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Soft Ferromagnetic Shields

CTS offers a range of shield designs  for planar current sensing in combination with a magnetic field sensor, AMR sensor and a busbar conductor.

 

Series Resources

  • Data Sheet
  • ROHS
  • Reach Statement

What are Soft Ferromagnetic Shields?

Shields are additional components in a current sensor that protects the sensor from external magnetic field sources that disrup operations. Made up of soft ferromagnetic materials to help magnitise flux frequencies that are desired while blocking the frequencies that are not inside the sheild.

Some CTS sheild designs utilize laminated materials. Our lamination designs use stacks of tightly bonded materials like iron, effectively preventing external flux from disrupting current operations.

U-Shield

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 Hall sensor, AMR sensor and a busbar 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.

Laminated U-Shield

The U-Shield is a soft ferromagnetic shield featuring superior material characteristics such as high linearity and very low hysteresis. This design uses iron lamination to support harsher enviroments and making this particular shield more suitable for high-speed applications.

The shield is designed for planar current sensing in combination with a Hall sensor, AMR sensor and a busbar 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.


Product Options

Core Material Options

  • Nikel 48% 
  • Silicon <3.5%
  • Amorphous Iron
  • More Options with Customization

Laminate Options

  • Material: Iron 
  • Thickness: 0.35mm
  • More Options with Customization

Shield Specifications

Parameter Material Value
Relative Permeability Ni-Fe
Si-Fe
100'000 a.u.
40'000 a.u.
Initial Relative Permeability Ni-Fe
Si-Fe
7000 a.u.
2500 a.u.
Saturation Flux Density Ni-Fe
Si-Fe
1 T
1.5 T
Hysteresis  Ni-Fe
Si-Fe
2.8 A/m
n/a 
Curie Temperature Ni-Fe
Si-Fe
450°C
700°C

Example Dimensions

Parameter Value
Width 12 - 25mm
Length 13 - 26mm
Height 12 - 15mm
Thickness 0.8 - 1.5mm
Lamination Thickness 0.5 - 1.5mm

An image of shield with dimensions listed by letters

  • Features
  • Applications
  • Technical Resources

 

Image of a shield protecting a sensor on a PCB board

  • Designed for high-speed contactless current sensing
  • Designed for high linearity and low hysteresis
  • Soft ferromagnetic materials
  • Enhances sensitivity and signal-to-offset ratio of the sensor 
  • Protects the sensor from parasitic magnetic
    fields caused by nearby magnetic field sources
  • Many Shapes and Sizes
  • Mounting with pins, SMD, screw, or crimping assemblies
  • Laminated and amorphous shields

Current Sensors

Advanced Sensing Modules

Custom Electrified Systems

Automotive and Industrial Electrical Systems

Battery Monitoring

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CTS Clamp-On Current Sensors for Preventive Maintenance

The clamp-on current sensors from CTS Corporation offer an easily installable means of current measurement for applications in the low-to-mid current range. Available as either magnetic field concentrators or full sensor modules, these products are ideal for current monitoring and preventive maintenance for countless industrial systems.

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Collaborate With A Custom Product Expert

CTS can design and deliver products that meet the unique requirements of your project. Work with a technical expert to begin your design today.

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Busbar Mount Current Sensors

CTS designs and manufactures busbar current sensors with accurate monitoring, enhanced safety and efficient power distribution.

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Clamp-On Current Sensors

The CO-04-SF and CO-10-SF magnetic field concentrators and clamp on sensors are designed for non-intrusive and isolated measurements of electric currents.

Critical Sensing Systems

CTS's sensing modules for complex applications. Best used to monitor multiple parameters essential for ensuring safe, long-lasting operation.

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PCB Mount Current Sensors

CTS develops PCB mount current sensors designed to measure the electrical current flowing through a printed circuit board (PCB) or a specific part of an electrical circuit.