SMD Common Mode Chokes STS

The STS Series SMD Power Line Common Mode Chokes are compact surface-mount components designed for effective suppression of conducted EMI on power lines. This page focuses exclusively on the STS series, which has been independently separated from the legacy product range to improve product clarity, application targeting, and SEO performance on the new Ferrtx website.

As a dedicated solution within SMD Common Mode Chokes, the STS series is optimized for power-line noise filtering in space-constrained electronic systems.

Understanding Types of Chokes in EMI Filtering

When selecting EMI suppression components, understanding the types of chokes is essential. Common categories include:

• Common Mode Chokes – Suppress noise flowing in the same direction on multiple conductors

• Differential Mode Chokes – Target noise between signal lines

• Power Line Common Mode Choke – Specifically designed for AC or DC power inputs

The Common Mode Chokes STS series belongs to the SMD Power Line Common Mode Chokes category, offering efficient common-mode noise attenuation while maintaining low loss for normal operating currents.

STS Series Common Mode Choke Operation

The Common Mode Choke Operation of the STS series is based on magnetic flux cancellation principles:

• Differential currents generate opposing flux, resulting in minimal impedance

• Common-mode noise currents reinforce magnetic flux, creating high impedance

• High-frequency noise is effectively suppressed without affecting power delivery

This makes STS chokes a core building block in EMI Filter designs for power electronics.

Key Features of STS SMD Common Mode Chokes

• Surface-Mount Design (SMD)
  Suitable for automated PCB assembly and high-density layouts.

• Optimized for Power Lines
  Designed specifically as SMD Power Line Common Mode Chokes.

• High Common-Mode Impedance
  Effective suppression across a wide frequency spectrum.

• Low DC Resistance
  Minimizes power loss and heat generation.

• Stable Electrical Performance
  Reliable operation under continuous load conditions.

These characteristics allow STS chokes to complement other EMI solutions such as Power Line Filters and ferrite bead inductor components.

Applications of STS Common Mode Chokes

The STS Series SMD Common Mode Chokes are widely applied in:

• AC-DC power supplies

• DC-DC converter modules

• Industrial power systems

• Consumer electronics

• Embedded control units

They are often integrated with SMD Common Mode Chokes and Power Line Common Mode Choke solutions to meet EMC compliance requirements.

Advantages of STS Series vs General SMD Chokes

Compared with generic common mode chokes, the STS series offers:

• Enhanced performance for power-line EMI suppression

• Compact footprint for modern PCB designs

• Improved consistency for mass production

• Flexible customization options

This makes STS an ideal choice for power-focused Emi Filter architectures.

Custom STS Common Mode Choke Solutions

Ferrtx supports customization of Common Mode Chokes STS, including:

• Inductance and impedance adjustment

• Current and voltage rating optimization

• Mechanical size and footprint customization

• Application-specific EMI targets

Engineering support is available from prototype development to volume production.

Why Choose FERRTX STS SMD Power Line Common Mode Chokes?

• Independent STS series classification for accurate product selection

• Clear differentiation among Types of Chokes

• Proven common-mode suppression performance

• Strong technical support and customization capability

FERRTX STS Series SMD Power Line Common Mode Chokes provide reliable EMI suppression for modern power electronics requiring compact size, efficiency, and regulatory compliance.