Shapes/Sizes Available

« Back PDF (Print) 3.060 in. / 77.80 mm OD Toroid

MS - 301 125 - 2

Physical Dimensions
OD Bare Core Nominal 77.80 mm 3.063 in
Coated Core (max) 78.94 mm 3.108 in
ID Bare Core Nominal 49.23 mm 1.938 in
Coated Core (min) 47.96 mm 1.888 in
Ht Bare Core Nominal 15.88 mm 0.625 in
Coated Core (max) 17.15 mm 0.675 in
Magnetic Dimensions
Ae Effective Magnetic Cross Section 2.22 cm2
Le Effective Magnetic Path Length 19.6 cm 
Ve Effective Core Volume 43.5 cm3
WA Minimum Effective Window Area 18.1 cm2
SA Surface Area 193 cm2
MLT Mean Length Per Turn 8.93 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 19.9 MS-301014-2 MP-301014-2 FS-301014-2 HF-301014-2 OP-301014-2
26μ 37 MS-301026-2 SH-301026-2 MP-301026-2 FS-301026-2 HF-301026-2 OP-301026-2
40μ 57 MS-301040-2 FS-301040-2 OP-301040-2
60μ 85 MS-301060-2 SH-301060-2 MP-301060-2 FS-301060-2 HF-301060-2 OP-301060-2
75μ 107 MS-301075-2 FS-301075-2 OP-301075-2
90μ 128 MS-301090-2 FS-301090-2 OP-301090-2
125μ 178 MS-301125-2 SH-301125-2 MP-301125-2 HF-301125-2 OP-301125-2
147μ 209 MS-301147-2 MP-301147-2 HF-301147-2
160μ 228 MS-301160-2 MP-301160-2 HF-301160-2
173μ 246 MP-301173-2
205μ 284 MP-301205-2
Approx Unit Weight: 251 g 243 g 324 g 296 g 299 g 289 g
Test Conditions
Winding N=120, #18 AWG
Frequency 10 kHz
Voltage 1.2 V
AL Tolerance ±8%
Coating/Packaging Information
Coating Type Blue Epoxy
Voltage Breakdown 1000 Vrms
Unit 0.1 mA, 5 s
Package Quantity 36 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 38 48 60 75 95 118 148 185 230 287 358
Rdc(Ω) 7.0 m 14.0 m 27.9 m 55.4 m 111.5 m 220.3 m 439.5 m 873.8 m 1.7 3.4 6.8
Full
Winding
Turns 95 146 227 351 543 840 1,300 2,012 3,114 4,820 7,459
Rdc(Ω) 17.4 m 42.6 m 105.4 m 259.1 m 637.6 m 1.6 3.9 9.5 23.4 57.6 141.7