Our take
The Sharp R-408JK is a large 1.6-cu.-ft. black Carousel microwave documented for household use. Sharp's R-408J/JW manual maps the J-family color suffix K to black, so the historical model code resolves to the black R-408JK variant rather than the white R-408JW. Its 1,200 W output is the microwave cooking figure measured by the IEC procedure; the same manual separately lists 1,700 W electrical input and 14.3 A. Keep those figures distinct when comparing output and checking a circuit. The R-408J family is also separate from smaller Sharp models such as R-305KS and R-315JS. ASIN B0002ATFD6 remains a historical identifier only, so the tagged search uses the full R-408JK code.
A large black countertop microwave for users who value a 14⅛-inch rotating tray, defined manual controls, and a documented optional built-in path..
Choose another model if you need an exact Amazon offer already proven to match, confirmed sensor cooking, a compact footprint, or a built-in installation without checking the required kit and opening.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- Sharp specifies 1.6 cu. ft., 1,200 W microwave output, and a 14⅛-inch rotating turntable.
- The manual documents a broad set of timed and one-touch controls, including Cook Center, reheat, auto defrost, popcorn, Keep Warm, and Hot Water.
- The manual identifies the separate black RK-46K24 built-in kit for this exact color variant.
What to weigh up
- The body is about 21 21/32 inches wide and 41 lb., with two inches of clearance required at the sides, top, and rear.
- The model documentation reviewed here does not identify a humidity-sensor cooking feature.
- The exact historic Amazon ASIN has not been verified, and the built-in kit must not be presumed part of an offer.
The key details
| Model covered | R-408JK |
|---|---|
| Capacity | 1.6 cu. ft. stated cavity capacity and 1,200 W microwave output by the IEC test method |
| Microwave output | 14⅛-in. rotating Carousel turntable; outer dimensions 21 21/32 × 12⅜ × 18 7/16 in.; approximate weight 41 lb. |
| Cooking approach | 120 V/60 Hz supply; 1,700 W and 14.3 A electrical input, distinct from microwave output |
| Installation options | Cook Center, auto defrost, reheat, popcorn, three-stage cooking, Keep Warm, Hot Water, and Night Light |
| Finish and turntable | Black R-408JK; optional black built-in kit RK-46K24 is separate and not assumed included |
Performance figures are manufacturer claims. Source checked October 4, 2026. Regional models and included accessories can differ.
What the features mean for you
A larger capacity with a distinct output figure
Sharp lists 1.6 cubic feet of cavity volume and 1,200 W microwave output for the R-408J family. At 15 23/32 × 9 21/32 × 17 7/8 inches, the documented cavity dimensions give more context than capacity alone, but do not guarantee that a particular dish or handled platter will fit. The turntable is 14⅛ inches across; cookware must also clear the cavity walls as it rotates. In the electrical section, Sharp lists 1,700 W and 14.3 A input on a 120 V, 60 Hz supply. Those input figures describe the electrical draw, not cooking output. The manual recommends a grounded supply with 15 A or more protection and suggests a separate circuit, so buyers should use the actual installation requirements rather than infer them from the 1,200 W rating.
Preset help without a documented sensor claim
The R-408J control system has a Cook Center for one-touch foods, plus separate reheat, defrost, and popcorn controls. Other named functions include Hot Water, a 15-minute Keep Warm cycle, Minute Plus, and three-stage programming. These are concrete control options for a routine that includes common presets and timed cooking. The manual also says that final preset results depend on the food's initial temperature, shape, and quality and instructs the user to check food and add time when needed. Although one-touch cooking can sound automatic in advertising, the retrieved operation manual contains no sensor-cooking description. I leave sensorCooking unknown rather than treating the preset controls as proof of humidity sensing or claiming that the model definitely lacks every possible sensor.
Turntable clearance and countertop placement
Sharp says to plan for counter space and allow at least two inches at both sides, above, and behind the oven for air circulation. The outside body is 21 21/32 inches wide, 12 3/8 inches high, and 18 7/16 inches deep, with approximate weight 41 pounds. Check both the counter depth and overhead clearance before selecting a location; the manual cautions against placement next to or above heat-generating appliances. Sharp requires the turntable and support to be present during use. The stated 14⅛-inch diameter is a comparison measure, not a promise that every dish of that width will rotate without touching the cavity.
Optional built-in route with an exact kit code
The manual explicitly supports a cabinet or wall installation using Sharp's black built-in kit RK-46K24 for R-408JK; the white R-408JW uses a different code, RK-46W24. The kit includes ducts and finish trim strips and is ordered separately. That model- and color-specific evidence supports trimKitCompatible=true for the matcher, but it does not establish that the accessory is packed with the microwave or that an arbitrary opening will fit. Follow the kit instructions for ducting and power-supply location, keep the oven away from heat sources, and verify the opening measurements for the actual installation. If the appliance will remain on the counter, use the documented clearance instructions rather than enclosing it without the kit.
Home-use identity and exact-model search
Sharp calls the R-408J a Home Use Carousel Microwave Oven and says it is not designed for industrial or laboratory use. That supports household classification in the profile; it is not a manufacturer classification for foodservice equipment. The suffix map in the same Sharp manual makes K black and W white, while the exact saved source title names R-408JK in black. The manual catalog index separately lists R-408JK and R-408JW within the document family. ASIN B0002ATFD6 could not be confirmed as a current exact listing, so the destination searches for the full Sharp R-408JK identifier and carries the required affiliate tag. This review uses product documentation only; it does not describe personal testing, buyer-review trends, current price, stock, or sales rank.
What else to compare
For a smaller Sharp, R-305KS is a 1.0-cu.-ft., 1,100 W stainless model with a 12⅝-inch tray; R-315JS is a 1.2-cu.-ft., 1,200 W model; the R-408JK instead offers 1.6 cu. ft. and a 14⅛-inch tray. Compare the actual exterior width and circuit requirements alongside capacity. If trim-kit installation matters, verify each exact kit code and opening rather than assuming family kits interchange.
Before you buy
What does the K suffix mean in R-408JK?
Sharp's R-408J/JW manual maps K to black and W to white.
How much capacity and microwave output does Sharp document?
The manual specifies 1.6 cu. ft. and 1,200 W output by the IEC test procedure; it separately lists 1,700 W electrical input.
What turntable does it use?
Sharp specifies a 14⅛-inch rotating Carousel turntable.
Which trim kit is documented for R-408JK?
The black R-408JK uses optional kit RK-46K24; it is separate, and the white R-408JW has a different kit code.
Does the manual confirm sensor cooking?
No sensor-cooking feature is described in the reviewed manual, so the profile leaves that attribute unknown rather than inferring it from presets.
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-408J/JW operation manual ↗ — checked October 4, 2026.
- Sharp R-408J/JW operation manual: color suffix, home-use classification, countertop clearances, optional RK-46K24 kit, features, electrical data, dimensions, capacity, output, and turntable ↗ — checked October 4, 2026.
- R-408J operation-manual catalog cross-check for the R-408JK/JW family ↗ — checked October 4, 2026.
The decision
Choose the Sharp R-408JK if its documented 1.6-cu.-ft. cavity, 1,200 W output, 14⅛-inch Carousel tray, and control options match your routine and available counter space. It is the black R-408J variant. The optional black built-in kit RK-46K24 is model-specific and separate. Check electrical supply, ventilation clearances, and actual fit; sensor cooking and the current exact Amazon ASIN remain unconfirmed.
Is it the right fit?
Check the exact model and today’s offers on Amazon.