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RF Tolerances


Magnetic Tolerance
Material
-1
-2
-3
-4
-6
-7
-8
-10
-12
-15
-17
-42
-0

AL Tolerance

±10%
±5%
±10%
±5%
±5%
±5%
±10%
±5%
±5%
±10%
±5%
±10%
N/A

The cores are manufactured to the AL values listed; the permeability for each material is for reference only. Toroidal cores are tested with an evenly-spaced full single-layer winding in order to minimize leakage effects. Iron powder cores tested with a small number of turns which are not evenly distributed will produce higher inductance readings than expected.

The saturation curves have a typical tolerance ±10%. The core loss curves have a typical tolerance of ±25%.

Dimensional Tolerances (inches)

TOROIDS*

OD
ID
Ht

TOROIDS*

OD
ID
Ht

T5-T12

±.005
±.005
±.005
T80-T130
±.020
±.020
±.025

T16-T20

±.010
±.010
±.010
T157-T225
±.025
±.025
±.030

T22-T37

±.015
±.015
±.020
T300-T520
±.030
±.030
±.030

T44-T72

±.020
±.020
±.020





-

BALUN CORES

A
B
ID
D
Length


BLN814-BLN1728

±.005
±.005
±.005
±.005
±.007


-

PLAIN CORES

OD
Length





P22

+.000/-.003
±.005





P23-P35

+.000/-.003
±.010






P48-P810

+.000/-.005
±.010






P825-P2028

+.000/-.005
±.015






P2440-P6448

+.000/-.005
±.020






-

HOLLOW CORES

OD
ID
Length




H22-H68

+.000/-.005
+.005/-.000
±.010




H520-H918

+.000/-.005
+.005/-.000
±.015




H1020-H1616

+.000/-.005
+.005/-.000
±.020





-

SLEEVES

OD
ID
Length




S2-S7

+.000/-.005
+.005/-.000
±.010




S10-S12

+.000/-.005
+.005/-.000
±.015




S16-S30

+.000/-.005
+.005/-.000
±.015




-

THREADED CORES

OD
Length






TH03-TH412

±.001
+.010






-

CUPS

OD
D
H
Ht
Depth



C8-C23

+.000/-.005
+.005/-.000
+.005/-.000
±.010
±.005



-

DISCS

OD
D
H
T



D9-D30

+.000/-.005
+.005/-.000
+.005/-.000
±.004



-

TORIODS (RECTANGULAR)

OD
ID
Ht





TR11

+.008
+.008
+.008





-

SQUARED BOBBINS

A
B
C
D
E
F


SBB0505-SBB3333

±.003
±.003
±.003
±.003
±.003
±.003
±.003
-

*Tolerance includes coating

 


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