NICE / APOLLO MX5343 Power Supply Assembly for Juno Slide Gate Operator
The Nice Apollo MX5343 is the replacement power supply assembly used in Juno slide gate operator service. In the Juno platform, the gate is moved by a battery supported DC drive system while the controller, charging circuit, motor circuit, and accessories depend on stable low-voltage power inside the operator cabinet. This assembly is commonly replaced when the operator has confirmed power at the incoming side but will not maintain proper DC operating power, will not keep the battery charged correctly, or has a damaged power board assembly from age, moisture, surge, or cabinet contamination. It is not a complete controller and it is not the transformer by itself. The MX5343 should be matched to the Juno parts diagram and used with the correct Mercury 310 control layout, battery, transformer, and harnessing. Because Juno AC and solar-style installations can look similar inside the cabinet, confirm the original part number and wiring before ordering.
Compatible With
This item is commonly associated with the following Nice Apollo applications when the installed system, generation, and parts diagram match:
- Nice Apollo Juno 310 slide gate operator
- Juno AC slide gate operator assemblies
- Juno Solar / battery based slide gate systems where MX5343 is specified
- Mercury 310 controller installations inside Juno operator cabinets
- Juno systems using MX4859 transformer, 12V battery, and DC motor drive layout
Features and Specifications
| Manufacturer | Nice Apollo |
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| Product Type | Power supply assembly |
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| Part Number | MX5343 |
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| Application | Juno slide gate operator service |
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| Compatible Operator Type | Residential slide gate operator |
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| Controller Platform | Mercury 310 |
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| Related Components | MX4859 transformer, MX4920 Mercury 310 controller, 12V battery, Juno motor assembly |
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| Notes | Power supply assembly only; not a complete controller or transformer |
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Also Known As / Related Part Numbers
- MX5343
- NICE-MX5343
- Nice Apollo MX5343
- HySecurity MX5343
- Juno power supply assembly
- Assembly, Power Supply, Juno
Technician Note
Do not order this part by general appearance alone. Nice Apollo parts often share similar housings, harnesses, or cabinet layouts while using different part numbers, controller platforms, cable lengths, voltage requirements, or operator-specific mounting points.
Before Ordering
- Match the part number on the original part or current Nice Apollo parts diagram.
- Confirm the operator model and system generation before ordering.
- Check for damaged wiring, water intrusion, loose hardware, or worn related parts.
- Verify what is included in the package if hardware, keys, batteries, or accessories are needed.
- For powered components, have diagnosis and installation handled by a qualified gate technician when AC power or unsafe gate movement is involved.
Important Ordering Warnings
- Do not replace this part based only on symptoms. Battery, wiring, controller, charging, and mechanical binding should be checked first.
Professional Advisory
Gate operators are moving equipment and must be serviced with safety in mind. Always disconnect power as required by the manufacturer, keep monitored safety devices in place, and have a qualified gate technician handle electrical diagnosis, controller replacement, or unsafe gate behavior.
Product Questions and Answers
Is MX5343 the same as the Mercury 310 controller?
No. MX5343 is the Juno power supply assembly. The Mercury 310 controller is a separate control board used in the Juno system.
What Juno problems can point to the MX5343 power supply?
A failed or damaged power supply can be involved when the Juno operator will not maintain DC power, will not charge the battery properly, or has visible damage on the power supply assembly.
Does MX5343 fit every Nice Apollo slide gate operator?
No. It is commonly associated with the Juno slide gate operator platform. Older Apollo 7200, 7251, 7300, 7351, and other slide operators use different power and control assemblies.
Should the transformer be replaced with MX5343?
Only replace the transformer if testing or inspection confirms the transformer is also defective. MX5343 is the power supply assembly, while MX4859 is commonly referenced as the Juno transformer.
Can a homeowner install this part?
Low-voltage parts still sit inside an operator cabinet that may have AC power present. A qualified gate technician should handle diagnosis and replacement when incoming power, charging, or wiring damage is involved.
