Filter D-Sub Connector
| Materials |
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| Electrical |
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Capacitor values |
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Standard |
HDD |
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180pF +/-20% |
180pF +/-20% |
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370pF +/-20% |
370pF +/-20% |
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830pF +/-20% |
830pF +/-20% |
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1300pF +/-20% |
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Current
Standard 5A @ 20ºC.
HDD 3A @ 20ºC. |
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Working Voltage |
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Standard |
HDD |
| Standard |
100Vdc |
100Vdc |
| High |
100Vdc |
- |
| Ultra High |
200Vdc |
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Dielectric Withstand Voltage |
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Standard |
HDD |
| Standard |
424Vdc |
300Vdc |
Standard ( ) |
300Vdc |
- |
| High |
707Vdc |
- |
| Ultra High |
1500Vdc |
- |
| Ultra High ( & >1300pF) |
1000Vdc |
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Voltage surge |
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10/700µs |
Standard |
HDD |
| Standard |
300V |
- |
| High |
500V |
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Contact Resistance
Before use - max 10m 
After use -  R max 10m
Insulation Resistance - > 1 G @ 100Vdc | |
| Mechanical |
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Mating/unmating forces |
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No. of Contacts |
Standard |
HDD |
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<30N |
<50N |
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<50N |
<83N |
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<83N |
<110N |
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<123N |
<170N |
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<167N |
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Mechanical operations -
50 cycles
200 cycles
500 cycles | |
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| Environmental |
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Working temperature:
Standard D -25º to +105ºC
HDD -25 to +85ºC |
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Humidity - 40ºC/85% relative humidity | |
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| Types |
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180pF,
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370pF, |
830pF, |
1300pF | Adaptor, C-LC--Filter
Plug and socket solder bucket L--Filter
Plug and socket straight PC C--Filter
Plug and socket 90º PC (0.318") C-LC-Filter
Plug and socket 90º PC (0.350") C-L-LC-Filter
Plug and socket 90º PC (0.370") C-L-LC-Filter
Plug and socket 90º PC (0.370") C-L-LC-Filter
Plug and socket 90º PC (0.590") C--Filter
Dual port C Filter 90º PC (0.625")
Dual port C Filter 90º PC (0.750")
Filtered (mixed layout) D connectors
Ferrites for standard and High Density D connectors
EMI/RFI gasket connector shield
Hoods and accessories | |
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L, C, LC and filtered D Sub-miniature Connectors
Standard d-sub connectors can not guarantee protection from EMI/RFI, even when enclosed in shielded hoods. Filter d connectors and adaptors are an ideal solution to reduce or eliminate EMI. |
EMI is broadly defined as any unwanted electrical or electromagnetic energy that causes undesirable responses, degraded performance or failure in electronic equipment. Radio Frequency Interference (RFI) is a slightly more specific term often used interchangeably to describe the phenomenon. A filtered connector is widely recognized as the most effective point to filter noise either entering or exiting an EMI enclosure. Noise induced on a signal line within the box can be stripped off as it passes through the shielding enclosure, preventing radiation to adjacent equipment. Filtered connectors are also used to provide system immunity from external noise sources. Filters integrated into electronic connectors to achieve a reduction in conducted EMI have evolved over the years using a variety of elements and materials to achieve varying degrees of noise suppression. These filters are broadly identified as low-pass filters. A low-pass filter allows lower frequencies to pass through the filter with minimal reduction in signal strength, while attenuating signals with higher frequency. A filter element achieves this by essentially becoming a variable resistor connected between the signal lines and ground. The resistive value is inversely proportional to the frequency of the signal it is conducting. As the frequency increases, the resistance of the filter decreases, providing a lower impedance path to ground. The capacitors strip off the interfering noise from the signal as it passes through the filter device whilst diodes are used to clamp the voltage below a certain value, thereby protecting the electronic circuitry.
Filters can selectively attenuate specific frequency bands by introducing controlled impedance mismatches into the line. A low-pass filter effectively strips higher frequencies to ground while allowing desirable lower frequencies to pass through the filter. Filtered connectors are typically bi-directional, in that they can attenuate noise originating from either side of the filter, an important advantage when considering immunity.
Many different configurations of filters have been developed to address a variety of circuit requirements. The simplest design is the C or feed-through filter which consists of a single capacitor inserted between the signal line and ground. As the conducted signal frequency increases, the effective resistance of the capacitor decreases, and therefore shunting higher frequencies to ground. The result is a filter that passes lower frequencies while attenuating higher frequencies.... more
CONEC has developed a series of EMI-filtered connectors that provide near linear performance up to 1GHz and beyond. The EMI-filtered D-subminiature connector series features a proprietary ceramic planar that provides a higher linear performance with better insertion loss yet remains competitively priced with the 'chip cap' types. Traditional filter connectors that function from 100 to 300MHz, used with on-board filter capacitors, cannot provide the same level of insertion loss, conserved board space, or reduced components count as these new EMI-filtered connectors.
Filtered d type connectors are available as solder bucket and straight or right angled PCB, in standard, high density and dual-port configurations.
Filtered, mixed layout d connectors are ideal for power line filtering. Their small size means that they can be installed directly onto the backplane, backpanel, or power supply cable. These connectors and Adaptors are UL and CSA approved.
Because of the wide range of configurations available (including waterproof IP 67), these connectors are built to order.
Because of the wide range of configurations available (including waterproof IP 67), these connectors are built to order.
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Features |
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L Filters- The L filter consists of one Capacitive element and one inductive element. This type of filter may be used with either a low impedance source and a high impedance load or a high impedance load. "L" ferrite filter connectors are ideal for applications where a small amount of filtering is required or the elimination of parasitic frequencies. "L" filter connectors are very cost effective."L" filter connectors are available in the standard D-subminiature format from 9 to 37 positions and in the high density format from 15 to 62 positions. |
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C Filters- "C" filter connectors are made with patented planar filter technology. Planar Arrays are extremely effective at filtering high-frequency interference. The C Filter is a low inductance, feed through capacitor. It is used to attenuate high frequency signals. For special filter requirements such as selective filters, other types of filters can be implemented. "C" filter connectors are available in the standard D-subminiature format of from 9 to 50 positions, and in high density format from 15 to 78 positions. |
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LC Filters- for certain applications it may be necessary to use ferrites and capacitance to achieve the filtering requirements. "LC" filter series of connectors increases the insertion loss by approx. 5 dB depending on the frequency range. The ferrite block is attached externally to the connector contacts. The attachment of the ferrite block does not change the physical size of the connector. |
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Filters- using planar technology these connectors offer an insertion loss of 45dB at 100 MHz and as high as 90dB at higher frequencies. PI filter connectors can be implemented where high performance in high frequency applications is required. PI filter connectors utilise two patented planar filters and one inductive element. The PI filters provide low impedance at the source and the load. PI filter connectors provide better performance if compared to C or L type filters. PI filters are available in adapter, right angle, PC and solder cup configurations. |
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Footprints, board fixings and accessories as per standard or High Density D connectors. |
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Versions available with Dielectric Withstand Voltage of up to 1500 Vdc. |
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Filtered mixed layout styles available
Popular versions such as 2W2C, 3W3, 3W3C and 5W5 are available with totally integrated capacitance filters.
The filter capacitance ranges from 1.3nF to 100nF on each contact position.
Contacts with current ratings from 10A to 40A are available with solder bucket, straight PC, 90º PC or Press Fit tails.
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MIL-DTL-24308 D-Subminiature filter connectors are designed to meet or exceed all applicable requirements of the military specification. The filter connectors are intermateable and interchangeable with standard non-filtered connectors from all quality connector manufacturers. |
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FURTHER INFORMATION |
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Need help choosing the right connector for your application? |
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Require detailed specifications, prices and availability? |
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