Flux Concentrators / Shields
Laminated Flux Concentrators
High-Performance Magnetic Cores for Precision Current Sensing
Custom Laminated Flux Concentrators and Precision Stacking
Designed to minimize eddy current losses, these cores offer superior shielding and signal clarity for both standard and custom industrial geometries.
Laminated Flux Concentrators for High Speed Sensing
Laminated Flux Concentrators are engineered for high-precision, high-efficiency current sensing applications. These soft ferromagnetic cores are designed to work in conjunction with magnetic field sensors—such as Hall effect sensors—for contactless current measurement across a wide range of amperages. These concentrators significantly improve the accuracy and linearity of sensing systems by channeling magnetic flux with minimal losses. The laminated structure minimizes eddy current and hysteresis losses, making them ideal for use in high-speed and Mid-frequency applications.
Key Features
1
High Permeability
Ensures efficient magnetic flux guidance
2
Low Power Loss
Reduced hysteresis and eddy current losses
3
Contactless Measurement
Operates without direct connection to the conductor
4
Customizable Thickness
Available in customer-specific lamination counts
5
High Linearity
Accurate response across the magnetic field range
6
Thermal Stability
Consistent performance across temperature variations
7
Rapid Response
<2 microsecond response time suitable for fast-switching applications
8
Versatile Configurations
Customizable by application
Technical Specifications
Magnetic Properties
Available Soft Magnetic alloys and their typical Magnetic, Chemical and Physical properties:
| Magnetic Properties | |||||||
|---|---|---|---|---|---|---|---|
| Properties | Measurement | Unit | 80% NiFe⁷ | Mumetal⁷ | 48% NiFe⁸ | Si Steel | Fe-49% Co-2%V |
| DC Magnetic Properties | Bs | Tesla | 0.75¹ | 0.76¹ | 1.5³ | 1.73⁹ | 2.25(11) |
| Br | Tesla | 0.4² | 0.5² | 1.1³ | - | 1.3 | |
| B at 100 A/m | Tesla | - | - | 1.2 | - | - | |
| Hc² | A/m | 0.35 | 0.6 | 2.8 | - | 40 to 160(12) | |
| µ4⁴ | - | 550000 | 120000 | - | - | - | |
| µ max | - | 570000 | 350000 | 190000 | - | 18000 | |
| 60Hz AC Magnetic Properties | µ4z⁵ | - | 70000 | 50000 | 10400 | >2500 | 1200 |
| µz8⁶ | - | - | - | 54000 | - | - | |
| µ max | - | 95000 | 95000 | - | - | 12000 | |
| Core loss | W/Kg | 0.015 | 0.015 | 0.4 | 3.9¹⁰ | 2.3 to 3.0(13), 3.8 to 5(14) | |
Technical Specifications
Chemical Composition
| Elements | Unit | 80% NiFe⁷ | Mumetal⁷ | 48% NiFe⁸ | Si Steel | Fe-49% Co-2%V |
|---|---|---|---|---|---|---|
| Ni | % | 78-81 | 78-81 | 47-48 | Nil | - |
| Mo | % | 4.5-6 | 4.5-6 | Nil | Nil | - |
| Si | % | 0.05-0.4 | 0.05-0.4 | 0.1 | 1.6 - 2.1 | - |
| Mn | % | 0-0.5 | 0-0.5 | 0.5 | 0.5 | - |
| C | % | 0.01 | 0.01 | 0.005 | 0.01 | - |
| Co | % | - | - | - | - | 49 |
| V | % | - | - | - | - | 2 |
| Fe | % | Balance | Balance | Balance | Balance | Balance |
Technical Specifications
Physical Properties
| Characteristic | Unit | 80% NiFe⁷ | Mumetal⁷ | 48% NiFe⁸ | Si Steel | Fe-49% Co-2%V |
| Density | g/cm³ | 8.7 | 8.7 | 8.2 | 7.75 | 8.12 |
| Specific Heat | J/Kg.˚C | 460 | 460 | 500 | - | 460 |
| Thermal conductivity | W/m.˚C | 19 | 19 | 13 | - | 33 |
| Mean CTE between -50˚C & +200˚C | ˚C⁻¹ | 12 x 10⁻⁶ | 12 x 10⁻⁶ | 8 x 10⁻⁶ | - | 9.7 x 10⁻⁶ |
| Electrical resistivity | µΩ.cm | 60 | 60 | 45 | - | 40 |
| Curie Point | ᵒC | 420 | 420 | 450 | - | 950 |
| Coefficient of magnetostriction at Saturation ∆l / l | - | 1-3 x 10⁻⁶ | 1-3 x 10⁻⁶ | 24 x 10⁻⁶ | - | 70 x 10⁻⁶ |
| Melting temperature | ᵒC | 1450 | 1450 | 1425 | - | 1480 |
| Hardness(Cold Worked) | Hv | 325 | 325 | 250 | - | 400 |
| UTS(Cold Worked) | MPa | 1050 | 1050 | 850 | - | 1200 |
| 0.2% PS(Cold Worked) | MPa | 1030 | 1030 | 820 | - | 1150 |
| Elongation(Cold Worked) | % | 3 | 3 | 3 | - | 2 |
| Hardness(Annealed) | Hv | 160 | 160 | 140 | 155 | 220 |
| UTS(Annealed) | MPa | 650 | 650 | 500 | 380 | 480 |
| 0.2% PS(Annealed) | MPa | 280 | 280 | 250 | 250 | 300 |
| Elongation(Annealed) | % | 35 | 35 | 40 | min 30 | 4.5 |
| Grain Size(Annealed) | - | 8 | 8 | 9 | - | - |
| Hardness(Finished Part) | Hv | 110 | 110 | 100 | - | - |
| UTS(Finished Part) | MPa | 530 | 530 | 450 | - | - |
| 0.2% PS(Finished Part) | MPa | 160 | 160 | 200 | - | - |
| Elongation(Finished Part) | % | 45 | 45 | 35 | - | - |
| Grain Size(Finished Part) | - | 0-3 | 0-3 | 0 | - | - |
PML’s Standard Flux Concentrators
(All dimensions are in mm)
| Order Code | A | B | C | D | E | F | G |
|---|---|---|---|---|---|---|---|
| C-2.5-4-3.8-SiFe | 2.5 | 4 | 14 | 14 | 6 | 6 | 3.8 |
| C-2.5-4-3.8-NiFe | 2.5 | 4 | 14 | 14 | 6 | 6 | 3.8 |
| C-5-4.5-4.5-SiFe | 5 | 4.5 | 23 | 16.4 | 14 | 7.5 | 4.5 |
| C-5-4.5-4.5-NiFe | 5 | 4.5 | 23 | 16.4 | 14 | 7.5 | 4.5 |
| C-8-6.25-8-SiFe | 8 | 6.25 | 40 | 20 | 27.5 | 7.5 | 8 |
| C-8-6.25-8-NiFe | 8 | 6.25 | 40 | 20 | 27.5 | 7.5 | 8 |
End Applications
1
Automotive current sensing
2
Electric energy meters
3
Industrial automation systems
4
Power electronics monitoring
Why Choose PML?
1
Fully equipped in-house infrastructure for Design, Prototyping, Testing-Calibration and mass production
2
Approved by Melexis, a global Hall sensor leader
3
Strong background in magnetic metallurgy and core manufacturing
4
AEC-Q compliant testing lab and dimensional quality control
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