Can I connect RJ45 to Molex 4-pin?

RJ45 and Molex 4-pin are not directly compatible.

Do I need an adapter for RJ45 to Molex 4-pin?

No, RJ45 and Molex 4-pin can be connected directly without an adapter.

Will connecting RJ45 to Molex 4-pin cause signal loss?

No significant signal degradation is expected when connecting RJ45 to Molex 4-pin.

RJ45 ↔ Molex 4-pin

Compatibility check and signal path analysis

Adapter Required

These connectors are not directly compatible. An adapter or converter cable is needed.

Signal Path

RJ45 Unknown

Molex 4-pin Power

RJ45

Family Network

Form Factor Rectangular with tab

Pin Count 8

Reversible No

Molex 4-pin

Family Power

Form Factor Rectangular nylon 4-pin

Pin Count 4

Reversible No

Notes

RJ45 to Molex 4-pin: Network and power connectors serve different purposes. PoE (Power over Ethernet) delivers power through RJ45, but this is built into the protocol, not a cable adaptation. The RJ45 (Network) and Molex 4-pin (Power) are from different connector families.