Laminated U-Shield Ni-Fe or Si-Fe Soft Ferromagnetic Shield

Laminated U-Shield Ni-Fe or Si-Fe Soft Ferromagnetic Shield

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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)

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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