1500V PV Fuse 50-630A gPV Class | GFPVT1500 Solar Fuse
GFPVT1500-59ES series 1500Vdc photovoltaic fuse, 50-630A, 50kA breaking. gPV class solar fuse for PV inverter and string combiner. UL 248-19, IEC 60269-6.
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GFPVT1500-59ES Series 1500Vdc Photovoltaic Fuse | 50–630A, gPV Class, 50kA
The GFPVT1500-59ES series is a PV fuse designed as a 1500Vdc photovoltaic gPV class solar fuse for PV inverter and string combiner protection. This fuse supports 50-630A with 50kA breaking and UL 248-19 certification.
,The GFPVT1500-59ES series is a gPV class photovoltaic fuse link specifically designed for 1500V solar photovoltaic systems. Specifically, it is rated from 50A to 630A with a 50kA breaking capacity at 1500Vdc. Therefore, this fuse provides full-range protection for all potential overcurrent conditions in PV applications. Moreover, it features low I²t value, strong current limiting, low voltage drop and excellent DC breaking performance; as a result, it can interrupt the low overcurrents associated with faulted PV strings. In addition, it is available in bolted and Din-rail mounting options with fiberglass or ceramic body. For instance, it works perfectly for PV inverter protection and array combiner applications.
Key Features
Notably, this fuse series delivers stable DC protection for medium-current PV projects, and it comes with these core specifications:
- Rated Voltage: 1500Vdc
- Rated Current Range: 50A – 630A (13 standard ratings)
- Breaking Capacity: 50kA at 1500Vdc
- Fuse Class: gPV (full-range photovoltaic protection)
- Time Constant: ≤ 2 ± 0.5 ms
- Low I²t Value — minimizes let-through energy
- Strong Current Limiting — limits peak fault current
- Low Voltage Drop / Low Power Loss
- Faulted PV String Protection — interrupts low overcurrents from faulty strings
- Two Mounting Options: Bolted (horizontal) and Din-rail
- Standards: UL 248-19 / IEC 60269-1/6, RoHS, REACH available
Typical Applications
Thanks to its gPV full-range protection and compact 59mm body size, this fuse is widely used in medium-capacity solar infrastructure. Furthermore, it is engineered for 1500V DC solar arrays. In particular, it fits well in combiner boxes and string inverters:
- PV / Solar String Inverters
- Solar Array Combiner Boxes
- 1500V Photovoltaic Power Plants
- PV Disconnect Switch Gear
- Solar Pumping Systems
- Off-grid / Grid-tied PV Systems
Fuse Ratings & Models
We supply 13 standard current ratings for this 59ES series. Each rating comes in both bolted and DIN rail variants. As a result, buyers can select the mounting type to match their cabinet layout.
| Part Number (Bolted) | Part Number (Din) | Rated Current (A) | Melting A²s | Clearing A²s | Power Loss @ 100% (W) | Power Loss @ 70% (W) |
|---|---|---|---|---|---|---|
| GFPVT1500-50B-59ES | GFPVT1500-50U-59ES | 50 | 800 | 3,500 | 20 | 8 |
| GFPVT1500-63B-59ES | GFPVT1500-63U-59ES | 63 | 1,500 | 5,400 | 32 | 20 |
| GFPVT1500-80B-59ES | GFPVT1500-80U-59ES | 80 | 2,600 | 9,600 | 38 | 23 |
| GFPVT1500-100B-59ES | GFPVT1500-100U-59ES | 100 | 3,700 | 13,000 | 48 | 28 |
| GFPVT1500-125B-59ES | GFPVT1500-125U-59ES | 125 | 5,400 | 21,000 | 60 | 32 |
| GFPVT1500-160B-59ES | GFPVT1500-160U-59ES | 160 | 8,400 | 32,000 | 68 | 36 |
| GFPVT1500-200B-59ES | GFPVT1500-200U-59ES | 200 | 13,500 | 55,000 | 79 | 40 |
| GFPVT1500-250B-59ES | GFPVT1500-250U-59ES | 250 | 26,500 | 105,000 | 82 | 45 |
| GFPVT1500-315B-59ES | GFPVT1500-315U-59ES | 315 | 50,500 | 201,500 | 95 | 55 |
| GFPVT1500-350B-59ES | GFPVT1500-350U-59ES | 350 | 65,000 | 320,000 | 100 | 57 |
| GFPVT1500-400B-59ES | GFPVT1500-400U-59ES | 400 | 85,000 | 354,000 | 109 | 64 |
| GFPVT1500-500B-59ES | GFPVT1500-500U-59ES | 500 | 217,000 | 750,000 | 121 | 71 |
| GFPVT1500-630B-59ES | GFPVT1500-630U-59ES | 630 | 434,000 | 1,150,000 | 128 | 76 |
I²t values tested at 50kA/1500Vdc. In addition, DC cold resistance measured at <10% rated current, 25°C ambient.
Mechanical Dimensions (mm)
This fuse series supplies two mounting styles, so their physical dimensions differ slightly. In other words, engineers can choose bolted busbar connection or DIN rail clip installation according to cabinet layout.
| Dimension | Bolted (B) | Din-rail (U) |
|---|---|---|
| Overall Length | 192 ± 2.5 | 192 ± 2.5 |
| Body Length | 124 ± 2.5 | 124 ± 2.5 |
| Body Width | 59 ± 1 | 59 ± 1 |
| Total Height | 73 ± 6 | 73 ± 2 / 23 ± 2 |
| Mounting Hole Spacing | 149 ± 2.5 / 168 ± 2.5 | 155 ± 2.5 |
Insert dimension drawing image here.
Electrical & Environmental Specifications
Below are the full electrical and environmental specs. Notably, this fuse maintains stable performance across a wide temperature range.
| Rated Voltage | 1500 Vdc |
| Rated Current | 50A – 630A |
| Breaking Capacity | 50kA at 1500Vdc |
| Fuse Class | gPV (full-range) |
| Time Constant | ≤ 2 ± 0.5 ms |
| Body Material | Fiberglass or Ceramic |
| Mounting Options | Bolted (B) / Din-rail (U) |
| Working Temperature | -40°C to +85°C |
| Storage Temperature | -40°C to +120°C |
| Vibration Resistance | ≥ 20g |
| Standards | UL 248-19 / IEC 60269-1/6, RoHS |
| Application | PV Inverters, String Combiners, Solar Plants |
Time-Current Characteristics (UL 248-19)
The time-current performance strictly complies with UL 248-19 photovoltaic fuse requirements. In fact, this standard defines the minimum and maximum melting time for PV fault protection.
| Test Condition | Standard | Requirement |
|---|---|---|
| 100% of rated current | UL 248-19 | No fusing; 4 hours min. |
| 105% of rated current | UL 248-19 | 60 minutes min. |
| 135% of rated current | UL 248-19 | 120 minutes max. |
| 150% of rated current (61-800A) | UL 248-19 | 240 minutes max. |
| 150% of rated current (61-100A) | UL 248-19 | 8 minutes max. |
| 200% of rated current (101-200A) | UL 248-19 | 10 minutes max. |
| 200% of rated current (201-400A) | UL 248-19 | 12 minutes max. |
| 200% of rated current (401-600A) | UL 248-19 | 14 minutes max. |
| Endurance (100% rated, 4hrs, temp rise) | UL 248-19 | ≤ 65K |
Operating Guidelines
To maximize service life and reliability of GFPVT1500-59ES fuses, follow these installation and derating recommendations. However, keep in mind that ambient temperature and altitude will 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. Two mounting options available: bolted horizontal or Din-rail. |
Frequently Asked Questions
1: What does gPV class mean?
gPV is a full-range protection class specifically for photovoltaic applications. In contrast to aR class (which only protects high fault currents), gPV fuses can interrupt all overcurrents including low overcurrents from faulted PV strings. Therefore, it provides complete string-level protection.
2: What is the difference between Bolted and Din-rail mounting?
The Bolted (B) version uses horizontal bolt terminals for direct busbar connection. Meanwhile, the Din-rail (U) version features a Din-rail clip for snap-mounting on standard DIN rails in combiner boxes and inverter enclosures. Importantly, both offer identical electrical performance.
3: What standards does this fuse meet?
It complies with UL 248-19 (photovoltaic fuse standard) and IEC 60269-1/6 (international low-voltage fuse standard). In addition, it is RoHS compliant. UL certification pending.
4: How many ampere ratings are available?
We offer 13 standard ratings from 50A to 630A: 50, 63, 80, 100, 125, 160, 200, 250, 315, 350, 400, 500, 630A. Each is available in both Bolted and Din-rail versions.
5: Why is low I²t important for PV fuses?
Low I²t means the fuse clears faults quickly with minimal let-through energy. As a result, it reduces stress on PV modules, inverters and string cabling. It also limits peak fault current to protect downstream equipment.
6: Can this fuse interrupt faulted PV string low overcurrents?
Yes. Unlike aR class fuses that only clear high-level faults, the gPV class design can interrupt the low overcurrent conditions associated with faulted PV strings. In fact, this capability is critical for array safety.
Downloads
You can download supporting PDF documents below. In addition, please contact us if you need REACH or raw material declarations.
- Datasheet: GFPVT1500-59ES-1500V-50-630A-Photovoltaic-Fuses.-2
- Time-Current Curves: included in datasheet PDF
- REACH Declaration: available upon request
