1500Vdc DC Fuse 400-2000A 50kA | GFBFG4-D-105ES Ess Fuse
GFBFG4-D-105ES square-body 1500Vdc aR DC fuse, 400–2000A, 50kA interrupting rating, 4×M10 bolt terminals for standard BESS, PV and wind power protection.
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GFBFG4-D-105ES Series 1500Vdc DC Fuse | 400–2000A, 50kA, aR Class for Energy Storage System
The GFBFG4-D-105ES series is a square-body, bolt-connected high-speed DC fuse link designed for 1500Vdc energy storage systems (ESS), photovoltaic inverters, wind power converters and other industrial DC applications. Specifically, this aR class fuse is rated from 400A to 2000A with 50kA interrupting capacity at 1500Vdc (L/R ≤ 15ms). Therefore, it delivers excellent DC breaking performance, strong current limiting and reliable partial-range protection for energy storage battery systems, PCS and power conversion equipment.
Key Features
Notably, this fuse series is optimized for routine 1500Vdc energy storage projects with moderate short-circuit fault levels. It includes these core advantages:
- Rated Voltage: 1500Vdc
- Rated Current Range: 400A – 2000A (17 standard ratings)
- Interrupting Capacity: 50kA at 1500Vdc (L/R ≤ 15ms)
- Fuse Class: aR (high-speed, partial-range protection)
- Mounting Type: Bolt-connected, square body #4
- Excellent DC Performance — optimized for DC circuit breaking
- Superior Cycling Capability — high cycle life for ESS applications
- Strong Current Limiting — limits peak fault current effectively
- High Breaking Capacity — 50kA fault current withstand
- Standards: UL 248-13 (refer to), CE, RoHS compliant, REACH declaration available
Typical Applications
In particular, this 50kA DC fuse is widely adopted in renewable power and battery storage systems. It works well for the following scenarios:
- Battery Energy Storage Systems (BESS)
- PV / Solar string inverters and combiner boxes
- Wind power converter DC side
- Industrial DC power distribution
- Uninterruptible Power Supply (UPS) systems
- DC traction and charging systems
Fuse Ratings & Models
Below is the full specification table for all available part numbers in the GFBFG4-D-105ES series. All variants share the same #4 body footprint. In turn, engineers can swap ampere ratings without redesigning the busbar layout.
| Part Number | Rated Current (A) | Size | Melting A²s @ 50kA/1500Vdc | Clearing A²s @ 50kA/1500Vdc | Power Loss (W) @ 1.0In |
|---|---|---|---|---|---|
| GFBFG4-400D-105ES | 400 | 4# | 42,250 | 255,800 | 168 |
| GFBFG4-500D-105ES | 500 | 4# | 93,500 | 585,500 | 175 |
| GFBFG4-630D-105ES | 630 | 4# | 163,000 | 1,020,500 | 185 |
| GFBFG4-700D-105ES | 700 | 4# | 225,500 | 1,320,000 | 192 |
| GFBFG4-800D-105ES | 800 | 4# | 310,000 | 1,970,000 | 196 |
| GFBFG4-900D-105ES | 900 | 4# | 425,000 | 2,600,000 | 200 |
| GFBFG4-1000D-105ES | 1000 | 4# | 640,000 | 4,005,000 | 210 |
| GFBFG4-1100D-105ES | 1100 | 4# | 780,300 | 4,950,000 | 220 |
| GFBFG4-1200D-105ES | 1200 | 4# | 915,000 | 5,865,500 | 242 |
| GFBFG4-1250D-105ES | 1250 | 4# | 1,080,000 | 7,150,600 | 255 |
| GFBFG4-1300D-105ES | 1300 | 4# | 1,300,000 | 8,040,000 | 260 |
| GFBFG4-1350D-105ES | 1350 | 4# | 1,320,000 | 9,060,000 | 266 |
| GFBFG4-1400D-105ES | 1400 | 4# | 1,665,000 | 10,700,000 | 275 |
| GFBFG4-1500D-105ES | 1500 | 4# | 1,870,000 | 11,950,500 | 282 |
| GFBFG4-1600D-105ES | 1600 | 4# | 2,235,000 | 14,880,000 | 294 |
| GFBFG4-1800D-105ES | 1800 | 4# | 2,850,000 | 17,950,000 | 313 |
| GFBFG4-2000D-105ES | 2000 | 4# | 3,750,000 | 23,900,000 | 345 |
Note: 2000A and above require consultation with factory for special requirements. In addition, I²t values are tested under 50kA /1500Vdc conditions.
Mechanical Dimensions (mm)
All models of this GFBFG4-D-105ES fuse family share identical #4 body dimensions. In other words, every current rating maintains the same mechanical outline for simple busbar design.
| Dimension | Value |
|---|---|
| Body Width (front face) | 121.5 ± 2 mm |
| Body Height (front face) | 105 ± 1.5 mm |
| Total Length (side view) | 154 ± 3 mm |
| Mounting Hole Spacing | 137 ± 2 mm |
| Terminal Hole Count | 4 pcs M10 |
| Max Hole Depth | 12.5 mm |
| Min Thread Length | 10 mm |
| Tin Plating Thickness | 3 – 5 microns |
Insert dimension drawing image here with alt text above.
Electrical & Environmental Specifications
Below you can view the complete electrical and environmental parameters. Meanwhile, the fuse keeps stable performance over wide temperature ranges for standard 1500V ESS projects.
| Rated Voltage | 1500 Vdc |
| Rated Current | 400A – 2000A |
| Interrupting Capacity | 50kA at 1500Vdc (L/R ≤ 15ms) |
| Fuse Class | aR |
| Minimum Breaking Current | > 5 In |
| Mounting | Bolt-connected square body |
| Size | 4# (body) |
| Working Temperature | -40°C to +85°C |
| Storage Temperature | -40°C to +120°C |
| Vibration Resistance | ≥ 20g (high frequency) |
| Standard | UL 248-13 (refer to), CE, RoHS |
| Application | Industrial ESS, PV, Wind Power |
Operating Guidelines
Follow these installation and derating recommendations to maximize service life and reliability of GFBFG4-D-105ES fuses. However, ambient temperature and altitude directly affect the actual continuous current rating.
| Derating | Regular current flow should not exceed 75% of rated current for long-term operation. |
| Ambient Temperature | Normal operating range -5°C to +40°C; above 40°C, apply derating factor Kt. |
| Altitude | Normal use below 2000m; above 2000m apply altitude correction factor Ka. |
| Forced Cooling | Forced air cooling can increase rated current (correction factor Kv). |
| Installation | Can be mounted vertically, horizontally or at an angle. Ensure adequate clearance between adjacent fuses. |
Frequently Asked Questions
1. What is the interrupting rating?
The fuse has a 50kA interrupting capacity at 1500Vdc with L/R ≤ 15ms, suitable for high-fault-level DC battery systems.
2. How many ampere ratings are available?
The series offers 17 standard ratings from 400A to 2000A: 400, 500, 630, 700, 800, 900, 1000, 1100, 1200, 1250, 1300, 1350, 1400, 1500, 1600, 1800, 2000A.
3. What standards does this fuse meet?
Refer to UL 248-13, CE marked, RoHS compliant. In addition, REACH declaration available upon request.
Downloads
You can download supporting PDF documents below. Besides, contact us directly if you need REACH or raw material declarations.
- Datasheet: GFBFG4-D-105ES 1500Vdc square body DC fuse for energy storage system
- Time-Current Curves: included in datasheet
- REACH Declaration: available upon request
