Q250 is a standard Siemens QP two-pole breaker. It is rated 50A at 120/240V AC, uses plug-in mounting, and provides common thermal-magnetic protection with a 10 kA interrupting capacity.
Q250 specifications
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Model: Q250
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Type: Siemens QP/MP
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Breaker function: Standard thermal-magnetic
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Rating: 50A, 2 pole, 120/240V AC
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Interrupt rating: 10 kA
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Connection: Plug-in
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Standard: UL 489
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Electronic protection: No AFCI or GFCI
Do not confuse Q250 with QF250A
The extra “F” changes the product: QF250A is a two-pole GFCI with a test mechanism and neutral pigtail, while Q250 is a standard breaker. If the circuit specification requires ground-fault protection, Q250 alone does not provide it.
Match the loadcenter and circuit rating
Verify the panel label accepts Type QP/MP and the circuit is designed for 50A, two poles, 120/240V, and 10 kA. Confirm conductor ampacity and connected-equipment requirements before replacing or upsizing any breaker. A qualified person should make the selection and installation.