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Selection guides

Six lines narrow the range

A rack PDU is fixed by six values, not by a model name: current per feed, outlet mix, metering depth, switching need, mounting orientation and inlet. Write those six down and the range is usually two or three lines.

Request a quote Open the checklist
A specification sheet and outline drawings laid out beside a rack PDU on a dark workbench, the unit lit from the left with the right of the frame left clear
Judgement line first, product name last. design-guides-b1
Input to output
10A ~ 32A
10A to 16A on single-phase bench lines
Working voltage
110V ~ 250V AC
Wide-input build 180 ~ 265V with surge protection
Frequency
50Hz ~ 60Hz
No re-rating between the two
Outlet example
C39x4 + C13x36
40 outlets on one vertical chassis

Judgement line to value

What each line actually decides

The left column is what a buyer can measure on site. The right column is the value that settles the line, and the note under it is where the cost sits.

Selection matrix
Judgement lineValue that settles itEffect on the build
Current per feed16A / 32ABreaker rating and conductor cross-section
Outlet mixC13 / C19Rank length and panel cut-out
Metering depthtotal / per outletMeter board count and firmware image
Energy grade1 grade, Scale 0.1 kWhBilling-grade energy register
Switchingper outlet / noneRelay count and firmware image
Mountingzero-U / 1UChassis length and bracket set
Inlethardwired / plugCable gland, plug type, bend radius
Data pathSNMP / Modbus / RS485Network module variant
Two lines settle together: per-outlet metering plus per-outlet switching is the build that costs the most and answers the most questions. Choose it only when both answers are needed.
  • Current
  • Outlets
  • Metering
  • Switching
  • Zero-U
  • 1U
  • SNMP
  • Drawings
A rack PDU on a workbench next to a printed specification sheet, the outlet rank and the sheet edge raking light across the brushed steel
Bench check before the drawing is frozen. design-guides-b3

Worked example

From six lines to one part number

A 42U cabinet holding mixed compute and storage. The installer reads 16A per feed, a mix of C13 and C19 leads, locked doors with nobody on site, and a poller that already speaks SNMP. Six lines, one configuration, and the whole answer fits in the rows below.

Feed current
16A single-phase
Outlet rank
C39x4 + C13x36
Metering depth
per outlet
Energy grade
1 grade, Scale 0.1 kWh
Switching
per-outlet relay
Mounting
zero-U vertical
  • Rack
  • Busbar
  • Register
  • Poller
Standard parts are not the only route: lines are built to a customer drawing or a physical sample, including outlet mixes that are not in any catalogue.

How a selection becomes a drawing

Four confirmations before the conductor is cut

  1. Brief

    Outlet combination, current per feed, metering depth and switching need. Buyers send a photograph, a drawing or a sample.

    Evidence: brief with the six lines filled

  2. Layout check

    Rank length, panel cut-out, bend radius and bracket set are checked against the cabinet that will hold the unit.

    Evidence: outline drawing, mounting orientation

  3. Parameter confirmation

    Breaker rating, conductor cross-section and meter register are written into the specification sheet, one row per line.

    Evidence: per-line specification sheet

  4. Freeze

    The drawing is frozen and the firmware image is matched to the metering depth. Later changes restart at the layout check.

    Evidence: released revision marker

Six judgement lines, one card each

  • Current
    • Range 10A ~ 32A
  • Outlets
    • Types C13 / C19
  • Metering
    • Depth total / outlet
  • Switching
    • Relay per outlet
  • Mounting
    • Form zero-U / 1U
  • Data path
    • Bus SNMP / Modbus

Send the six lines

Get the judgement line back

Outlet combination, current per feed, metering depth and remote switching. Where the brief is ambiguous, the reply names the line that needs a decision rather than guessing at it.

Request a quote Full specifications
Inquiries are answered within 12 business hours. Datasheets, outline drawings and the meter register map are available on request.