MEAN WELL MDR Switched Mode DIN Rail Power Supply, 85 → 264V ac ac Input, 24V dc dc Output, 1A Output, 20W

RS Stock No.:: 428-433
Distrelec Article No.:: 169-76-138
Mfr. Part No.:: MDR-20-24
Brand:: MEAN WELL

Subtotal (1 unit)*

£41.96

(exc. VAT)

£50.35

(inc. VAT)

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In Stock

1,029 unit(s) ready to ship
Plus 407 unit(s) ready to ship from another location
Plus 720 unit(s) shipping from 15 October 2025

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Units	Per unit
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Alternative

This product is not currently available. Here is our alternative recommendation.

RS PRO Switched Mode DIN Rail Power Supply, 230V ac, 24V dc dc Output, 1.3A Output, 30W

RS Stock No.: 136-8308

Each

£20.83

(exc. VAT)

£25.00

(inc. VAT)

RS Stock No.:: 428-433
Distrelec Article No.:: 169-76-138
Mfr. Part No.:: MDR-20-24
Brand:: MEAN WELL

Specifications

Technical Reference

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	MEAN WELL
	Series	MDR
	Type	Switched Mode
	Electrical Phase	1
	Number of Outputs	1
	AC or DC Input Voltage	ac
	Input Voltage	85 → 264V ac
	AC or DC Output Voltage	dc
	Output Voltage	24V dc
	Output Current	1A
	Dimensions	100 x 22.5 x 90mm
	Width	22.5mm
	Height	100mm
	Depth	90mm
	Special Features	Overvoltage and Short Circuit Protection
	MTBF	236900h
	Maximum Temperature	+70°C
	Mounting Type	DIN Rail Mount
	Ripple And Noise	150mV Pk-Pk
	Output Voltage Adjustment Range	21.6 → 26.4V
	Standards Met	RoHS Compliant, TUV EN 60950-1, UL 508
	Minimum Temperature	-20°C
	Load Regulation	±1%

	Select all
	Brand MEAN WELL
	Series MDR
	Type Switched Mode
	Electrical Phase 1
	Number of Outputs 1
	AC or DC Input Voltage ac
	Input Voltage 85 → 264V ac
	AC or DC Output Voltage dc
	Output Voltage 24V dc
	Output Current 1A
	Dimensions 100 x 22.5 x 90mm
	Width 22.5mm
	Height 100mm
	Depth 90mm
	Special Features Overvoltage and Short Circuit Protection
	MTBF 236900h
	Maximum Temperature +70°C
	Mounting Type DIN Rail Mount
	Ripple And Noise 150mV Pk-Pk
	Output Voltage Adjustment Range 21.6 → 26.4V
	Standards Met RoHS Compliant, TUV EN 60950-1, UL 508
	Minimum Temperature -20°C
	Load Regulation ±1%

COO (Country of Origin):: CN

Mean Well MDR Series Single Output DIN Rail Power Supply

A range of ultra slim single output DIN Rail power supplies with short circuit, overload and over voltage protection. These PSUs can be installed on DIN Rail TS-35/7.5 or 15 and offer cooling by free air convection.

Features and Benefits

Universal AC input/Full range

Protections: Short circuit/Overload/Over voltage

Cooling by free air convection

Can be installed on DIN Rail TS-35/7.5 or 15

DC OK relay contact

LED indicator for power-on

No load power consumption <0.75 W

100% full load burn-in test

3 years warranty

Class 1, Div 2 hazardous locations T4

Why use a DIN Rail Power Supply?

The flexibility of DIN Rail mounting systems enables quicker installation time as all devices are able to simply snap onto the metal rails. Power supplies can be easily organised on DIN Rails within enclosed wall boxes or in areas where there is limited space. Similar devices can be mounted next to each other reducing the amount of cabling required. Most power supplies are convection cooled so no cooling fans are needed.
DIN Rail AC/DC power supplies are widely used in many automation, instrumentation and industrial applications. They are used to power a wide variety of DC operated devices including sensors, motors, actuators, solenoids and relays.

Points to Consider When Buying a DIN Rail Power Supply

DIN Rail size– There are three common types of DIN Rails. Top Hat, G section and C section. Most have a depth of 7.5 mm or 15 mm. It is wise to check that your power supply is compatible with your DIN Rail.

Protection Types – It is important to choose a power supply that is protected against either short circuit, overload, over temperature or over voltage. Some power supplies also offer a hiccup mode which will allow the PSU to resume operation once the fault is cleared.

Fixed or adjustable output voltage or current – In test systems it is often convenient to have adjustable DC voltage however in other applications a fixed DC supply may be essential.

Cabling and wiring – The input/output lines to and from the power supply should be as short as possible with a large cross sectional area to help minimise noise and heat.

Efficiency – Choose a power supply that has an efficiency over 89% to minimise the amount of power dissipation, especially if the system relies on convection cooling.

Input voltage range – If the DIN Rail power supply you are buying is to be used in Europe and North America as well as the UK then a universal AC input range of 80 V ac to 264 V ac is required.

Standards – If the power supply is to be used in the USA for controlling electric motors then it will need to comply with Standard UL508, the safety standard for industrial control equipment.

Standards

UL508, UL60950-1, TUV EN60950-1, Class I, Div. 2 Group A, B, C, D Hazardous Locations T4, EAC TP TC 004, BSMI CNS14336-1 approved