In the following circuit a 120 ohm termination resistor is placed across the Rx+ and Rx- data lines connected to a RS485/422 transceiver. The transceiver is protected up +/- 60V.
I want voltage protection on these lines up to 24V. This would mean a user could possibly connect 24V directly across the 120 ohm resistor resulting in 4.8 Watts power disapation. Safe design practice would be to add at least around 50% tolerance to my resistor meaning a need a resistor rated around 7W.
Based on my searching a 7W resistor means moving to a large through hole part. The board space I have is very limited and this is undesirable.
Is there any alternatives to this problem?