B66414B2000X000 - EPCOS - Product.Network

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Ferrites and accessories

EFD 15/8/5

Core and accessories

Series/Type: B66413, B66414

Date: June 2019

26/19

Please read Cautions and warnings and

Important notes at the end of this document.

■E core with flattened, lower center leg

for especially flat transformer design

■For DC/DC converters

■Delivery mode: single units

Magnetic characteristics (per set)

6l/A = 2.27 mm–1

le= 34 mm

Ae= 15 mm2

Amin = 12.2 mm2

Ve= 510 mm3

Approx. weight 2.8 g/set

Ungapped

Other AL values/air gaps and materials available on request – see Processing remarks on page 5.

Gapped (AL values/air gaps examples)

The AL value in the table applies to a core set comprising one ungapped core (dimension g = 0 mm)

and one gapped core (dimension g > 0 mm).

Calculation factors (for formulas, see “E cores: general information”)

Validity range: K1, K2: 0.10 mm < s < 1.00 mm

K3, K4: 30 nH < AL < 280 nH

Material AL value

PePV

W/set

Ordering code

N49 600 +30/–20% 1080 < 0.11 ( 50 mT, 500 kHz, 100 °C) B66413G0000X149

N87 780 +30/–20% 1400 < 0.28 (200 mT, 100 kHz, 100 °C) B66413G0000X187

N97 820 +30/–20% 1480 < 0.23 (200 mT, 100 kHz, 100 °C) B66413G0000X197

Material AL value

Peg

approx.

Ordering code

** = 87 (N87)

= 97 (N97)

N87, 50r5% 90 0.46 B66413U0050J1**

N97 100r10% 180 0.17 B66413U0100K1**

125r10% 225 0.12 B66413U0125K1**

160 r15% 288 0.08 B66413U0160L1**

Material Relationship between

air gap – AL value

Calculation of saturation current

K1 (25 °C) K2 (25 °C) K3 (25 °C) K4 (25 °C) K3 (100 °C) K4 (100 °C)

N87 29.7 –0.676 44.2 –0.796 33.2 –0.873

B66413Core

EFD 15/8/5

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Important notes at the end of this document.

Coil former

Material: GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:

F max.operating temperature 155 °C), color code black

Sumikon PM 9630® >E41429 (M)@, SUMITOMO BAKELITE CO LTD

Solderability: to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s

Resistance to soldering heat: to IEC 60068-2-20, test Tb, method 1B: 350 °C, 3.5 s

Winding: see Processing notes, 2.1

Pins: Squared pins

Yoke

Material: Stainless spring steel (0.25 mm)

Coil former Yoke

Coil former Ordering code

Sections AN

mm2

AR value

Pins

1 15.5 35.9 79.7 8 B66414W1008D001

Yoke (ordering code per piece, 2 are required) B66414B2000X000

B66414Accessories

EFD 15/8/5

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Important notes at the end of this document.

SMD coil former with J terminals

Material: GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:

F max. operating temperature 155 °C), color code black

Laperos E 130i >E106764 (M)@, POLYPLASTICS CO LTD

Vectra E 130i >E83005 (M)@, CELANESE INTERNATIONAL CORP.

Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 °C, 3 s

Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 °C, 10 s

permissible soldering temperature for wire-wrap connection on coil former: 400 °C, 1 s

Winding: see Processing notes, 2.1

Yoke

Material: Stainless spring steel (0.25 mm)

Mounting: Preferred assembly direction from the top

Cover plate

For marking and improved processing on assembly machines.

See under coil former for material and resistance to soldering heat.

Material: Sumika Super E4008® >E54705 (M)@, SUMITOMO CHEMICAL CO LTD

Coil former Yoke

Coil former Ordering code

Sections AN

mm2

AR value

Terminals

1 18.1 35.1 66.7 8 B66414B6008T001

Yoke (ordering code per piece, 2 are required) B66414B2000X000

Cover plate B66414A7000X000

Cover plate

B66414Accessories

EFD 15/8/5

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Important notes at the end of this document.

Mechanical stress and mounting

Ferrite cores have to meet mechanical requirements during assembling and for a growing number

of applications. Since ferrites are ceramic materials one has to be aware of the special behavior

under mechanical load.

As valid for any ceramic material, ferrite cores are brittle and sensitive to any shock, fast tempera-

ture changing or tensile load. Especially high cooling rates under ultrasonic cleaning and high static

or cyclic loads can cause cracks or failure of the ferrite cores.

For detailed information see data book, chapter “General - Definitions, 8.1”.

Effects of core combination on AL value

Stresses in the core affect not only the mechanical but also the magnetic properties. It is apparent

that the initial permeability is dependent on the stress state of the core. The higher the stresses are

in the core, the lower is the value for the initial permeability. Thus the embedding medium should

have the greatest possible elasticity.

For detailed information see data book, chapter “General - Definitions, 8.1”.

Heating up

Ferrites can run hot during operation at higher flux densities and higher frequencies.

NiZn-materials

The magnetic properties of NiZn-materials can change irreversible in high magnetic fields.

Ferrite Accessories

Our ferrite accessories have been designed and evaluated only in combination with our ferrite co-

res. We explicitly point out that our ferrite accessories or our ferrite cores may not be compatible

with those of other manufacturers. Any such combination requires prior testing by the customer and

will be at the customer‘s own risk.

We assume no warranty or reliability for the combination of our ferrite accessories with cores and

other accessories from any other manufacturer.

Processing remarks

The start of the winding process should be soft. Else the flanges may be destroyed.

– Too strong winding forces may blast the flanges or squeeze the tube that the cores can not be

mounted any more.

– Too long soldering time at high temperature (>300 °C) may effect coplanarity or pin arrange-

ment.

– Not following the processing notes for soldering of the J-leg terminals may cause solderability

problems at the transformer because of pollution with Sn oxyde of the tin bath or burned insula-

tion of the wire. For detailed information see chapter “Processing notes”, section 2.2.

– The dimensions of the hole arrangement have fixed values and should be understood as

a recommendation for drilling the printed circuit board. For dimensioning the pins, the group

of holes can only be seen under certain conditions, as they fit into the given hole arrangement.

To avoid problems when mounting the transformer, the manufacturing tolerances for positioning

the customers’ drilling process must be considered by increasing the hole diameter.

Cautions and warnings

Ferrites and accessories

Cautions and warnings

66/19

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Important notes at the end of this document.

Ferrites and accessories

Display of ordering codes for TDK Electronics products

The ordering code for one and the same product can be represented differently in data sheets, data

books, other publications, on the company website or in order-related documents such as shipping

notes, order confirmations and product labels. The varying representations of the ordering co-

des are due to different processes employed and do not affect the specifications of the re-

spective products. Detailed information can be found on the Internet under

www.tdk-electronics.tdk.com/orderingcodes.

Cautions and warnings

76/19

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Important notes at the end of this document.

Symbol Meaning Unit

AL1

Amin

BDC

CDF

fcutoff

fmax

fmin

fCu

HDC

h/Pi2

IDC

k3c

Cross section of coil

Effective magnetic cross section

Inductance factor; AL = L/N2

Minimum inductance at defined high saturation ( Pa)

Minimum core cross section

Winding cross section

Resistance factor; AR = RCu/N2

RMS value of magnetic flux density

Flux density deviation

Peak value of magnetic flux density

Peak value of flux density deviation

DC magnetic flux density

Remanent flux density

Saturation magnetization

Winding capacitance

Core distortion factor

Relative disaccommodation coefficient DF = d/Pi

Disaccommodation coefficient

Activation energy

Frequency

Cut-off frequency

Upper frequency limit

Lower frequency limit

Resonance frequency

Copper filling factor

Air gap

RMS value of magnetic field strength

Peak value of magnetic field strength

DC field strength

Coercive field strength

Hysteresis coefficient of material

Relative hysteresis coefficient

RMS value of current

Direct current

Peak value of current

Polarization

Boltzmann constant

Third harmonic distortion

Circuit third harmonic distortion

Inductance

mm2

P: = 10–6:

Vs/m2, mT

F = As/V

mm–4.5

s–1, Hz

A/m

10–6 cm/A

Vs/m2

J/K

H = Vs/A

Symbols and terms

Ferrites and accessories

Symbols and terms

86/19

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Important notes at the end of this document.

Symbol Meaning Unit

'L/L

Lrev

PCu

Ptrans

RCu

'Rh

Rth

tanG

tanGL

tanGr

tanGe

tanGh

tanG/Pi

Relative inductance change

Inductance of coil without core

Main inductance

Parallel inductance

Reversible inductance

Series inductance

Effective magnetic path length

Average length of turn

Number of turns

Copper (winding) losses

Transferrable power

Relative core losses

Performance factor

Quality factor (Q = ZL/Rs = 1/tanGL)

Resistance

Copper (winding) resistance (f = 0)

Hysteresis loss resistance of a core

Rh change

Internal resistance

Parallel loss resistance of a core

Series loss resistance of a core

Thermal resistance

Effective loss resistance of a core

Total air gap

Temperature

Temperature difference

Curie temperature

Time

Pulse duty factor

Loss factor

Loss factor of coil

(Residual) loss factor at H o 0

Relative loss factor

Hysteresis loss factor

Relative loss factor of material at H o 0

RMS value of voltage

Peak value of voltage

Effective magnetic volume

Complex impedance

Normalized impedance |Z|n = |Z| /N2 u H (le/Ae)

mW/g

K/W

°C

mm3

:/mm

Symbols and terms

Ferrites and accessories

96/19

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Important notes at the end of this document.

All dimensions are given in mm.

Surface-mount device

Symbol Meaning Unit

)

Papp

Pp'

Pp"

Ps'

Ps"

Ptot

6l/A

WCu

Temperature coefficient (TK)

Relative temperature coefficient of material

Temperature coefficient of effective permeability

Relative permittivity

Magnetic flux

Efficiency of a transformer

Hysteresis material constant

Hysteresis core constant

Magnetostriction at saturation magnetization

Relative complex permeability

Magnetic field constant

Relative amplitude permeability

Relative apparent permeability

Relative effective permeability

Relative initial permeability

Relative real (inductive) component of P(for parallel components)

Relative imaginary (loss) component of P(for parallel components)

Relative permeability

Relative reversible permeability

Relative real (inductive) component of P(for series components)

Relative imaginary (loss) component of P(for series components)

Relative total permeability

derived from the static magnetization curve

Resistivity

Magnetic form factor

DC time constant WCu = L/RCu = AL/AR

Angular frequency; Z= 2 3f

1/K

mT-1

A–1H–1/2

Vs/Am

:m–1

mm–1

s–1

Symbols and terms

Ferrites and accessories

10 6/19

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Important notes at the end of this document.

The following applies to all products named in this publication:

1. Some parts of this publication contain statements about the suitability of our products for

certain areas of application. These statements are based on our knowledge of typical require-

ments that are often placed on our products in the areas of application concerned. We never-

theless expressly point out that such statements cannot be regarded as binding statements

about the suitability of our products for a particular customer application. As a rule, we

are either unfamiliar with individual customer applications or less familiar with them than the cus-

tomers themselves. For these reasons, it is always ultimately incumbent on the customer to

check and decide whether a product with the properties described in the product specification is

suitable for use in a particular customer application.

2. We also point out that in individual cases, a malfunction of electronic components or fail-

ure before the end of their usual service life cannot be completely ruled out in the current

state of the art, even if they are operated as specified. In customer applications requiring a

very high level of operational safety and especially in customer applications in which the mal-

function or failure of an electronic component could endanger human life or health (e.g. in acci-

dent prevention or life-saving systems), it must therefore be ensured by means of suitable de-

sign of the customer application or other action taken by the customer (e.g. installation of pro-

tective circuitry or redundancy) that no injury or damage is sustained by third parties in the event

of malfunction or failure of an electronic component.

3. The warnings, cautions and product-specific notes must be observed.

4. In order to satisfy certain technical requirements, some of the products described in this pub-

lication may contain substances subject to restrictions in certain jurisdictions (e.g. be-

cause they are classed as hazardous). Useful information on this will be found in our Material

Data Sheets on the Internet (www.tdk-electronics.tdk.com/material). Should you have any more

detailed questions, please contact our sales offices.

5. We constantly strive to improve our products. Consequently, the products described in this

publication may change from time to time. The same is true of the corresponding product

specifications. Please check therefore to what extent product descriptions and specifications

contained in this publication are still applicable before or when you place an order.

We also reserve the right to discontinue production and delivery of products. Consequent-

ly, we cannot guarantee that all products named in this publication will always be available. The

aforementioned does not apply in the case of individual agreements deviating from the foregoing

for customer-specific products.

6. Unless otherwise agreed in individual contracts, all orders are subject to our General Terms

and Conditions of Supply.

Important notes

11 6/19

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Important notes at the end of this document.

7. Our manufacturing sites serving the automotive business apply the IATF 16949 standard.

The IATF certifications confirm our compliance with requirements regarding the quality manage-

ment system in the automotive industry. Referring to customer requirements and customer spe-

cific requirements (“CSR”) TDK always has and will continue to have the policy of respecting in-

dividual agreements. Even if IATF 16949 may appear to support the acceptance of unilateral re-

quirements, we hereby like to emphasize that only requirements mutually agreed upon can

and will be implemented in our Quality Management System. For clarification purposes we

like to point out that obligations from IATF 16949 shall only become legally binding if individually

agreed upon.

8. The trade names EPCOS, CeraCharge, CeraDiode, CeraLink, CeraPad, CeraPlas, CSMP,

CTVS, DeltaCap, DigiSiMic, ExoCore, FilterCap, FormFit, LeaXield, MiniBlue, MiniCell, MKD,

MKK, MotorCap, PCC, PhaseCap, PhaseCube, PhaseMod, PhiCap, PowerHap, PQSine,

PQvar, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SiMic, SIMID, SineFormer, SIOV,

ThermoFuse, WindCap are trademarks registered or pending in Europe and in other coun-

tries. Further information will be found on the Internet at

www.tdk-electronics.tdk.com/trademarks.

Release 2018-10

Important notes