The Open Top design gives you a clear view of the terminal during insertion, so you can verify the latch has clicked home before the housing is mated.
250VAC rating and UL94 V-0 housing — compliance and enclosure fit
The 250VAC voltage rating covers the typical signal-level circuits in control panels, PLC I/O, and sensor interfaces — it is not a power-distribution rating. The UL94 V-0 polyester housing means the connector can be used inside equipment enclosures where the flame rating of internal components is required by the safety standard. RoHS compliance is confirmed on the part, so it meets the material restriction requirements for equipment sold into the EU and other regulated markets.