Our take
Sharp's R-309Y manual covers the white R-309YW finish and gives exact family specifications: 1.1 cu. ft., 1,000 W microwave output, separate 1,500 W input, 120 V/60 Hz and eleven power selections. It is a home-use countertop model with published ventilation requirements. An exact Best Buy listing identifies the white R309YW variant and supplies an 11.25-in. turntable figure, which is kept separate from the manual's measurements. The manual lists Auto Cook, One Touch Cook and defrost options but does not confirm sensor cooking or a compatible trim kit. The historical Amazon ASIN did not load, so this documentation-based review uses a tagged model search rather than claiming an exact current ASIN.
A white, household-use countertop microwave for a measured location that can accommodate the 20.3-inch body width, 1.1-cu.-ft. cavity and Sharp's ventilation clearances..
Look elsewhere if you need sensor cooking, a verified optional trim-kit route, a smaller body or less counter clearance. A commercial application also calls for a model whose maker expressly classifies it for foodservice.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Sharp's manual defines W as white and lists 1.1 cu. ft. capacity with 1,000 W microwave output.
- The specification table separates 1,500 W electrical input from cooking output and supplies outside and cavity dimensions.
- Sharp documents eleven power selections, Auto Cook, One Touch Cook, defrost and a +30-second control.
- The exact Best Buy R309YW page verifies the white countertop variant and lists its removable turntable as 11.25 inches.
What to weigh up
- The 20.3 × 12.0 × 14.8-in. body needs more than its footprint because Sharp calls for three-inch ventilation gaps and overhead clearance.
- The manual's automatic functions do not establish sensor cooking.
- No model-specific trim kit is documented in the sources reviewed.
- The historical Amazon ASIN returned an internal error, so the destination is a tagged model search.
The key details
| Model covered | R-309YW |
|---|---|
| Capacity | Sharp lists 1.1 cu. ft. capacity and 1,000 W microwave output; 1,500 W is the separate input-power figure |
| Microwave output | Outside dimensions: 20.3 × 12.0 × 14.8 in.; cavity dimensions: 14.0 × 9.4 × 14.1 in. |
| Cooking approach | The R-309Y manual defines W as white; Best Buy's exact R309YW listing gives an 11.25-in. removable turntable |
| Installation options | 120-V AC, 60-Hz grounded supply; eleven power selections, Auto Cook, One Touch Cook, time/weight defrost and +30 seconds |
| Finish and turntable | Sharp requires three inches between the top, sides, rear and nearby surfaces; preserve the additional four-inch overhead space |
Performance figures are manufacturer claims. Source checked October 5, 2026. Regional models and included accessories can differ.
What the features mean for you
Keep the white W variant distinct
The frozen candidate identifies Sharp R-309YW. Sharp's shared R-309Y operation manual explicitly says the last letter indicates finish: K is black, W is white and V is silver. This supports the white model code rather than a generic R-309Y identity. The silver R-309YV is a separate finish variant already reconciled in the saved ledger; shared family documentation does not make its suffix interchangeable with W. Best Buy's exact listing uses the compact spelling R309YW and calls the product white and countertop, corroborating the source variant without changing the manufacturer's hyphenated code.
Capacity and body dimensions
Sharp's specification table gives 1.1 cu. ft. capacity, outside dimensions of 20.3 × 12.0 × 14.8 inches and cavity dimensions of 14.0 × 9.4 × 14.1 inches. Use the exterior measurements for shelf and counter planning, then compare the cavity with dishes you actually use. Capacity describes a nominal interior volume; it does not prove that a rectangular pan or tall mug will clear the walls. Best Buy lists an 11.25-inch removable turntable for the exact R309YW listing, a useful additional fit dimension. The maker manual does not include that tray diameter, so the tray measurement is attributed to the retailer.
Compare output and input as different measures
The Sharp manual lists 1,000 W as microwave energy output and 1,500 W as input power. Keep the two numbers in their own roles: output is the cooking figure for wattage comparison, while input is the electrical consumption figure. The same specification table calls for 120-V AC, 60-Hz single-phase grounding. Sharp's installation text gives an approximate current figure as well, but this review does not use it as a tag or substitute it for either wattage. Verify the location's grounding and follow the printed instructions rather than deriving a circuit recommendation from output alone.
Controls are documented, sensing is not
The operation manual labels Auto Cook, One Touch Cook, Defrost, Power, Clock, time-entry and Start/+30 SEC controls. The defrost function works by time or weight, and the table gives eleven power selections. These are useful distinctions for someone who wants preset controls alongside manual timing. They do not prove that the oven uses a sensor to detect food moisture or change a cycle automatically. Keep sensorCooking unknown even though automatic food options appear in the manual; the terminology in the control list is not a sensor specification.
Allow for the installation clearances
Sharp instructs users to place the oven on a level, flat surface and keep its ventilation openings clear. The manual calls for three inches between the top, sides, rear and adjacent surfaces, and separately says to leave about four inches of free height above the top. Those spaces add considerably to the nominal 20.3 × 14.8-inch footprint. Do not push the oven into a tight shelf or treat countertop instructions as built-in approval. The reviewed exact family manual does not identify an optional trim kit, so compatibility remains unconfirmed rather than absent or established.
Household classification and feature limits
Sharp calls the R-309Y a Home Use Carousel Microwave Oven and says it is not designed for industrial or laboratory use. The manual says it is not designed for industrial or laboratory use, so buyers seeking documented commercial equipment should choose a model whose maker specifies that use. The manual's warranty and operating instructions explain a household microwave use context, but this review does not infer durability or long-term performance. Sensor cooking, trim-kit compatibility and any other undocumented feature remain unknown. Choose another model when those verified features are requirements.
Use a search link for the unverified Amazon ASIN
The old Amazon B007EV5FUI page returned an internal error when reopened, and no current exact link is claimed. The affiliate destination searches for Sharp R-309YW White with buyershortlists-20. Check the complete W suffix and white finish in a result. The Best Buy page is used to corroborate the model and turntable detail, not to transfer its review material into this article or assert present offer availability. No current price, stock, sales or buyer-review claim is made.
What else to compare
If the published outside dimensions and ventilation gaps do not suit the counter, compare a smaller model whose manual gives complete clearance instructions. If sensor cooking or built-in trim-kit installation is essential, choose a model whose exact documentation confirms that feature. For foodservice use, require an explicit maker classification.
Before you buy
What is the Sharp R-309YW's capacity and output?
Sharp lists 1.1 cu. ft. capacity and 1,000 W microwave output, separate from 1,500 W input power.
Is R-309YW white?
Yes. Sharp's R-309Y manual defines the W suffix as white, and the exact Best Buy listing identifies R309YW as white.
Does it use sensor cooking?
The manual documents Auto Cook and One Touch Cook but does not confirm sensor cooking, so the manual does not confirm that feature.
How large is the turntable?
Best Buy lists an 11.25-in. removable turntable for R309YW; Sharp's manual does not give a tray diameter.
Can I install it with a trim kit?
The reviewed Sharp manual provides countertop clearances but does not name a compatible trim kit for R-309YW.
Does Amazon ASIN B007EV5FUI directly match the white model?
Its page returned an internal error, so use the tagged R-309YW search and verify the white W suffix.
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 Electronics Corporation R-309Y Home Use Carousel Microwave Oven operating manual ↗ — checked October 5, 2026.
- Sharp Electronics Corporation R-309Y operation manual checked 2026-10-05. Its cover defines K as black, W as white and V as silver and calls the family a Home Use Carousel Microwave Oven; the specification table gives 1.1 cu. ft., 1,000-W output, separate 1,500-W input, 120-V/60-Hz supply, dimensions and eleven levels (PDF pages 0 and 6). Sharp says it is not designed for industrial or laboratory use and gives countertop installation clearances (pages 2 and 5). ↗ — checked October 5, 2026.
- Best Buy's exact-model listing identifies model R309YW as white and countertop. Its specification record gives an 11.25-in. removable turntable; the current page extract repeats exact model and finish. Its customer-review content is not used. ↗ — checked October 5, 2026.
- Historical Amazon ASIN page individually reopened 2026-10-05 and returned an internal error. The affiliate destination is a tagged exact-model search, not a direct ASIN claim. ↗Paid link · We may earn a commission. — checked October 5, 2026.
The decision
Sharp documents R-309YW as the white finish of its 1.1-cu.-ft. R-309Y Home Use Carousel family, with 1,000 W output, 1,500 W input and eleven power selections. Best Buy lists an 11.25-in. tray for its exact white listing. Sensor cooking and trim-kit compatibility remain unconfirmed; Sharp classifies the family for home use. Use the tagged exact-model search because the old ASIN page failed.
Is it the right fit?
Check the exact model and today’s offers on Amazon.