Built for commercial and industrial distribution, the Siemens Q335 provides 35 amps of thermal-magnetic protection in a three-pole configuration. This QP series breaker features an Insta-Wire design for faster installation. It mounts into Siemens load centers and panelboards via a standard plug-on connection. The unit also serves as a replacement for legacy MP335 breakers. Rated at 10 kAIC at 240VAC, it ensures dependable defense against overloads. It is HACR rated for HVAC equipment.
The Q335 is designed for use in 3-phase Siemens PL, ES, EQ, and Ultimate series load centers, as well as Siemens panelboards that accept Type QP plug-on breakers.
Can the Q335 replace older Murray circuit breakers?
Yes. Siemens has retired the Murray brand, and the Q335 is the direct, UL listed replacement for the legacy Murray MP335 (Type MP-T) 3-pole 35A breaker.
Is the Siemens Q335 suitable for HVAC equipment?
Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires a 35A overcurrent protection device.
What are the lug torque specifications for the Q335?
For the Q335 lug terminals, Siemens specifies a tightening torque of 40 lb-in for 8 AWG wire and 45 lb-in for 6 AWG to 4 AWG wire. Always verify with the label on the physical breaker before installation.
Do I need a retainer clip if using the Q335 as a main breaker?
Yes. If you are back-feeding the Q335 to use it as a main breaker in a load center, the National Electrical Code requires a hold-down kit. You will need the Siemens ECMBR3 retainer clip designed for 3-pole Type QP breakers.
Can I install this 3-pole breaker in a single-phase panel?
No. The Q335 is a 3-pole breaker that requires three separate bus stabs. It is strictly for use in 3-phase load centers and panelboards.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.