D-Sub Filter General information - connectors with ferrite-filter

Interference – Yesterdays problem!

In a fast developing technological environment the management of electromagnetic interference is becoming more challenging.
Therefore HARTING developed a range of filter solutions to help designers of electronic equipments to achieve the demanding goal of electromagnetic compatibility.
HARTING offers a wide range of solutions by the integration of a filter inside one of the most standard I/O ports on the market; the D-Sub.
From standard simple ferrite-filter solution to complex customized high performance filters, you will be able to find in the HARTING filter D-Sub range the adequate solution to protect your application from any introduction or radiation of noise through D-Sub port apertures.

Advantages
Wide range:

• 9, 15, 25 and 37 contact versions
• Various terminations such as solder buckets, straight and right angled solder pins
• A large range of accessories
• High performance (C-filter) as well as simple, quick and cost effective solutions (ferrite-filter)

Compatible with standard wave and lead-free reflow soldering (C-filter).
Same layout and shell dimensions as standard D-Sub connectors, no modification of PCB design necessary Elimination of ringing, crosstalk phenomenon thanks to specific multilayer PCB used in C-filter design.
Flexible filter structure allowing a wide range of customization:

• Filter value (even pin by pin approach)
• Pi-filter
• Dielectric withstanding and working voltage
• Specific ESD / lightening protection

HARTINGs broad Filter range

Ferrite block mounted directly on rear side of the D-Sub

Ferrite-filter
Ferrite-filter D-Subs providing a low level of filtering thanks to simple blocks of inductive ferrite attached to the back end of the connectors.
Providing a few dB attenuation only at high frequencies HARTING ferrite-filter D-Subs represent a cost effective solution in applications where the emission level is close to the limit.

4 layers PCB populated with SMT chip capacitors

C-filter

To address higher EMI disturbances HARTING propose a comprehensive range of C-filter D-Sub connectors. HARTING C-filter D-Sub integrates a patented 4 layer printed circuit board equipped with chip capacitors. This patented solution provides complete protection of the I/O port due to the filtering performance of the capacitors and the screening effect of the PCB. Further more the 4 layers PCB also limits the ability of interference to enter the equipment through the D-Sub aperture. Available in 4 standard filter values 47, 470, 1000 and 3900 pF HARTING C-filter D-Subs represent for all designers a smart filtering solution allowing replacement of a “defective” port by a filtered one without any change of the PCB design.

Filter adapter
To support engineers in the diagnosis of EMI disturbances HARTING has developed, in addition to its filter series a range of male/female filter D-Sub adapters.
These back-to-back adapters can be used as testing tools and replaced later on in production directly by a filtered D-Sub connector.


Harting - Top Industrial Connectors Electronic Connectors Manufacturer in German