Looking for a built-in microwave that fits a compact 300mm (about 12″) depth? This guide highlights five well-suited models that maximize space while delivering reliable performance. These selections are ideal for small kitchens, apartments, or kitchen islands where depth is limited but cooking capacity remains important. Each option is chosen for clear installation fit, ease of use, and practical features. The buyer types below will help you pick the best match: space-conscious renovators, busy households needing bigger internal capacity, and those who want programmable or sensor cooking for convenience.
| Product | Best For | Key Benefit |
|---|---|---|
| Frigidaire Gallery GMBS3068BF | Large dish lovers in compact builds | 2.2 cu. ft. capacity with built-in trim kit options |
| Summit SMBI24 | 24″ wide spaces, modern kitchens | 1000W, trim kit included for built-in look |
| Summit OTR24 Over-the-Range | Under-cabinet or over-the-range installs | Stainless steel trim kit and multiple power levels |
| AAOBOSI 24 Inch Built-In | Versatile cooking with air fry and convection | 1.6 cu. ft, 10 modes, includes air fry |
| Panasonic NN-SN686S | High power, inverter efficiency | Inverter technology for even results |
Note: All models listed below are compatible with standard 24″ or similar cutouts commonly used in built-ins. Charcoal and trim kit availability varies by model and may affect final depth fit.
Frigidaire Gallery GMBS3068BF Microwave

Features: 2.2 cu. ft. cooking space; built-in trim kit options at 27″ and 30″ widths; sensor-based power and cook time adjustments for reliable results.
Best for: Homes needing a roomy interior in a built-in unit and a trim kit path to a seamless look. Ideal for families cooking larger dishes or multiple items at once.
Caution: Trim kit sold separately; ensure correct width for your cabinet opening before purchasing.
Summit SMBI24 Built-In Microwave

Features: 1000W microwave designed for built-in installation in 24″ wide openings; stainless trim kit included; multiple power levels and programmable multistage cooking.
Best for: Kitchens with a 24″ cutout seeking a mid-size internal capacity and a simple, kit-inclusive installation. Also suitable above or below counter installations.
Limitation: May require professional installation for seamless trim alignment in some cabinetry.
Summit 24” Over-The-Range Microwave

Features: 0.9 cu.ft. capacity; built-in trim kit for 24″ openings; multiple power levels and a clock/timer with front venting design suitable for professional-style installations.
Best for: Compact kitchens needing a space-saving over-the-range solution with a clean built-in appearance. Good for apartments or secondary kitchens.
Caution: Front-vented designs may require careful placement relative to cabinet clearance and ventilation paths.
AAOBOSI 24-Inch Built-In Microwave

Features: 1.6 cu. ft capacity; 1000W power; 10 cooking modes including air fry and convection; drop-down door; built-in sensor and auto cook options.
Best for: Modern kitchens needing versatile cooking modes (air fry/convection) in a built-in format. Suitable for smaller teams or households seeking automated cooking presets.
Limitation: Depth fit should be confirmed; some installations may require extra clearance behind cabinetry for airflow.
Panasonic NN-SN686S

Features: 1.2 cu. ft capacity; inverter technology for even heating; turbo defrost; 1250W output with efficient internal design; counter/cuilt-in flexibility.
Best for: Busy households needing quick, evenly cooked meals with dependable inverter performance in a compact footprint.
Limitation: Slightly smaller interior than some 2.0+ cu. ft models; consider capacity needs for larger platters.
Buying Guide: Key Purchase Considerations
- Depth fit: Confirm exact cabinet opening depth and ensure the chosen model’s depth aligns with your 12″ (300mm) constraint, including any trim kit requirements.
- Installation type: Decide between built-in, under-cabinet, or over-the-range. Built-ins often require trim kits; over-the-range models may need venting considerations.
- Interior capacity: If you regularly heat large dishes, prioritize models with 1.6 cu. ft or more; 0.9–1.2 cu. ft is typically suitable for compact meals and snacks.
- Power and features: Look for inverter or sensor cooking for even heating, and consider additional modes (air fry, convection) if desired.
- Trim kit availability: Some models require separate trim kits to achieve a flush, built-in look. Check compatibility and price.
- Ventilation and installation: Over-the-range units may require proper venting and clearance; built-in units should match cabinet dimensions and electrical access.
FAQ
- Q: What depth should I look for in a built-in microwave? A: About 12 inches (300mm) is a common compact depth; verify exact depth with the product specs and your cabinet cutout.
- Q: Do I need a trim kit for built-in microwaves? A: Many built-ins require a trim kit to mount flush with cabinetry; verify the kit’s model compatibility and availability.
- Q: Is inverter technology better for built-in microwaves? A: Inverter technology provides steadier power for even cooking and defrosting, reducing overcooking in some foods.
- Q: Can I install a microwave above the range? A: Yes, many models are designed for over-the-range installation, but ensure proper clearance, venting, and electrical access.
- Q: Which model is best for large families? A: Models with 1.6 cu. ft or larger interior capacity and sensor cooking are generally best for larger households.
- Q: Do these models support auto defrost or preset programs? A: Most listed models include sensor cooking, auto defrost, and multiple preset programs for convenience.