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Description
EPCOS B66311G0000X187 Transformer Cores, Half Core, E, EF20, N87, B66311, 46.3 mm, 31.9 mm�The B66311GX187 is an EF20 type Transformer Ferrite Core with N87 material grade. It has ungapped construction. The magnetic properties of NiZn materials can change irreversible in high magnetic fields. Meets IEC 61246 standards. 1470 +30 20% Inductance factor Applications Industrial Product details Ae Effective Cross Section Area 31. 9mm Effective Magnetic Path Length 46. 3mm Core Material Grade N87 Core Type E Product Range EF Series For Use With
The B66311GX187 is an EF20-type Transformer Ferrite Core with N87 material grade. It has ungapped construction. The magnetic properties of NiZn materials can change irreversible in high magnetic fields. Meets IEC 61246 standards.
- 1470 +30/-20% Inductance factor
Applications
Industrial
Product details
| Ae Effective Cross Section Area | 31.9mm� |
| Effective Magnetic Path Length | 46.3mm |
| Core Material Grade | N87 |
| Core Type | E |
| Product Range | EF Series |
| For Use With | B66311 |
| Inductance Factor Al | 1.4�H |
| Core Size | EF20 |
Other details
| Brand | EPCOS |
| Part Number | B66311G0000X187 |
| Quantity | Each |
| Technical Data Sheet EN | |
| Product Change Notice EN |
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4.6 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 4
Nice warmer.
Color: Black
This thing gets hot! I've had one incident with it. It was on without anything showing on the LED panel. Went to move it and got an unpleasant surprise... Sorry, but one star off for that. Other than this incident it works just fine. Keeps my mug of whatever warm or hot as I select. Recommend it. I'm sure the incident I suffered was a fluke.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Daily Must-Have for Working at Home!
Color: Black
The KitchekShop Coffee Warmer is an item I use daily. I had an old warmer that had a switch on it and the light burnt out. I would always forget to turn it off and sometimes it would be on overnight while I slept or when I left my home office. Yikes! Fire hazard, right?!
So I purchased this one and I love it. You can see a little review I made. This has a display to show the temperature setting on it while it's on.
It has a power button, a timer button for up to 12 hours, and a temperature button. The timer is awesome because I can set it anywhere between 1-12 hours to automatically shut off and not worry about it. I usually set it for the time I KNOW I will be leaving my office so I can't forget about it. I also love the 4 temperature settings. I typically keep it at the second setting of 145 F which is the perfect temp for me. Sometimes, if I am bringing on a beverage that already started to cool a bit, I will bring the temp up to 167 F or 185 F to get it warmer faster, then set it back at 145 F. And once in awhile, if I only have a little bit of beverage left, I will be it at the lowest temp of 131 F so that it's not scalding hot when I drink it.
It doesn't take up a lot of space and it's best used with mugs that have a flat bottom. If you have a concave bottom mug, the heat doesn't distribut as evenly on the mug and it won't heat as quickly and evenly. This is no fault of the product, it's science.
I will say that I had an issue with the first warmer I purchased. It was not heating up as it should. Customer service was phenomenal and sent me a replacement and the replacement has been perfect. Even if this one goes out, I would continue replacing it because of the functionality, appearance, and quality.
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Reviewed in the United States on January 12, 2026
★★★★★ 5
LOVE IT!! No more lukewarm coffee!!
Color: Black
I have a glass coffee mug with a slight ridge on the bottom so I wasn't sure if this would work with my mug.
It did wonderfully! I found that the lower temp. is too low for how hot I like my coffee, but the next one was a bit too high,
HOWEVER, it was drinkable I just have to blow on it a little. But, even if I forget, it's NOT TOO hot to where it hurts.
It's VERY easy to use, and I'm old, hahaha
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Keeps my coffee to temperature
Color: Black
it works great at keeping your hot drinks hot, unfortunately you have to remember to turn off once you are needing to step away or leave for the day as it will not turn off on its own until about 8 hours later, drying the coffee or drink and leaving a dry paste in bottom of cup.
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Reviewed in the United States on May 4, 2026
★★★★★ 5
it keeps my tea hot for as long as I want it
Color: Black
I really like the cute design of this mug warmer. I bought two so my husband and I can use them at the same time. My larger mugs fit perfectly on it. The four temperature settings, timer, and auto shut-off feature are all very useful. Now I can take my time and truly enjoy my tea.
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Reviewed in the United States on May 6, 2026