Data SheetData Sheet
Date: September 2006/March 2011
EPCOS AG 2006, 2011. Reproduction, publication and dissemination of this data sheet and the
information contained therein without EPCOS’ prior express consent is prohibited.
Ferrites and accessories
RM 7, RM 7 LP
Cores and accessories
Series/Type: B65819, B65820, B65659
209/06
Please read Cautions and warnings and
Important notes at the end of this document.
To IEC 62317-4
Core without center hole
for transformer applications
Delivery mode: sets
Magnetic characteristics (per set)
Approx. weight (per set)
Gapped
Ungapped
with
center hole
without
center hole
Σ l/A
le
Ae
Amin
Ve
0.75
29.8
40
1190
0.7
30.4
43
39
1310
mm–1
mm
mm2
mm2
mm3
m6.5 7.2 g
Material AL value
nH
s
approx.
mm
µeOrdering code 1)
-A with center hole
-N with threaded sleeve
-J without center hole
N41 160 ±5% 0.30 90 B65819J0160J041
250 ±5% 0.18 141 B65819J0250J041
N48 250 ±3% 0.16 148 B65819+0250A048
315 ±3% 0.12 187 B65819+0315A048
Material AL value
nH
µePV
W/set
Ordering code
-J without center hole
N30 5000 +30/–20% 2810 B65819J0000R030
T38 10000 +40/–30% 5630 B65819J0000Y038
N49 1900 +30/–20% 1070 < 0.22 ( 50 mT, 500 kHz, 100 °C) B65819J0000R049
N87 2700 +30/–20% 1520 < 0.77 (200 mT, 100 kHz, 100 °C) B65819J0000R087
N97 2700 +30/–20% 1520 < 0.58 (200 mT, 100 kHz, 100 °C) B65819J0000R097
FRM0171-Q
8,4+0,5
11,3±0,25
ø14,75+0,65
3
M2
ø3+0,1
S
2,5±0,15
9,3 min.
0,717,2
_
17,2 0,7
_
0,820,3
_
13,5 0,2
_
ø7,25 0,3
_
1) Replace the + by the code letter “A” or “N” for the required version.
B65819Core
RM 7
309/06
Please read Cautions and warnings and
Important notes at the end of this document.
Coil former
Material: GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085:
H max. operating temperature 180 °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 Data Book 2007, chapter “Processing notes, 2.1”
Squared pins.
For matching clamp and insulating washers see page 4.
Sections AN
mm2
lN
mm
AR value
µΩ
Pins Ordering code
122.4 36.0 55.4 8B65820W1008D001
221.9 36.0 56.5 8B65820W1008D002
FRM0314-J-E
0.25
ø1.3+0.1
2x ground
1.3
_
0.45
8.25 0.1
_
ø14.65
ø7.3+0.15
_
ø8.3 0.1
0.25
_
4.8±0.3
View in mounting direction
Hole arrangement
0.75±0.05
1±0.1
Pin 1
marking
2.54
0.15
+0.05
0.45
_
0.15
0.45
+0.05
_
ø1+0.1
B65820Accessories
RM 7
4 03/11
Please read Cauti ons and warnings and
Important notes at the end of this document.
Clamp
With ground terminal, made of spring steel (tinned), 0.4 mm thick
Solderability to IEC 60068-2-20, test Ta, method 1 (aging 3): 235 °C, 2 s
Insulating washer 1 between core and coil former
For tolerance compensation and for insulation
Made of polyarylate film (UL 94 V-0, insulation class to IEC 60085: E 120 °C), 0.08 mm thick
Aryphan F685, [E167358 (M)], natural color, LOFO HIGH TECH FILM GMBH
Insulating washer 2 for double-clad PCBs
Made of polycarbonate (UL 94 V-0, insulation class to IEC 60085: E 120 °C), 0.25 mm thick
Makrofol FR, [E118859 (M)], natural color, BAYER MATERIALSCIENCE AG
Clamp Insulating washer 1 Insulating washer 2
Ordering code
Clamp (ordering code per piece, 2 are required) B65820B2001X000
Insulating washer 1 (reel packing, PU = 1 reel) B65820A5000X000
Insulating washer 2 (bulk) B65820D2005X000
FRM0321-2
10.6+0.3
4.5±0.25
2.6 max.
0.6x0.4
0.7±20.7±2
10
15.4±0.2
ø6.9±0.25
1.2±0.2
FRM0319-Q
B65820Accessories
RM 7
509/06
Please read Cautions and warnings and
Important notes at the end of this document.
Adjusting screw
Tube core with thread and core brake made of GFR polyterephthalate
Pocan B3235 ® [E245249 (M)], LANXESS AG
ab
Figure Tube core Ordering code
× length (mm) Material Color code
a2.62 × 3.6 N22 red B65659F0001X023
b2.75 × 4.4 N22 black B65659F0003X023
B65659Accessories
RM 7
609/06
Please read Cautions and warnings and
Important notes at the end of this document.
To IEC 62317-4
For compact transformers
Without center hole
Delivery mode: sets
Magnetic characteristics (per set)
Σ l/A= 0.52 mm
–1
le= 23.5 mm
Ae= 45.3 mm2
Amin = 39.6 mm2
Ve= 1060 mm3
Approx. weight 5.7 g/set
Ungapped
Material AL value
nH
µePV
W/set
Ordering code
T38 11500 +40/–30% 4750 B65819P0000Y038
N49 2400 +30/–20% 990 < 0.21 ( 50 mT, 500 kHz, 100 °C) B65819P0000R049
N92 2600 +30/–20% 1070 < 0.63 (200 mT, 100 kHz, 100 °C) B65819P0000R092
N87 3300 +30/–20% 1360 < 0.57 (200 mT, 100 kHz, 100 °C) B65819P0000R087
B65819PCore
RM 7
7 03/11
Ferrites and accessories
Cautions and warnings
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 their special behavior
under mechanical load.
Just like any ceramic material, ferrite cores are brittle and sensitive to any shock, fast changing or
tensile load. Especially fast cooling rates under ultrasonic cleaning, high static and cyclic loads can
cause cracks or failure of the ferrite cores.
For detailed information see Data Book 2007, 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 the value for the initial permeability. Thus, the embedding medium should offer
the greatest possible elasticity.
For detailed information see Data Book 2007, chapter "General - Definitions, 8.2".
Heating up
Ferrites can run hot during operation at higher flux densities and higher frequencies.
NiZn-materials
The m agnetic pr operties of NiZn- materials can ch ange irreversibly whe n e xposed to st rong
magnetic fields.
Processing notes
The start of the winding process should be soft. Otherwise, the flanges may be destroyed.
Excessive winding forces may damage the flanges or squeeze the tube so that the cores can no
longer be mounted.
Excessive sol dering ti me at high temperature (>300 °C) may affect coplanarity or pin
arrangement.
Not following the processing notes for soldering of the J-leg terminals may cause solderability
problems at the transformer because of contamination with tin oxide (SnO) from the tin bath or
burned insulation from the wir e. Fo r detailed i nformation se e Da ta Bo ok 2 007, ch apter
"Processing notes, 2.2".
The dimensions of the pin ho le arrangement are fixed and should be understood as a n ideal
recommendation for drilling the printed circuit board. In order to avoid problems when mounting
the transformer, customers should make allowances for manufacturing tolerances in the drilling
and pick-and-place processes by increasing the diameter of the pin holes.
8 01/10
Important notes
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
requirements that are often placed on our products in the areas of application concerned. We
nevertheless 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, EPCOS is either unfamiliar with individual customer applications or less familiar with them
than the customers themselves. For these reasons, it is always ultimately incumbent on the
customer to check and decide whether an EPCOS 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
failure 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 malfunction or failure of an electronic component could endanger human life or health (e.g.
in accident prevention or life-saving systems), it must therefore be ensured by means of suitable
design of the customer application or other action taken by the customer (e.g. installation of
protective 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
publication may contain substances subject to restrictions in certain jurisdictions (e.g.
because they are classed as hazardous). Useful information on this will be found in our
Material Data Sheets on the Internet (www.epcos.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.
Consequently, 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 the current version
of the “General Terms of Delivery for Products and Services in the Electrical Industry”
published by the German Electrical and Electronics Industry Association (ZVEI).
7. The trade names EPCOS, BAOKE, Alu-X, CeraDiode, CSMP, CSSP, CTVS, DeltaCap,
DigiSiMic, DSSP, MiniBlue, MiniCell, MKK, MLSC, MotorCap, PCC, PhaseCap, PhaseCube,
PhaseMod, PhiCap, SIFERRIT, SIFI, SIKOREL, SilverCap, SIMDAD, SiMic, SIMID,
SineFormer, SIOV, SIP5D, SIP5K, ThermoFuse, WindCap are trademarks registered or
pending in Europe and in other countries. Further information will be found on the Internet at
www.epcos.com/trademarks.