UL1977 Temperature Rise Test Standard

September 5, 2023

Latest company news about UL1977 Temperature Rise Test Standard

UL1977 Temperature Rise Test Standard


UL 1977 is a safety assessment standard primarily designed for commercial or household use, used for data, signal, control, and power transmission connectors within or between electronic devices. The UL1977 certification of connectors requires temperature rise testing. Next, we will introduce the UL1977 temperature rise testing standard.

Xiangqian Electric Co., Ltd. specializes in the production of LED waterproof plug connectors, street lamp module junction boxes, industrial control waterproof male and female connectors, photovoltaic aviation plugs, new energy wire and cable extrusion, large-scale injection molding, hardware manufacturing, and dual production bases. We can customize according to drawings and samples, and meet the UL1977 temperature rise testing standards of national high-tech enterprises


UL1977 Temperature Test Standard


1. Layout: The temperature rise test points should be arranged at the terminal (wiring terminal). When the contact terminals of the product have crimping and board connection, the crimping terminal can be replaced by a board connection terminal.


2. All terminals with the same current must be connected in series to form a circuit to pass the same current.


3. Use the smallest wire diameter to connect the maximum number of terminals in series for testing.


The ambient temperature for testing is 25 ± 5 ° C.


When multiple terminals of the product have different currents, the testing circuit for each terminal needs to be separated and conducted simultaneously.


6. The maximum temperature tested should not exceed the RTI value of the plastic material.


7. The testing time is 4 hours. When the temperature rise data is last 15 minutes, it should be read every 5 minutes, and the three consecutive readings should be consistent.


8. Type 0 and Type 1A products may not undergo temperature rise testing without specifying the current.