Stainless Steel Case Dry DC Filter Capacitors

◆ Product Advantages
- Stainless Steel Case with Outstanding Corrosion Resistance: Premium stainless steel housing provides far superior acid-alkali and salt-spray corrosion resistance compared to aluminum or plastic case products, particularly suitable for variable frequency and inverter equipment in strongly corrosive environments such as the chemical industry, marine, and high-humidity applications, ensuring long-term stable operation under extreme conditions
- High Mechanical Strength with Vibration and Impact Resistance: Excellent mechanical strength of stainless steel housing withstands high-vibration and strong-impact operating conditions, meeting the mechanical reliability requirements of demanding applications such as offshore wind power, marine electrical systems, and industrial heavy-duty equipment
- Low ESR with High Ripple Current Handling Capability: Extremely low equivalent series resistance sustains significant ripple currents in DC filter circuits, effectively reducing inverter switching losses and improving overall system energy efficiency
- Low Inductance (Ls) for High-Frequency Interference Suppression: Non-inductive winding structure minimizes parasitic inductance, effectively suppressing high-frequency switching noise and voltage spikes, protecting the long-term reliability of IGBT and other power switching devices
- Reliable Self-Healing with Long-Life Design: Metallized film self-healing characteristic provides rapid self-repair capability after occasional over-voltage events; combined with the high durability of the stainless steel housing, this achieves an exceptionally long service life

◆ Key Selling Points
- Corrosion and Weather Resistant — Preferred Solution for Harsh Environments: Ideal choice for DC filtering in highly corrosive applications including offshore wind power, coastal photovoltaic installations, marine electrical systems, and chemical plants, with service life far exceeding aluminum case counterparts
- Fully Sealed Dry-Type Structure with Zero Leakage Risk: No liquid dielectric completely eliminates leakage contamination, with extremely low maintenance costs and suitable for maintenance-free system designs
- Wide Coverage Across Multiple Industrial Applications: Compatible with IGBT power modules, wind and solar inverters, electric vehicle drives, and welding equipment — a single product meeting requirements across multiple fields
- Customization Support Available: Housing dimensions, voltage rating specifications, and terminal configurations can be customized according to customer requirements to meet different system integration needs

◆ Primary Applications
- DC bus filtering for offshore wind power and coastal photovoltaic inverters
- DC filtering for marine electrical power systems
- Variable frequency drive equipment in chemical and metallurgical industries
- Snubber and filter capacitors for IGBT power modules
- Inverter power supplies for electric vehicles and industrial welding machines

Q: Which markets does the product mainly export to?

Our products are sold worldwide to 30+ countries and regions, including the United States, Germany, Japan, Spain, Italy, the United Kingdom, South Korea, Australia and Canada, etc.

Q: How to arrange the transportation of goods?

The main mode of transportation is by sea, which is convenient and efficient. If urgent delivery is required, we can also arrange air transportation through the Ningbo or Shanghai airports.

Q: What are the payment methods available?

During the quotation process, the trade terms (such as FOB, CIF, etc.) will be confirmed. For mass production, a 30% advance payment is usually required, and the remaining amount will be paid upon presentation of the copy of the bill of lading. The main payment method accepted is T/T, and L/C can also be negotiated for use.

Q: How to ensure product quality?

We implement full-process quality management. After each process, there is an inspection. The finished products are 100% subject to final inspection in accordance with customer requirements and international standards.

Q: What is the size of the company and its personnel structure?

The company currently has over 300 employees, among whom there are about 10 professional technicians.

Q: Do you support customized production?

Customized production is our core business. We can develop and manufacture according to the drawings or samples you provide.

Q: Are you a factory or a trading company?

We are a direct manufacturer with independent production capabilities. We also have an international sales department to provide a complete service from production to export.

Q: How soon can I receive a reply after making an inquiry?

We attach great importance to every inquiry. We will reply within 12 hours after receiving the quotation.