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RM8/I-3C90
Transformer Cores, RM/I, RM8/I, 3C90, 38.4 mm, 63 mm²
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: FERROXCUBE
- Product type: Transformer Cores
- Core Type:RM/I; Core Size:RM8/I; Core Material Grade:3C90; For Use With:-; Effective Magnetic Path Length:38.4mm; Ae Effective Cross Section Area:63mm²; Inductance Factor Al:3.3µH; Product Range
- Core Size: RM8/I
- Core Type: RM/I
- For Use With: -
- Product Range: -
- Core Material Grade: 3C90
- Inductance Factor Al: 3.3µH
- Effective Magnetic Path Length: 38.4mm
- Ae Effective Cross Section Area: 63mm²
| Delivery and price | |
|---|---|
| Units per pack | 800 |
| Price | 0.86 € |
| Current stock | 500+ |
| Lead time | 30 days |
Datasheet
## _**FERROXCUBE**_ **RM8/I** RM, RM/I, RM/ILP cores and accessories Supersedes data of September 2004 2008 Sep 01 **==> picture [347 x 67] intentionally omitted <==** Ferroxcube ## RM, RM/I, RM/ILP cores and accessories ## RM8/I ## **CORE SETS** ## **Effective core parameters** |**SYMBOL**|**PARAMETER**|**VALUE**|**UNIT**| |---|---|---|---| |Σ(I/A)|core factor (C1)|0.604|mm−1| |Ve|effective volume|2440|mm3| |Ie|effective length|38.4|mm| |Ae|effective area|63.0|mm2| |Amin|minimum area|55.4|mm2| |m|mass of set|≈13|g| **==> picture [242 x 291] intentionally omitted <==** **----- Start of picture text -----**<br> handbook, halfpage 0<br>19.7 0.8<br>0 5.1<br>11 0.5 ± 0.1<br>9.5<br>0<br>23.2<br>0.9<br>O 8.55 [0]<br>0.3<br>14.3 0.4 16.4<br>10.8<br> 0.25 0 0.1<br>0.6 MGC068<br>O 17<br>0<br>Dimensions in mm.<br>Fig.1 RM8/I core set.<br>**----- End of picture text -----**<br> ## **Core sets for filter applications** Clamping force for AL measurements, 30 ±10 N. |**GRADE**|**AL**<br>**(nH)**|µ**e**|**AIR GAP**<br>**(**µ**m)**|**TYPE NUMBER**| |---|---|---|---|---| |3B46|5200±25 %|≈2500|≈0|RM8/I-3B46| |3D3|250±3%|≈121|≈360|RM8/I-3D3-A250| ||315±5%|≈153|≈270|RM8/I-3D3-A315| ||400±5%|≈194|≈200|RM8/I-3D3-A400| ||1400±25%|≈675|≈0|RM8/I-3D3| |3H3|400±3%|≈194|≈200|RM8/I-3H3-A400| ||630±5%|≈306|≈115|RM8/I-3H3-A630| ||1000±10%|≈485|≈65|RM8/I-3H3-A1000| ||3250±25%|≈1560|≈0|RM8/I-3H3| 2008 Sep 01 2 Ferroxcube ## RM, RM/I, RM/ILP cores and accessories ## RM8/I **Core sets for general purpose transformers and power applications** Clamping force for AL measurements, 30 ±10 N. |**GRADE**|**AL**<br>**(nH)**|µ**e**|**TOTAL AIR GAP**<br>**(**µ**m)**|**TYPE NUMBER**| |---|---|---|---|---| |3C81|100±3%|≈49|≈1100|RM8/I-3C81-E100| ||160±3%|≈78|≈610|RM8/I-3C81-A160| ||250±3%|≈121|≈360|RM8/I-3C81-A250| ||315±3%|≈153|≈270|RM8/I-3C81-A315| ||400±3%|≈194|≈200|RM8/I-3C81-A400| ||4100±25%|≈1990|≈0|RM8/I-3C81| |3C90|100±3%|≈49|≈1100|RM8/I-3C90-A100| ||160±3%|≈78|≈610|RM8/I-3C90-A160| ||250±3%|≈121|≈360|RM8/I-3C90-A250| ||315±3%|≈153|≈270|RM8/I-3C90-A315| ||400±3%|≈194|≈200|RM8/I-3C90-A400| ||3300±25%|≈1600|≈0|RM8/I-3C90| |3C91|4100±25%|≈1990|≈0|RM8/I-3C91| |3C94|100±3%|≈49|≈1100|RM8/I-3C94-A100| ||160±3%|≈78|≈610|RM8/I-3C94-A160| ||250±3%|≈121|≈360|RM8/I-3C94-A250| ||315±3%|≈153|≈270|RM8/I-3C94-A315| ||400±3%|≈194|≈200|RM8/I-3C94-A400| ||3300±25%|≈1600|≈0|RM8/I-3C94| |3C95|4100±25%|≈1990|≈0|RM8/I-3C95| |3C96|3000±25%|≈1440|≈0|RM8/I-3C96| |3F3|100±3%|≈49|≈1100|RM8/I-3F3-A100| ||160±3%|≈78|≈610|RM8/I-3F3-A160| ||250±3%|≈121|≈360|RM8/I-3F3-A250| ||315±3%|≈153|≈270|RM8/I-3F3-A315| ||400±3%|≈194|≈200|RM8/I-3F3-A400| ||3000±25%|≈1440|≈0|RM8/I-3F3| |3F35|2400±25%|≈1150|≈0|RM8/I-3F35| |3F4|100±3%|≈49|≈1100|RM8/I-3F4-A100| ||160±3%|≈78|≈610|RM8/I-3F4-A160| ||250±3%|≈121|≈360|RM8/I-3F4-A250| ||315±3%|≈153|≈270|RM8/I-3F4-A315| ||400±3%|≈194|≈200|RM8/I-3F4-A400| ||1700±25%|≈820|≈0|RM8/I-3F4| |3F45|1700±25%|≈820|≈0|RM8/I-3F45| 2008 Sep 01 3 Ferroxcube ## RM, RM/I, RM/ILP cores and accessories ## RM8/I ## **Core sets of high permeability grades** Clamping force for AL measurements, 30 ±10 N. |Clamping for|ce for ALmeasurements, 30±10 N.||| |---|---|---|---| |**GRADE**|**AL**<br>**(nH)**|µ**e**|**TYPE NUMBER**| |3E27|8000±25%|≈3880|RM8/I-3E27| |3E5|12500 +40/−30%|≈6060|RM8/I-3E5| |3E6|15500 +40/−30%|≈7520|RM8/I-3E6| ## **Properties of core sets under power conditions** |**GRADE**|**B (mT) at**|**CORE LOSS (W) at**|**CORE LOSS (W) at**|**CORE LOSS (W) at**|**CORE LOSS (W) at**|**CORE LOSS (W) at**| |---|---|---|---|---|---|---| ||**H = 250 A/m;**<br>**f = 25 kHz;**<br>**T = 100**°**C**|**f = 25 kHz;**<br>**= 200 mT;**<br>**T = 100**°**C**<br>**B**ˆ|**f = 100 kHz;**<br>**= 100 mT;**<br>**T = 100** °**C**<br>**B**ˆ|**f = 100 kHz;**<br>**= 200 mT;**<br>**T = 25**°**C**<br>**B**ˆ|**f = 100 kHz;**<br>**= 200 mT;**<br>**T = 100**°**C**<br>**B**ˆ|**f = 400 kHz;**<br>**= 50 mT;**<br>**T = 100** °**C**<br>**B**ˆ| |3C81|≥315|≤0.56|−|−|−|−| |3C90|≥320|≤0.30|≤0.31|−|−|−| |3C91|≥315|−|≤0.17(1)|−|≤1.01)|−| |3C94|≥320|−|≤0.23|−|≤1.2|−| |3C95|≥320|−|−|≤1.44|≤1.37|−| |3C96|≥340|−|≤0.17|−|≤1.0|≤0.43| |3F3|≥315|−|≤0.27|−|−|≤0.47| |3F35|≥315|−|−|−|−|≤0.25| |3F4|≥250|−|−|−|−|−| ## **Properties of core sets under power conditions (continued)** |**GRADE**|**B (mT) at**|**CORE LOSS (W) at**|**CORE LOSS (W) at**|**CORE LOSS (W) at**|**CORE LOSS (W) at**|**CORE LOSS (W) at**| |---|---|---|---|---|---|---| ||**H = 250 A/m;**<br>**f = 25 kHz;**<br>**T = 100**°**C**|**f = 500 kHz;**<br>**= 50 mT;**<br>**T = 100**°**C**<br>**B**ˆ|**f = 500 kHz;**<br>**= 100 mT;**<br>**T = 100** °**C**<br>**B**ˆ|**f = 1 MHz;**<br>**= 30 mT;**<br>**T = 100**°**C**<br>**B**ˆ|**f = 1 MHz;**<br>**= 50 mT;**<br>**T = 100**°**C**<br>**B**ˆ|**f = 3 MHz;**<br>**= 10 mT;**<br>**T = 100** °**C**<br>**B**ˆ| |3C96|≥340|≤0.9|−|−|−|−| |3F3|≥315|−|−|−|−|−| |3F35|≥315|≤0.37|≤2.6|−|−|−| |3F4|≥250|−|−|≤0.74|−|≤1.2| |3F45|≥250|−|−|≤0.56|≤2.1|≤1.0| ## **Note** 1. Measured at 60 °C. 2008 Sep 01 4 Ferroxcube ## RM, RM/I, RM/ILP cores and accessories ## RM8/I ## **COIL FORMER** ## **General data** |**PARAMETER**|**SPECIFICATION**| |---|---| |Coil former material|polybutyleneterephthalate (PBT), glass-reinforced, flame retardant<br>in accordance with_“UL 94V-0”_; UL file number E45329(R)| |Pin material|copper-tin alloy(CuSn), tin (Sn) plated| |Maximum operatingtemperature|155°C,_“IEC 60085”_, class F| |Resistance to solderingheat|_“IEC 60068-2-20”_, Part 2, Test Tb, method 1B, 350°C, 3.5 s| |Solderability|_“IEC 60068-2-20”_, Part 2, Test Ta, method 1| **==> picture [497 x 280] intentionally omitted <==** **----- Start of picture text -----**<br> 10.6 −0.15 [0 ]<br>3.1<br>5.08 (8.6 min.)<br>3.81 3.81 0.65 1.1 2.54<br>3.81 3.81 2.5 0.3<br>handbook, full pagewidth<br>20.32 8.7 [+][0.2] 0 16 23.4 ∅16.9 −0.2 [0 ] ∅9.95 −0.1 [0 ]<br>∅0.6<br>3.2<br>CBW524<br>23.3 4.3 1 [+][0.15]<br>0<br>Dimensions in mm.<br>Fig.2 RM8/I coil former (DIL).<br>**----- End of picture text -----**<br> ## **Winding data and area product for RM8/I coil former (DIL)** |**NUMBER OF**<br>**SECTIONS**|**AVERAGE**<br>**LENGTH OF**<br>**TURN**<br>**(mm)**|**WINDING**<br>**AREA**<br>**(mm2)**|**WINDING**<br>**WIDTH**<br>**(mm)**|**AREA**<br>**PRODUCT**<br>**Ae x Aw**<br>**(mm4)**|**TYPE NUMBER**| |---|---|---|---|---|---| |1|42|30.9|8.6|1950|CPV-RM8/I-1S-12PD| 2008 Sep 01 5 Ferroxcube ## RM, RM/I, RM/ILP cores and accessories ## RM8/I Additional coilformers are those of _“RM8”_ , but _“area product”_ is different. ## **Winding data and area product (for RM8/I) for RM8 coil former** |**NUMBER**<br>**OF**<br>**SECTIONS**|**NUMBER**<br>**OF**<br>**PINS**|**PIN**<br>**POSITIONS**<br>**USED**|**AVERAGE**<br>**LENGTH**<br>**OF TURN**<br>**(mm)**|**WINDING**<br>**AREA**<br>**(mm2)**|**WINDING**<br>**WIDTH**<br>**(mm)**|**AREA**<br>**PRODUCT**<br>**Ae x Aw**<br>**(mm4)**|**TYPE NUMBER**| |---|---|---|---|---|---|---|---| |1|8|1, 2, 5, 6, 7,<br>8, 11, 12|42|30|9.1|1890|CSV-RM8-1S-8P-G(1)| |1|12|all|42|30|9.1|1890|CSV-RM8-1S-12P-G(1)| |2|8|1, 2, 5, 6, 7,<br>8, 11, 12|42|2×13.5|2×4.3|2 x 850|CSV-RM8-2S-8P| |2|12|all|42|2×13.5|2×4.3|2 x 850|CSV-RM8-2S-12P-G| |1|4|3, 4, 9, 10|42|30|9.1|1890|CSV-RM8-1S-4P| |1|5|1, 2, 5, 8, 11|42|30|9.1|1890|CSV-RM8-1S-5P| |2|5|1, 2, 5, 8, 11|42|2×13.5|2×4.3|2 x 850|CSV-RM8-2S-5P| **Note** 1. Also available with post-inserted pins. 2008 Sep 01 6 Ferroxcube ## RM, RM/I, RM/ILP cores and accessories ## RM8/I ## **MOUNTING PARTS** ## **General data** |**General data**|| |---|---| |**ITEM**|**SPECIFICATION**| |Clampingforce|≈15 N| |Clip material|stainless steel| |Clip plating|tin (Sn)| |Solderability|_“IEC 60068-2-20”_,<br>Part 2, Test Ta, method 1| |Type number|CLI/P-RM8/I| **==> picture [244 x 306] intentionally omitted <==** **----- Start of picture text -----**<br> 4.5<br>olumns<br>15.5 13.3<br>R 40<br>4.8<br>CBW523<br>0.7<br>Dimensions in mm.<br>Fig.3 Mounting clip with earth pin for RM8/I.<br>**----- End of picture text -----**<br> ## **General data** |**General data**|| |---|---| |**ITEM**|**SPECIFICATION**| |Clampingforce|≈15 N| |Clip material|stainless steel| |Type number|CLI-RM8/I| **==> picture [244 x 305] intentionally omitted <==** **----- Start of picture text -----**<br> 4.5<br>olumns<br>15.5 13.3<br>R 40<br>CBW522<br>Dimensions in mm.<br>Fig.4 Mounting clip without earth pin for RM8/I.<br>**----- End of picture text -----**<br> 2008 Sep 01 7 Ferroxcube RM, RM/I, RM/ILP cores and accessories ## RM8/I ## **DATA SHEET STATUS DEFINITIONS** |**DATA SHEET**<br>**STATUS**|**PRODUCT**<br>**STATUS**|**DEFINITIONS**| |---|---|---| |Preliminary<br>specification|Development|This data sheet contains preliminary data. Ferroxcube reserves the right to<br>make changes at any time without notice in order to improve design and<br>supplythe best possible product.| |Product specification|Production|This data sheet contains final specifications. Ferroxcube reserves the right<br>to make changes at any time without notice in order to improve design and<br>supplythe best possible product.| ## **DISCLAIMER** **Life support applications** These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Ferroxcube customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Ferroxcube for any damages resulting from such application. ## **PRODUCT STATUS DEFINITIONS** |**STATUS**|**INDICATION**|**DEFINITION**| |---|---|---| |**Prototype**||These are products that have been made as development samples for the purposes of<br>technical evaluation only. The data for these types is provisional and is subject to<br>change.| |**Design-in**||These products are recommended for new designs.| |**Preferred**||These products are recommended for use in current designs and are available via our<br>sales channels.| |**Support**||These products are**not**recommended for new designs and may not be available<br>through all of our sales channels. Customers are advised to check for availability.| 2008 Sep 01 8
Updated at April 28, 2026
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