MEAN WELL MDR-100-24 AC to DC DIN-Rail Power Supply, 24V, 4 Amp, 96W, 1.5" - 1943490
Quick take
The MEAN WELL MDR-100-24 converts AC (85-264Vac) to a regulated 24V DC output for DIN-rail installations. With a 4A rating (96W) and built-in protections for overload and overheating, it is a practical choice for industrial control and automation builds that need a dependable 24V rail.
The main buying caveat is that limited buyer feedback includes a report of high-pitched noise, so it may not be the best fit for sound-sensitive setups.
Pros and cons
Pros
- 24V DC output at up to 4A (96W), suitable for a wide range of control loads.
- Universal AC input range (85-264Vac, 47-63Hz) helps with flexibility across installations.
- Protection features include short-circuit, overload, overvoltage, and over-temperature.
- Designed for DIN-rail mounting in a compact form factor (3.9" x 0.9" x 3.5").
Cons
- Buyer feedback is limited, and at least one review reported high-pitched noise.
- No output adjustment details are provided here beyond the general use case, so confirm voltage behavior for your specific controller and wiring plan.
What buyers think
Buyer-review evidence for the MEAN WELL MDR-100-24 is limited, but the available feedback points to a few recurring themes: overall performance and convenience in DIN-rail style automation projects, and a compact, lightweight build that is easy to integrate into temporary or portable setups. One reported concern is high-pitched noise, which may matter if the power supply will be inside a quiet workspace rather than an enclosed panel.
Because the review sample is small, patterns around long-term reliability and operating noise in every environment are not fully established.
Who this power supply is for
This is a good match if you need a 24V DC rail for automation, control boards, relays, small actuators, and other panel loads, where DIN-rail mounting and integrated protection are priorities.
It also tends to fit builders who want an AC-to-DC solution with a broad input spec (85-264Vac), rather than one that is limited to a narrow mains range.
Key specs that matter during shopping
Output and power budget
The MDR-100-24 provides 24V DC at up to 4A (96W). Use this when planning your load so your total consumption stays within the power rating, including any startup or peak current needs from connected devices.
Input compatibility
It supports a universal AC input range of 85-264Vac at 47-63Hz (or 120-370Vdc). That wide input range can reduce headaches when deploying equipment across different sites or wiring conditions.
Protection features
Integrated protections include short-circuit, overload, overvoltage, and over-temperature. These features are especially relevant in real-world control systems where wiring errors and load transients can happen.
Physical integration
DIN-rail mounting is the intended workflow, with compact dimensions listed as 3.9" x 0.9" x 3.5". That makes it easier to plan panel space for a tidy layout.
Pros and cons, in plain terms
Why buyers choose it
- Built for DIN-rail work: Compact footprint and an automation-oriented power conversion design.
- Robust protection set: Short-circuit, overload, overvoltage, and thermal protection help protect both the supply and downstream equipment.
- Flexible input: Universal AC input range is useful for varied installation environments.
Where it may not be the best fit
- Limited review depth: With a small number of reviews, buyer feedback is not deep enough to treat noise and long-term behavior as fully predictable across all use cases.
Verdict
The MEAN WELL MDR-100-24 is a solid 24V DC DIN-rail power option for automation and control projects that need up to 4A (96W), a universal AC input range, and multiple protection features. If you will mount it inside an enclosure and your load fits the 24V, 4A budget, it can be a straightforward choice. If noise is a critical concern in your workspace, consider this caveat and plan the placement accordingly.
FAQ
What voltage does the MEAN WELL MDR-100-24 provide?
It outputs 24V DC.
How much current can it supply at 24V?
It is rated for up to 4A at 24V (96W).
Is the AC input range compatible with typical mains power?
Yes. The input is listed as universal, 85-264Vac at 47-63Hz (also supports 120-370Vdc).
Does it have built-in protection?
Yes. It includes protections for short-circuit, overload, overvoltage, and over temperature.
Is it suitable for DIN-rail enclosures?
Yes. It is designed as a DIN-rail switching power supply and is intended for panel-style mounting.
Does it run quietly?
Most buyers did not highlight noise issues in the limited feedback available, but at least one review reported high-pitched noise. If placement matters for your environment, consider mounting it inside a closed enclosure.
Specifications
| Product Title | MEAN WELL MDR-100-24 AC to DC DIN-Rail Power Supply, 24V, 4 Amp, 96W, 1.5" - 1943490 |
|---|---|
| Category | Electronics > Power Accessories > PDUs |
| Brand | MEAN WELL |
| Manufacturer | MEAN WELL |
| Model Number | 1943490 |
| Item Weight | 0.42 Kilograms |
| Compatible Devices | Personal Computer |
| Connector Type Used on Cable | ATX |
| Output Wattage | 96 Watts |
| Form Factor | SFX |
| Wattage | 96 watts |
| Cooling Method | Air |
| Current Rating | 4 Amps |
| Maximum Input Voltage | 230 Volts |
| Minimum Input Voltage | 115 Volts |
| System Bus Connector Type | 24 Pin |
| Item Dimensions | 2.17 x 3.94 x 3.54 inches |
| Global Trade Identification Number | 00840406201768 |
| Mfr Part Number | 1943490 |
| Unit Count | 1.0 Count |
| Connector Type | ATX |
| Item dimensions L x W x H | 2.17 x 3.94 x 3.54 inches |
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