Our take
Panasonic NN-SB658S is a conventional 1.3-cu.-ft. countertop microwave with 1,100-W output, Turbo/Auto Defrost and a specific stainless/silver/black finish. Panasonic's official page documents membrane controls, ten power levels and auto-reheat/cook; it explicitly says there is no Sensor Cook or Keep Warm. The manual lists 1,500-W input separately from microwave output and specifies 120 V / 60 Hz. That makes it a better fit for someone wanting clear manual controls than for a sensor-focused routine. Tray diameter and trim-kit compatibility remain unknown, and the renewed historical ASIN is not verified.
A straightforward 1.3-cu.-ft. option for users who value manual levels and defrost controls more than sensor cooking or cabinet installation..
Choose another model if you require sensor cooking, Keep Warm, a measured platter size, cabinet conversion or an exact verified direct Amazon offer. Confirm the complete NN-SB658S code and unit label.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Panasonic documents a 1.3-cu.-ft. countertop cavity with 1,100-W microwave output.
- The official manual separates 1,500-W input from output and confirms 120 V / 60 Hz.
- Turbo/Auto Defrost, ten levels, auto-reheat/cook and child lock are documented.
- The official finish description distinguishes stainless front, silver cabinet and black trim.
What to weigh up
- Panasonic explicitly lists no Sensor Cook and no Keep Warm for this model.
- The sources do not give a numeric turntable diameter or confirm a trim-kit route.
- The renewed historic ASIN mapping is unverified and is not used as a direct link.
- Its feature set favors manual and preset operation rather than sensor-guided cooking.
Specifications and exact model details
The key details
| Model covered | NN-SB658S |
|---|---|
| Capacity | Capacity: Panasonic lists 1.3 cu. ft. for NN-SB658S. |
| Microwave output | Microwave output: 1,100 W, separate from the documented 1,500-W input. |
| Cooking approach | Cooking approach: membrane controls, ten levels, Turbo/Auto Defrost and auto-reheat/cook; no Sensor Cook or Keep Warm. |
| Installation options | Installation: Panasonic support confirms counter placement and the manual specifies 120 V / 60 Hz; no trim kit is identified. |
| Finish and turntable | Finish and turntable: stainless front, silver cabinet and black plastic trim are documented; numeric turntable diameter is not stated. |
Performance figures are manufacturer claims. Source checked October 12, 2026. Regional models and included accessories can differ.
Full review: how the features affect your choice
What the features mean for you
Choose controls for the jobs you actually use
Panasonic documents a membrane control panel, ten power levels, Turbo/Auto Defrost, and auto-reheat/cook functions. These give users several ways to set time, power or a listed routine. Panasonic also explicitly says this model has no Sensor Cook and no Keep Warm. If automatic moisture sensing is your central need, this is not a substitute; if manual levels and defrost control are more important, its documented interface is a better match.
Compare the 1,100-W output without confusing input
The exact Panasonic manual lists 1,100 W microwave output and 1,500 W input. Output is the useful figure for comparing microwave cooking ratings; input is a separate electrical draw. The same manual specifies 120 V / 60 Hz and a grounded, dedicated circuit direction. Check the rating label and local outlet setup rather than using the output number to guess circuit fit. The review makes no timed-cooking or test-performance claim.
Use 1.3 cu. ft. as a starting size check
Panasonic lists a 1.3-cu.-ft. cavity, between common compact and larger family-size models. That nominal volume can help screen the pool, but it does not establish whether a particular casserole dish or travel cup fits. The exact official sources do not give a turntable diameter. Measure your cookware and confirm the interior dimensions and tray movement with the manufacturer if a specific vessel is a regular part of the routine.
Verify countertop placement and keep trim status unknown
Panasonic's model support page identifies NN-SB658S as a countertop oven. No exact optional trim kit is identified in the reviewed materials. Use the maker's countertop ventilation instructions and do not assume a generic frame enables built-in placement. If cabinet conversion is important, select a Panasonic code with an exact matching kit reference and confirm that the kit is still appropriate for the model and opening.
Interpret the finish as three separate surfaces
Panasonic's model page describes a stainless front, silver cabinet and black plastic trim. That is more precise than calling the whole exterior stainless steel. Compare this combination with the actual kitchen finish and check the exact code in any offer. The renewed candidate title does not prove a current condition or seller identity, so the product record keeps the historical ASIN unverified and uses an exact-code search link.
Know when to prefer another Panasonic model
A user wanting sensor cooking should compare a verified sensor model such as Kenmore 79152 or Panasonic NN-H965BFA, while someone wanting a larger cavity may prefer a 2.2-cu.-ft. option. NN-SB658S offers a smaller non-sensor route with documented supply and output. This is an evidence-based review of instructions and model facts, not personal testing or a summary of product ratings; it makes no current price or availability claim.
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Before you buy
Does NN-SB658S have Sensor Cook?
No. Panasonic's exact model specifications explicitly list Sensor Cook as unavailable.
What is the microwave output?
The official manual lists 1,100-W output and separate 1,500-W electrical input.
Does it have Keep Warm?
No. Panasonic's feature page states that Keep Warm is not available on NN-SB658S.
What is the supply rating?
The exact manual specifies 120 V / 60 Hz; confirm the unit plate and circuit before connection.
What finish does Panasonic document?
It is a stainless front with silver cabinet and black plastic trim.
Is a turntable diameter published?
The saved Panasonic pages do not state a numeric tray diameter for this model.
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 and review basis
Sources & review basis
We use the linked product documentation for the features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- Panasonic NN-SB658S features and specifications ↗ — checked October 12, 2026.
- Panasonic exact-model features/specifications page. Gives capacity, output, finish, membrane panel, levels and options, and explicitly lists Sensor Cook and Keep Warm as unavailable. ↗ — checked October 12, 2026.
- Panasonic NN-SB658S operating manual. Documents 120 V / 60 Hz, controls, defrost and menu operation, child lock and separate input/output ratings. ↗ — checked October 12, 2026.
- Panasonic model support page confirming NN-SB658S countertop placement. ↗ — checked October 12, 2026.
Is it the right fit?
Check the exact model and today’s offers on Amazon.