MEAN WELL USA Inc.
Mean Well HDR-150-24
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Mean Well HDR-150-24 — 150W 24V ultra-slim DIN-rail supply
A genuine Mean Well HDR-150-24: an ultra-slim, fanless DIN-rail power supply that puts out a regulated 24VDC rail from any mains input. This is the same 24V that a Voron, RatRig, or 24V Ender/Klipper build runs on — it feeds the bed heater and the control electronics (board, steppers, fans, hotend heater). The HDR is the DIN-rail form factor: instead of the usual open enclosed brick screwed to a frame rail, it clips onto standard TS-35 DIN rail for a clean control-cabinet or electronics-bay layout.
Honest power math — read this before you buy
The "150W" rating is at 230VAC. On US 115V mains this unit derates to 127.4W (24V @ 5.31A) — that is a hard spec on the Mean Well datasheet, not a fudge factor. 127W is enough to run the electronics and a small-to-medium 24V bed heater, but if you are sizing the supply primarily to drive a large 24V silicone bed heater on US mains, do the wattage math first: a 300x300 24V bed pad can pull close to or past this. For a big bed on 120V most builders step up to a 200-350W class supply (or run the bed off mains AC through an SSR). Use this where ~127W on 120V actually covers your load, or anywhere you have 230V available, where you get the full 150W.
Why the DIN-rail form factor
The HDR is "step shape" ultra-slim — a narrow 105 x 90 x 54.5 mm body that snaps onto TS-35/7.5 or TS-35/15 rail. It is the tidy option: rail-mount it next to your control board, breakers, and SSR instead of standing off an enclosed brick. Fanless convection cooling means it is silent and has no fan to clog or fail. Output is trimmable 21.6-29V if you need to nudge the rail. Versus the enclosed LRS bricks we also sell, the HDR is the premium, cabinet-grade install — you pay for the slim rail-mount body, not for more watts.
Wiring and safety — bare mains terminals
This is a bare-terminal industrial supply, not a plug-and-play adapter. Mains lands on screw terminals (L / N / earth-via-case is Class II, so chassis bonding rules differ from a 3-terminal Class I unit — read the datasheet). You are responsible for an inline mains fuse, a strain-relieved and properly gauged AC cord, an IEC inlet or hardwired entry, and keeping fingers off live terminals. There is no fuse, switch, or cord in the box. If you are not comfortable wiring line-voltage AC to screw terminals and fusing it correctly, have someone who is do it. A terminal cover / finger guard is strongly recommended on any exposed-terminal supply that lives in a printer enclosure.
Specs
- Output: 24VDC, 6.25A, 150W at 230VAC — 5.31A, 127.4W at 115VAC
- Input: 85-264VAC universal, 47-63Hz
- Efficiency: ~90% (90.5% typ)
- Output adjust: 21.6-29V trimpot
- Cooling: fanless / convection
- Protections: short-circuit, overload, overvoltage
- Mounting: TS-35/7.5 or TS-35/15 DIN rail
- Connections: screw terminals (AC in / DC out)
- Size: 105 x 90 x 54.5 mm (4.13 x 3.54 x 2.15 in)
- Temp: -30 to +70C (with derating), no-load draw <0.3W
- Listings: UL/IEC 62368-1, UL 61010; 3-year Mean Well warranty
Genuine Mean Well. On sale as part of a clearance — same part, same spec, lower price.
Shipping & Returns
Returns:
Thank you for purchasing from dfh.fm. I want you to be completely satisfied with your purchase. If for any reason you are not satisfied, you may return your purchase within 60 days of the original purchase date.
Defective items: Please inspect items upon receipt. If you receive a defective item, you may return it for a full refund or replacement within 90 days of the original purchase date. Please contact me to initiate a return for a defective item.
Non-defective items: If you are not satisfied with a non-defective item, you may return it for a refund within 30 days of the original purchase date. A 20% restocking fee will be deducted from the refund amount, to offset the time and inconvenience, as I am the sole employee processing the return and restocking the item. The fee also covers the costs associated with processing the return. Refunds for non-defective items will be issued through the original payment method.
Preordered items: Due to the nature of preorders, delivery dates are subject to change. Please keep in mind that, If you have preordered an item, it is not eligible for a refund until after it has arrived at the store. Once the item arrives at the store and is inspected, you may request a refund within 30 days of the original purchase date. Please note that refunds for preordered items may take up to 10 days to be issued.
To initiate a return, please open a ticket on the shop’s discord channel, with your order number and the reason for the return. We will provide you with further instructions on how to return your purchase.
Thank you for shopping with us. If you have any questions or concerns, please don't hesitate to contact me, via Discord.
Order alterations and cancellations:
Once an order has ben submitted, no alterations can be made. This includes adding or removing items or canceling orders. You are welcome to return an order, once you have taken receipt, following the returns procedure listed above.
Shipping:
US Shipping is via UPS or USPS. The way it is set up shows the least expensive options for standard, priority and express shipping. I can not take special requests for specific carriers at this time.
International shipping is mostly UPS, as I utilize Zonos/UPS integration to tally extremely accurate import and shipping costs.
I require a telephone and email with international orders and you must make yourself available to the carrier or your customs, should they require more information. If you are unreachable and the package is discarded or rerturned, I will not be responsible for rerturning your shipping cost.
If there is a problem with an international order, it is my choice to refund part or all of the order, or send a replacement.
Addresses are verified through Shopify, but the customer is still responsible for inputting their address in the correct format. Any returns or lost shipments, due to incorrectly addressed packages, are the responsibility of the customer.
