ZJ Beny BYA-63 Series Weatherproof AC Isolation Switch, 1 or 3 Poles, 35/63A

The ZJ Beny BYA-63 is a rugged weatherproof AC isolation switch designed for safely disconnecting solar inverters on the AC side of a PV system.

It comes in single-pole (1P) and three-pole (3P) versions, with current ratings ranging from 20A up to 63A. The switch is rated for 250–440 VAC operation, matching typical single or three-phase inverter outputs. Its IP66-rated polycarbonate enclosure provides complete protection against dust and powerful water jets. The UV-stable, flame-retardant housing ensures long-term durability under harsh Australian sun. A clear ON/OFF marking and pad-lockable handle add safety, while the base-mounted design offers extra wiring space for a neat installation.

ZJ Beny provides a comprehensive installation guide and datasheet for easy setup; the base-mounted terminals make wiring straightforward and allow bottom/top conduit entries for flexible cable routing. 

In practice, engineers specify the BYA-63 for its compact footprint and compliance with standards, contractors value the quick lockable installation, and homeowners enjoy the peace of mind from a durable, long-life safety switch.

ZJ Beny BYA-63 Series Weatherproof AC Isolation Switch

• Poles: Available in single-pole (1P) and three-pole (3P) versions (A two-pole version is also offered for split-phase systems).
• Current Ratings: 20A, 35A, or 63A (choose the model that matches your inverter output).
• Voltage: Rated for AC operation up to 440VAC, compatible with various residential and commercial solar inverter outputs.
• Protection: Fully IP66 rated enclosure – dust-tight and waterproof against heavy jets of water. Ideal for outdoor use in all weather.
• Mounting: Base-mounted design provides extra wiring space and easier termination. Multiple 25mm conduit entries (top & bottom) allow tidy cable management. Can be mounted on wall surface or recessed for a clean installation.
• Standards & Certifications: Compliant with IEC 60947-3 (AS/NZS 60947.3) for AC switches. Approved by CE, RCM and SAA for use in Australia.
• Additional Features: High-visibility ON/OFF indicator and padlockable handle for added safety. Four screws securely lock the cover. The label “A.C. ISOLATOR” and molded “ON/OFF” lever markings ensure clear operation.

Key Features of 

• Outdoor-ready AC isolation switch: IP66-rated waterproof/dustproof enclosure for harsh environments.
• Solar inverter compatible: Designed for AC-side disconnect in solar PV systems (up to 440 VAC).
• Extra wiring room: Base-mount design provides more space for terminations and conduit entries.
• Multiple configurations: Choose 1P or 3P switch, and 35A or 63A current rating, to match system needs.
• Wide current range: Supports 20A through 63A to fit small to large inverter outputs.
• Durable housing: UV-stable, flame-retardant polycarbonate cover prevents sunlight damage and fire spread.
• Easy installation: Flexible mounting (surface or flush) and clear labelling speed up on-site setup.

Main Benefits

Engineers: The BYA-63 AC isolation is fully compliant with IEC/AS standards and has a compact design. Engineers appreciate the precise current/voltage ratings and the thorough documentation (datasheet and installation guide) that simplify specification and design. Clear ON/OFF labeling and lockout capability make it easy to meet safety requirements on schematics and site plans.

Contractors: This switch installs quickly and reliably. Its weatherproof, UV-resistant build means no extra protective housing is needed outdoors. The base-mounted terminals and extra conduit entries cut wiring time and reduce errors. Contractors can match it to any inverter’s AC disconnect requirement, and the lockable handle helps avoid service callbacks.

Homeowners: For a homeowner’s solar setup, the BYA-63 offers long-term durability and simple safety. Its tough enclosure stands up to sun, rain, and dust without rust or fading. In an emergency or service visit, the switch provides a clear and complete shutdown of the PV system. Knowing the isolator is built to strict standards gives installers—and homeowners—peace of mind.

Built to Last: Mechanical & Electrical Durability You Can Count On

One of the standout features of the ZJ Beny BYA-63 AC Isolation Switch is its proven durability in both mechanical and electrical performance. According to the official datasheet, the BYA-63 is rated for 10,000 mechanical operations and 1,500 electrical operations. This makes it one of the most resilient isolators available for solar PV installations in Australia.

Mechanical Life: 10,000 Operations
This rating indicates the number of times the switch can be physically toggled ON and OFF without degradation in performance. A high mechanical life is critical in real-world environments where routine inspections, maintenance, and periodic disconnections are common. Whether used in residential systems or commercial solar arrays, the BYA-63 is built for repeated use over many years.

Electrical Life: 1,500 Operations
Electrical life measures how many times the isolator can make or break a live electrical circuit under load. With a rating of 1,500 cycles, the BYA-63 exceeds typical use expectations for AC isolation in solar energy systems. This ensures that even in demanding conditions—such as inverter shutdowns, grid faults, or maintenance events—the switch will continue to perform reliably.

Together, these ratings underscore the long service life of the product. For installers and engineers, this means less frequent replacements, lower maintenance costs, and greater peace of mind when specifying the BYA-63 for critical applications. It’s not just weatherproof (IP66) and UV-resistant—it’s built to last under real-world electrical stress.

Caveat: The product description and datasheet on this page may not be the most updated version. Please refer to the user manual coming with products if there are conflicts.

ZJ Beny

ZJ Beny (Zhejiang Benyi Electric Co., Ltd) is a leading Chinese manufacturer of PV and electrical switchgear. They specialize in AC and DC isolator switches, circuit breakers, surge protectors, and related products for solar and EV charging systems. With decades of industry experience, ZJ Beny is known for quality and certification.

As an authorized ZJ Beny isolator supplier in Australia, Solar Rains offers their full range of isolators and accessories. Installation manuals and datasheets (the ZJ Beny isolator installation guide) are readily available to help installers fit the switch correctly. ZJ Beny also offers complementary isolator covers and enclosures to suit complex sites – their protective covers are designed to integrate seamlessly with these isolator switches.