3 String PV Combiner Box 1000VDC | HD Series with Fuse, SPD & Breaker

(1) 3 string pv combiner box for 1000VDC solar PV systems.
(2) Equipped with 3× DC fuses + Type 2 SPD + DC breaker (MCB) for reliable protection.
(3) Rugged IP65 / IK09 PC enclosure, wall-mounted, PG glands for 2.5–16 mm² cabl

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HD Series — 3 String PV Combiner Box 1000VDC

The HD Series 3 string pv combiner box is engineered for solar arrays requiring three string input protection up to 1000VDC. Each string is protected by a DC fuse, with additional Type 2 surge protection and a DC breaker (MCB) for circuit isolation and overload protection.

Explore other options on our PV Combiner Box landing page or visit the manufacturer page for OEM details. For switch-based alternatives, check DC disconnectors. For quotations, contact us.

Key Features

  • Topology: 3 string (3 in / 1 out)
  • System Voltage: 1000V DC
  • Protection Devices: 3 × 10×38 mm DC fuses, Type 2 SPD (40 kA), DC breaker (32–63 A)
  • Enclosure: Polycarbonate, IP65 ingress & IK09 impact rating
  • Wiring: PG09 inputs, PG21 output; 2.5–16 mm² conductors
  • Standards: SPD tested to
    IEC/EN 61643-31; compliant with
    CE and
    UL.

Technical Specifications

Specification Value
Series HD
Input / Output 3 strings (3 in / 1 out)
Max System Voltage 1000V DC
Max Input Current 16 A per string
Max Output Current 48 A
Surge Protective Device Type 2 SPD, 40 kA
Fuse 3 × 10×38 mm DC fuses, typ. 16 A
Breaker DC breaker (MCB), 32–63 A
Enclosure PC, IP65
Impact Resistance IK09
Dimensions ~260 × 230 × 110 mm
Cable Entries PG09 inputs; PG21 output
Conductor Size 2.5–16 mm²
Operating Temperature −20 ℃ ~ +60 ℃
Humidity ≤ 99%
Altitude ≤ 2000 m
Installation Wall-mounted

Wiring Diagram

3 String PV Combiner Box diagram
Three PV strings → Fuses → SPD → DC breaker → Inverter

Applications

  • Residential and small commercial PV arrays with 3 strings
  • Solar rooftops requiring breaker-based isolation
  • Outdoor solar projects needing IP65 / IK09 protection

Related: DC Fuse, Surge Protective Devices, DC Switch Disconnectors, DC Breakers.

FAQ

What is a 3 string pv combiner box?

A combiner box designed for three PV strings, providing fuse, SPD, and breaker protection up to 1000VDC.

Does it use a breaker?

Yes, HD Series models integrate a DC breaker (MCB) for safe isolation, unlike HS models that use switch disconnectors.

What current ratings are supported?

Fuses are typically rated 16 A per string, while the breaker supports 32–63 A.

Is it outdoor rated?

Yes, the enclosure is IP65 ingress and IK09 impact rated, designed for outdoor solar systems.

Request a Quote

Send us your PV array specifications and we’ll configure the 3 string combiner box accordingly. Request a quote →

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