Fast Melting DC Fuses for EVs and Energy Storage - Top China Suppliers & Factory Compliance with IEC Standards
Products Description
Normal working conditions
The upper limit of ambient air temperature shall not exceed 75 ℃; The lower limit of ambient air temperature shall not be lower than -40 ℃; The altitude of the installation location shall not exceed 3500m (if you want to exceed this value, please specify the requirements, and our company can design and develop according to customer requirements), relatively the air humidity should not exceed 90%.
Usage category
AR "represents the use of fast DC fuses for new energy protection.
Structural characteristics
The variable cross-section melt made of silver is encapsulated in a high-strength melt tube, which is filled with chemically treated high-purity quartz sand and special treatment chemicals are used as arc extinguishing media, and the two ends of the melt are firmly connected to the contacts through spot welding.
Short circuit melting characteristics
The fuse melts within 6 seconds when subjected to 4 times the overload current, and within 0.02 seconds when subjected to 8 times the overload current. The fuse is prone to short circuit protection as it melts within 0.005 seconds when subjected to 20 times the overload current.
Detail Pictures
Frequently Asked Questions
What are the ambient temperature limits for these fuses?
The ambient air temperature must remain within the range of -40 ℃ (lower limit) to 75 ℃ (upper limit) for normal working conditions.
Can these fuses be used at altitudes exceeding 3500m?
Yes. While the standard installation altitude limit is 3500m, our company can custom design and develop products to meet higher altitude requirements upon request.
What does the "AR" usage category signify?
The designation "AR" indicates that these are fast-acting DC fuses specifically engineered for new energy protection applications.
How are these fuses structured internally?
They consist of a silver variable cross-section melt encapsulated in a high-strength tube filled with high-purity quartz sand and arc-extinguishing chemicals, with ends spot-welded to the contacts.
What are the short-circuit melting response times?
The fuse melts within 6 seconds at 4 times overload current, within 0.02 seconds at 8 times overload, and within 0.005 seconds at 20 times overload for rapid short-circuit protection.