If you’ve spent any time shopping for a mid-sized microwave, you’ve likely stared at the Panasonic NN-SN686S and the NN-SU696S and wondered why two appliances from the same brand, with nearly identical footprints, have such a price and power discrepancy.
I’ve put both of these units through a “stress test” in my own kitchen – moving beyond simple reheating to see how they handle delicate tasks like tempering chocolate and defrosting thick proteins. The results confirmed a suspicion I’ve had for a while: these two machines are designed for completely different philosophies of cooking. One is a high-speed precision tool; the other is a reliable, high-volume workhorse.
The Key Difference: Panasonic NN-SN686S vs NN-SU696S Microwave Oven
The fundamental divide here isn’t just the 100-watt difference in power; it’s the delivery method.
- The Panasonic NN-SN686S (Linear Inverter): This unit uses Inverter Technology. Instead of the “on-and-off” pulsing you hear in standard microwaves, this machine provides a constant, steady stream of heat at lower power levels. If you set it to 50%, it stays at 50%.
- The Panasonic NN-SU696S (Cyclical Power): This is a traditional high-power microwave. It achieves lower power settings by “duty cycling” – blasting 100% power for a few seconds, then zero power, then 100% again. It also offers a slightly larger 3 cubic foot interior, prioritizing space over the sophisticated power logic.
Technical Comparison Table: Panasonic NN-SN686S vs NN-SU696S Microwave Oven
| Metric | Panasonic NN-SN686S | Panasonic NN-SU696S |
| Peak Power | 1200 Watts | 1100 Watts |
| Cooking Logic | Inverter (Steady Stream) | Conventional (Pulsed) |
| Internal Volume | 1.2 cu. ft. | 1.3 cu. ft. |
| Sensor Tech | Genius Sensor (Multi-point) | Standard Sensor (Single) |
| Defrost Mode | Inverter Turbo Defrost | Auto Defrost |
| Preset Menus | 14 Dedicated Programs | 7 Dedicated Programs |
| Footprint (Depth) | 15.8 Inches | 16.6 Inches |
| Turntable Size | 13.4 Inches | 13.4 Inches |
| Check Latest Deals on Amazon | Buy on Amazon |
Detailed Comparative Review: My Kitchen Diary
Design: Sleek Integration vs. Roomy Practicality
When I first unboxed the NN-SN686S, I noticed it felt remarkably “dense.” Because the Inverter components are smaller and lighter than traditional transformers, Panasonic was able to make the external shell tighter while keeping a large 13.4-inch turntable. It fits deeper into my cabinetry and looks more like a built-in unit.
The NN-SU696S, meanwhile, is for the cook who needs that extra “headroom.” That 1.3 cu. ft. capacity feels significantly roomier when you’re trying to fit a tall lidded casserole dish. It is a bit deeper, sitting closer to the edge of a standard countertop, but it feels incredibly sturdy. If you have a large family and are constantly reheating big batches, that extra volume in the SU696S is a tangible benefit.
- Panasonic Microwave: This 1100-Watt high power, 1.3-cubic-foot capacity stainless steel countertop/built-in microwave delivers a...
- Turbo Defrost: This technology generates a seamless stream of power and delivers consistent, evenly prepared food without overcooking;...
Ease of Use: The “One-Touch” Reality
I am a heavy user of the Quick 30 and Popcorn buttons.
- The NN-SU696S actually wins on the snack front. Its popcorn button has three distinct levels based on bag size. I found it popped almost every kernel without burning the center – a rarity for a non-inverter model.
- The NN-SN686S is built for the more “active” cook. The membrane keypad features 14 presets, including specific settings for quinoa and omelets. I found the UI on the SN686S to be more responsive, and the “Keep Warm” feature is a lifesaver when I’m finishing a main course on the stove and need the sides to stay at exactly 140°F.
Functions: The Defrosting Showdown
This is where my experience diverged. I used both to defrost two identical 1lb packages of frozen ground beef.
In the NN-SN686S, the Turbo Defrost lived up to its name. Because the Inverter doesn’t “blast” the meat with full power, the beef thawed evenly without those gray, cooked edges.
In the NN-SU696S, the defrosting was “fine,” but I had to flip the meat twice as often to avoid the microwave actually cooking the corners of the block while the center remained a brick of ice. If you frequently forget to take meat out of the freezer for dinner, the SN686S will save your sanity.
Maintenance: Stainless Steel and Smooth Surfaces
Both units feature the classic Panasonic stainless steel finish. It’s beautiful, but you will keep a microfiber cloth nearby for fingerprints.
One thing I noticed: the NN-SN686S is lighter. When I went to wipe down the counter underneath it, it was much easier to shift. The NN-SU696S has a more traditional weight to it, which makes it feel “planted,” but requires a bit more muscle to move during deep cleaning. Both interiors have an easy-clean coating that handled a “taco night” salsa explosion with just a soapy sponge.
Panasonic NN-SN686S (The Precision Choice) Microwave Oven
Pros:
- Superior Texture: Inverter tech prevents “rubbery” chicken and “lava” centers in frozen meals.
- High Power: 1200W boils water and heats soups faster than standard units.
- Genius Sensor: Very accurate – it knows exactly when your oatmeal is done before it boils over.
- Compact Footprint: Thinner electronics mean more counter space for you.
Cons:
- Price: You are paying a premium for the Inverter circuitry.
- Capacity:2 cu. ft. is generous, but may feel tight for the largest casserole dishes.
Panasonic NN-SU696S (The Volume Choice) Microwave Oven
- Panasonic Microwave: This 1100-Watt high power, 1.3-cubic-foot capacity stainless steel countertop/built-in microwave delivers a...
- Turbo Defrost: This technology generates a seamless stream of power and delivers consistent, evenly prepared food without overcooking;...
Pros:
- More Space:3 cu. ft. handles oversized dinnerware and large family portions.
- Popcorn Master: Dedicated buttons for different bag sizes.
- User Friendly: A simpler interface that is easier for kids or guests to navigate.
- Value: Generally more affordable for the amount of interior space you get.
Cons:
- Uneven Defrost: Conventional pulsing can slightly “cook” the edges of frozen foods.
- Deeper Profile: Requires a bit more counter depth than its Inverter sibling.
Conclusion & My Recommendation
Choosing between these two comes down to whether you use your microwave as a reheating box or a cooking tool.
I recommend the Panasonic NN-SU696S if:
Your kitchen is a high-traffic zone for snacks and simple reheats. If your main priority is fitting a big plate of leftovers or making the perfect bag of popcorn without a complex setup, this is the most cost-effective and spacious option. It’s a reliable, heavy-duty workhorse that won’t let you down.
I recommend the Panasonic NN-SN686S if:
You value food quality over raw volume. If you use your microwave to thaw ingredients for dinner, soften butter, or cook delicate proteins, the Inverter technology is a massive upgrade. It behaves more like a “miniature oven” than a traditional microwave.
My Personal Choice: I would go with the NN-SN686S. As someone who often cooks from “nearly frozen,” the Inverter Turbo Defrost is a feature I use daily. The 1200W of power means my morning coffee is hot 15 seconds faster, and in a busy kitchen, those seconds add up.
Frequently Asked Questions
Does the Inverter really make a difference for reheating pizza?
Yes. A standard microwave (SU696S) often turns the crust into leather because of the high-power pulses. The SN686S on a lower power setting keeps the crust much more pliable while still melting the cheese.
Can I build the NN-SU696S into my wall?
While it is a countertop model, Panasonic does not officially market a trim kit for the SU696S like they do for the SN686S. If you want a seamless “built-in” look, stick with the SN686S.
How much louder is the 1200W model?
Surprisingly, it isn’t. The Inverter technology actually makes for a smoother, less “clunky” sound during operation compared to the heavy transformer used in the 1100W SU696S.
Is the “Genius Sensor” just marketing?
Not quite. On the SN686S, the sensor measures the steam emitted from the food and calculates the remaining time. I’ve found it remarkably accurate for potatoes and fresh vegetables, whereas standard sensors are a bit more hit-or-miss.
Which one is better for a small apartment?
The NN-SN686S is about an inch shallower than the SU696S. If you have narrow counters or a crowded kitchen, that extra inch makes a huge difference in how the kitchen feels.
