🔌 Power Supply Details for Your Dominator CNC: LRS-450-36 vs LRS-450-48
Your Dominator CNC machine is powered by a Mean Well LRS series power supply, known for reliability, efficiency, and global compatibility. This article explains which unit we use by default, when to consider upgrading, and what makes these power supplies ideal for international users.
📦 Standard Power Supply: LRS-450-36
All Dominator CNC machines ship with the LRS-450-36 as the standard power supply. This unit delivers 36V DC at up to 12.5A, providing stable power for your stepper motors, controller, and accessories.
Key Features:
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Output Voltage: 36V DC
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Output Power: 450W max
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Input Voltage: 85–264V AC (auto-switching for 110V or 220V regions)
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Cooling: Convection (fanless = quiet)
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Dimensions: 215 × 115 × 30 mm
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Protections: Short circuit, overload, overvoltage, overtemperature
This supply is more than sufficient for most Dominator configurations, including multi-axis motion with closed-loop steppers and standard spindles.
⚡ Optional Upgrade: LRS-450-48
If you're planning to push your machine harder, add more powerful steppers or servos, or run accessories that demand higher voltage (like certain 48V spindles or higher-torque motors), you may want to upgrade to the LRS-450-48 model.
What’s Different?
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Output Voltage: 48V DC (instead of 36V)
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Output Current: 9.4A (at 48V)
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Same form factor and wiring layout as the LRS-450-36
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Also supports 110V or 220V AC input, just like the 36V version
Higher voltage allows your stepper drivers to operate more efficiently, which can translate to:
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Improved high-speed performance
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Lower current draw
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Reduced risk of motor stall at rapid accelerations
Note: Be sure your stepper drivers, controller, and spindle are rated for 48V operation before upgrading.
🌍 International Compatibility
Both the LRS-450-36 and LRS-450-48 models support wide input voltage ranges:
AC Input: 85V to 264V (47–63Hz)
Supports standard wall power in North America (110V) and most international markets (220V) without manual switching.
No need for an external voltage converter — just make sure your outlet wiring and plug adapter are safe and grounded properly.
🧠 Summary Table
| Feature | LRS-450-36 | LRS-450-48 |
|---|---|---|
| Output Voltage | 36V DC | 48V DC |
| Max Power | 450W | 450W |
| Max Current | 12.5A | 9.4A |
| Input Voltage | 110–220V AC (auto-switching) | Same |
| Cooling | Fanless (silent) | Fanless (silent) |
| Recommended For | Standard Dominator builds | High-performance builds with 48V-rated hardware |
📎 Technical Documentation
For in-depth specs, electrical tolerances, and wiring diagrams, please refer to the official Mean Well documentation attached to this article
🛠️ Need Help Deciding?
If you’re not sure whether the 36V or 48V power supply is right for your setup, or you’re planning to add aftermarket upgrades, contact our support team.
We’ll help you choose the right configuration to maximize performance and avoid electrical issues.
