Source AC surge protective devices for commercial and industrial power distribution. THOR works with distributors, panel builders and project buyers, offering product supply and OEM/ODM support. Explore the range or send us your requirements for a quotation.
Type 2 Surge Protection Device Range
Help protect electrical installations and connected equipment from switching surges and induced lightning overvoltages. THOR’s Type 2 SPD range serves commercial and industrial AC distribution, with pluggable models and status indication options for panel installation and maintenance.
Type 1+2 SPDs
Combine Type 1 and Type 2 protection functions in one device. THOR’s Type 1+2 SPD range supports AC distribution projects that specify combined protection, with product documentation and supply support available for your enquiry.

TRS30B+C
SPD type 1+2-surge arrester, MOV+GDT Pluggable module, visual fault signalling

TRS5 Series SPD
SPD type 1+2-surge arrester, MOV Pluggable module, visual fault signalling

TRS5-B+C 275v
SPD type 1+2-surge arrester, MOV Pluggable module, visual fault signalling
Type 1 Surge Protection Device Range
Address lightning-current protection requirements in low-voltage AC installations. THOR’s Type 1 range includes graphite-gap SPDs for projects specifying this protection type. Contact us for product details and a quotation for your distribution or project order.
High-Capacity Type 2 SPDs
For projects specifying higher surge discharge capacity, explore additional Type 2 SPD options within the THOR range. Send us your specification or product requirements to discuss available models and supply.
Tell Us What You Need to Source
Send us a product name, specification or a short description of your application, together with the quantity you need. You do not need to have every detail ready—start with what you know, and discuss your AC SPD requirements with THOR.
Our Services
Installation and maintenance guide
Provide surge protection device installation guide. The installation of surge protectors requires careful planning, strict operation, and compliance with safety and technical requirements.
After-sales service
The after-sales service of surge protectors is an important part of protecting the rights and interests of customers. The company’s after-sales service policy aims to quickly resolve problems encountered by manufacturers or sellers during use.
Make Every Product Carefully
According to the ISO9001 quality management system, the reliability and stability of surge protector production are improved

Automatic soldering

Glow Wire Tester

Lightning wave generator

Production Line

SPD Thermal Stability Tester

Withstand voltage tester
Other Related Products
We provide a full range of lightning protection equipment








