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« Back PDF (Print) 0.277 in. / 7.04 mm OD Toroid

MS - 028 125 - 8

Physical Dimensions
OD Bare Core Nominal 7.04 mm 0.277 in
Coated Core (max) 7.67 mm 0.302 in
ID Bare Core Nominal 3.96 mm 0.156 in
Coated Core (min) 3.45 mm 0.136 in
Ht Bare Core Nominal 5.08 mm 0.200 in
Coated Core (max) 5.72 mm 0.225 in
Magnetic Dimensions
Ae Effective Magnetic Cross Section 0.075 cm2
Le Effective Magnetic Path Length 1.68 cm 
Ve Effective Core Volume 0.126 cm3
WA Minimum Effective Window Area 0.0937 cm2
SA Surface Area 2.8 cm2
MLT Mean Length Per Turn 1.74 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 8 MS-028014-8 MP-028014-8 FS-028014-8 HF-028014-8 OP-028014-8
26μ 14 MS-028026-8 SH-028026-8 MP-028026-8 FS-028026-8 HF-028026-8 OP-028026-8
40μ 22 MS-028040-8 FS-028040-8 OP-028040-8
60μ 33 MS-028060-8 SH-028060-8 MP-028060-8 FS-028060-8 HF-028060-8 OP-028060-8
75μ 42 MS-028075-8 FS-028075-8 OP-028075-8
90μ 50 MS-028090-8 FS-028090-8 OP-028090-8
125μ 70 MS-028125-8 SH-028125-8 MP-028125-8 HF-028125-8 OP-028125-8
147μ 81 MS-028147-8 MP-028147-8 HF-028147-8
160μ 89 MS-028160-8 MP-028160-8 HF-028160-8
173μ 95 MP-028173-8
205μ 113 MP-028205-8
Approx Unit Weight: 0.73 g 0.70 g 0.94 g 0.86 g 0.87 g 0.84 g
Test Conditions
Winding N=40, #32 AWG
Frequency 10 kHz
Voltage 0.013 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 12,600 Pcs/Box
Winding Table
Wire Size AWG 22 24 26 28 30 32 34 36 38 40 42
mm 0.630 0.500 0.400 0.315 0.250 0.200 0.160 0.125 0.100 0.080 0.063
Single
Layer
Turns 11 14 18 23 29 37 47 59 75 93 117
Rdc(Ω) 10.1 m 20.5 m 41.9 m 85.1 m 170.7 m 346.3 m 699.6 m 1.4 2.8 5.6 11.1
Full
Winding
Turns 10 16 25 39 60 92 143 222 343 531 821
Rdc(Ω) 9.2 m 23.4 m 58.2 m 144.3 m 353.1 m 861.1 m 2.1 5.3 12.9 31.8 78.2