Surge Arrester SA-0.5V/10kA+WB for voltage protectionis a designed designed to protect electrical systems from transient overvoltages. It is especially suitable for residential, commercial, and light industrial applications where voltage spikes may occur due to switching operations or lightning strikes. It has fast response time for optimal protection, have minimal power loss during normal operation.
Applications areas:
• Branching points of aerial bundle cables
• Metering systems or distribution boards
• Systems needing overvoltage protection without compromising system design
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-0.5V/10kA+WB
500
1680
10
40
4.5
Components and materials
The low voltage overvoltage surge arresteris produced by Jera Line factory location 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
The SA-0.5V/10kA+WB surge arrester — equipped with a connecting wire for ease of installation — was designed and rigorously tested in Jera Line’s in-house laboratory. It complies with the following international and national standards:
• GB/T 10193-1997 – General requirements for low-voltage surge protective devices
• IEC 1051-1:1991 – Varistor characteristics and test methods
• IEC 61643-11:2010 Clause 8.3.4 – SPD performance evaluation under operating duty
Lab testing Overview:
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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