According to the diagram test the main design size: 28-54-100

● Detection tool:0.02 caliper or micrometer.

● Indicate the code for inspection.

● Plane does not allow significant steps,smooth and unobstructed,no significant warp.

● no residual shape or damage,color is no different normal

● finish up to▽7 or more,does not allow harmless scars and miniature.

● Metal-free impurities or other debris,containing metal,debris products,must be waste separation.

● no melting marks,no internal pores bright spots.There are stomata bright spots(excluding traces of melting marks)for products such as the outer product.

● no flash,burr and excess material.

● feel a strong elasticity,and not brittle.

● Selection of raw materials must meet the requirements of the EU ROHS directive,and has UL yellow card certification and fixed-point supply.

● thermal deformation temperature≥100 degrees Celsius,flame retardant UL94Vo level/0.8-3.2mm.

● other structures should meet the transformer manufacturing process as the standard.