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Description
FERROXCUBE RM12/I-3C90 Transformer Cores, RM12/I, 3C90, 56.6 mm, 146 mm�The RM series Transformer Core designed for use in high Q, high stability filters inductors. Its shape allows economic utilization of surface area on the PCB. The range is standardized in IEC 431 and is available worldwide from many suppliers. The sizes are based on the standard PCB grid distance. RM 5, for instance, fits on a board space of 5 x 5 modules of 2. 5mm grid. Coil formers and clips were optimized for automated winding and mounting. The
The RM series Transformer Core designed for use in high Q, high stability filters inductors. Its shape allows economic utilization of surface area on the PCB. The range is standardized in IEC 431 and is available worldwide from many suppliers. The sizes are based on the standard PCB grid distance. RM 5, for instance, fits on a board space of 5 x 5 modules of 2.5mm grid. Coil formers and clips were optimized for automated winding and mounting. The slots provide sufficient space for leads of windings. Magnetic shielding is not as good as with P-core, but still effective. For applications other than filter inductors the centre hole in the RM core is not necessary. Inductance adjustment is generally not required. For wideband and power transformers core performance can be improved by using a solid centre pole. AL-values will be higher and less flux concentrations occur in the core because its cross section has become more uniform.
- Standardized range
- Complete range of accessories
- Easy for automated winding
- Simple assembly and mounting system
- Efficient utilization of PCB area
- Wider slots to get leads out
- Good magnetic shielding
- Good selection of coil formers
- Small winding area
Applications
Industrial, Power Management
Product details
| Ae Effective Cross Section Area | 146mm� |
| Effective Magnetic Path Length | 56.6mm |
| Core Material Grade | 3C90 |
| Core Type | - |
| Product Range | RM Series |
| For Use With | - |
| Inductance Factor Al | 5.6�H |
| Core Size | RM12/I |
Other details
| Brand | FERROXCUBE |
| Part Number | RM12/I-3C90 |
| Quantity | 1 Pair |
| Technical Data Sheet EN |
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4.2 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Looks nice, easy to install
Color: Rustic Brown, Number Of Shelves: 2, Size: 22in
This shelf is lightweight, looks nice, and was easy to install. It comes with a little level to help you install it properly. There are plenty of mounting holes to choose from, so it is easy to screw it directly into a stud, or to just use holes that are convenient for you. It comes with a plethora of mounting hardware.
I mounted mine a bit high up and chose to mount it upside down so that I wouldn't see the three screws that hold the shelf to the mounting bracket.
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Reviewed in the United States on April 8, 2026
★★★★★ 5
Great shelf
Color: Rustic Brown, Size: 31.5 Inch, Color: Rustic Brown, Size: 31.5 Inch
For someone who has ZERO counter space and a ton of empty wall space, this is PERFECT!
The install was easier then expected (if I installed it right because I’m just a girl) but very eye appealing, great for storage and decoration, great deal for the price!
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Looks great in my window
Color: Rustic Brown, Size: 31.5 Inch, Color: Rustic Brown, Size: 31.5 Inch
Fits pretty well, had to slightly put it in an angle for it to fit on the frame of the window, overall easy to put together and looks great
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Wall shelf
Color: Rustic Brown, Size: 31.5 Inch, Color: Rustic Brown, Size: 31.5 Inch
Nice shelf. Easy to assemble.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Nice and sturdy
Very easy to assemble and sturdy. Exactly what we were looking for.
The only complaint is that the anchors that came with it did not work properly, we used our own.
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Reviewed in the United States on November 23, 2025