will it work with 120 volts?

Yes and No. This is a double pole breaker and intended to be for 220/240 volt usage which means it is for something big, like a range, a dryer, or in my case, a tankless water heater. This would instantly kill (blow up) anything 110/120V that you tried to plug into if both poles were hooked up. For 110/120 volts you really want a single pole breaker. You also want to pay attention to the amps. Most items that run off of 110/120 volts wouldn't need more than 10 amps. Microwaves and Power tools would be the common exceptions. Most people will run more than 10 amp breakers so you can run more than one thing at a time. 15 or 20 amps are the most common for homes (20 for Microwaves and outlets used for Power Tools). The only possibility I could imagine why a panel in a house would have a single pole 70 amp breaker in it would be that it was acting as a sort of main breaker for all the smaller breakers (meaning not the double pole breakers). If you ran too many items in your house at once, you could trip the 70 amp breaker while never tripping any of the smaller ones. This would be the nuisance of this arrangement (The advantage would be having a way to turn off everything all at once without having to turn off the big stuff). But for that I'd just stay with the single pole. As for the Yes argument, You could just hook up one side and that would allow you to run 110/120 Volts, but it takes up an extra slot in your panel and for many of us all those slots are precious. You could use the other side for something else (I'm not sure what), but you need to remove the bar connecting the two switches so they can operate independently. At this point you would just have two single pole 70 amp breakers that happen to be attached to each other. Not knowing your application, I would really recommend a single pole for 110/120 Volts.

Can this breaker be used as a main breaker with a hold down kit ?

Yes as long as you use the hold down kit

what brand circuit breakers will fit in a murray box?

The Siemens QP, QT, QAF, and QPF are the standard "interchangeable" plug-on type breakers used in load centers under several brand names including Siemens, Murray, Gould, and Sylvania to name the most common

will this fit crouse hinds breaker?

All I know is that,"...Crouse-Hinds bought Murray, and then Siemens bought Crouse-Hinds."

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Reseñas

D**M

Good quality

Solid and reliable! This Siemens breaker was an exact fit in my panel and installed without any issues. Provides consistent performance and gives peace of mind knowing it’s a genuine Siemens part. The double pole design works perfectly for high-demand appliances, and the build quality feels very durable. Great product at a fair price—highly recommend!

30.08.2025

M**L

Reliable, Safe, and Easy to Install

The SIEMENS Q230 30‑Amp double pole breaker is top‑notch quality. It fits perfectly into my panel and locks in securely with no play. Installation was straightforward, and the breaker engages smoothly with a solid, confident click. Rated for 30 amps, it provides dependable protection for heavy‑duty circuits. The build feels rugged, and Siemens’ reputation for safety and reliability really shows here. I’ve had zero issues with tripping under normal load, and it gives peace of mind knowing my equipment is properly protected. Overall, this breaker delivers durability, safety, and ease of use—exactly what you want in electrical hardware.

18.11.2025

H**Y

Great product.

Not much to say here it filled my application. Just a basic braker. Works a designed and expect many years for this as I always have good luck with siemans products! Will update if there are issues. effortless to onstall

29.11.2025

C**H

Does the job!

Fit perfectly and worked flawlessly. Electric dryer is operational.

12.01.2026

B**S

Cost.

Good price.

18.08.2025

D**O

good product

works great

26.12.2025

L**S

High Quality

Excellent quality breaker

16.12.2025

K**G

Reliable and Easy to Install Breaker

I purchased this Siemens 30-amp double pole breaker for my panel, and it worked exactly as expected. The build quality feels solid, and it snapped into place securely with no issues. Installation was quick and straightforward—it seated firmly, and the connection was tight, giving me confidence in the fit. Once installed, it performed flawlessly. It handles the load without any problems, and I’ve had no tripping or overheating. Siemens breakers are known for being reliable, and this one is no different. It also fit perfectly in my Siemens panel, which isn’t always the case with off-brand breakers. Overall, this is a dependable breaker that does exactly what it’s supposed to do. If you’re working with a Siemens panel and need a 30-amp double pole, this is the right choice.

1.09.2025

Brand	SIEMENS
Circuit Breaker Type	Standard
Current Rating	50 Amps
Mounting Type	Plug-In Mount
Number Of Poles	2
Product Dimensions	10"D x 5"W x 8"H

Q250 50-Amp Double Pole Type QP Circuit Breaker

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