEVT1000‑38R High‑Speed DC Fuse |
| Rated DC Voltage | 1000 Vdc |
| Rated Current Range | 250A, 275A, 315A, 350A, 400A |
| Fuse Class | aR (Semiconductor protection) |
| Rated Breaking Capacity | 50 kA; Time Constant ≤5ms |
| Recommended Bolt | M8 |
| Installation Torque | 12±1.0 N·m |
| Key Overall Dimensions | Total length:132.5±2 mm; Body length:102±1.5 mm; Diameter Φ37±1 mm |
| Standards & Compliance | IEC 60269.4, UL 248.13, JASO‑D622, RoHS compliant |
| Typical Applications | Battery pack, energy‑storage system, power converter, new‑energy DC circuit |
Electrical Rating Table
| Catalog Model | Rated Current | Melting A²S | Clearing A²S | Watts Loss@80% | Watts Loss@100% |
| GFEVT1000‑250A‑38R | 250A | 10560 | 48900 | 30 | 49 |
| GFEVT1000‑275A‑38R | 275A | 12900 | 60090 | 34 | 67 |
| GFEVT1000‑315A‑38R | 315A | 15600 | 72600 | 39 | 90 |
| GFEVT1000‑350A‑38R | 350A | 20800 | 93000 | 44 | 105 |
| GFEVT1000‑400A‑38R | 400A | 38500 | 130200 | 55 | 130 |
Note: Test condition:1.12kVdc,51.2kA,T=4.78ms; DC Peak arc voltage:1.49kV. Time‑current curve tolerance ±15% on current value.
Core Product Advantages
- It targets pure DC‑1000V applications, and it delivers superior DC short‑circuit breaking performance for semiconductor‑based power equipment.
- Under high‑fault‑current conditions, it opens up to ten‑times faster; therefore, it reliably protects power semiconductors, battery cells and internal wiring.
- You can install multiple fuses in parallel within sizing guidelines, so you achieve higher total ampacity for large‑scale energy‑storage projects.
- It shows great resistance to voltage impulse and wide ambient‑temperature tolerance. Meanwhile, it withstands high‑level mechanical shock and vibration up to 20g acceleration.
- Bolt‑on M8 lug design brings stable connection; you just follow 12±1.0N·m torque to get low‑resistance contact.
Application Scenarios
- Lithium‑ion battery pack over‑current & short‑circuit protection for energy‑storage systems
- DC side protection for solar‑storage converters, bidirectional inverters and power conversion devices
- New‑energy industrial DC power cabinets and high‑voltage off‑grid power equipment
- Semiconductor device protection for rectifier and DC power supply units
Important Installation & Operation Guidelines
- This is an aR‑type high‑speed DC fuse. Do not deploy it for AC circuits outside specification scope.
- Use M8 bolts and keep installation torque at 12±1.0N·m. If you apply insufficient torque, you will trigger over‑heating; on the other hand, over‑torque may damage ceramic body.
- For high‑altitude locations above 2000 m, you need to derate rated current especially inside closed cabinet enclosures.
- You may mount the fuse vertically, horizontally or tilted. Nevertheless, avoid gravity‑and‑vibration interference for spring‑contact‑type assembly structures.
- Always cut off full DC power before replacement. You must discard and replace any mechanically‑damaged fuse unit.
- Do not swap fuses under load unless your equipment supports load‑break switch‑type structure.
Environmental & Custom Information
- Ambient humidity: Max 50%RH @40℃; can reach 90%RH @20℃ without heavy condensation.
- Altitude reference: Normal operating altitude ≤2000 m; 2000‑4500 m requires current‑derating for closed‑box installation.
- Documentation: RoHS standard included; you can ask for REACH statement for bulk purchase.
- Packing: Standard neutral packing; support custom marking upon large‑volume orders.
Frequently Asked Questions
Q1: What voltage and class is GFEVT1000‑38R fuse?
A1: GFEVT1000‑38R runs at 1000Vdc and belongs to aR high‑speed semiconductor‑protection class. For this reason, it mainly protects DC battery‑energy‑storage and power‑conversion equipment.
Q2: What is the rated breaking capacity of this high‑speed fuse?
A2: Its rated breaking capacity reaches 50kA with time constant ≤5ms. Moreover, it offers fast‑acting clearing performance under severe short‑circuit faults.
Q3: Can I run multiple GFEVT1000‑38R fuses in parallel?
A3: Yes. You can apply parallel mounting within official sizing guidelines. However, you need to guarantee balanced current sharing for each individual fuse unit.
Q4: What bolt torque should I use during installation?
A4: Please adopt M8 bolt and keep tightening torque to 12±1.0N·m. Too‑loose connections produce heat; meanwhile, excessive torque risks cracking ceramic housing.
Q5: Do I need to derate current when installing at high altitude?
A5: If you mount inside closed cabinets above 2000 m altitude, you must derate rated current (2‑5% per 1000 m). On the contrary, open‑air installation generally ignores altitude‑related derating impact.
Q6: Which standards does GFEVT1000‑38R comply with?
A6: It meets IEC 60269.4, UL 248.13, JASO‑D622 and RoHS rules. In addition, we can provide REACH declaration upon customer request for bulk‑order projects.
