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.

Description

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
Si-Fe
100.000
40.000
a.u.
Initial Relative Permeability Ni-Fe
Si-Fe
7000
2500
a.u.
Saturation Flux Density Ni-Fe
Si-Fe
1
1.5
T
Hysteresis Ni-Fe
Si-Fe
2.8
n/a
A/m
Curie Temperature Ni-Fe
Si-Fe
450
700
°C

Geometry LU-shield-W-L-H-T

W: Width
L: Length
H: Height
T: Thickness

Material Specifications Laminations Ni or Si content
Laminations and Nickel content 0.5mm 48% (Ni)
Laminations and Silicon content 0.5mm <3.5% (Si)

Available Standard Geometries*

Order Code W L H T Type²
LU15-8-15-3-NiFe 15 8 15 3 Ni-Fe
LU15-8-15-3-SiFe 15 8 15 3 Si-Fe
LU15-13-15-3-NiFe 15 13 15 3 Ni-Fe
LU15-13-15-3-SiFe 15 13 15 3 Si-Fe
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

Geometry LU15-8-15-3

Geometry LU15-13-15-3

Geometry LU20-8-15-3

Geometry LU20-13-15-3

Geometry LU25-8-18-3

Geometry LU25-13-18-3