Our take
Sharp's exact service specifications identify R-308KW as a 1.0-cu.-ft. microwave with 1,100 W nominal output, separate 1,530 W input and roughly 13-A demand. Its applicable family operation manual includes R-308KW and defines the W suffix as white, while the K suffix is black; the service manual lists R-308KK separately, so keep the white KW distinct from black KK. The family directions provide a countertop clearance and reserve Sharp's RK-31K kit for R-312AK/AW, not R-308KW. The source's B000A6T0XM page returned an internal error, so the tagged model search avoids claiming that exact ASIN. This is a documentation-based review, not a personal test or buyer-review summary.
A household countertop model for buyers seeking a white 1.0-cu.-ft. oven with documented 1,100-W output and familiar touch controls, who do not need a built-in kit..
Do not choose it if you need a documented built-in kit, a confirmed turntable diameter, sensor-cooking documentation, a direct verified Amazon ASIN, or a commercial-duty classification. Confirm the white R-308KW label rather than accepting a similar R-308KK model.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Sharp's model-specific service table gives a 1.0-cu.-ft. cavity and 1,100 W nominal microwave output.
- The manual separates that output from 1,530 W electrical consumption and approximately 13 A, helping distinguish cooking rating from circuit demand.
- The family manual specifies W as white and the service manual treats R-308KK as a separate model, reducing the chance of mixing finishes and codes.
- The control complement includes popcorn, Minute Plus, shortcuts, reheat, cook, defrost, variable power, clock/timer and start controls.
What to weigh up
- The applicable Sharp manual says only R-312AK/AW use its RK-31K built-in kit, so R-308KW has no documented trim-kit route.
- The manuals show a turntable but do not state its diameter; measure the exact tray if cookware rotation matters.
- The control documentation does not confirm sensor cooking, and commercial-duty classification is not supplied beyond the home-use designation.
- The historical ASIN page returned an internal error; no exact current Amazon offer is established.
The key details
| Model covered | R-308KW |
|---|---|
| Capacity | 1.0 cu. ft. cavity |
| Microwave output | 1,100 W nominal microwave output, separate from 1,530 W power consumption and approximately 13 A |
| Cooking approach | Touch controls include popcorn, Minute Plus, shortcut, reheat, cook, defrost, clock/timer and variable power; sensor cooking is not confirmed |
| Installation options | 20.5 W × 12.25 H × 17.375 D in. outside; cavity 14.75 × 8.125 × 15.25 in.; family manual calls for at least 2 in. at sides, top and rear; RK-31K built-in kit applies only to R-312AK/AW; operation manual identifies this family for home use |
| Finish and turntable | Sharp defines K as black and W as white; R-308KW is white and R-308KK is a separate code. The reviewed manuals do not state turntable diameter |
Performance figures are manufacturer claims. Source checked October 5, 2026. Regional models and included accessories can differ.
What the features mean for you
The KW suffix identifies white, separate from R-308KK
The source calls the appliance Sharp R-308KW. Sharp's service manual names R-308KW and R-308KK as separate models with distinct parts, and the applicable operation manual defines K as black and W as white for this family. That supports a white R-308KW identity and keeps it separate from the black R-308KK, rather than merging nearby codes as aliases. The shared family operating instructions may describe common controls, but the exact service specification page is headed R308KW. Check the full suffix on a current unit or listing because the historical Amazon page for B000A6T0XM did not open.
Separate cooking output from electrical demand
Sharp's R308KW table gives 1,100 W nominal RF microwave energy as output. It separately lists 1,530 W power consumption and approximately 13 A at 120 V, 60 Hz. The higher consumption figure is not the cooking-output number; retaining both helps a shopper compare power ratings without confusing an appliance's draw with its microwave energy output. Sharp also specifies a 1.0-cu.-ft. cavity and dimensions. Check the internal opening and the dish itself for practical fit, since nominal capacity does not guarantee a particular plate or casserole will fit. The data are manufacturer ratings, not a cooking-speed test.
The control list describes conventional touch-operated programs
The exact R308KW control complement includes a popcorn pad, Minute Plus, shortcut pads, reheat, cook, defrost, variable power, a timer/clock, stop/clear and start. The operation manual also explains shortcut and cooking programs for this family. I found no sensor-cooking reference in that manual, but a missing reference does not prove that every used unit lacks a sensor feature; sensor-cooking status remains unknown. Use the actual control panel and model-specific instructions to check the programs on a second-hand or replacement unit.
Plan a countertop location; the built-in kit belongs to other codes
Sharp's operation manual asks for at least two inches of open space at the sides, top and rear and recommends counter space on at least one side. In the same manual, Sharp limits its RK-31K built-in kit to R-312AK/AW. R-308KW is a different model, and Sharp's documents do not list a kit for it; do not adapt another model's kit based on family resemblance. The applicable guide is titled for a Home Use Carousel Microwave Oven, confirming the manual's household-only use classification. Follow the supplied manual when positioning the oven and do not block its openings.
Check tray size and the exact Amazon model result
Sharp requires the turntable and support for operation, but the reviewed service and operation manuals do not state the turntable diameter. Measure the glass tray or request an exact Sharp part reference if a wide dish needs to rotate. The historical Amazon page for B000A6T0XM returned an internal error, so this entry uses a tagged search for R-308KW instead of asserting the old ASIN is an exact current item. Confirm the full KW suffix and white finish on a current listing. No price, availability, sales or Amazon-review claim is made.
What else to compare
If you need a supported built-in route, choose a model Sharp lists for the RK-31K kit or another exact approved installation. If known sensor controls, a specified turntable diameter, or commercial-duty classification matters, use a model with explicit documentation for that requirement. R-308KW remains a manufacturer-documented white 1.0-cu.-ft. countertop model with 1,100 W nominal output.
Before you buy
Is R-308KW the same model as R-308KK?
No. Sharp's service manual names them separately; the applicable family manual says K is black and W is white.
What capacity and output does R-308KW have?
Sharp lists 1.0 cu. ft. and 1,100 W nominal microwave output. It separately lists 1,530 W power consumption and approximately 13 A.
Can it be installed with a built-in kit?
Sharp's family manual says the RK-31K built-in kit is for R-312AK/AW only, not R-308KW.
Does it have sensor cooking?
The reviewed control and operation manuals do not identify sensor cooking, so that attribute remains unconfirmed.
What is the turntable diameter?
The manuals require a turntable but do not list its diameter; measure the exact tray or request an exact part specification.
Is commercial duty confirmed?
No. The applicable Sharp guide identifies this family as a Home Use Carousel Microwave Oven.
Is ASIN B000A6T0XM a direct match?
Its Amazon page returned an internal error. Use the tagged R-308KW search and confirm the white KW suffix on the current item.
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 R-308KW service specification and applicable R-308-family operation manual ↗ — checked October 5, 2026.
- Sharp Corporation R-308KK/R-308KW Service Manual mirror checked 2026-10-05. The combined cover names both separate exact model codes; page 7 is headed R308KW and specifies 1.0 cu. ft., 1,100 W nominal microwave output, 1,530 W consumption, approximately 13 A, dimensions and the control complement. This is manufacturer service documentation mirrored by ManualsLib. ↗ — checked October 5, 2026.
- Applicable Sharp R-308 family operation manual checked 2026-10-05. Its covered-model list includes R-308KW; the model legend defines K=black and W=white. The family is called a Home Use Carousel Microwave Oven; page 5 calls for at least 2 in. at sides, top and rear and says the RK-31K built-in kit applies only to R-312AK/AW. The manual text contains no sensor-cooking reference. ↗ — checked October 5, 2026.
- Saved secondary AJ Madison exact-model listing reference; it was reopened on 2026-10-05 but returned an internal error. No current offer/ASIN claim relies on this page; manufacturer manuals supply the identity and ratings. ↗ — checked October 5, 2026.
- Historical Amazon ASIN page returned an internal error when reopened 2026-10-05. The merchant destination is a tagged exact-model search, not a direct ASIN link. ↗Paid link · We may earn a commission. — checked October 5, 2026.
The decision
Sharp's R-308KW service table documents 1.0 cu. ft., 1,100 W output, 1,530 W consumption and about 13 A. The family manual defines W as white, distinguishes K as black, calls the group home use, and reserves its built-in kit for R-312 models. Tray diameter and sensor cooking remain unconfirmed. Amazon B000A6T0XM did not load; use the tagged exact-model search and verify the KW code.
Is it the right fit?
Check the exact model and today’s offers on Amazon.