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« Back PDF (Print) 2.500 in. / 63.50 mm OD Toroid

MS - 250 125 - 2

Physical Dimensions
OD Bare Core Nominal 63.50 mm 2.500 in
Coated Core (max) 64.77 mm 2.550 in
ID Bare Core Nominal 31.37 mm 1.235 in
Coated Core (min) 30.48 mm 1.200 in
Ht Bare Core Nominal 25.00 mm 0.984 in
Coated Core (max) 25.90 mm 1.020 in
Magnetic Dimensions
Ae Effective Magnetic Cross Section 3.89 cm2
Le Effective Magnetic Path Length 14.3 cm 
Ve Effective Core Volume 55.8 cm3
WA Minimum Effective Window Area 7.73 cm2
SA Surface Area 150 cm2
MLT Mean Length Per Turn 10.1 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 48 MS-250014-2 MP-250014-2 FS-250014-2 HF-250014-2 OP-250014-2
26μ 89 MS-250026-2 SH-250026-2 MP-250026-2 FS-250026-2 HF-250026-2 OP-250026-2
40μ 137 MS-250040-2 FS-250040-2 OP-250040-2
60μ 206 MS-250060-2 SH-250060-2 MP-250060-2 FS-250060-2 HF-250060-2 OP-250060-2
75μ 258 MS-250075-2 FS-250075-2 OP-250075-2
90μ 310 MS-250090-2 FS-250090-2 OP-250090-2
125μ 430 MS-250125-2 SH-250125-2 MP-250125-2 HF-250125-2 OP-250125-2
147μ 506 MS-250147-2 MP-250147-2 HF-250147-2
160μ 550 MS-250160-2 MP-250160-2 HF-250160-2
173μ 595 MP-250173-2
205μ 705 MP-250205-2
Approx Unit Weight: 323 g 312 g 416 g 379 g 383 g 371 g
Test Conditions
Winding N=100, #18 AWG
Frequency 10 kHz
Voltage 1.7 V
AL Tolerance ±8%
Coating/Packaging Information
Coating Type Blue Epoxy
Voltage Breakdown 1000 Vrms
Unit 0.1 mA, 5 s
Package Quantity 27 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 23 29 37 47 59 74 93 116 145 182 227
Rdc(Ω) 4.8 m 9.6 m 19.5 m 39.4 m 78.6 m 156.9 m 313.5 m 622.0 m 1.2 2.5 4.9
Full
Winding
Turns 38 59 91 142 219 339 525 813 1,258 1,947 3,013
Rdc(Ω) 7.9 m 19.6 m 48.0 m 119.0 m 291.9 m 718.6 m 1.8 4.4 10.7 26.4 65.0