The HRP-450-36 is a 36V, 450W enclosed power supply from Mean Well's High Reliability (HRP) series. With 12.5A on tap, there's good headroom for running stepper or closed loop drivers on a CNC router or plasma table.
It has a few features you won't find on a basic enclosed supply. The cooling fan only runs when it's needed: it stays off at light load and kicks in once the load gets to around 20% or the inside of the case reaches about 50°C. While the machine is sitting idle you get a quieter workshop and less dust being pulled through the case.
There's also a DC OK output (a TTL signal that sits high while the supply is running) that you can wire into a spare controller input, plus remote sense connections that make up for up to 0.5V of voltage drop on longer output cables.
On the input side it accepts anything from 85 to 264VAC, has active power factor correction and is rated to ride out a 300VAC surge for 5 seconds. Short circuit, overload, over-voltage and over-temperature protection are all built in. If it's overloaded it limits the current rather than dropping out, then recovers by itself once the fault is cleared.
Output voltage can be trimmed from 28.8V to 39.6V with the adjustment pot beside the terminals. The case is 218 x 105 x 41mm with M4 mounting holes in the base and on both sides, so it's easy to fit into an electronics cabinet. There's a full dimension drawing in the photos.
Specifications
Model: HRP-450-36
Brand: Mean Well
Output: 36V DC, 12.5A, 450W
Voltage adjustment: 28.8-39.6V
Ripple and noise: 240mVp-p max
Voltage tolerance: ±1.0%
Input: 85-264VAC, 47-63Hz (or 120-370VDC)
Power factor: above 0.95 at 230VAC
Efficiency: 89% typical
Input current: 2.4A at 230VAC (typical)
Overload protection: 105-135% of rated power, constant current limiting, auto recovery
Over-voltage protection: 41.4-48.6V, shuts down output (cycle the power to reset)
Over-temperature protection: shuts down output, auto recovery once cooled
Signals: DC OK and remote sense (HRS DF11-4DP-2DS connector)
Cooling: built-in fan with automatic on/off control
Operating temperature: -40 to +70°C (full 450W up to 50°C, derating to 50% load at 70°C)
Vibration rating: 5G, 10-500Hz
Safety approvals: UL62368-1, TUV EN62368-1, AS/NZS 62368.1 (RCM marked), EAC
Dimensions: 218 x 105 x 41mm (L x W x H)
Mounting: 4 x M4 on the base, 8 x M4 on the sides (4 each side)
Weight: 1.1kg
Full technical details: Mean Well HRP-450 series datasheet (PDF)
The AC input connects to mains power, so please have it wired by a licensed electrician. Check that the output voltage and current suit your drivers and motors before ordering.