✅ Circuit: SPDT matches the requirement.
✅ Switch Function: On-On matches the requirement.
✅ Current Rating: 300mA DC satisfies the required minimum of 200mA.
✅ Voltage Rating - DC: 30V DC exceeds the required minimum of 12V.
✅ Mounting Type: Through Hole matches the PCB mounting requirement.
✅ Termination Style: PC Pin matches the requirement.
All required specifications are satisfied. This slide switch is suitable for 12V, 150mA power ON/OFF control in the described battery-powered embedded device and is approved.