Shapes/Sizes Available

« Back PDF (Print) 1.570 in. / 39.90 mm OD Toroid

MS - 157 125 - 2

Physical Dimensions
OD Bare Core Nominal 39.88 mm 1.570 in
Coated Core (max) 40.69 mm 1.602 in
ID Bare Core Nominal 24.13 mm 0.950 in
Coated Core (min) 23.32 mm 0.918 in
Ht Bare Core Nominal 14.48 mm 0.570 in
Coated Core (max) 15.37 mm 0.605 in
Magnetic Dimensions
Ae Effective Magnetic Cross Section 1.07 cm2
Le Effective Magnetic Path Length 9.85 cm 
Ve Effective Core Volume 10.5 cm3
WA Minimum Effective Window Area 4.27 cm2
SA Surface Area 60.2 cm2
MLT Mean Length Per Turn 5.98 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 19 MS-157014-2 MP-157014-2 FS-157014-2 HF-157014-2 OP-157014-2
26μ 35 MS-157026-2 SH-157026-2 MP-157026-2 FS-157026-2 HF-157026-2 OP-157026-2
40μ 54 MS-157040-2 FS-157040-2 OP-157040-2
60μ 81 MS-157060-2 SH-157060-2 MP-157060-2 FS-157060-2 HF-157060-2 OP-157060-2
75μ 101 MS-157075-2 FS-157075-2 HF-157075-2 OP-157075-2
90μ 121 MS-157090-2 FS-157090-2 OP-157090-2
125μ 168 MS-157125-2 SH-157125-2 MP-157125-2 HF-157125-2 OP-157125-2
147μ 198 MS-157147-2 MP-157147-2 HF-157147-2
160μ 215 MS-157160-2 MP-157160-2 HF-157160-2
173μ 233 MP-157173-2
205μ 276 MP-157205-2
Approx Unit Weight: 61 g 59 g 78 g 71 g 72 g 70 g
Test Conditions
Winding N=70, #20 AWG
Frequency 10 kHz
Voltage 0.33 V
AL Tolerance ±8%
Coating/Packaging Information
Coating Type Blue Epoxy
Voltage Breakdown 1000 Vrms
Unit 0.1 mA, 5 s
Package Quantity 216 Pcs/Box
Winding Table
Wire Size AWG 8 10 12 14 16 18 20 22 24 26 28
mm 3.150 2.500 2.000 1.600 1.250 1.000 0.800 0.630 0.500 0.400 0.315
Single
Layer
Turns 17 22 28 35 45 56 70 88 111 138 173
Rdc(Ω) 2.1 m 4.3 m 8.7 m 17.3 m 35.4 m 70.0 m 139.2 m 278.3 m 558.3 m 1.1 2.2
Full
Winding
Turns 22 35 54 83 128 199 307 476 736 1,139 1,764
Rdc(Ω) 2.7 m 6.8 m 16.8 m 41.0 m 100.6 m 248.8 m 610.5 m 1.5 3.7 9.1 22.4