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The UL Yellow Card (or Plastic Identification Program) provides a digital product information card that lists the substantial safety and performance-related attributes of polymer materials that UL tests to meet applicable standards. When a polymer material receives a UL approved component mark, UL automatically issues a yellow card. Additional UL white cards provide information about tests performed in accordance with international standards (ISO, IEC).
One. Terminology in UL Yellow Card: (Applicable to the production of core body for the manufacture of circular connectors)
1. Color
The color NC is a natural color, and the natural color (color without coloring) ALL is all colors.
2. Min. Thick.
The minimum thickness of the specimen, in mm.
3.Flame Class
Flame retardancy Is based on the UL94 standard to determine the flame retardancy level of the material. In the order of HB, V-2, V-1, V-0, the flame retardancy increases sequentially.
4. HAI
The flare of the high-current arc causes the high-current arc to fly next to the test piece. The flame retardancy of the material is graded according to the number of flights required until combustion. The smaller the level number, the more difficult it is for the material to burn. (Under high-frequency arcs, how many arcs will ignite the plastic parts.) )
5. HWI
The fiery nature of hot wire is an acronym for Hot wire ignition. The nickel wire is wound around the test piece so that the specified current passes through it. According to the time to start combustion, the flame retardancy of the material is graded. The time to start burning is 1 to 2 minutes. The time to start burning is 7 to 15 seconds, which is level 4. The higher the number of levels, the easier it is for the material to burn. (Simulates the electrical combustion grade of plastic parts.) Its value must be less than 4 3 2 below)
6. CTI
Compared with the leakage detection index, it is an acronym for the Composite tracking index, which is an indicator of leakage resistance. In the state of applying a voltage to the surface of the insulator, the electrolyte drips on the surface of the molded product between the electrodes, and the leakage damage does not occur until the voltage is evaluated. Graded according to the withstand voltage value from 0 to 5. The smaller the number, the higher the leakage resistance. (In the contaminated environment, how many volts of voltage will be turned on, simulating how many volts of voltage the plastic part can withstand in the contaminated environment.) ）
7．RTI
The relative guaranteed temperature, also known as the "relative temperature index", is the maximum temperature used by the UL guarantee material. The unit is °C. RTI Elec means TI guaranteed temperature for electrical characteristics); RTI imp indicates TI when there is an impact load; RTI str represents TI under static.
The minimum rating of the insulation material should meet the requirements of Typo 7.1 Table I, of which TIPO 0 products have no requirements for flame retardant grade, and others must reach HB or above, and its temperature requirements RTI value cannot be less than 50.
Exception: When the product is UL certified, when the thinnest place of the measured product is smaller than the insulation material UL yellow card on the Min. Thick. (Minimum thickness of the specimen), a 12mm flame height combustion test is required to determine the flame retardant requirements according to the UL 746C standard.
Three. Current-Carrying Parts
Some requirements and defining words in the current-carrying assembly:
(1) Current-carrying components are mainly electroplated/unplated copper or copper alloys.
(2) Note that iron and steel are not available, whether electroplated or unplated.
(3) The current-carrying part needs to be fixed.
Terminal Contacts terminal end (i.e. crimping site)
Contact the pairing point for contact terminals
Four. Non-current-carrying parts: (Grounding & Dead-Metal Parts)
Some of the requirements and definitions in the non-current-bearing part:
(1) Iron non-charged metals in non-current-carrying parts need to be plated, and the coating can prevent corrosion.
(2) The grounding terminal must be copper or copper alloy.
(3) Ground terminal First in last-out. (The ground terminal must be longer than the charged terminal and must be contacted first)
Five. Insulation distance: (Spacing)
When the rated voltage ≤ 250v, the minimum distance of the insulation spacing is 1.2mm
When the rated voltage > 250v, the minimum distance of the insulation spacing is 3.2mm
Type0 products have no requirements for insulation distance. (UL1977 standard only)
Exception: When the minimum spacing of the product is less than the above, it is necessary to do a withstand voltage test, if the withstand voltage test passes. The product can meet the requirements.
