The critical note on this part: contacts are not included.
Mating Half and Terminal Selection
This receptacle mates with any SL-series male header that has 4 circuits in a dual-row, 0.100" pitch layout.

Molex SL 70450 receptacle housing, 0022552041, 4 positions, 2 rows, 0.100" (2.54mm) pitch, free-hanging, crimp termination, black, contacts not included.
| Parameter | Value |
|---|---|
| Series | SL 70450 |
| Type | Female Socket |
| Mounting | Free Hanging (In-Line) |
| Connector type | Receptacle |
| Operating temperature | -40°C ~ 105°C |
| Color | Black |
| Insulation material | Polyester, Glass Filled |
| Note | Contacts Not Included |
| Pitch | 0.100\" (2.54mm) |
| Package | Bulk |
| Row spacing | 0.100\" (2.54mm) |
| Rows | 2 |
| Contact termination | Crimp |
| Positions | 4 |
The critical note on this part: contacts are not included.
This receptacle mates with any SL-series male header that has 4 circuits in a dual-row, 0.100" pitch layout.
No — the listing explicitly notes that contacts are not included. You must order the matching female crimp terminals separately.
It mates with any SL-series male pin header that has 4 circuits in a dual-row, 0.100" pitch layout.
Both the pitch and row spacing are 0.100" (2.54mm), which is standard for the SL series.
Yes, it is ROHS3 compliant.