Product Overview
Murrelektronik MCS-B Series 24VDC DIN Rail PSU - 90-265VAC Input, 1.3A Output, UL Listed, Unused
Condition
Unused NOS. Acquired from a contract manufacturer clearing surplus stock. Original manufacturer's packaging - box is open but contents are complete and undisturbed. Unit shows no signs of use or installation. Label edges show light soiling visible in photos; the unit itself is clean and intact. Blue output adjustment knob, green terminal blocks, and DIN rail latch are all present and undamaged. Photos show the specific unit you will receive.
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Product Overview
Murrelektronik 85161 is a single-phase AC/DC switch mode power supply from the MCS-B series. It mounts on a standard TH35 DIN rail and delivers a regulated 24V DC output - adjustable from 22.5 to 28V DC via the onboard trimmer knob - from a wide-range AC or DC input. Input accepts 100-240V AC or 110-300V DC. Output is rated 24VDC at 1.3A (31W). Rated IP20. UL Listed. Made in Czech Republic. Part number 85161 replaces the earlier MURR 85432.
Key Features
- Output: 24V DC, adjustable 22.5-28V DC via onboard knob
- Output current: 1.3A (rated at 40°C); derated to 1.0A at 60°C when input voltage is below 170V AC
- Output power: 31W
- Input: 100-240V AC (50/60 Hz) or 110-300V DC - confirmed on unit label
- DIN rail mounting: TH35 (EN 60715), 38mm wide housing
- Dimensions: 76 x 38 x 87.5 mm
- Protection rating: IP20
- Certifications: UL Listed, CE - marks confirmed visible on unit label
- Operating temperature: -25 to 60°C
- Country of origin: Czech Republic - confirmed on label
- Replaces MURR 85432
Applications
- Maintenance technician pulls a failed PSU from a control cabinet, snaps the 85161 onto the DIN rail, and wires it in to restore 24VDC to a PLC or sensor bank before the next shift starts
- Panel builder integrates the 85161 into a new control enclosure during fabrication, powering HMI panels, relays, and automation sensors from a single compact rail-mount supply
- Engineering team qualifying a replacement for an end-of-life 85432 - this is the direct successor, same footprint and output
- Hobbyist or bench builder using DIN rail components to power 24V automation hardware in a workshop control panel or custom automation project
Frequently Asked Questions
What input power does this supply require?
The unit label and research confirm: 100-240V AC (50/60 Hz) or 110-300V DC. It works on standard North American and European mains voltages without a tap change or external adapter.
What is the output voltage and can it be adjusted?
Output is 24V DC, adjustable from 22.5 to 28V DC using the blue trimmer knob on the face of the unit - confirmed visible in photos.
Does output current derate at higher temperatures?
Yes. The supply delivers 1.3A at 40°C. At 60°C with input voltage below 170V AC, output current derate to 1.0A. At 60°C with input above 170V AC, the 1.3A rating holds. Size your application accordingly if your cabinet runs warm.
What is included with this unit?
The unit itself, in its original manufacturer's box. No additional accessories or documentation confirmed included.
Does this replace the MURR 85432?
Yes. The 85161 is the direct replacement for the MURR 85432.
A NOS Murrelektronik supply sitting in a contract manufacturer's surplus stock - never installed, still in the box, waiting for the panel that needs it. Wire it in, dial the output, and the cabinet comes back to life.
