Our take
The Panasonic NN-SN660S combines a 1.2-cu.-ft. cavity, 1,300-W output, 13.5-in. turntable, Inverter Technology and Genius Sensor functions. Its specification sheet lists 115 V / 60 Hz, so verify the actual rating plate before treating it as a U.S. 120-V match.
Compare it when inverter and sensor features matter and the actual unit's voltage label matches the intended supply; confirm color separately..
Do not select it for a hard 120-V requirement without confirming the exact appliance label, or for a finish-specific kitchen plan based only on the historical title.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Panasonic's model-paired sheet lists NN-SN660S separately with a 1.2-cu.-ft. cavity and 13.5-in. turntable.
- The sheet documents 1,300-W output, inverter technology, sensor cooking and sensor reheating.
- Ten power levels, three-stage cooking and Turbo Defrost are described for the model family.
What to weigh up
- The exact specification sheet prints 115 V / 60 Hz, not the finder’s strict 120-V supply target.
- A finish is not cleanly assigned to NN-SN660S in the scanned family table.
- Exact trim-kit fit, commercial-duty classification and current Amazon ASIN mapping are unknown.
The key details
| Model covered | NN-SN660S |
|---|---|
| Capacity | Capacity: 1.2 cu. ft.; the sheet distinguishes NN-SN660S from the larger NN-SN760S |
| Microwave output | Microwave output: 1,300 W; electrical input is separately listed as 1,460 W |
| Cooking approach | Cooking approach: Inverter Technology, Genius Sensor Cook/Reheat, Turbo Defrost and staged cooking |
| Installation options | Installation options: countertop microwave; specification sheet lists 115 V / 60 Hz and no exact trim kit is established |
| Finish and turntable | Finish and turntable: 13.5-in. removable turntable; exact NN-SN660S finish is not cleanly assigned by the sheet |
Performance figures are manufacturer claims. Source checked October 10, 2026. Regional models and included accessories can differ.
What the features mean for you
Do not merge NN-SN660S with NN-SN667B
Panasonic's specification sheet lists NN-SN660S as its own model alongside NN-SN760S. It is also distinct from NN-SN667B, which has a different exact code and separate product documents. Shared 1.2-cu.-ft. capacity or inverter branding is not enough to merge them. Search for NN-SN660S in full and confirm that suffix on the appliance and offer. The historical Amazon record did not establish a current exact listing, so the destination searches the model rather than asserting the old ASIN.
Use the tray measurement to check real dish fit
The paired Panasonic sheet gives a 1.2-cu.-ft. cavity and a removable 13.5-in. turntable for NN-SN660S. That measured diameter helps screen plates, but handles and rectangular dishes still need room to turn. Panasonic describes this as a countertop model, not a built-in installation. Measure the dish base and internal clearance and compare with your common cookware; capacity alone will not predict whether a bowl can rotate. The 13.5-in. tray is a concrete advantage over smaller models whose diameter is not documented, but it does not establish fit for every serving dish.
Pair inverter controls with sensor functions
The sheet documents Panasonic Inverter Technology, Genius Sensor Cook and Sensor Reheat, ten power levels, three-stage cooking and Inverter Turbo Defrost. Those features give this model a more extensive control set than the preset-only Willz listing or the unconfirmed sensor status on Emerson MW8998B. They do not guarantee a preferred result for every food; use the named functions as documented choices and follow the manual. If your routine does not use automatic programs or staged sequences, a simpler model may be enough.
Check the 115-volt specification against the actual unit
Panasonic's sheet lists 115 V / 60 Hz and separately states 1,460 W electrical input, while the product title supplies 1,300 W cooking output. Keep those values distinct. The finder asks for exact 120 V / 60 Hz to satisfy a standard U.S. hard condition; this recorded 115-V label is not represented as 120 V. Check the rating plate and instructions for the actual unit before using it in a 120-V installation. Do not rely on a plug shape or a nearby Panasonic model's supply label.
Leave finish and trim-kit claims unresolved
The frozen title says stainless steel, but the scanned finish table does not map the finish cleanly to NN-SN660S. Keep the variant field null until an exact model source makes that assignment. The reviewed sheet supports countertop use but does not establish a specific compatible trim kit or a commercial-duty rating. A family accessory route cannot automatically be assigned to this suffix. Check the actual exterior and any accessory label before planning a color match or cabinet opening, and treat the historic Amazon ASIN as unverified.
What else to compare
Before you buy
What is the NN-SN660S turntable size?
Panasonic's paired specification sheet lists a removable 13.5-inch turntable for NN-SN660S.
Does this model have sensor cooking?
The sheet names Genius Sensor Cook and Sensor Reheat among its documented features.
Is the input 1,300 W?
No. The sheet lists 1,300 W microwave output and separately lists 1,460 W electrical input.
Does it meet a 120-V requirement?
The sheet prints 115 V / 60 Hz; check the actual appliance rating plate before matching it to 120 V.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Panasonic NN-SN760S/NN-SN660S countertop specification sheet ↗ — checked October 10, 2026.
- Panasonic NN-SN760S/NN-SN660S countertop specification sheet, inspected 2026-10-10. It maps NN-SN660S to capacity, tray diameter, output, inverter/sensor controls, 1,460-W input and 115-V/60-Hz supply. ↗ — checked October 10, 2026.
The decision
The Panasonic NN-SN660S combines a 1.2-cu.-ft. cavity, 1,300-W output, 13.5-in. turntable, Inverter Technology and Genius Sensor functions. Its specification sheet lists 115 V / 60 Hz, so verify the actual rating plate before treating it as a U.S. 120-V match.
Is it the right fit?
Check the exact model and today’s offers on Amazon.