What is the difference between P and S prefixes of shunt trips and undervoltage trips for H, J, and L frame circuit breakers?

Product Line:
H, J and L Frame Molded Case Circuit Breakers

Resolution:
The difference between these products is their termination method.
The accessory with the prefix 'S' is the classic version that has a screw connection for installation. The other accessory with the prefix 'P', which is the latest model, has a spring clamp connection that makes the installation easier.
For installation procedure, please check this document.

Released for: Schneider Electric Canada