U-shields

Product Description

The U-Shield is a soft ferromagnetic shield featuring superior material characteristics such as high linearity and very low hysteresis.

The shield is designed for planar current sensing in combination with a magnetic field sensor, i.e. Hall sensor, AMR sensor and a bus-bar conductor.

The "U" 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.

PML collaborates for current sensor applications with Maglab GmbH (For design optimization & simulation) and Melexis GmbH (Qualified automotive sensor supplier).

Magnetic Characteristics

Magnetic Characteristics of U-shields
Parameter Typical Value Unit
Relative Permeability 100,000 a.u.
Initial Relative Permeability 7000 a.u.
Saturation Flux Density 1 T
Hysteresis 2.8 A/m
Curie Temperature 450 ºC

Geometry

U-shield_geometry

Order Code:U-shield - Width [W]  - Length [L]  - Height [H]  - Thickness [T]

Standard Sizes

All dimensions are in mm

Standard Sizes of U-shields
Product Code Width [mm] Length [mm] Height [mm] Thickness [mm]
U9 9 5 7.8 0.8
U9.9 9.9 15.8 19 0.8
U12 12 10 - 13 12.5 0.8
U15.875 15.875 21 24.8 0.8
U16 16 13 - 15 15 - 24.8 0.8
U18 18 13 20.8 0.8
U19 19 15 20.8 0.8
U15 15 12 - 22 11 - 17 1
U16.5 16.5 18 15 1
U21 21 12 16.7 1
U22 22 12 13.5 1
U24.5 24.5 16 11 1
U25 25 12 19 1
U27 27 15 21 1
U12 12 12 - 13 12.5 1.5
U16 16 10 - 12 19 - 29 1.5
U20 20 15 12.5 1.5
U20.5 20.5 10 10 1.5
U24 24 15 17 1.5
U25 25 12 - 19 14.5 - 26 1.5
U36 36 14 11 1.5
U37 37 15 40.3 1.5
U40 40 12 17 1.5
U63.2 63.2 15 42.8 1.5
U31 31 15 19.3 2
U44.1 44.1 12 17.7 2

Note: For particular W & T combination, L & H can be varied. Inquiries for specific dimensions are welcome.