TN23/14/7-4C65

_**FERROXCUBE**_ 

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DATA SHEET<br>TN23/14/7<br>Ferrite toroids<br>Supersedes data of September 2004 2008 Sep 01<br>**----- End of picture text -----**<br>


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Ferroxcube 

TN23/14/7 

## Ferrite toroids 

## **RING CORES (TOROIDS)** 

## **Effective core parameters** 

|**SYMBOL**|**PARAMETER**|**VALUE**|**UNIT**|
|---|---|---|---|
|Σ(I/A)|core factor (C1)|1.81|mm−1|
|Ve|effective volume|1722|mm3|
|Ie|effective length|55.8|mm|
|Ae|effective area|30.9|mm2|
|m|mass of core|≈8.4|g|



## **Coating** 

The cores are coated with polyamide 11 (PA11), flame retardant in accordance with _“UL 94V-2”_ ; UL file number E 45228 (M). 

The colour is white. 

Maximum operating temperature is 160 °C. 

## **Isolation voltage** 

DC isolation voltage: 2000 V. 

Contacts are applied on the edge of the ring core, which is also the critical point for the winding operation. 

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R<br>i<br>23.7 ±0.7<br>handbook, halfpage n<br>g<br>c<br>o<br>r<br>e<br>13.1 ±0.6<br>d<br>a<br>(≈0.3) coating PA11<br>t<br>���� a<br> 7.5<br>±0.45<br>����<br>CBW307<br>Dimensions in mm.<br>Fig.1  TN23/14/7 ring core.<br>**----- End of picture text -----**<br>


|**GRADE**|**AL**<br>**(nH)**|µ**i**|**TYPE NUMBER**|
|---|---|---|---|
|4C65|87±25%|≈125|TN23/14/7-4C65|
|4A11|486±25%|≈700(1)|TN23/14/7-4A11|
|3R1(2)|−|≈800|TN23/14/7-3R1|
|3F3|1250±25%|≈1800|TN23/14/7-3F3|
|3C90|1600±25%|≈2300|TN23/14/7-3C90|
|3C11|3000±25%|≈4300|TN23/14/7-3C11|
|3E25|3820±25%|≈5500|TN23/14/7-3E25|



1. Old permeability specification maintained. 

2. Due to the rectangular BH-loop of 3R1, inductance values strongly depend on the magnetic state of the ring core and measuring conditions. Therefore no AL value is specified. For the application in magnetic amplifiers AL is not a critical parameter. 

## **WARNING** 

Do not use 3R1 cores close to their mechanical resonant frequency. For more information refer to _“3R1”_ material specification in this data handbook. 

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Ferroxcube 

## Ferrite toroids 

## TN23/14/7 

**Properties of cores under power conditions** 

|**GRADE**|**B (mT) 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 = 400 kHz;**<br>**= 50 mT;**<br>**T = 100**°**C**<br>**B**ˆ|
|3C90|≥320|≤0.19|≤0.19||
|3F3|≥320||≤0.19|≤0.33|



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Ferrite toroids 

## **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.|



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