Our take
Sharp R-315JS is a silver, 1.2-cu.-ft. home-use countertop microwave with a documented 1,200 W IEC output rating and a 12 5/8-inch turntable. Its manual gives a broad Auto-Touch feature set, including popcorn, cook and reheat menus, defrost, and short-cut functions; the exact R315JS specification record says sensor cooking and a built-in trim kit are not included. The model has useful measurable fit details, though the available exterior-depth figures conflict. Choose it for its size and control variety only after confirming the physical dimensions and exact silver/stainless-trim variant.
A mid-size household countertop microwave with multiple dedicated cooking, reheating, and defrost menus.
It is a poor fit if you require sensor cooking, an optional built-in trim kit, a compact footprint, or dimensions that are consistent across the available records.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- The Sharp manual explains that the R-315J suffix S denotes silver and lists exact capacity, output, electrical ratings, and turntable size.
- The exact R315JS specification page identifies countertop placement and separately describes its stainless-steel door trim.
- The control list includes multiple cook, reheat, defrost, popcorn, power-level, timer, and programmable-stage options.
What to weigh up
- Sharp's manual and the retailer's detailed specifications report different exterior depths, so measure the actual unit before arranging a tight counter space.
- The exact-model record says this model has no sensor-cooking setting and no optional built-in trim kit.
- The 1.2-cu.-ft. cavity may be too small for buyers seeking the larger interior volume of 1.5-cu.-ft. and above models.
The key details
| Model covered | R-315JS |
|---|---|
| Capacity | 1.2 cu. ft. |
| Microwave output | 1,200 W IEC microwave output; manual lists 1,680 W electrical input at 120 V / 60 Hz |
| Cooking approach | 11 power levels; six cook, six reheat, four defrost options; three programmable stages |
| Installation options | Countertop installation; manual calls for 2-in. side, top, and rear airflow space; no trim kit listed |
| Finish and turntable | Silver S suffix with stainless-steel door trim; 12 5/8-in. turntable |
Performance figures are manufacturer claims. Source checked October 4, 2026. Regional models and included accessories can differ.
What the features mean for you
A distinct silver R-315J variant
Sharp's operation manual names the family as R-315J followed by a letter indicating color, with S identified as silver. AJ Madison's exact R315JS record uses the same model letters and describes a silver appearance with stainless-steel door trim. That combination supports the exact R-315JS variant in this entry. It is not the previously documented R-220KW: the two model codes, finish codes, cavity sizes, and output ratings are different. The old source title and ASIN B0002ATFCC remain an unverified lead for current Amazon identity, so the purchase link is a tagged search for R-315JS rather than a direct ASIN link. Check the item label and seller details for the S suffix, because “Sharp microwave” alone is not enough to distinguish it from other R-315 models.
Mid-size cavity and a measurable platter reference
Sharp specifies 1.2 cubic feet and a 12 5/8-inch diameter turntable in the R-315J manual. The cited retailer's exact R315JS listing gives the same tray size and countertop classification. These numbers provide a practical comparison against compact models such as the 0.7-cu.-ft. CHM770W, while remaining smaller than several large-capacity ovens in this set. Capacity and tray diameter do not guarantee that a rectangular dish, tall container, or platter with handles will rotate freely. Compare the manual's cavity dimensions with the cookware you actually plan to heat. The manufacturer itself cautions that its calculated capacity is based on maximum cavity width, depth, and height and that actual food-holding capacity is less, so use the volume as a category measure rather than a promise of usable dish space.
Output is separate from wall-power requirements
The manual identifies 1,200 W as microwave output measured using the IEC test procedure. It separately lists single-phase 120 V, 60 Hz, AC power and 1,680 W required input, plus 14.2 amps. That distinction matters: use the 1,200 W figure when comparing stated cooking output, not when estimating the appliance's electrical draw. Sharp's grounding instructions recommend a protected 15-amp-or-more supply and a separate circuit for the oven. Check the appliance rating plate and local electrical requirements before installation. These published ratings are a specification comparison; they do not establish a cooking-time advantage in a particular kitchen and are not a personal performance test.
Dedicated keys cover several routine tasks
The operation manual documents popcorn, defrost, reheat/cook, and short-cut functions, while AJ Madison's exact-model listing counts six cooking, six reheating, and four defrost options. It also lists 11 power levels, a kitchen timer, child lock, and three programmable stages. These controls offer more ways to select a named task than a bare time-and-power interface, but the available exact-model specification explicitly reports no sensor-cooking settings. Treat the six cook and reheat menus as preset options, not as automatic proof of a food sensor. If sensor adjustment is required, compare against an exact model whose source specifically confirms a cooking sensor. If you prefer selecting time, level, and stage yourself, the Sharp manual also explains its manual operation controls.
Counter placement and clearance deserve a tape measure
Sharp's manual gives counter-location guidance and asks for at least two inches of airflow space at the sides, top, and rear. AJ Madison classifies R315JS as a countertop unit and lists no optional built-in trim kit. Its detailed specifications give a 20 1/2-inch width and 12 1/4-inch height, but the reported depth differs between the page's quick and detailed fields; Sharp's manual specifies 17 5/8 inches. Because the exact depth is not consistent across these records, this profile does not treat one number as definitive. Measure the model revision being offered and preserve the required ventilation clearance before deciding whether it fits a shelf or counter. A countertop installation listing also should not be read as cabinet or trim-kit approval.
Household positioning, not commercial service duty
Sharp describes the R-315J as a Home Use Carousel Microwave Oven in its warranty and service information. The manual also states that the appliance is designed for food preparation and is not designed for industrial or laboratory use. Together, these statements support a household classification, not a claim of foodservice certification. The word “Carousel” refers to its turntable-based design, not to commercial-duty construction. A shared kitchen operator should check with the manufacturer for equipment rated for that environment rather than assuming that a 1,200 W output figure implies restaurant suitability. For household comparison, its turntable, capacity, control options, and silver suffix are the more relevant documented distinctions.
What else to compare
The Sharp R-220KW is a smaller 0.8-cu.-ft. home-use model with 800 W output and a 10.75-inch turntable. LG LCS1114SB is 1.1 cu. ft. with 1,000 W and a 12-inch tray, while Galanz GLCMKZ11GNR10 offers 1.1 cu. ft., 1,000 W, and a 12.4-inch turntable in Surf Green. R-315JS has the largest turntable of those examples and more named cook/reheat/defrost settings than the compact Sharp, but the records do not establish sensor cooking or a trim-kit route.
Before you buy
What finish does the R-315JS suffix identify?
Sharp's manual says the R-315J letter identifies color and S means silver; the exact R315JS listing describes stainless-steel door trim.
Does R-315JS have sensor cooking or a trim kit?
The exact R315JS specification listing says no sensor-cooking setting and no optional built-in trim kit. The manual does not add either feature.
How much output and turntable diameter are documented?
Sharp lists 1,200 W IEC microwave output and a 12 5/8-inch turntable. The manual gives 1,680 W electrical input separately from output.
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-315J microwave oven operation manual ↗ — checked October 4, 2026.
- Sharp R-315J operation manual ↗ — checked October 4, 2026.
- AJ Madison Sharp R315JS exact-model specifications ↗ — checked October 4, 2026.
The decision
Choose Sharp R-315JS if its silver finish, 1.2-cu.-ft. cavity, 1,200 W IEC output, 12 5/8-inch turntable, and named Auto-Touch options match your requirements. Confirm the exact S suffix and resolve the conflicting exterior depth before purchase; do not expect sensor cooking or a built-in trim-kit option from these sources.
Is it the right fit?
Check the exact model and today’s offers on Amazon.