Engineering Precision Electrical Protection Since 2001
Zhejiang TMB Electric Co., Ltd. operates from a specialized 5,700 m² manufacturing plant located in Huabei Village, Liushi Town, Wenzhou — recognized as China's epicenter for low-voltage electrical apparatus. With over two decades of engineering development and manufacturing practice, we have evolved into an integrated production and export hub catering to global panel builders, EPC contractors, and electrical distributors across more than 100 countries.
Our core capabilities encompass the complete manufacturing cycle: precision injection molding, multi-pole automated switch assembly, automated pad printing, laser marking, and 100% rigorous power-on quality inspection. Backed by an ISO 9001 quality management framework and an on-site verified TÜV Rheinland supplier audit, we ensure stable mechanical endurance, precise trip characteristics, and reliable delivery for international procurement programs.
Factory Benchmark Data
- Verified Business TypeCustom Manufacturer
- Operational Years24 Years (Since 2001)
- Total Floor Space5,700 m²
- Total Verified Workforce92 Production & Engineering Staff
- R&D Engineering Team6 Senior Electrical Engineers
- QA/QC Inspectors6 Dedicated Checkpoint Inspectors
- Export Experience14+ Years International Trade
- Annual Verified ExportUS$ 3,304,733
- On-Time Dispatch Rate97.4% Track Record
- Export Shipping PortNingbo Port / Shanghai Port
Core Factory Capabilities
Combining automated machinery with strict engineering standards to provide flexible customization, fast prototype turnaround, and dependable volume manufacturing.
Customization (OEM / ODM)
Engineered to adapt to international grid specifications, solar string designs, and distributor private label branding.
- Sample processing and functional prototype build
- Custom current ratings (1A–125A) and voltage curves
- Custom pre-wired PV combiner boxes (1-in-1-out to multi-strings)
- Laser-engraved logo, custom packaging, and graphic branding
Modern Production Workshop
12 structured assembly lines equipped with 19 specialized manufacturing machines ensuring high repetitive accuracy.
- Precision thermoplastic injection molding machines
- Automated switch mechanism assembly lines
- Pneumatic riveting & wire winding machinery
- Automated blister packaging & vacuum forming units
Quality Control & Testing
Stringent multi-tier verification ensuring full adherence to IEC and EN electrical safety standards.
- Power-on aging test bench for digital display meters
- Dual power ATS switching and endurance test stations
- Self-recovery over/under voltage protector power-on benches
- Dielectric strength and thermal-magnetic trip calibration
Workshop Machinery & Manufacturing Stations
Real-world glimpses into our 19 specialized industrial machine units driving high precision and stable component yield.
Automated Switch Assembly Line
Fully Automatic Pad Printing Machine
Automatic Laser Marking Machine
Precision Injection Molding Machine
Pneumatic Riveting Machine
Coil & Wire Winding Machine
Vacuum Forming Machine
Ultrasonic Plastic Welding Equipment
Certified Quality Management & Compliance
Zhejiang TMB Electric Co., Ltd. operates in full conformance with international safety directives. Each product family undergoes third-party lab verification before batch rollout.
Quality Management System
Certified for production, assembly, and sales of circuit breakers, PV combiner boxes, distribution boxes, and meters.
DC Molded Case Breakers (MCCB)
Verified compliance with European Low Voltage Directive and IEC 60947-2 standards for heavy-duty DC protection.
Miniature Circuit Breakers (MCB)
Complies with EN 60898 overcurrent protection specifications for AC residential and commercial boards.
Solar PV Combiner Box
Low-voltage switchgear assembly testing ensuring IP65 weatherproof integrity and surge-withstand capability.
DC & AC Surge Protective Devices
Tested performance under IEC 61643 criteria for Type 2 surge arresters protecting solar inverters and AC panels.
Dual Power Transfer Switch (ATS)
Validated seamless transfer performance between utility mains and backup generators under inductive load.
Digital Energy Meters & Smart Relays
Certified accuracy benchmark for DIN rail kWh metering, automated timers, and voltage monitor relays.
Environmental Safety Conformity
Full restriction compliance on hazardous chemical substances across all plastic casings and copper contacts.
International Export Footprint
Over 14 consecutive years of direct export experience supplying electrical engineering distributors, solar installers, and wholesalers across key regional markets.
Ready to Source Directly from the Manufacturer?
Whether you require standard catalog models with MOQs starting from 5 pieces, complete OEM customized ratings, or tailored PV combiner box configurations, our engineering and export team is ready to assist with detailed specs and competitive quotes.
Send an Inquiry