Surge Arrester SA-0.66V/5kA+WBis a designed to protect electrical and electronic equipment from transient overvoltages caused by lightning or switching surges. Its key features include a voltage rating of 0.66 kV (660 V nominal voltage), a surge current capacity of 5 kA, and additional integrated features like wiring/buzzer alarm (WB).
Applications:
•Residential and Commercial Power Distribution:voltage surges caused by lightning or switching operations.
•Control Panels and Instrumentation:
•Protects sensitive control systems, control panels, and instrumentation devices against high-voltage transients ensuring reliable operation.
•Lighting Systems:Installed across lighting circuits to prevent overvoltage damage from lightning surges or switching events.
•Industrial Equipment:Used in various industrial control systems and automation equipment where surge protection is critical.
Technical specification
Product name
Max allowable voltage, V
Voltage protection level, V
Nominal discharge current, kA
Maximum discharge current, kA
Short-circuit withstand capability, kA
SA-0.66V/5kA+WB
660
2465
5
35
4.5
Components and materials
The low voltage overvoltage surge arresteris produced by Jera Line factorylocation in China, the product included the following main parts:
Component
Description
Metal Oxide Varistor (MOV)
The heart of the arrester — absorbs surge energy by clamping voltage rapidly.
Electrode Contacts
Made from copper or nickel-coated brass, used for efficient current flow.
Enclosure (WB casing)
Weatherproof polymer housing — typically UV-resistant and flame-retardant.
Thermal Disconnect Device
Disconnects the arrester when overheated or after end-of-life surges.
Insulation Layers
Ensures dielectric strength between internal elements and external surface.
Mounting Hardware
Screws, brackets, or DIN rail clips for easy installation.
Test
Low voltage surge arrester SA-0.66V/5kA+WB, surge arrester with connecting wire was tested in Jera Line in-house laboratory, according to
It was designed and tested according to standards such as GB/T 10193-1997, IEC 1051-1:1991, IEC 61643-11:2010 (clause 8.3.4.)
Below are some tests we did:
Test Name
Description
Varistor DC Current Parameter Test
Measures DC leakage current and voltage clamping behavior under low-voltage conditions.
Modified Operating Duty Test
Simulates real-world overvoltage scenarios to validate energy absorption capability and thermal stability.
PRODUCT VIDEO
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