Suntree 32A DC MCB 4 Pole 1000VDC Solar Circuit Breaker

Suntree 32A DC MCB 4 Pole 1000VDC Solar Circuit Breaker

The Suntree 32A DC MCB 4 Pole 1000VDC is a high-performance direct current miniature circuit breaker engineered for large-scale solar photovoltaic systems and high-voltage DC applications. With a rated current of 32A and a full 1000VDC rating across four poles, it delivers complete full-phase protection for multi-line DC circuits. Compact, DIN rail mountable, and IEC/EN60947 certified — it is the trusted 4-pole DC protection solution for commercial and industrial solar installations across Kenya.

What Is the Suntree 32A DC MCB 4 Pole 1000VDC?

The Suntree SL7-63 series DC miniature circuit breaker is designed specifically for solar photovoltaic systems. Unlike standard 2-pole DC breakers rated at 550VDC, the 4-pole configuration achieves 1000VDC by distributing the circuit protection across four poles — making it the correct choice for high-voltage solar string protection, large battery banks, and commercial PV installations where maximum DC voltage reach is required.

Suntree DC circuit breakers are purpose-built to protect photovoltaic power generation systems operating on direct current, providing cost-effective and high-quality overcurrent protection for solar energy systems of all sizes.

Key Features of the Suntree 32A 4 Pole 1000VDC DC MCB

Full 4-Pole 1000VDC Protection

The 4-pole configuration enhances the breaker’s capability to interrupt current flow in all four conductors simultaneously, ensuring comprehensive circuit protection at the full 1000VDC rating required by modern high-voltage solar PV systems. This makes it significantly more capable than a standard 2-pole 550VDC breaker for commercial and industrial applications.

Advanced Arc Extinguishing Technology

The arc extinguishing chamber adopts a multi-grid design, with each pole equipped with two arc extinguishing chambers to enhance arc extinguishing capacity. This is a critical safety feature in DC systems where arcs are inherently harder to extinguish than in AC circuits — significantly reducing the risk of electrical fires and equipment damage.

Non-Polarity Sensitive Design

With no positive and negative pole restriction, the breaker can be reversed and is easy to connect — reducing wiring errors on site and simplifying installation for solar installers and electricians working under time pressure.

High Breaking Capacity

With a breaking capacity of 6kA and full compliance with IEC/EN60947 standards, the Suntree 32A 4P MCB safely handles high fault currents — protecting your solar inverter, panels, and wiring from damage caused by short circuits and overloads.

Fast Arc Cutoff

With an opening distance greater than 9mm, the breaker quickly cuts off the arc — ensuring fast, reliable circuit interruption that minimises equipment damage during fault conditions and improves overall system safety.

DIN Rail Mountable

Designed for easy and secure installation on standard 35mm DIN rails, it fits neatly into solar combiner boxes, distribution boards, and electrical enclosures — simplifying the installation process for both new builds and system upgrades.

Compact and Durable Build

Constructed from high-quality, heat-resistant, and flame-retardant materials, the Suntree 32A 4P MCB is built to withstand the demanding operating conditions of Kenyan solar installations — including high ambient temperatures, dust, and humidity.

Technical Specifications

Where to Use the Suntree 32A DC MCB 4 Pole 1000VDC

Commercial Solar PV Installations

The 1000VDC rating makes this 4-pole MCB the ideal choice for commercial rooftop solar systems where higher string voltages are used to maximise energy yield and reduce wiring losses. It provides reliable overcurrent protection between solar panel strings and the inverter input.

Large-Scale Off-Grid Solar Systems

For large off-grid solar installations powering farms, schools, factories, and remote facilities across Kenya, the Suntree 32A 4P 1000VDC MCB provides the high-voltage DC protection needed to safeguard inverters, charge controllers, and battery banks from fault currents.

Industrial DC Power Systems

Ideal for industrial solar setups and commercial DC circuits, this MCB ensures system safety by automatically disconnecting in the event of overloads or short circuits — protecting equipment, wiring, and personnel from electrical hazards.

Solar Combiner Boxes

The compact DIN rail design integrates seamlessly into solar combiner and distribution boxes, providing individual string-level protection for high-voltage solar panel arrays at the full 1000VDC rating.

Battery Energy Storage Systems

Provides safe, reliable isolation and overcurrent protection for large battery bank systems in hybrid and off-grid solar installations — where high DC voltages demand a 4-pole solution for complete circuit disconnection.

Wind and Solar Hybrid Systems

Reliable high-voltage DC protection for wind and solar hybrid power systems, where variable generation conditions require a fast-tripping, high-capacity circuit breaker that can handle unexpected surges in current.

Suntree 32A 4P 1000VDC vs 2P 550VDC — Which Do You Need?

If your solar system operates at string voltages above 550VDC, the 4-pole 1000VDC version is the correct and safe choice for your installation.

Installation Guide

Step 1 — Confirm System Voltage

Verify that your solar PV system operates at or below 1000VDC before selecting this breaker. The 4-pole 1000VDC rating is required for high-voltage commercial solar string configurations.

Step 2 — Mount on DIN Rail

Clip the Suntree 32A 4P MCB securely onto a standard 35mm DIN rail inside your solar combiner box or distribution board. Ensure the installation position is vertical with no more than 10 degrees of obliquity on either side.

Step 3 — Connect DC Wiring

Connect your DC solar string cables to the input terminals. As this breaker is non-polarity sensitive, positive and negative wires can be connected without risk of incorrect polarity damage — simplifying on-site wiring.

Step 4 — Test Before Commissioning

Switch the breaker to the ON position, verify stable current flow, and confirm correct operation before fully commissioning your solar PV system.

Buy the Suntree 32A DC MCB 4 Pole 1000VDC in Kenya

The Suntree 32A DC MCB 4 Pole 1000VDC is in stock and available for fast delivery across Kenya. Trusted by solar installers, electrical engineers, and system integrators for its 1000VDC rating, compact 4-pole design, and IEC-certified reliability — it is competitively priced and ready for both residential upgrades and large commercial solar projects. Contact us today for bulk pricing, technical support, or to place your order in Nairobi.