Coupled Inductors

The WE-MCRI is an innovative molded coupled inductor with fully automated bifilar winding process. It offers an almost ideal coupling coefficient up to 0.995. The WE-MCRI features a soft saturation behavior with its crystalline core structure and distributed air gap. The coupled inductor range includes high voltage isolation versions up to 2 kV, low profile types and versions with various turns ratios.

WE-MCRI – Innovative Molded Coupled Inductor by Würth Elektronik eiSos

Product Benefits

  • Up to 0.995 coupling coefficient
  • Up to 2.0 kV isolation
  • Soft saturation
  • Up to 120 A ISAT and 48 A IR
  • Large portfolio

High Coupling Version

The first fully magnetically shielded coupled inductor with molding technology for high current!

The distributed air gap within the crystalline structure

High Coupling Coefficient

Soft Saturation

High Voltage Version

High Voltage Isolation up to 2 kV!

Standard Isulation

High Voltage Insulation with multiple Layers

Demo Board - Dual-Output Isolated Buck Converter

With the High Voltage Coupled Inductor WE-CPIB HV, an additional isolated output in a buck converter can be achieved, with minimal solution size and design effort.

Demo Module Features:

  • USB powered
  • Single and Dual-output buck operation
  • Output LED indicators

Typical Applications Overview

Multi Output Buck

Flyback

SEPIC

ZETA

Cuk

High Step-up Boost

Topoloy Isolation Multiple Output Output Complexity Cost Product
Series
Recommendation
Multi output Buck Isolated/Non-isolated Yes Non-inverted Low Low WE-DPC HV, WE-TDC HV,
WE-MTCI
Flyback Isolated/Non-isolated Yes Non-inverted Moderate Moderate WE-CPIB HV, WE-MTCI,
WE-TDC HV
SEPIC Non-isolated No Non-inverted Moderate Moderate WE-DD, WE-MCRI,
WE-CFWI
ZETA Non-isolated No Non-inverted Moderate Moderate WE-CFWI, WE-DCT,
WE-DPC
Cuk Non-isolated No Non-inverted Moderate Moderate WE-CFWI, WE-DD,
WE-MCRI
High Step-up Boost Non-isolated No Non-inverted Moderate Low WE-EHPI, WE-MTCI

Product Overview

High Coupling
Series Size L x W x H (mm) L (μH) IR (A) ISAT (A) RDC typ (mΩ) UR (VDC)
WE-MCRI 1090 11 x 10 x 9.0 1 – 47 17 – 2.3 43.5 – 6 4.5 – 260 60
High Voltage
Series Size L x W x H (mm) L (μH) IR (A) ISAT (A) RDC typ (mΩ) UR (VRMS)
WE-CPIB HV
4828 5.0 x 5.0 x 3.0 4.7 – 47 1.45 – 0.55 0.73 – 2.2 105 – 800 250
WE-TDC HV 8018 8.0 x 8.0 x 1.8 5.6 – 22 1.4 – 0.75 2 – 1 190 – 700 250
8038 8.0 x 8.0 x 3.8 4.7 - 33 2.45 - 0.85 4.7 - 1.85 85 - 640 250
WE-DPC HV 5030 5.2 x 5.2 x 3.1 1 x 47 2.9 – 0.6 5 – 0.7 32 – 840 250
Various Turn Ratio 1:n
Series Size L x W x H (mm) L (μH) IR (A) ISAT (A) RDC typ (mΩ) UR (VDC)
WE-MTCI 5030 5.2 x 5.2 x 3.1 10 - 33 0.95 – 0.45 1.5 – 0.75 349 - 3758 80
WE-EHPI 5838 8.0 x 8.0 x 1.8 7 - 70000 1.9 - 1.5 1.3 - 0.7 0.085 – 205 80
Low Profile
Series Size L x W x H (mm) L (μH) IR (A) ISAT (A) RDC typ (mΩ) UR (VDC)
WE-TDC 8018 8.0 x 8.0 x 1.8 0.33 – 22 4.0 – 0.7 9.0 – 1.1 0.0111 – 0.048 80
8038 8.0 x 8.0 x 3.8 0.39 – 22 4.5 – 1.0 14.0 – 1.8 0.0116 – 0.228 80
High Current
Series Size L x W x H (mm) L (μH) IR (A) ISAT (A) RDC typ (mΩ) UR (VDC)
WE-CFWI 1310 15.5 x 13.2 x 10.5 0.8 – 4.4
 28 – 12 62 – 24 1.6 – 9.6 80
1312 15.5 x 13.2 x 12.5 6.8 – 10 14 – 13 16 – 13.5 11.3 – 13.9 80
1813 21.0 x 18.5 x 13.5 6.8 – 10 13.5 – 11.5 26 – 22 6.1 – 11 80
Toroidal Core
Series Size L x W x H (mm) L (μH) IR (A) ISAT (A) RDC typ (mΩ) UR (VDC)
WE-DCT SH 23 x 18.5 x 11.5 0.091– 100 14.5 – 1.1 120 – 1.3 2.8 – 140 80
General Purpose Coupled Inductors
Series Size L x W x H (mm) L (μH) IR (A) ISAT (A) RDC typ (mΩ) UR (VDC)
WE-DD 7332
7.3 x 7.3 x 4.0 1.3 – 100 4.4 – 0.3
 6.3 – 0.7 0.027 – 1.73
 80
7345
7.3 x 7.3 x 4.8
 1.8 – 100
 4.7 – 0.65
6.5 – 0.9
0.025 – 1.3
 80
1260 12.5 x 12.5 x 6.5
 1.5 – 100
5.85 – 1.2
14.0 – 1.7
0.012 – 0.293
 80
1280 12.5 x 12.5 x 8.5
 1.5 – 470
 6.25 – 0.7
 18.0 – 0.9
 0.011 – 1
 80
1210 12.5 x 12.5 x 10.5 2.2 – 47 4.1 – 1.9
 19.0 – 3.6 0.015 – 0.13 80
5838 6.0 x 6.0 x 4.0 1.0 – 47 4.5 – 0.9 5.0 – 0.7 25 - 245 80

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