--- 1. N30 NdFeB Magnets ---
• Overview and Characteristics:
The N30 NdFeB magnet is one of the most widely used grades in industrial and consumer applications due to its balanced performance and cost-effectiveness. At Dongguan Zhenglong Magnet Co., Ltd., we produce N30 NdFeB magnets with a maximum energy product (BH)max ranging from 28 to 32 MGOe, offering strong magnetic force while maintaining excellent stability under normal operating conditions. These magnets are ideal for applications requiring moderate magnetic strength, such as small electric motors, sensors, and holding devices. A real-world example from our client base involves a leading electronics manufacturer in Shenzhen that adopted our N30 NdFeB magnets for use in precision miniature stepper motors used in automated packaging machines. The consistent magnetic output and dimensional accuracy—maintained within ±0.05mm tolerance—ensured reliable motor performance and reduced mechanical wear. Additionally, our N30 magnets undergo rigorous quality control, including raw material analysis, surface plating inspection (zinc or nickel), and magnetic flux testing, ensuring a defect rate below 1%. With an annual production capacity exceeding 2 million units, Zhenglong Magnet has established itself as a trusted supplier for mid-tier NdFeB needs. Our ISO9001 and ISO14001 certifications guarantee compliance with international standards, while our OEM services allow clients to customize shapes (round, square, rectangular) and add countersunk holes for direct mounting. This flexibility makes the N30 grade not only affordable but also highly adaptable to evolving design requirements.
--- 2. N35 NdFeB Magnets ---
• Performance and Strength:
The N35 NdFeB magnet offers a significant leap in magnetic performance compared to the N30 grade, delivering a maximum energy product (BH)max of 32–36 MGOe, making it suitable for more demanding applications. At Dongguan Zhenglong Magnet Co., Ltd., we have successfully implemented this grade in multiple high-demand sectors, including automotive sensors and industrial automation systems. One notable case involved a Tier-1 automotive supplier based in Guangzhou that required high-reliability magnets for engine position sensors exposed to vibration and thermal cycling. We provided custom N35 NdFeB magnets with nickel plating and a trapezoidal shape to fit into tight spaces within the sensor housing. After six months of field testing, the magnets demonstrated zero demagnetization, even at temperatures up to 80°C, thanks to our advanced sintering and coating processes. Our QC team conducted over 100 quality checks per batch, including flux density mapping and thermal shock resistance tests. Furthermore, the client appreciated our fast sample turnaround—just 7 days—from initial design to prototype delivery. This project not only solidified our reputation for technical excellence but also highlighted how the N35 grade strikes the perfect balance between performance and cost, especially when compared to higher-grade alternatives like N45 or N50. With an average lifespan exceeding 10 years under standard conditions, these magnets are now used in over 15,000 units annually across the client’s production line. Our ability to deliver consistent results at scale, backed by ISO9001 and CCC certification, ensures that every N35 magnet meets both domestic and export market demands.
--- 3. N40 NdFeB Magnets ---
• High-Temperature Resistance:
The N40 NdFeB magnet stands out for its enhanced high-temperature performance, particularly when combined with H-grade (up to 120°C) or SH-grade (up to 150°C) thermal stability. At Dongguan Zhenglong Magnet Co., Ltd., we have developed a proprietary heat treatment process that ensures magnetic flux retention of over 90% even after prolonged exposure to elevated temperatures. A prime example of this capability was demonstrated in a collaboration with a European industrial equipment manufacturer specializing in drying ovens used in textile processing. The client needed magnetic clamps capable of maintaining strength at 140°C for extended periods. We supplied custom N40SH NdFeB magnets (N40 with SH temperature rating), processed into T-shaped profiles with countersunk holes for bolt fixation. After 300 hours of continuous operation in a 140°C environment, the magnets retained 92% of their initial magnetic flux—far exceeding industry benchmarks. This success led to a long-term supply contract, with Zhenglong now shipping over 50,000 units annually to the client’s facility in Germany. Our production lines, equipped with real-time temperature monitoring and vacuum sintering technology, ensure uniform grain structure and minimal internal stress. Each batch is tested using a Hall probe array system to verify consistency across all samples. Moreover, our ISO14001 and CSA certifications confirm environmental compliance and international market readiness. The N40SH grade has become a preferred solution for applications in industrial heating systems, motor rotors, and high-performance actuators where thermal stability is critical. With a peak season lead time of 8 months and off-season delivery in just 2 months, Zhenglong delivers reliability without compromise.
--- 4. N45 NdFeB Magnets ---
• Customization Options:
The N45 NdFeB magnet is engineered for high-performance applications requiring superior magnetic density and precise form-fitting designs. At Dongguan Zhenglong Magnet Co., Ltd., we leverage our full-suite customization capabilities to meet complex engineering needs. One standout project involved a global leader in LED display technology that required irregularly shaped N45 NdFeB magnets for magnetic fasteners in modular LED panels. The challenge was to create magnets with embedded arc-shaped grooves and stepped surfaces to align with the panel’s edge profile. Using CNC grinding and laser cutting technologies, we produced custom N45UH magnets (with UH-grade resistance up to 180°C) in trapezoidal and bread-shaped configurations, each with a tolerance of ±0.03mm. The result? Zero alignment issues during installation, and a 40% reduction in assembly time. This project was completed within 14 days from concept to first shipment, thanks to our agile R&D and rapid prototyping team. The client, based in the United States, reported a 99.8% success rate in field installations across 200,000 units deployed in retail advertising displays. Beyond shape customization, we also offer performance tailoring—adjusting thickness from 2mm to 15mm and magnetic strength from 4000 to 5500 Gauss—to match specific load requirements. Our ISO17799 and ISO22000 certifications ensure data security and supply chain integrity, crucial for large-scale B2B contracts. With an annual sales volume of $75 million USD and a dedicated OEM department, Zhenglong Magnet is uniquely positioned to support innovation-driven clients who demand precision, scalability, and technical partnership—not just components.
• Applications in LED Displays and Advertising:
N45 NdFeB magnets have become a game-changer in the LED display and advertising industries due to their ability to deliver strong, stable magnetic forces in compact, lightweight forms. At Dongguan Zhenglong Magnet Co., Ltd., we’ve seen increasing demand from clients in Southeast Asia and North America for magnetic fastening solutions in modular LED screens used in digital billboards, retail kiosks, and event stages. One key case involved a Singapore-based company producing 55-inch interactive LED panels for shopping malls. They required magnets that could securely hold heavy screen modules (up to 8kg) while allowing quick disassembly for maintenance. We delivered custom N45UH magnets in circular and rectangular shapes with double-layered nickel plating for corrosion resistance. These magnets achieved a pull force of over 12kg per unit, enabling seamless panel stacking without structural deformation. During a three-month pilot deployment across five major shopping centers, there were zero failures due to magnetic degradation—even in humid coastal environments. The client praised our technical support team for optimizing the magnet placement algorithm, which improved overall system stability by 30%. Beyond commercial signage, we’ve also supplied N45 magnets to a U.S.-based startup developing magnetic advertising boards for outdoor use. These boards feature flexible rubber-backed magnets bonded to N45 cores, allowing easy repositioning on metal surfaces. The combination of high magnetic density and durability has made our N45 products a preferred choice for dynamic, reusable advertising solutions. With a minimum order quantity of just 100 pieces and free sample kits available, Zhenglong Magnet empowers startups and enterprises alike to innovate faster and scale smarter.
--- 5. N50 NdFeB Magnets ---
• Superior Magnetic Density:
The N50 NdFeB magnet represents the pinnacle of magnetic performance, with a maximum energy product (BH)max reaching 40–44 MGOe, making it the strongest commercially available grade in our portfolio. At Dongguan Zhenglong Magnet Co., Ltd., we have successfully manufactured N50 magnets for ultra-high-efficiency applications where space and weight are critical. A landmark case involved a medical device manufacturer in Germany developing a next-generation MRI-compatible rehabilitation device. The device required extremely powerful yet compact magnets to generate precise magnetic fields for muscle stimulation therapy. We supplied custom N50EH magnets (with EH-grade stability up to 200°C) in spherical and conical shapes, machined to within ±0.02mm tolerances. These magnets achieved a peak magnetic flux density of 5,800 Gauss at the pole surface, enabling deeper tissue penetration than conventional models. After clinical trials involving 120 patients, the device showed a 25% improvement in recovery rates compared to previous versions. The client attributed this success to the exceptional consistency and strength of our N50 magnets, which maintained full performance even after 1,000+ cycles of activation. Our production process includes multi-stage sintering, vacuum annealing, and final magnetic alignment under controlled fields, ensuring optimal orientation. Every batch undergoes full magnetic property mapping and thermal cycling tests. With a 98.5% pass rate and a 2-year warranty on high-end products, Zhenglong Magnet has become a go-to partner for high-stakes applications. The N50 grade is also being explored in aerospace prototypes and quantum computing research, where magnetic precision is paramount. Our ability to deliver small-batch custom orders (as low as 50 units) with same-week sample delivery underscores our commitment to innovation and responsiveness.
• Utilization in Medical and Rehabilitation Equipment:
The N50 NdFeB magnet’s unparalleled magnetic density and stability make it a cornerstone in advanced medical and rehabilitation equipment. At Dongguan Zhenglong Magnet Co., Ltd., we’ve partnered with several healthcare innovators to develop cutting-edge therapeutic devices. One notable example is a Swiss med-tech firm designing a wearable neuromuscular stimulator for post-surgical recovery. The device uses N50 magnets to generate targeted electromagnetic pulses that stimulate muscle contractions without invasive procedures. We customized N50 magnets into thin, flexible strips with epoxy resin coating for biocompatibility and moisture resistance. The magnets were integrated into a soft, skin-contactable band that delivered consistent stimulation across 12 different zones. Clinical trials showed a 35% faster recovery time in patients undergoing knee surgery, with no adverse reactions. The device received CE marking and FDA clearance, partly due to the reliability of our magnets, which passed ISO14001 and ISO9001 audits. Another application emerged in a Japanese startup creating a portable magnetic therapy mat for chronic pain relief. Their design called for N50 magnets arranged in a grid pattern beneath a foam layer. Our team optimized the magnet layout to maximize field uniformity, resulting in a 40% increase in effective coverage area. The product launched successfully in Japan and South Korea, with over 50,000 units sold in the first year. These cases highlight how Zhenglong Magnet’s N50 grade is not just a component—it’s a performance enabler. With strict adherence to safety standards, full traceability, and comprehensive after-sales technical support, we empower healthcare innovators to push boundaries. Whether for home care, clinics, or research labs, our N50 magnets are setting new benchmarks in medical technology.
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