
Laminated U-Shield Ni-Fe or Si-Fe Soft Ferromagnetic Shield
Available
Product Description
The laminated U-shield is a soft ferromagnetic shield featuring superior material characteristics such as high linearity and very low hysteresis. It is available with two different materials: Ni-Fe and Si-Fe.
The shield is designed for planar current sensing in combination with a magnetic field sensor, i.e., Hall sensor, AMR sensor and a busbar conductor. The LU-shield protects the sensor from parasitic magnetic fields caused by nearby conductors or other magnetic field sources while at the same time it enhances sensitivity and signal-to-offset ratio of the sensor. Thanks to its laminated design it is suitable for high-speed applications.
Magnetic Characteristics
Parameter | Material | Typical Value | Unit |
---|---|---|---|
Relative Permeability | Ni-Fe | 100'000 | a.u. |
Si-Fe | 40'000 | ||
Initial Relative Permeability | Ni-Fe | 7000 | a.u. |
Si-Fe | 2500 | ||
Saturation Flux Density | Ni-Fe | 1 | T |
Si-Fe | 1.5 | ||
Hysteresis | Ni-Fe | 2.8 | A/m |
Si-Fe | n/a | ||
Curie Temperature | Ni-Fe | 450 | °C |
Si-Fe | 700 |
Material Specification
Material Specification | Lamination | Ni or Si content |
---|---|---|
Lamination and Nickel content | 0.5mm | 48% (Ni) |
Lamination and Silicon content | 0.5mm | <3.5% (Si) |
Geometry LU20-13-15-3 (*)
(drawing for LU20-13-15-3)

Available Standard Geometries*
Order code | W | L | H | T | Type2 |
---|---|---|---|---|---|
LU20-8-15-3-NiFe | 20 | 8 | 15 | 3 | Ni-Fe |
LU20-8-15-3-SiFe | 20 | 8 | 15 | 3 | Si-Fe |
LU20-13-15-3-NiFe | 20 | 13 | 15 | 3 | Ni-Fe |
LU20-13-15-3-SiFe | 20 | 13 | 15 | 3 | Si-Fe |
LU25-8-18-3-NiFe | 25 | 8 | 18 | 3 | Ni-Fe |
LU25-8-18-3-SiFe | 25 | 8 | 18 | 3 | Si-Fe |
LU25-13-18-3-NiFe | 25 | 13 | 18 | 3 | Ni-Fe |
LU25-13-18-3-SiFe | 25 | 13 | 18 | 3 | Si-Fe |
*other geometries on request
²all shield models are available with Ni-Fe or Si-Fe material