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« Back PDF (Print) 0.310 in. / 7.87 mm OD Toroid

MS - 031 125 - 8

Physical Dimensions
OD Bare Core Nominal 7.87 mm 0.310 in
Coated Core (max) 8.51 mm 0.335 in
ID Bare Core Nominal 3.96 mm 0.156 in
Coated Core (min) 3.43 mm 0.135 in
Ht Bare Core Nominal 3.18 mm 0.125 in
Coated Core (max) 3.81 mm 0.150 in
Magnetic Dimensions
Ae Effective Magnetic Cross Section 0.0615 cm2
Le Effective Magnetic Path Length 1.79 cm 
Ve Effective Core Volume 0.11 cm3
WA Minimum Effective Window Area 0.0924 cm2
SA Surface Area 2.65 cm2
MLT Mean Length Per Turn 1.44 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-031014-8 MP-031014-8 FS-031014-8 HF-031014-8 OP-031014-8
26μ 14 MS-031026-8 SH-031026-8 MP-031026-8 FS-031026-8 HF-031026-8 OP-031026-8
40μ 17 MS-031040-8 FS-031040-8 OP-031040-8
60μ 25 MS-031060-8 SH-031060-8 MP-031060-8 FS-031060-8 HF-031060-8 OP-031060-8
75μ 31 MS-031075-8 FS-031075-8 OP-031075-8
90μ 37 MS-031090-8 FS-031090-8 OP-031090-8
125μ 52 MS-031125-8 SH-031125-8 MP-031125-6 HF-031125-8 OP-031125-8
147μ 62 MS-031147-8 MP-031147-8 HF-031147-8
160μ 66 MS-031160-8 MP-031160-8 HF-031160-8
173μ 73 MP-031173-8
205μ 86 MP-031205-8
Approx Unit Weight: 0.64 g 0.61 g 0.82 g 0.75 g 0.76 g 0.73 g
Test Conditions
Winding N=45, #32 AWG
Frequency 10 kHz
Voltage 0.012 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 14,400 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 74 93 116
Rdc(Ω) 8.4 m 17.0 m 34.7 m 70.6 m 141.5 m 287.1 m 580.1 m 1.2 2.3 4.6 9.2
Full
Winding
Turns 10 16 25 38 59 91 141 219 339 524 812
Rdc(Ω) 7.6 m 19.4 m 48.2 m 116.6 m 287.9 m 706.2 m 1.7 4.3 10.6 26.0 64.1