GRL DNPV1451 PV Fuse Link DC 1000V 12-50A 14×51mm DC Fuse Supplier

Model No.：

DNPV1451

Rated Voltage：

1000 V DC

Current Range：

12-50A

Fuse Size:

14×51mm ceramic cartridge

Breaking Capacity：

30 kA

Protection Category：

gPV

Fuse Support:

Compatible with GRL DNPVF1-32L/63 fuse holders

Standards：

IEC 60269-6, GB/T13539.6

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Description

PV Fuse Link Overview

Product Introduction: The GRL DNPV1451 is a 14×51 mm DC photovoltaic fuse link engineered for high-reliability solar system protection. Like the DNPV1038, it is gPV-classified and rated for up to 1000 VDC, with a higher current range (12–50 A). This larger fuse link suits combiner boxes and DC distribution panels in commercial and utility PV installations. It provides short-circuit and overload protection for solar panel strings and semiconductor devices in PV arrays. By isolating only the faulty branch (“selective fusing”), the DNPV1451 helps maximize system uptime. The robust cylindrical fuse is made for demanding outdoor environments and aligns with GRL’s reputation for industrial-quality solar protection

Photovoltaic Fuse Link Technical Parameters

Model No.	Size	Rated voltage (V)	Rated current (A)	0.8In Power dissipation (W)	1.0In Power dissipation (W)	Weight (g)	Fuse support
DNPV1451-10A/1000V DC	14×51	DC 1000	10	2.5	3.8	14.5±2	DNPVF1-32L
DNPV1451-12A/1000V DC	14×51	DC 1000	12	3	4.8	14.5±2	DNPVF1-32L
DNPV1451-16A/1000V DC	14×51	DC 1000	16	3.1	5	14.5±2	DNPVF1-32L
DNPV1451-20A/1000V DC	14×51	DC 1000	20	3.5	6.2	14.5±2	DNPVF1-32L
DNPV1451-25A/1000V DC	14×51	DC 1000	25	4	7.2	14.5±2	DNPVF1-32L
DNPV1451-30A/1000V DC	14×51	DC 1000	30	4.5	8	14.5±2	DNPVF1-32L
DNPV1451-32A/1000V DC	14×51	DC 1000	32	5	8.4	14.5±2	DNPVF1-32L
DNPV1451-40A/1000V DC	14×51	DC 1000	40	4.5	7.6	14.5±2	DNPVF1-32L

Click to read：How does the fuse work?

Photovoltaic Fuse Link Features

The DNPV1451 shares the same construction principles as the DNPV1038, but scaled for higher current. Its key structural features are:

Ceramic Body: A robust ceramic tube filled with silica sand containing the fuse element. This design provides excellent insulation and rapid DC arc quenching, essential for solar DC protection.
Fast-Blow Element: Engineered to clear faults quickly (time constant ~1–3 ms), preventing sustained overcurrent. It has a high interrupt capacity (30 kA) for reliable short-circuit interruption.
Corrosion-Resistant End Caps: Tin-plated copper alloy ends ensure solid connectivity and resistance to environmental corrosion.
Standard Fuse Holder Compatibility: Fits GRL’s DNPVF1-32L/63 series fuse holders (for 14×51 fuses), enabling easy integration into PV combiner boxes.
UV- and Temperature-Resistant: Materials are chosen to withstand the UV exposure, temperature swings, and humidity commonly found in solar installations.

These features make the DNPV1451 a high-performance solar DC fuse link that meets the rigorous demands of photovoltaic systems.

RT18 32 fuse holders

Photovoltaic Fuse Link Advantages

Selective Overload Protection: Only the defective string blows, safeguarding the rest of the PV system. This selective action is critical for large solar farms to avoid total shutdowns.
High Current Handling: Rated up to 50 A, the DNPV1451 accommodates large panel strings or multiple panels in series, providing versatility in system design.
Rapid Response: Fast-acting fuse element with sand-filled housing extinguishes arcs quickly, minimizing energy let-through and protecting components.
Trusted Quality: Designed and tested to meet IEC and UL solar fuse standards. GRL’s strict manufacturing controls ensure high reliability and long life.
Compact & Lightweight: Despite higher ratings, the cylindrical 14×51 form is still relatively compact. This eases installation and reduces space requirements in combiner boxes.
Cost-Effective Protection: Offers higher interrupt capacity than typical DC breakers at a fraction of the cost, with no holding current or maintenance.
Comprehensive Compliance: Meets international safety standards (IEC, UL, CCC) for photovoltaic protection, ensuring it is accepted in global markets.

These selling points highlight GRL’s commitment to “High-standard manufacturing and rigorous testing” for dependable PV protection.

Photovoltaic Fuse Link Applications

- PV Combiner Boxes: Especially where panel strings require up to 50 A of protection. Each string fuse prevents back-feeding faults from affecting other strings.
- String and Array Protection: Suitable for commercial and utility-scale PV installations with moderate string lengths.
- DC Distribution Panels: As branch fuses for DC circuits in solar inverter rooms.
- DC Power Systems: Can protect DC bus circuits or battery-fed DC lines, provided they are within spec.
- All Photovoltaic Systems: Whether rooftop arrays, ground-mounted farms, or industrial solar parks, the DNPV1451 ensures safe operation up to 1000 VDC.
In each case, the DNPV1451 serves as a solar string fuse—for example, in a combiner box, one per PV string. Quickly interrupting faults on that string prevents the propagation of faults and protects expensive solar modules downstream.

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Photovoltaic Fuse Link FAQs

1、What does a fuse link do?

A fuse link contains a fusible element that melts under excessive current, breaking the circuit. In PV applications, it provides branch-level protection so that only the string with a fault is disconnected.

2、What is a PV fuse?

A PV fuse (photovoltaic or solar fuse) is specially designed for solar DC systems. It is built to interrupt high DC voltages and arcs reliably. The DNPV1451, like other PV fuses, uses a sand-filled ceramic design to extinguish DC arcs (which do not self-extinguish like AC).

3、How do you choose the right fuse link?

Consider the system’s DC voltage (1000 V here), the maximum continuous current of the PV string (fuse should be slightly above this value), and the fuse size (14×51 mm). Also ensure the fuse is gPV-rated for solar. For example, a string current of 40 A would use a 40 A DNPV1451 fuse.

4、Is there a difference between AC and DC fuses?

Yes. DC fuses like the DNPV1451 are specifically made to handle continuous DC currents and quench DC arcs. AC fuses rely on current zero-crossings (mains AC waveform) to help extinguish arcs; they may not reliably clear a fault in a DC circuit. Therefore, always use a DC/solar-rated fuse link in PV systems.

By offering reliable, selective, and fast-acting protection for PV circuits, the DNPV1451 fuse link helps maintain safe and efficient solar power generation. Its design and certification ensure compatibility with global PV standards, and GRL’s guarantee of quality

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