From: "Saved by Internet Explorer 11" Subject: Micrometals, Inc. - Iron Powder Cores Date: Mon, 20 Jan 2014 10:32:40 -0800 MIME-Version: 1.0 Content-Type: multipart/related; type="text/html"; boundary="----=_NextPart_000_004F_01CF15CA.F217B210" X-MimeOLE: Produced By Microsoft MimeOLE V6.1.7601.17609 This is a multi-part message in MIME format. ------=_NextPart_000_004F_01CF15CA.F217B210 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Content-Location: file://C:\Users\R&D 1\Documents\Research\Power Supplies\PC Tolerances.htm Micrometals, Inc. - Iron Powder Cores =20 =20 =20 =20 =20 =20

Home< Material Details <=20 PC Tolerances
PC Tolerances

Magnetic = =20 Tolerance
Material =20 (Mix No.)
-2
-8
-14
-18
-19
-26
-28
-30
-33
-34
-35
-38
-40
-45
-52
-267
-275

AL Tolerance
=B15%
=B110%
=B110%
=B110%
=B110%
=B110%
=B110%
=B110%
=B110%
=B110%
=B110%
=B110%
=B110%
=B110%
=B110%
+35%
= =20 -25%
+35%
= =20 -25%

The cores are = =20 manufactured to the AL values listed; = =20 the permeability for each material is for reference = =20 only. In all cases, the AL values are = =20 based on a peak AC flux density of 10 guass (1mT) = =20 at a frequency of 10kHz. Measurements made under = =20 other conditions will produce results in accordance = =20 with the magnetic curves shown in the Percent=20 Initial Permeability vs. Peak AC Flux Density = Graph.

The toroidal cores = =20 are tested with an evenly-spaced full single-layer = =20 winding in order to minimize leakage effects. Iron = =20 powder cores tested with a small number of turns = =20 which are not evenly distributed will produce = =20 higher inductance readings than expected. The E = =20 cores are tested with 100 turns.

The Magnetic = =20 Characteristic curves shown are have a typical = =20 tolerance of =B110%. The curves on Core Loss = =20 characteristics have a typical tolerance of = =20 = =B115%.

=20

Dimensional =20 Tolerances (inches)

TOROIDS*
OD
ID
Ht

TOROIDS*
OD
ID
Ht

T16-T20
=B1.010
=B1.010
=B1.010
T150-T225
=B1.025
=B1.025
=B1.030

T25-T38
=B1.015
=B1.015
=B1.020
T249-T400
=B1.030
=B1.030
=B1.030

T40-T72**
=B1.020
=B1.020
=B1.020
T520-T650
=B1.050
=B1.050
=B1.050

T44-T72**
=B1.020
=B1.020
=B1.020





T80-T141
=B1.020
=B1.020
=B1.025





-

COMPOSITE*
OD
ID
Ht
COMPOSITE*
OD
ID
Ht

ST50
=B1.015
=B1.015
=B1.020
ST150
=B1.040
=B1.030
=B1.030

ST83-ST102
=B1.030
=B1.020
=B1.025
ST200
=B1.050
=B1.040
=B1.040

-

BUS = BAR*
A
B
D
E
L



HS300-HS400
=B1.015
=B1.020
=B1.005
=B1.005
=B1.020



-

U = =20 CORES
A
B
C
E
F
G


U61-U80
=B1.010
=B1.010
=B1.010
=B1.010
=B1.010
=B1.010


U350
=B1.020
=B1.020
=B1.015
=B1.020
=B1.015
=B1.030


-

E = =20 CORES
A
B
C
D
F
G
MAX = =20 GAP***

E49-E118
=B1.010
=B1.010
=B1.005
=B1.007
=B1.005
=B1.007
.0015

E125-E162
=B1.015
=B1.015
=B1.007
=B1.010
=B1.007
=B1.010
.0015

E168-E225
=B1.015
=B1.015
=B1.010
=B1.010
=B1.007
=B1.010
.0020

E305-E450
=B1.030
=B1.030
=B1.015
=B1.020
=B1.015
=B1.020
.0030

E610
=B1.040
=B1.040
=B1.025
=B1.030
=B1.025
=B1.030
.0050

-

EF = =20 CORES
A
B
C
D
E/F
G
MAX = =20 GAP***

EF60-EF80
=B1.010
=B1.010
=B1.005
=B1.010
=B1.005
=B1.007
.0030

-

EM = =20 CORES
A
B
C
D
G
H
MAX = =20 GAP***

EM145
=B1.015
=B1.015
=B1.010
=B1.020
=B1.010
=B1.015
.0020

EM168-EM220
=B1.015
=B1.015
=B1.010
=B1.020
=B1.010
=B1.015
.0030

-

PLAIN =20 CORES
OD
L






Pxx24-Pxx40
+.000/-.005
=B1.015






Pxx48-Pxx76
+.000/-.005
=B1.020






-

HOLLOW =20 CORES
OD
ID
L





Hx10-Hx12
+.000/-.005
+.005/-.000
=B1.010





Hxx14-Hxx20
+.000/-.005
+.005/-.000
=B1.015





Hxx21-Hxx25
+.000/-.005
+.005/-.000
=B1.020





-

DISCS
OD
CB
ID
T




D45-D80
+.000/-.010
+.005/-.000
+.005/-.000
=B1.007




-

*Tolerance includes = =20 coating
**Gap per piece

** OD for T50-8/90 = =20 and T50-8B/90 is + 025/-=20 = .015

About Us | = What We Do |=20 Contact Us = | Samples | = Catalog |=20 Thermal Aging | Parts | = Materials |=20 Software | = Home

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