Our take
Panasonic NN-SD945S is a large-capacity inverter sensor model with an unusually complete exact-model specification. Panasonic lists 2.2 cu. ft., 1,250-W cooking output, 1,460-W consumption, 120 V / 60 Hz, sensor cook and reheat, and a 420-mm turntable. It can be used on a countertop; the sheet also names trim-kit options, but conflicting saved kit tables prevent a reliable exact width-to-kit assignment. Treat that uncertainty as a practical installation limit rather than assuming any named kit fits.
Consider NN-SD945S when a large cavity, inverter power and sensor cook/reheat are priorities. Confirm whether the planned installation is countertop or the exact supported trim-kit path, and check the dedicated electrical requirements and current offer identity..
Choose a different model if you need an already reconciled trim-kit mapping, an exact current Amazon offer, a smaller cavity, or an electrical plan that has not been checked against the unit rating and circuit.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The exact sheet documents 2.2 cu. ft., 1,250-W output and a 16.5-in.-class turntable.
- Inverter, sensor cook/reheat, ten levels and three-stage cooking provide documented control differences.
- Panasonic lists 120 V / 60 Hz and distinguishes 1,250-W output from 1,460-W consumption.
What to weigh up
- Saved Panasonic documents conflict on the exact trim-kit size/model mapping.
- Its large housing and turntable need careful counter and dish measurements.
- The historical Amazon ASIN and source's discontinued model status do not establish a current offer.
The key details
| Model covered | NN-SD945S |
|---|---|
| Capacity | 2.2 cu. ft. stated capacity |
| Microwave output | 1,250 W cooking output; 1,460 W power consumption |
| Cooking approach | Inverter, sensor cook/reheat, ten levels and three-stage cooking |
| Installation options | Countertop use documented; optional trim-kit mapping conflicts across saved sheets |
| Finish and turntable | Stainless face with silver cabinet; 420-mm (about 16.5-in.) turntable |
Performance figures are manufacturer claims. Source checked October 10, 2026. Regional models and included accessories can differ.
What the features mean for you
What does the 2.2-cu.-ft. capacity add?
Panasonic's exact sheet lists a 2.2-cu.-ft. cavity and a 420-mm turntable. This is a larger nominal space than compact models such as the 1.0-cu.-ft. Sharp R-303TWC or 1.2-cu.-ft. Kenmore 63259. It can be a useful scale difference when you often place larger dishes inside, but nominal capacity does not guarantee that every platter clears the side walls as it rotates. Check both the tray and interior opening against the cookware you use, and measure the exterior body and open-door path before placing this full-size unit on a crowded counter.
How output, input and inverter relate
The sheet lists 1,250 W cooking power and 1,460 W power consumption as separate ratings. Use the first for output comparisons and the second when thinking about the appliance's electrical draw; neither should be substituted for the other. Panasonic also identifies the power supply as inverter technology. That is a documented design approach, not a claim that this review measured more even heating or shorter cooking times. The exact sheet states 120 V / 60 Hz, while the appliance's rating plate and local circuit remain the final installation references. Output is not a laboratory result or a guarantee for a particular dish.
Use the sensor and staged controls for named needs
Panasonic documents sensor cook and sensor reheat, ten power levels and three-stage cooking. These features separate the model from conventional presets: the sensor functions are explicitly identified by the maker, while staged programming gives the user a way to sequence more than one cooking phase. The sheet also lists turbo defrost, keep warm, quick minute and child lock. Program names do not guarantee a perfect result for every food amount or container, so follow the manual's directions. If sensor operation is central to your decision, compare the exact documented functions rather than relying on a generic title that uses the word smart.
What do the trim-kit documents establish?
Panasonic's sheet names optional 27-in. NN-TK932SS and 30-in. NN-TK922SS kits and describes the model as built-in/countertop. However, the saved Panasonic sheets conflict on size-to-model mapping, so this catalog does not mark trimKitCompatible true or promise either width. The countertop path is documented; a built-in plan needs a fresh exact-model kit cross-check, opening dimensions and installation instructions before purchase. A trim kit is a separate component unless the exact offer proves otherwise. If the cabinet route cannot be confirmed, use another model with a clear exact-code kit mapping or plan for freestanding placement.
Check the stainless and silver finish description
Panasonic's exact sheet describes a stainless-steel color with a silver cabinet. The record preserves that wording rather than treating every visible surface as stainless. That distinction can matter when the appliance sits beside other finishes or when a listing image shows only the front panel. Confirm the exact NN-SD945S suffix and the cabinet color in the product photo. Do not merge this model with another NN-SD or NN-SN identity simply because the capacity or sensor feature looks similar; the manual code is the boundary for product matching.
Compare it with another large sensor option
Frigidaire FFCE2238LB also lists a 2.2-cu.-ft. cavity and sensor cooking, but its family guide gives a 16-in. tray and 1,200-W output. Panasonic lists 1,250 W and a roughly 16.5-in. tray, plus inverter technology, while its trim-kit map is unresolved. Frigidaire has a clearer 120-V / 60-Hz family supply and 15-A entry but its exact page marks the model discontinued; no current offer is claimed. If precise tray size and output matter, compare the figures. If cabinet installation matters, neither model should be chosen until the exact kit route is confirmed.
Verify the current model and installation before ordering
Panasonic's support page records this model as discontinued, but that statement does not show whether any particular current seller has stock. The old Amazon ASIN B08BJSQQ5J did not establish an exact offer. The affiliate destination searches NN-SD945S with buyershortlists-20. Confirm full model code, condition, included turntable and any separate trim accessory on the result. The review is based on checked specification and support pages, not personal testing. It does not claim a present price, inventory, sales rank, customer rating or buyer-review consensus.
What else to compare
For another documented 2.2-cu.-ft. sensor model, compare Frigidaire FFCE2238LB, which has a 16-in. tray and 1,200-W output but is marked discontinued in its exact record. Panasonic adds 1,250-W output, a larger 420-mm tray and inverter controls; its exact trim-kit mapping still needs verification.
Before you buy
What output and input ratings does NN-SD945S list?
Panasonic lists 1,250 W cooking output and 1,460 W power consumption separately; verify the rating plate and circuit for the exact unit.
Does it have sensor cooking?
Yes. The exact Panasonic sheet lists sensor cook and sensor reheat, along with inverter operation and three-stage cooking.
How large is its turntable?
The exact sheet lists 420 mm, about 16.5 inches; measure your dishes because diameter does not equal usable rectangular cavity width.
Which trim kit fits this model?
The sheet names optional 27- and 30-inch kit codes, but saved Panasonic sheets conflict on the exact mapping, so verify the model-to-kit pairing before planning a cabinet installation.
Is the historical ASIN a current offer?
No current offer was verified. Panasonic's support page records the model as discontinued, and the affiliate link searches the full model code.
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-SD945S specification sheet ↗ — checked October 10, 2026.
- Exact-model specification sheet: installation, 2.2-cu.-ft. capacity, output/input, 120 V / 60 Hz, sensor functions, finish, tray and listed trim-kit codes. ↗ — checked October 10, 2026.
- Panasonic exact-model support page and countertop placement guidance; model support also records its discontinued status. ↗ — checked October 10, 2026.
The decision
Choose NN-SD945S when the large cavity, inverter and sensor functions fit. Confirm the actual offer and exact trim-kit instructions before a built-in plan.
Is it the right fit?
Check the exact model and today’s offers on Amazon.