Designed for everyday commercial and industrial branch circuit protection, this 30-amp QP series device offers reliable thermal-magnetic tripping. The three-pole configuration ensures all phases disconnect simultaneously during an overload or short circuit event. It easily installs into standard Siemens panelboards and load centers, while also acting as an exact replacement for legacy Murray MP330 units.
Does this breaker replace older ITE 30A 3-pole breakers?
Yes, the Siemens Q330 is the direct replacement for obsolete ITE EQ-P 3-pole 30A breakers. It fits the same panel spaces and utilizes the identical plug-on connection.
Which load centers accept the Siemens Q330 breaker?
This Type QP breaker is compatible with modern Siemens PL, ES, and EQ series load centers, as well as legacy ITE panelboards that accept standard 1-inch plug-on breakers.
How much panel space is required to install this breaker?
Because it is a 3-pole breaker with a standard 1-inch width per pole, it requires three adjacent spaces (3 inches total) on the panel bus.
Is the Q330 rated for HVAC equipment?
Yes, this thermal-magnetic breaker is HACR rated, meaning it is certified for use with heating, air conditioning, and refrigeration equipment that requires overcurrent protection.
What if my electrical system requires a higher interrupting rating?
If your application requires a 22kAIC rating instead of the standard 10kAIC, you will need the Siemens Q330H (Type QPH). It is a direct physical match that provides higher fault current protection.
Can I use this plug-on breaker in a bolt-on panelboard?
No, the Q330 features a plug-in connection designed for standard load centers. For a bolt-on application in Siemens commercial panels, you will need a Type BQ equivalent.
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Review summary
Customers rate this product 5.0 out of 5 based on 1 review.