MT3608 Step-up (Boost) Converter Enclosure
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A compact protective inline enclosure designed specifically for the common blue MT3608 DC-DC step-up converter module.
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Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
Boost converters can generate significant heat under higher loads, so the enclosure includes ventilation slots above the inductor and IC area to improve passive cooling. A dedicated access hole also allows the onboard potentiometer to be adjusted with a small precision screwdriver without opening the case.
Both cable entry points are designed for thin round cables with an outer diameter of approximately 3.4 mm, making the enclosure suitable for custom LED power supplies, small DIY electronics projects, and low-voltage inline power applications.
Hardware Requirements
4× 2×6 mm self-tapping screws suitable for plastic (pan-head or countersunk)
Features
Passive cooling: Ventilation slots improve airflow and heat dissipation during continuous operation.
Trimmer access: The output-voltage adjustment potentiometer can be reached without opening the enclosure.
Secure fastening: Four screws hold the two halves firmly together.
Clean cable routing: Symmetrical entry and exit channels neatly guide and retain round cables.
After assembly, check and fine-tune the output voltage with a multimeter before connecting sensitive equipment.
Recommended Print Settings
Nozzle: 0.4 mm
Layer height: 0.20 mm
Supports: None required; both halves are designed to print flat
Perimeters/Walls: 3–4
Infill: 15–20%
Material Selection
PETG / ABS / ASA: Recommended, especially for continuous operation or higher loads. MT3608 modules can become quite warm depending on input voltage, output voltage, load current, and cooling conditions. Higher-temperature filaments provide better resistance to long-term softening or deformation.
PLA: Suitable for low-power applications where the converter remains well below temperatures that could soften the enclosure.