Mean Well MDR-40-5 MEAN WELL DIN-Rail Power Supplies

Razz Middle East supplies MEAN WELL DIN-rail power supplies in Saudi Arabia, sourced to order against the full model code. These clip onto a standard 35 mm rail beside the breakers and terminals, so no chassis mounting plate is needed. The range runs from the compact HDR series for small control jobs to the SDR and SDR-P series for panel-wide 24 V and 48 V rails. Items are delivered duty-paid, normally within three weeks.

Mean Well MDR-40-5

This page covers Mean Well part number MDR-40-5 — MEAN WELL DIN-Rail Power Supplies. Quote the full part number with your enquiry and the item is unambiguous: one part number identifies one exact product variant, including options that are not visible in the description.

About MEAN WELL DIN-Rail Power Supplies

The code gives series, wattage class and nominal output: HDR-15-15 is the HDR series at the 15 W class with a 15 V output, HDR-100-12 the same series at 100 W and 12 V, and SDR-120-48, SDR-480P-48 and SDR-960-48 step up the SDR range. HDR is the narrow ultra-slim family aimed at small controllers, sensors and building devices where rail width is the constraint. SDR is the higher-power family, and the P suffix marks the version built with a peak-load reserve that lets the unit hold a short overload from an inductive or motor-driven load without shutting down, which is the usual reason a supply is chosen over a same-wattage plain model. Larger DIN-rail units generally offer a DC-OK relay or signal contact and, on some models, parallel operation for redundancy. Alongside the supplies, the DIN-rail range includes DC-UPS and battery controllers, redundancy modules that combine two supplies into one fault-tolerant feed, and buffer modules that ride through brief dips. All of them carry published derating curves and a minimum spacing requirement between units on the rail.

MEAN WELL DIN-Rail Power Supplies in Saudi Arabia

DIN-rail supplies dominate the smaller and retrofit panels built in the Kingdom, where there is rail space but no free back plate. Building management, HVAC and district cooling panels use them for controller and valve actuator power. Water utilities, irrigation and pumping stations use them in RTU and telemetry cabinets, often alongside a DC-UPS so the outstation keeps reporting through a supply interruption. Access control, fire alarm interfacing and CCTV cabinets in commercial buildings, hospitals and airports use 12 V and 24 V rail units. Machine and process panels in food, packaging and plastics plants use the SDR-P class where solenoid valves and contactor coils produce short current peaks. Panel temperature is again the practical limit, and rail-mounted units are more sensitive to it than chassis units because they sit shoulder to shoulder inside a closed cabinet, so spacing and cabinet ventilation matter. Input is normally 220-240 V single phase at 60 Hz, and imported equipment must satisfy the applicable SASO conformity requirements.

Ordering and lead time

Quote the series, wattage class and output voltage together, and include the P if the unit you are replacing has one, because the peak-capable version and the plain version share a wattage but not a behaviour. Give the continuous load and the switch-on surge of what the rail feeds. State how much free rail width you have, since HDR and SDR bodies differ substantially, and say whether the cabinet is ventilated and what ambient it reaches. If the supply has to survive a brief mains interruption or feed a redundant pair, say so, because that requires either a DC-UPS, a buffer module or a redundancy module in addition to the supply. A photograph of the existing unit on the rail is enough for a like-for-like replacement. Units are sourced to order and delivered duty-paid, with a normal lead time of three weeks.

Specifications are taken from the supplier's published catalogue data. Confirm against the manufacturer's current datasheet before ordering.