Mean Well EDR-120-24 DIN Rail Power Supply

Name: Mean Well EDR-120-24 DIN Rail Power Supply | Seven Star LLC
Brand: Mean Well
SKU: EDR-120-24

Economy 24 V DIN rail supply with a 40 mm footprint

The Mean Well EDR-120-24 is a 120 W single-output DIN rail power supply with a 24 V DC, 5 A output. The EDR-120 series is described by Mean Well as an economical slim series for TS-35/7.5 or TS-35/15 rails, with a metal housing that helps the unit shed heat and a body 40 mm wide.

Input is universal: 90 to 264 VAC, or 127 to 370 VDC through the AC terminals. The 24 V model reaches 87.5% typical efficiency and is cooled by free air convection. Protection covers short circuit, overload, overvoltage and overtemperature, and the constant-current overload characteristic suits inductive and capacitive loads. Mean Well gives a two-year warranty for this series and a full-load burn-in on every unit.

Technical specifications

Parameter	Specification
Manufacturer / series	Mean Well, EDR-120
Model	EDR-120-24
DC output	24 V DC / 5 A
Power rating	120 W
Trim range	24 to 28 V
Ripple (max.)	120 mVp-p
Setpoint tolerance	+/-1.0%
Regulation (line / load)	+/-0.5% / +/-1.0%
Mains input	90 to 264 VAC; 127 to 370 VDC
Typical efficiency	87.5%
Input current (typ.)	2.25 A at 115 VAC; 1.3 A at 230 VAC
Inrush (typ.)	20 A at 115 VAC; 35 A at 230 VAC
Hold-up (typ.)	16 ms at 230 VAC; 10 ms at 115 VAC
Overload behaviour	105 to 130%, constant current limiting, auto recovery
Overvoltage limit	29 to 33 V, shut down; re-power to recover
Ambient operating range	-20 to +60 C, with derating curve
Dielectric strength	Input-output 3 kVAC; input-FG 2 kVAC; output-FG 0.5 kVAC
Approvals named	UL 508, TUV EN 62368-1, EAC TP TC 004, BSMI
Size (W x H x D)	40 x 125.2 x 113.5 mm
Mass	0.6 kg

Choosing between the 120 W DIN rail series

Mean Well offers several 120 W DIN rail families with the same 40 mm width, and the differences matter at purchase. The EDR-120 has an operating range up to +60 C at full load, which is 10 C lower than the NDR-120 data, and a warranty of two years. It is a sensible choice for temperature-controlled cabinets where cost is the main driver. Where the panel runs hot, compare the derating curve in the datasheet or consider a family rated to +70 C.

Installation and operating checks

Fit the unit on the rail with the recommended clearances: 40 mm above, 20 mm below and 5 mm at each side when running at continuous full load. Check the input range against your supply: below 90 VAC the datasheet requires derating. The output potentiometer adjusts the voltage between 24 and 28 V, The datasheet for this series does not list a DC OK relay contact, so use an external monitoring relay if the control system needs a power-fail signal. Record the nameplate output and date code at commissioning so that a replacement can be matched quickly if the supply is ever swapped on a running line.

Documents and quotation

Mean Well publishes one specification PDF for the whole EDR-120 series; it is attached to this page and shows every voltage variant together with the drawings. Please quote EDR-120-24 with the quantity, available mains, expected load and its peak, ambient temperature and approvals needed. More supplies can be found in Power Modules.

Mean Well power supply families

The catalogue covers DIN rail power supplies from 15 W to several hundred watts in single-phase and three-phase versions, enclosed chassis supplies with fan or convection cooling, medical-standard supplies, DIN rail DC-DC converters and many other formats. Each series has a datasheet that lists all output voltages, derating curves and approvals. The standard catalogue format suits machine builders, panel builders and maintenance teams that need a documented, replaceable supply rather than a custom design.

Frequently Asked Questions