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« Back PDF (Print) 0.250 in. / 6.35 mm OD Toroid

MS - 025 125 - 8

Physical Dimensions
OD Bare Core Nominal 6.35 mm 0.250 in
Coated Core (max) 6.99 mm 0.275 in
ID Bare Core Nominal 2.79 mm 0.110 in
Coated Core (min) 2.29 mm 0.090 in
Ht Bare Core Nominal 2.79 mm 0.110 in
Coated Core (max) 3.43 mm 0.135 in
Magnetic Dimensions
Ae Effective Magnetic Cross Section 0.0476 cm2
Le Effective Magnetic Path Length 1.36 cm 
Ve Effective Core Volume 0.0642 cm3
WA Minimum Effective Window Area 0.041 cm2
SA Surface Area 1.8 cm2
MLT Mean Length Per Turn 1.27 cm 
Permeability Part Numbers
Reference
Permeability
AL Value
(nH/N2)
MS
Sendust
SH
High Freq. Sendust
MPP
Molypermalloy
FluxSan
Silicon Iron
Hi-Flux
Nickle Iron
Optilloy
Optimized Alloy
14μ 6 MS-025014-8 MP-025014-8 FS-025014-8 HF-025014-8 OP-025014-8
26μ 10 MS-025026-8 SH-025026-8 MP-025026-8 FS-025026-8 HF-025026-8 OP-025026-8
40μ 16 MS-025040-8 FS-025040-8 OP-025040-8
60μ 24 MS-025060-8 SH-025060-8 MP-025060-8 FS-025060-8 HF-025060-8 OP-025060-8
75μ 30 MS-025075-8 FS-025075-8 OP-025075-8
90μ 36 MS-025090-8 FS-025090-8 OP-025090-8
125μ 52 MS-025125-8 SH-025125-8 MP-025125-8 HF-025125-8 OP-025125-8
147μ 58 MS-025147-8 MP-025147-8 HF-025147-8
160μ 64 MS-025160-8 MP-025160-8 HF-025160-8
173μ 69 MP-025173-8
205μ 82 MP-025205-8
Approx Unit Weight: 0.37 g 0.36 g 0.48 g 0.44 g 0.44 g 0.43 g
Test Conditions
Winding N=30, #32 AWG
Frequency 10 kHz
Voltage 0.006 V
AL Tolerance ±8% (±12% Super-MSS)
Coating/Packaging Information
Coating Type Parylene N
Voltage Breakdown 500 Vrms
Unit 0.1 mA, 5 s
Package Quantity 21,600 Pcs/Box
Winding Table
Wire Size AWG 26 28 30 32 34 36 38 40 42 44 -
mm 0.400 0.315 0.250 0.200 0.160 0.125 0.100 0.080 0.063 0.050 -
Single
Layer
Turns 11 14 19 24 30 38 49 61 77 96 -
Rdc(Ω) 18.7 m 37.9 m 81.7 m 164.2 m 326.3 m 657.4 m 1.3 2.7 5.4 10.6 -
Full
Winding
Turns 11 17 26 41 63 98 151 234 362 560 -
Rdc(Ω) 18.7 m 46.0 m 111.8 m 280.4 m 685.3 m 1.7 4.2 10.2 25.2 62.0 -