Professional ability: Focusing on the lightning protection industry for over 20 years, TAIHANG (Promov) provides world-class OEM/ODM services for global electrical brands, engineering firms, and industrial equipment manufacturers. From initial technical concepts and custom PCB designs to mass production, we deliver comprehensive surge protection solutions tailored to your market requirements.
Team ability:
**R&D Expertise:** 30+ senior engineers specializing in surge & EMP protection, software, SCM, and precision mechanical design.
**Testing Capabilities:** In-house CNAS & ILAC certified laboratory equipped with 10/350µs and 8/20µs surge generators, TOV, EMC, and environmental testing systems.
**Product Coverage:** Type 1/2/3 Power SPDs, 1500V DC Solar SPDs, Signal & Data Line Protectors, SPD Backup Protectors (SSD), and Smart Lightning Monitoring Systems.
**Quality Assurance:** ISO 9001 certified manufacturing featuring automated SMT lines, AGV material transport, and 100% automated end-of-line functional testing.
**Compliance Support:** Complete technical files to assist clients with CE, TÜV, and RoHS certifications.

Mr. Rongbin CHEN

Mr. Bochen LI

Mr. Luhong XIONG

Mr. Qingyong LV

Mr. Jiuxi WANG
Customized case: TAIHANG can customize product solutions for ODM of different types and application scenarios. For example, there is an international manufacturer of petrochemical valves that needs lightning protection for the valves. Previously, surge protector were installed on the outside of the valve products. However, these surge protectors were bulky and inconvenient to install and select. After discussion and communication with the R&D engineers of Taihang, a modular surge protector can be customized developed, which could be embedded inside the valve to solve the customer's problem of selection and installation.
Diversity of products: From the lightning warning system to surge protective device and to the grounding monitoring, Taihang is good at provide comprehensive lightning protection solution according to different industries need.
R&D equipment: TAIHANG is equipped with advanced ILAC & CNAS certified laboratories and testing equipment to support the development and innovation of ODM products. For example: "We are equipped with an advanced lightning simulation laboratory, an environmental laboratory, a TOV laboratory, and an EMC laboratory,etc, capable of simulating various complex lightning conditions and conducting rigorous performance tests on ODM products to ensure their reliability in real-world applications.
Transparent design process: Taihang's product design process is as follows, covering stages from concept design and 3D modeling to prototype production. This allows clients to understand the rigorous design steps in our ODM process, demonstrating professionalism and standardization. For example: *"Our ODM design process begins with in-depth communication with clients to precisely understand their needs, followed by concept design, 3D modeling using professional software, and then prototype production for actual testing, ensuring the accuracy and feasibility of the product design."
1
Customer Requirement Communication
Product specifications, performance parameters, structure, certification requirements and order quantity.
2
Proposal & Quotation Confirmation
Provide technical solution → Issue quotation → Confirm lead time, packaging and LOGO customization.
3
Sample Development & Approval
Mold & sample making → Customer testing & acceptance → Sample confirmation & sign-off.
6
Finished Product Inspection
Function, aging, safety and appearance inspection → Issue test report.
5
Material Sourcing & Production
Procure materials per approved samples → Schedule production → In-process quality control.
4
Contract & Deposit
Sign OEM agreement → Customer pays deposit → Release production order.
7
Packaging & LOGO Customization
Custom packaging, screen/laser LOGO, manual and labels as requested.
8
Final Payment & Shipment
Customer settles balance → Arrange logistics & customs declaration → Delivery.
9
After-Sales & Support
Warranty, technical support, bulk replenishment and long-term partnership maintenance.
Production Equipment and Processes: TAIHANG employs modern production equipment and advanced manufacturing processes, such as automated production lines, AGV (Automated Guided Vehicle) automatic material loading equipment, automated SMT placement equipment, Kanban material management, and lean cell production line layouts. These equipment and processes ensure the precision and stability of every ODM lightning protection product, effectively improving production efficiency and meeting customers' large-volume order requirements.
Quality Control System: Taihang has established an ISO 9001 quality management system, ensuring comprehensive quality control throughout the entire process—from raw material incoming inspection to finished product outgoing testing. We perform 100% inspection on all raw materials and have implemented multiple quality control hold points throughout the production process. The deployment of automated testing equipment enables comprehensive performance testing on all finished products before shipment. Product test data can be uploaded to the customer's cloud portal, allowing clients to monitor product testing status in real time. This ensures product quality while keeping customers fully informed of testing results at every stage.
Frequently Asked Questions (FAQ)
Q1: What international standards do your custom SPDs comply with?
Our OEM/ODM surge protective devices are engineered and tested in full accordance with global standards, including IEC 61643-11, IEC 61643-21, IEC 61643-31 (for PV systems), and CE/EN regulations.
Q2: Can you develop customized embedded SPDs for narrow or compact spaces?
Yes. We specialize in designing ultra-compact and custom-shaped SPD modules tailored to fit specific hardware enclosures, such as industrial valves, outdoor telecom units, and compact IoT gateways.
Q3: How do you protect client intellectual property (IP) during the ODM process?
We sign strict Non-Disclosure Agreements (NDAs) before discussing project details. All customized enclosure molds, firmware codes, and proprietary designs remain exclusively owned by the client.
Q4: What is the typical lead time for custom SPD sample development?
Initial technical proposals are provided within 3–5 business days. Prototype samples typically take 2–4 weeks depending on enclosure mold customization and laboratory testing cycles.
Ready to Develop Your Custom Surge Protection Line?
Get in touch with our engineering team today to request a free technical consultation and project evaluation.
Email:amychen@spd-th.com
Phone / WhatsApp: +86 183 5026 5271