Our take
R-309YK is a black, 1.1-cu.-ft. countertop microwave with a precise 11.25-inch turntable and 1,000-W output. It is a useful compact comparison when those fit details suit the routine, but the source conflict on power levels and absence of a kit should remain visible.
For a household counter that suits a 1.1-cu.-ft. cavity and 11.25-inch turntable. Measure dishes carefully and keep it as a countertop model without a trim-kit assumption..
Choose a different model if you need sensor cooking, a documented trim-kit route, or a confirmed power-level count for a tightly specified workflow. Do not use the unresolved ZR309YK listing as proof of this exact model.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Sharp identifies the black finish, exact model family, 1.1-cu.-ft. capacity and 1,000-W output.
- The specification gives an 11.25-inch glass tray, making dish clearance easier to compare.
- The exact sheet states no trim kit, so the intended countertop boundary is clear.
What to weigh up
- The spec sheet lists ten power levels while the R-309Y manual lists eleven; the exact count is unresolved.
- Sensor cooking is not listed, and the specified installation is countertop only.
- The old Amazon ASIN is unverified, while the similar ZR309YK record remains a separate evidence gap.
The key details
| Model covered | R-309YK |
|---|---|
| Capacity | Capacity: 1.1 cu. ft.; removable 11.25-inch glass Carousel turntable. |
| Microwave output | Microwave output: 1,000 W; the family manual lists 1,500 W input separately. |
| Cooking approach | Time/weight defrost and one-touch menu buttons are documented; power-level count conflicts between sources. |
| Installation options | Countertop model; the exact specification sheet says no trim kit. |
| Finish and turntable | Black variant and 120-V/60-Hz supply are documented; sensor cooking is not listed. |
Performance figures are manufacturer claims. Source checked October 11, 2026. Regional models and included accessories can differ.
What the features mean for you
Keep the Y-family suffix and Z-clue distinct
Sharp's family manual explains that R-309Y is followed by a letter for color, with K for black, W for white and V for silver. The exact specification sheet uses the compact spelling R309YK. That evidence supports the frozen R-309YK identity. It does not establish that a separate title with an extra leading Z, ZR309YK, is the same model or ASIN. Keep those two source records distinct until a maker crosswalk is available. This preserves a useful black-model page without silently repairing another candidate's identity.
Use the tray diameter as a practical dish limit
Sharp lists a 1.1-cu.-ft. cavity and a removable 11.25-inch glass turntable. The tray number is especially useful for round plates: an oversized dish may not rotate without contacting the walls even when the capacity sounds sufficient. Measure the food container itself, not just the nominal cubic-foot rating. The body is about 20.3 inches wide, 12 inches high and 14.8 inches deep in the family manual. A buyer needing a larger turntable can compare Sharp SMC1843CM's 15-inch tray, while accepting its larger 1.8-cu.-ft. footprint.
Keep the power-level discrepancy unresolved
The exact R309YK specification sheet lists ten power levels, while the R-309Y family operating manual lists eleven power selections. Both sources identify the model family and neither resolves why the counts differ. This review therefore does not promise a definitive number. The sources agree on 1,000 W microwave output, and the manual separately lists 1,500 W input. Buyers who need a particular number of selectable settings should inspect the control panel and exact unit documentation rather than infer that one source's value applies to every revision.
Do not expect sensor or trim-kit controls
Sharp's specification lists time and weight defrost and several one-touch menu controls, but it does not list sensor cooking. It also states that no trim kit is available. Those boundaries make the R-309YK a countertop microwave for a user who is comfortable entering a manual time or using the listed shortcuts. A buyer looking for sensor cooking and a documented built-in path can compare SMC1843CM instead, which has named sensor functions and optional RK49 kits. The R-309YK's smaller cavity and tray remain useful if counter space is the priority.
Check the actual offer separately from the fixed model facts
The R-309YK candidate's historical Amazon page returned a cache miss, so the catalog uses an exact-model search link. It does not claim the old ASIN is still a valid offer or that a current listing has the same condition and accessories. Confirm the full R-309YK name and black suffix on any offer. The technical sources establish fixed model data but do not provide a present price or stock check. The model's U.S. manual identifies 120 V/60 Hz, and the site installation guidance calls for a flat, ventilated counter position.
What else to compare
Before you buy
How many power levels does the R-309YK have?
Sharp's specification sheet says ten, while the family manual says eleven; the count is left unresolved because the sources conflict.
Does this model have a trim kit?
The exact R309YK specification sheet says no trim kit; this entry treats it as a countertop model.
Is ZR309YK the same model?
No saved source maps the extra-Z clue to R-309YK, so the separate ZR309YK candidate remains unresolved.
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 R309YK specification sheet and R-309Y family manual ↗ — checked October 11, 2026.
- Sharp R309YK specification sheet. Rechecked 2026-10-11: black finish, 1.1-cu.-ft. capacity, 1,000-W output, ten listed power levels, 11.25-inch glass turntable, defrost and no trim kit. ↗ — checked October 11, 2026.
- Sharp R-309Y family operating manual. Rechecked 2026-10-11: suffix K means black, countertop placement and 120-V/60-Hz supply; manual lists 1,500-W input, 1,000-W output and eleven power selections, which conflicts with the specification sheet's ten-level value. ↗ — checked October 11, 2026.
The decision
R-309YK is a black, 1.1-cu.-ft. countertop microwave with a precise 11.25-inch turntable and 1,000-W output. It is a useful compact comparison when those fit details suit the routine, but the source conflict on power levels and absence of a kit should remain visible.
Is it the right fit?
Check the exact model and today’s offers on Amazon.