switching power supply factory inquiry rows

How to read a factory reply against one label

A switching power supply factory label on this page is a starting name. The supplier still has to name the maker, the model, and the datasheet revision. A 12 V brick and a 24 V brick can share a 10 A figure and still fail in different radios.

Ask whether the input is 100-240 VAC or a -48 VDC plant feed. Frequency range, when the input is AC, is usually a 50 Hz and 60 Hz question. Write the inlet: IEC 60320 C14 is a common enclosed-brick question, not a rating this desk assigns. A hardwired lug is a different line from a detachable cord.

Output capacity should show volts, amperes, and watts together. 12 V times 10 A is 120 W. 24 V times 10 A is 240 W. If the sheet lists a peak current above the continuous current, ask for the time limit in seconds. A peak number without a time is not a second watt rating.

Cooling changes the usable load. A fan-cooled brick and a convection brick can share a nameplate and diverge at 50 °C. Ask for the derating curve. Airflow direction matters in a sealed shelter. Ingress protection stays blank until that model states a code. Runtime stays blank unless a UPS is on the same purchase.

Rack unit height matters for a shelf, not for every brick. One rack unit is 44.45 mm. A 1U shelf of 44.45 mm will not accept a taller module because a photo looked compact. Open-frame boards need the host chassis. Do not paste an enclosed-brick safety file onto a bare board.

Monitoring, if present, should say local meter, dry contact, or a network controller. A digit window is not remote monitoring. Measurement accuracy of that meter needs the meter sheet. Calibration traceability is a document request, not a mark this page prints. Power over Ethernet remains a switch-port load. Switching capacity remains a fabric figure. Neither belongs in the watt cell.

New and refurbished condition, remaining warranty months, and connector mating cycle are separate cells. A refurbished module can be discussed when the buyer wants legacy fit, and a new module can be discussed when the buyer wants a clearer support path. This page does not pick a side. Quote rows lists the cells to align, and the RFQ form is where the brief is sent.

Hold-up, if you need it, is a millisecond question at rated load. Ripple is a millivolt peak-to-peak question at a stated bandwidth. Efficiency, if compared, needs the load point, such as half load, and should be written as a percent on the supplier sheet rather than assumed here. Installation environment should say indoor rack, outdoor cabinet, or a hot aisle. The note dated 2026-10-27 in the buyer archive uses the same split.