Siemens Panelboards — Emergency Build & Same-Day Stock

When a Siemens panelboard fails on a live site, or a project hits a deadline that the manufacturer's 20-week lead time will not meet, our team builds and ships a replacement in 24 to 48 hours. Our inventory carries Siemens panelboards across the full P-Series range, configured for industrial, commercial, and mission-critical environments where waiting for a stock catalog order is not an option.

We work with electrical contractors, facility managers, plant maintenance leads, and data center operators across the United States. Every Siemens panelboard we supply is built to spec, tested, and crated for nationwide same-week delivery from our warehouses in Colorado, Texas, and California.

Siemens Panelboard Range We Stock and Build

Our Siemens panelboard inventory spans the complete distribution panel family, from compact lighting panels to high-amp power distribution units. We source bus, breakers, and trim direct, then assemble to your single-line diagram with the amperage, voltage, and configuration your project requires.

By Amperage Rating

• 600A Siemens panelboards – mid-range distribution for commercial buildings, light industrial, and tenant fit-outs. Available in main breaker or main lugs only (MLO) configurations.
• 800A Siemens panelboards – common for school campuses, retail centers, and mid-size manufacturing floors. Compatible with both bolt-on and plug-in branch breakers.
• 1000A Siemens panelboards – built for heavy commercial and industrial loads with branch ratings up to 1000A MCCB or 30 to 1000A fusible disconnect devices.
• 1200A Siemens panelboards – the high end of the panelboard range, sized for large facilities, hospitals, and process plants before stepping up to switchboard territory.

If your spec calls for an amperage outside this range, our team can quote 400A, 1600A, or custom builds on request. Most amp ratings ship from stock.

By Siemens P-Series

Siemens organizes its panelboard line into the P1 through P5 series, each addressing a different segment of the distribution load:

• P1 panelboards – compact lighting panels up to 400A bus. The P1's split neutral and open-ended bus design simplifies field changes when feed direction or main lug versus main breaker configurations need to flip late in a project.
• P2 panelboards – flexible factory-assembled lighting panel options. Mix breaker frames within the unit space up to 225 amps, ideal for tenant build-outs and retrofit work.
• P3 panelboards – mid-tier distribution rated 250A to 800A with integrated time clocks, bus-mounted contactors as mains or sub-mains, split bus, and sub-feed lugs available up to 400 amps.
• P4 panelboards – mid-sized distribution panel accepting both fusible and circuit breaker branch and main devices, rated to 1200A.
• P5 panelboards – the top of the P-Series range for the largest panelboard applications, 400A to 1200A, before the load specification calls for a switchboard.

Configuration Options

Every Siemens panelboard we build is configured to the engineer's drawings. The options we routinely ship include:

• Main device – main breaker (MCB), main lugs only (MLO), main switch, or subfeed and feed-thru variants for downstream distribution.
• Voltage rating – 240V single-phase, 208Y/120V three-phase, 480Y/277Vac three-phase, and 480V delta. The 480Y/277V configuration is the most common request for commercial and industrial work.
• Branch breaker type – bolt-on or plug-in, MCCB up to 1200A, or fusible disconnect up to 1200A.
• Short circuit rating – up to 200 KAIC available on P-Series builds, depending on amperage and voltage.
• Bus material – copper or aluminum bus, sized to the panelboard's main rating.
• Enclosure – NEMA 1 indoor, NEMA 3R rainproof for outdoor installations, NEMA 12 for industrial environments with dust exposure.

If your project specification is not on this list, send it across. Our build team handles non-standard configurations as a routine part of the workflow.

Why Order Siemens Panelboards Through Us

Buyers come to our inventory for ane reason: the lead time gap. Ordering a custom Siemens panelboard direct from the manufacturer often runs 20 weeks or longer right now. Our team turns the same build around in 24 to 48 hours when manufacturer lead times are 20+ weeks, then ships it via expedited freight to your site anywhere in the continental US.

The advantage is structural, not promotional:

• In-stock components – we hold Siemens bus, breakers, and enclosures across the P1 through P5 range, ready to assemble.
• In-house build capacity – our shops cut, drill, bus, and wire panelboards on-site, so a job that hits our queue at 9am can be on a truck the next morning.
• Nationwide freight – warehouses in Colorado, Texas, and California reduce transit time to almost any US destination.
• Spec-accurate assemblies – every panelboard ships with documentation matching the configuration ordered, tested before crating.
• Direct line to the build team – when a contractor needs to verify a phase orientation or main rating mid-build, the conversation happens in minutes, not days.

This is the same workflow that gets used when a hospital's distribution panel fails on a Friday night, when a data center expansion is held up by a backordered Siemens panelboard, or when a generator transfer project has a Monday inspection and the panel has not shipped. Emergency procurement is the core of what we do.

Request a Quote on Your Siemens Panelboard

Send us your single-line, your spec sheet, or just the part number and amperage. Our team will quote, confirm availability, and provide a hard ship date within hours, not weeks. Whether you need one 800A P3 panelboard for a retrofit or a full set of P-Series panels for a new build, the build capacity is here and the components are on the shelf.

Use the quote request form on this page, or contact our build team directly to start a Siemens panelboard order. If the job is urgent, flag it as an emergency build and we will move it to the front of the queue.