Solve the problem of high current instead of waterproof automobile fuse holder, waterproof fuse holder wire harness fuse base. Huizhou HINEW electric appliance collects and collates some necessary knowledge points to present to you. I hope it helps you.

Waterproof fuse holders are commonly used in the market (large, small, medium).

The advantages of waterproof automobile fuse seat: convenient wiring, waterproof.

Weakness: we all think that the current can be too large dozens of amperes, in fact, it is a misunderstanding. The waterproof automobile fuse seat material is molded by PVC material.

What is pvc material

PVC is PVC, which is an amorphous white powder with a small degree of branching and a relative density of about 1.4. it begins to decompose at a glass transition temperature of 77-90 ℃ and begins to decompose at about 170C. It has poor stability to light and heat. When it is above 100C or exposed to sunlight for a long time, it will decompose and produce hydrogen chloride, and further automatically catalyze decomposition, resulting in discoloration and rapid decline in physical and mechanical properties. In practical application, stabilizers must be added to improve the stability to heat and light. PVC cannot be said to be plastic, but should be said to be the main component of plastic. Generally speaking, plastic refers to PVC material. PVC material, namely PVC, is one of the largest plastic products in the world. It is cheap and widely used. PVC resin is a white or light yellow powder, which can not be used alone and must be modified. If you look at the above, you will know the result (PVC is not resistant to high temperature, high current, high working temperature for a long time, it will melt down for a long time) the spontaneous combustion of the car is thus produced, and the unit price is low. That is, small signals can use this structure. Large signal waterproof car fuse seat is prone to a lot of hidden dangers.

Characteristics of waterproof automobile fuse seat

1. Mechanical properties: high strength, fatigue resistance, dimensional stability, small creep (rarely changed at high temperature).

2. Heat aging resistance: the enhanced UL temperature index reaches 120,140C (outdoor long-term aging is also very good).

3. Solvent resistance: non-stress cracking.

4. For water stability: PBT is not easy to decompose in the presence of water.

5. Electrical performance:

Insulation performance: excellent (humidity, high temperature can also maintain stable electrical performance, is an ideal material for the manufacture of electronic and electrical parts).

Dielectric coefficient: 3.0-3.2.

Arc resistance: 120s.

Molding processability: ordinary equipment injection or extrusion. Because of the fast crystallization rate and good fluidity, the mold temperature is lower than that of other engineering plastics. It takes only a few seconds to process thin-walled parts and 40-60s for large parts.

6. Application of PBT (usually refers to modified varieties).

Electronic and electrical appliances: connectors, switch parts, household appliances, accessories parts, small electric covers or (heat resistance, flame retardancy, electrical insulation, molding processability).

Car:

a. External parts: mainly include corner Geshan, engine heat release hole cover, etc.

b. Internal parts: mainly endoscopic stays, wiper braces and control system valves.

c. Automotive electrical parts: automobile ignition coil twisted tube and all kinds of electrical connectors, etc.

(the number of PBT used in cars is less than that of nylon, polycarbon and polyformaldehyde, but with the emergence of low warping PBT, it will be more widely used in auto parts in the future.).

7. Mechanical equipment: video tape recorder belt drive shaft, computer cover, mercury lampshade, electric iron cover, roaster parts, as well as a large number of gears, cam, buttons, electronic watch housing, camera parts (with heat resistance, flame retardant requirements).

We all understand why the excessive current of our products can replace the waterproof car fuse seat, and we all understand the quality of the material.