QMQB panelboard switches are commonly used in commercial and industrial electrical distribution equipment. These switches are often found in older panelboards, distribution sections, and replacement applications where a direct-fit switch is required.
When replacing a QMQB panelboard switch, it is important to confirm the exact amp rating, voltage rating, pole count, fuse type, mounting style, and panelboard compatibility. These switches are not universal, and selecting the wrong unit can cause fitment issues or delay a shutdown.
Ampstate supplies QMQB panelboard switches, fusible switches, disconnect switches, breakers, panelboard parts, and industrial electrical replacement equipment.
Common Search Terms for QMQB Switches
Customers may search for these products using terms such as:
- QMQB panelboard switch
- FPE QMQB panelboard switch
- Federal Pioneer QMQB switch
- Federal Pacific QMQB switch
- QMQB fusible switch
- QMQB disconnect switch
- QMQB switch replacement
- 600V panelboard switch
- 200A QMQB switch
- 400A QMQB switch
- 600A QMQB switch
What Is a QMQB Panelboard Switch?
A QMQB panelboard switch is a panel-mounted switching device used for electrical distribution and circuit protection applications. Depending on the configuration, it may be used as a fusible switch, disconnect switch, or feeder switch inside compatible panelboard equipment.
Common applications include:
- Commercial electrical panels
- Industrial distribution panels
- Feeder circuits
- Equipment disconnects
- Replacement panelboard switches
- Maintenance shutdown repairs
What to Check Before Buying a QMQB Switch
Before ordering a replacement QMQB switch, confirm:
- Manufacturer
- Catalog number
- Amp rating
- Voltage rating
- Number of poles
- Fuse class
- Mounting style
- Panelboard series
- Line and load lug arrangement
- Physical dimensions
- Condition of the existing panel interior
The most important step is confirming that the replacement switch physically fits the existing panelboard.
Common Ratings
QMQB-style panelboard switches may be found in different amp ratings depending on the system. Common ratings include 30A, 60A, 100A, 200A, 400A, and 600A depending on the panelboard design.
Always confirm the exact rating from the existing switch label and panelboard nameplate before ordering.
Why Photos Help
For fast quoting, send clear photos of:
- Switch front label
- Panelboard nameplate
- Inside of the panel
- Existing switch mounting
- Fuse clips
- Line and load lugs
- Door label
- Any catalog numbers visible on the switch
Photos help confirm whether the replacement is a direct fit or if additional review is needed.
QMQB Panelboard Switch Replacement Support
Ampstate supplies QMQB panelboard switches, fusible switches, disconnect switches, breakers, panelboard parts, and industrial electrical replacement equipment.
We support contractors, facility managers, maintenance teams, and industrial buyers looking for hard-to-find panelboard switches across Canada and the USA.
To request a quote, send the part number, photos, amp rating, voltage rating, and quantity required.
