PRS-CB-MCCB
Molded-case circuit breaker
Three-pole and multi-pole breakers for switchboards and distribution panels.
Quote by frame, amp trip, poles, voltage, and kAIC. Name the panel family if you know it.
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Circuit breakers for data center panels
A breaker is quoted to the panel it lands in, not to a generic amp number. Frame, poles, trip, voltage, and interrupting rating have to match the gear on US data center jobs. This is a different purchase from the multi-year transformer lead times that pace a campus.
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How circuit breakers are used in data center power distribution
Breakers protect the feeders and branch circuits inside the electrical distribution of a hall. Molded-case breakers sit in switchboards and distribution panels for the larger loads. Bolt-on or plug-on branch breakers fill the lighting, receptacle, and small-power panels. DIN-rail breakers live in control panels and auxiliary cabinets, sometimes with a lock-off or an auxiliary contact.
The device has to match the panel it plugs or bolts into. A frame that does not fit the gear is scrap, which is why this catalog does not print amp prices. Poles, trip, voltage, and interrupting rating come from the one-line and the nameplate. A photo of that nameplate is the fastest way to get a real quote.
Breakers are not the large power transformer. Transformer lead times of years are a different procurement problem, described in transformer and equipment lead times. A breaker can still be a long-lead frame if it is an odd trip or a high interrupting rating. The enclosure it sits in, when you are buying the box too, is under enclosures. The conductors it protects are wire.
Panel family matters more than a catalog amp
Bolt-on and plug-on branch breakers are not interchangeable. A molded-case frame that does not match the switchboard will not land in the gear. A photo of the panel nameplate is the fastest way to get a real number. We do not publish amp prices, because the wrong frame is not a discount.
Branch, molded case, and DIN rail
Branch breakers feed lighting, receptacles, and small power. Molded-case breakers feed the larger distribution. DIN-rail breakers live in control panels and auxiliary gear, sometimes with a lock-off or an auxiliary contact. Say which of the three you need, and link enclosures if the panel box is part of the same buy.
Representative quote lines
PRS-CB-BR
Bolt-on branch breaker
Branch devices for the lighting, receptacle, and small-power panels on a hall.
Quote by poles, amp, and panel type. Plug-on versus bolt-on matters.
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PRS-CB-DIN
DIN-rail miniature breaker
Control-panel and auxiliary breakers on DIN rail, including supplemental uses.
Quote by curve, poles, amp, and whether you need a lock-off or aux contact.
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Codes keep a quote attached to the right line in this catalog. They are not a manufacturer part number. If you have a spec, put it in the notes. We price that request, not a shopping cart.
Frequently asked questions
Why can't I just order a breaker by amp rating?
Amp trip is one field. Frame, poles, voltage, interrupting rating, and whether the panel is bolt-on or plug-on decide if the breaker fits. Two 100-amp breakers from different panel families are not substitutes. Send the panel name if you know it.
What is the difference between a branch breaker and a molded-case breaker?
Branch breakers are the smaller devices in lighting and receptacle panels. Molded-case breakers are the larger frames in distribution equipment. DIN-rail miniatures are a third group, used in control cabinets. Quote the one the drawing shows.
Are breaker lead times the same as transformer lead times?
No. Large power transformers are the multi-year item covered in transformer lead times. Breakers vary by frame. A common branch device and a high-kAIC molded-case frame are not the same wait. We state timing on the quote. We do not pretend every breaker is on a shelf.
What does interrupting rating mean for the quote?
It is the fault current the breaker is rated to interrupt at a stated voltage. The available fault current at that panel is an engineering number. If the gear requires a higher kAIC than a standard frame, the price and the lead time both move. Put the required rating in the notes.
Can accessories be quoted with the breaker?
Yes. Lock-offs, handle ties, auxiliary contacts, and the lugs for that frame should be named if you need them. A bare breaker quote will not include accessories that were only on the drawing.
Do you stock specific panelboard brands?
This catalog is not a brand line card and not a claim of authorized distribution. If the panel is a named family, put that name in the notes so the quote can follow it. We will not guess a brand from an amp number.