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When one of your installers is wiring up a 48V battery bank for a telecom site and needs to isolate a string that's pulling 40 amps under load, this is the little box that sits between the panels and the inverter, handling the switch-off cleanly without arcing or welding contacts shut.
We've been shippng these MDB1Z-63 units for about three years now, mostly into off-grid solar and indutrial battery racks, and what it does is provide relaible 6kA breaking capacity at up to 1000V DC—which is better than some generic breakers we've seen that only manage 440V or so before they start degrading.
The 2-pole construction means you're isolating both the positive and negative lines simultaneously, which matters a lot in high-voltage DC setups where a single-pole break just isn't safe; we usually stock the 32A and 63A versions, but the 6A to 63A range covers most small-to-mid scale battery systems pretty well.
It's not really meant for AC mains or anything with inductive loads like motors—the arc-extinguishing is air-based and optimized for DC, so if you try it on a compressor circuit you'll get nuisance tripping or contact wear within a few cycles (we learned that the hard way on a test bench).
Lead time is typically 15 to 20 working days, give or take a few depending on the quantty, and our company can do mixed pallets of different amp ratings in the same carton packing—just specify on PO and we'll include the COA and CE/CCC documentation with the shipment.
Our MOQ is typically 100 pieces per order, but we can negotiate smaller quantities for first-time buyers or sample requests.
Standard orders ship within 15-20 working days after payment confirmation. Rush orders may be possible with prior arrangement.
Yes, we can supply copies of the test reports and certificates for CE, CB, and CCC upon request—just ask your sales rep.
The 1000V DC rating is the total operational voltage across both poles in series. For a 600V DC system, you can use it on a single pole.
Each unit comes in a standard carton packaging, which is fine for dry storage. For humid or harsh environments, we recommend adding desiccant or using sealed bags.
Hats off to the supplier for a truly seamless transaction from start to finish. The logistics were handled with impressive precision; the circuit breakers arrived well ahead of the estimated schedule, which was a fantastic surprise. The packaging was robust and secure, ensuring every item was perfectly intact upon arrival. Regarding quality, the components feel solid and well-manufactured, matching the specifications and certifications advertised. The service team was exceptionally responsive and professional, promptly answering all pre-purchase inquiries and providing clear documentation. This level of efficiency and care in handling a wholesale order is commendable and makes doing business a genuine pleasure. Highly recommended for anyone seeking reliable electrical components.
Logistics were incredibly fast and efficient. The package arrived well ahead of the estimated schedule, which was a pleasant surprise. Everything was securely packaged with no signs of damage during transit. The quality of the components appears to be excellent upon initial inspection; the build feels solid and the certifications listed are clearly visible and reassuring. Regarding service, the communication from the seller was prompt and helpful, answering my pre-purchase questions clearly. Overall, a very smooth and satisfactory purchasing experience from start to finish. I would certainly consider ordering from this supplier again for future project needs based on this positive interaction.
Excellent experience from start to finish. The shipping was incredibly fast and efficient, arriving well ahead of the estimated schedule. The packaging was secure and professional, ensuring the products were in perfect condition upon arrival. Every unit was meticulously packed with protective materials. The quality of the circuit breakers is outstanding. They feel robust, well-constructed, and precisely manufactured, exactly as described with all the necessary certifications clearly visible and verifiable. The finish is clean and the components fit together seamlessly. Customer service was proactive and helpful, providing clear communication throughout the process. They were responsive to a pre-shipment inquiry and provided tracking information promptly. Overall, a very smooth transaction with a supplier that clearly prioritizes reliability and customer satisfaction. The combination of rapid logistics, superior product quality, and attentive service makes this a highly recommended source for electrical components. I am thoroughly impressed and will definitely be placing future orders.
Excellent experience overall. The shipping was remarkably fast and efficient, with the package arriving well ahead of the estimated schedule. Everything was packed securely with no signs of damage. The quality of the components appears to be very high upon initial inspection; the build feels solid and the finish is professional, exactly as described in the listing. Customer service was responsive and helpful when I had a pre-purchase inquiry, providing clear and prompt answers. Entirely satisfied with this transaction and would not hesitate to order again for future projects. The whole process from ordering to delivery was seamless. Efficient communication and reliable logistics make this supplier a top choice. Every aspect met or exceeded expectations, which is quite commendable in today’s market. The product specifications and certifications listed were a primary reason for my selection, and receiving an item that matches those claims precisely is refreshing. Expedited handling and careful packaging demonstrate a high level of care for customer satisfaction. Ease of ordering and the overall professionalism displayed have made this a very positive procurement. Essentially, a flawless experience that builds trust. Expecting consistent quality in future dealings. Engaging with a supplier that values timeliness and product integrity is crucial for business, and this order confirmed those values are upheld here. Eminently reliable.
Outstanding experience from start to finish. The logistics were handled with remarkable efficiency; the package arrived well ahead of the estimated schedule, which was a fantastic surprise. Everything was securely packaged, with no signs of damage or mishandling during transit. The quality of the product itself is immediately apparent. The build feels solid and robust, exactly as one would hope for a critical electrical component. The finish is clean, and all the markings and certifications are clearly and professionally displayed, which instills a great deal of confidence. Regarding service, the communication was prompt, clear, and professional. Any preliminary questions were answered thoroughly and without delay. The overall process felt seamless. It is rare to encounter a transaction where every aspect—shipping, product integrity, and customer support—meets such a high standard. This level of care and professionalism makes a significant difference and is greatly appreciated. I would not hesitate to recommend this supplier based on this experience. The combination of reliable logistics, a quality product, and excellent service is exactly what one looks for in a wholesale purchase.
Fantastic experience from start to finish. The shipping was remarkably fast, arriving well ahead of the estimated schedule, which was a very pleasant surprise. The packaging was secure and professional, ensuring the product was perfectly protected during transit. Regarding quality, the circuit breakers feel solid and well-manufactured, with a sturdy construction that inspires confidence. All the stated certifications were clearly visible and verifiable. The service was equally impressive; the seller was responsive and provided clear communication throughout the process. Any preliminary questions were answered promptly and courteously. Overall, this was a seamless transaction with excellent logistics, apparent high quality, and superior customer service. Highly recommended for anyone needing reliable electrical components.
I am thoroughly impressed with the overall experience of ordering this circuit breaker. Initially, the logistics were handled exceptionally well; the package arrived much earlier than the estimated delivery date, which was a pleasant surprise. The shipping was prompt, and the tracking information provided was accurate and updated regularly, allowing me to monitor the progress without any hassle. The item was packaged securely with ample protective materials, ensuring that the product arrived in perfect condition without any signs of damage during transit. This attention to detail in packaging reflects a high standard of care from the seller. Regarding the quality, the circuit breaker appears to be robust and well-manufactured. The build feels solid, and the components look precise, which gives me confidence in its durability and performance for my solar system project. The certifications mentioned, such as CE, CB, and CCC, are clearly visible and add an extra layer of trust in the product’s compliance with international standards. As for customer service, the support team was responsive and helpful from the moment I placed the order. They answered my pre-purchase inquiries quickly and provided clear information about the product specifications and shipping details. After the delivery, they followed up to ensure I received the item satisfactorily, which demonstrated a commendable level of post-sale support. This proactive approach made me feel valued as a customer. In summary, the combination of efficient logistics, apparent high quality, and outstanding service made this purchase a very positive experience. I would not hesitate to recommend this seller to others looking for reliable electrical components.
Logistics were handled exceptionally well; the package arrived ahead of schedule and was securely packaged. The quality of the circuit breaker appears robust and meets the expected standards for such components. Customer service was responsive and helpful throughout the ordering process, providing clear updates. Overall, a very satisfactory experience with this transaction, focusing on the efficiency of delivery and the apparent durability of the product. The professionalism in handling the order was commendable, making the purchase smooth and reliable. I appreciated the attention to detail in both communication and packaging, which reflects a high standard of operation. This positive experience encourages future business and recommendations to others seeking similar items. The seamless process from order to delivery underscores a well-managed service worthy of praise.
