Our take
Sharp documents the exact R-331ZS as a 1.1-cu.-ft. Home Use Carousel microwave with 1,000 W energy output, ten power levels and an 11.25-inch removable glass turntable. The operation manual separately lists 1,500 W input, approximately 13 A, 120 V/60 Hz, and four inches of ventilation room at the sides, rear and above. Sharp explicitly says the oven is not designed for industrial or laboratory use. Its spec sheet says sensor cooking, sensor reheat, convection and a trim kit are absent. The structured finish table conflicts with Sharp's prose, and the manual and sheet disagree on depth; neither color nor depth is used for matching. Amazon B00BKDIBE8 returned an internal error, so the tagged search is used without a direct-ASIN claim.
Sharp R-331ZS is a household countertop microwave with 1.1 cu. ft., 1,000 W output, ten power levels and a removable 11.25-inch glass turntable. Sharp's manual keeps 1,000 W cooking output separate from 1,500 W input and asks for a grounded 120-V/60-Hz supply at approximately 13 A. It recommends four inches at the top, sides and rear, which adds substantially to the cabinet footprint; Sharp's product materials give stable width and height of 20.3 × 12.0 inches. The manual and specification sheet disagree on depth (14.8 versus 14.9 inches), so measure the actual unit instead of relying on one depth figure. Sharp says the R-331ZS is for home use and not industrial or laboratory use. It has no documented sensor cooking or trim-kit route. Finish records conflict, so this review does not use color to match it. The Amazon page for B00BKDIBE8 returned an internal error; use the tagged exact-model search..
Do not choose this model if sensor cooking, an exact built-in trim-kit path or a tightly enclosed shelf is essential. Sharp requires about four inches of space around the cabinet. Treat it as a household oven, not an industrial or laboratory model. Confirm finish from the actual unit if stainless appearance is essential, because Sharp's structured table and prose disagree.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Sharp lists 1.1 cu. ft., 1,000 W cooking output and a removable 11.25-inch turntable.
- Ten power levels, one-touch controls, time and weight defrost, and +30-second start are documented.
- The manual separates output from 1,500 W input and gives grounded 120-V/60-Hz electrical guidance.
- Exact-model instructions spell out four-inch clearance and household-use classification.
What to weigh up
- Four inches of clearance at the sides, rear and top adds space beyond the unit dimensions.
- Sensor cooking, sensor reheat, convection and trim-kit compatibility are explicitly absent.
- The manufacturer conflicts with itself on finish, and its manual/spec sheet give 14.8- and 14.9-inch depths respectively.
- The historical Amazon ASIN did not load, so the affiliate route is an exact-model search.
The key details
| Model covered | R-331ZS |
|---|---|
| Capacity | Sharp's exact-model sheet lists 1.1 cu. ft. and exterior dimensions of 20.3 inches wide by 12.0 inches high. Its 14.8-inch manual depth and 14.9-inch sheet depth conflict, so confirm the actual unit for a tight fit. |
| Microwave output | Sharp lists 1,000 W cooking output separately from 1,500 W input and specifies grounded 120 V/60 Hz power at about 13 A. The sheet lists ten power levels. |
| Cooking approach | The R-331ZS sheet says sensor cooking, sensor reheat, convection and a trim kit are absent. Controls include one-touch presets and defrost; these are not sensor features. |
| Installation options | Sharp directs flat-surface placement and four inches of clearance at the top, sides and rear. It classifies the model for home use and says it is not for industrial or laboratory use. |
| Finish and turntable | The removable glass turntable is 11.25 inches. Sharp's finish table says black with stainless trim, while its prose and Best Buy call it stainless; keep finish unknown. Historical ASIN B00BKDIBE8 failed, so use the tagged model search. |
Performance figures are manufacturer claims. Source checked October 4, 2026. Regional models and included accessories can differ.
What the features mean for you
The full R-331ZS code identifies a household Carousel oven
Sharp's operation manual names model R-331ZS and calls it a Home Use Carousel microwave. It says the oven is not designed for industrial or laboratory use. The exact model remains a countertop candidate because the manual calls for a flat surface and the product record identifies the same model; do not infer a separate commercial-duty rating from the 1,000-W output.
Keep cooking output separate from electrical input
Sharp lists 1,000 W energy output and separately lists 1,500 W input. The manual gives 120 V/60 Hz, approximately 13 A and a grounded outlet. These numbers answer different questions: use the supply and input information to plan the circuit, not the lower cooking-output number alone.
The glass tray has a published 11.25-inch diameter
Sharp lists a removable 11.25-inch glass turntable and ten power levels. The manual's control diagram includes one-touch cooking, timed defrost, weight-based defrost and a +30-second key. The spec sheet explicitly says sensor cooking and sensor reheat are absent, so those one-touch shortcuts should not be described as sensor functions.
This is countertop placement without a trim kit
The manual directs users to install the oven on a level, flat surface and allow four inches between the top, sides and rear and nearby surfaces. Sharp's exact-model spec sheet says Trim Kit: No. Plan it as a ventilated countertop appliance, not a cabinet install that assumes a built-in kit.
Use caution with finish and depth measurements
Sharp's structured design table says black cabinet and black door with stainless trim, but its descriptive paragraph calls the finish brushed stainless; Best Buy also uses a stainless-steel product title. The manual gives 14.8 inches of depth and the Sharp sheet gives 14.9 inches. Since the sources conflict, finish and depth are not matching tags here. Verify the actual unit and clearances where either detail matters.
Amazon could not confirm the historical listing
The frozen row associates ASIN B00BKDIBE8 with R-331ZS. The current Amazon route returned an internal error, so it did not establish the relationship. The manufacturer verifies the model itself; the affiliate link searches the exact R-331ZS model and does not claim that the ASIN matches.
What else to compare
If a stainless finish must be confirmed from an unconflicted manufacturer record, do not choose this R-331ZS entry on color: Sharp's structured finish table and prose disagree. For a separate household model with a different capacity and published turntable figure, compare Sharp R-308JK. Keep their exact model codes, output ratings and ventilation instructions separate.
Before you buy
What capacity and output does Sharp list?
The exact spec sheet gives 1.1 cu. ft. and 1,000 W output; the manual separately lists 1,500 W input.
What electrical connection does the manual require?
Sharp lists a grounded 120-V/60-Hz supply at approximately 13 A.
How large is its turntable?
Sharp lists a removable 11.25-inch glass turntable.
Does it have sensor cooking?
No. Sharp's exact-model sheet says sensor cooking and sensor reheat are absent.
Can it be installed with a trim kit?
No. The exact-model specification lists no trim kit; the manual describes flat-surface placement.
How much ventilation space is required?
The manual calls for four inches at the sides, rear and top.
Is the cabinet definitely stainless steel?
The sources disagree. Sharp's structured table says black cabinet and door with stainless trim, while its prose and a retailer call it stainless. Finish is not used to match this model.
Is the outside depth 14.8 or 14.9 inches?
Sharp's manual says 14.8 inches and the exact specification sheet says 14.9; confirm the actual unit rather than rely on a single figure.
Does Amazon ASIN B00BKDIBE8 match R-331ZS?
The direct Amazon route returned an internal error. Use the tagged exact-model search; no ASIN match is claimed.
Is this a commercial microwave?
No. Sharp calls it a Home Use Carousel oven and says it is not designed for industrial or laboratory use.
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.
- Sharp exact-model R-331ZS product specification sheet ↗ — checked October 4, 2026.
- Sharp exact-model specification sheet: structured finish, capacity, output, controls, turntable, sensor/trim/convection fields and conflicting depth/finish prose ↗ — checked October 4, 2026.
- Sharp exact-model operation manual: R-331ZS model identification, Home Use classification, 1500-W input/1000-W output, 120-V/60-Hz/approx.13-A supply, flat-surface installation and four-inch clearance ↗ — checked October 4, 2026.
- Best Buy exact-model catalog identifies R-331ZS and uses a stainless-steel title; its finish label conflicts with Sharp's structured finish table ↗ — checked October 4, 2026.
- Historical Amazon ASIN checked 2026-10-04; route returned an internal error and did not verify the variant ↗Paid link · We may earn a commission. — checked October 4, 2026.
- Search this model on Amazon · Tagged Amazon exact-model search used because the historical ASIN could not be verified ↗Paid link · We may earn a commission. — checked October 7, 2026.
The decision
Sharp R-331ZS is a 1.1-cu.-ft. household countertop microwave with 1,000 W output, ten power levels and an 11.25-inch glass turntable. It requires 120 V/60 Hz, approximately 13 A and four inches of clearance around the unit; the sheet says there is no sensor cooking or trim kit. Finish and depth are conflicted in Sharp's own documents, so they are not used for matching. Amazon B00BKDIBE8 could not be checked; use the tagged exact-model search.
Is it the right fit?
Check the exact model and today’s offers on Amazon.