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Choosing the Right Capacitance for Your Filter Connector

Amphenol

Amphenol Canada Corp. a subsidiary of Amphenol Corporation,

is an international leader in the manufacture of Filtered

Connectors and Specialty Interconnect Devices, and has been

pioneering EMI and EMP technologies for more than 40 years.

Located in Toronto, Canada, our ISO 9001 certified facility

employs approximately 400 people. Our activities are dedicated

to the design, development and manufacture of EMI/EMP filter

connector products which are used in Commercial, Industrial,

Communications, Military and Aerospace applications world-

wide. Our expertise in understanding and supporting our cus-

tomers’ filter interconnect needs has earned Amphenol Canada a

reputation of quality and excellence among the world’s leading

users of electronic components.

Nominal Insertion Loss values described in this catalog are

based on the Mil-STD-220 test method - a 50 ohm balanced load

and source impedance. Different systems will differ from this and

hence, the filter connector may perform differently.

The final decision will be determined from actual EMI/RFI

testing of the equipment in question.

(1)Determine the highest frequency that the filter connector

needs to pass unaffected.

(2)Which frequencies are causing trouble, either with

emissions or with immunity to interference?

(3)Scan the Insertion Loss charts on page 2 to select a filter

which provides little or no insertion loss (filtering) at the

frequency determined from step 1, yet gives the greatest

possible insertion loss at the frequencies determined in step 2.

A filtered connector is the combination of filter elements in a

connector, forming one neat, compact interconnect device that

can filter unwanted EMI. The most popular configuration is when

capacitors are mounted inside the connector between each of

the contacts and the connector ground shell.

What is a Filtered Connector?

Benefits

Better EMI Control – With minimized lead inductances and

short, direct paths to ground of the filter, performance

will typically out perform the same filter components on

a P.C.B. by a factor of three to one.

PCB Space Savings – Incorporating filter elements into the

connector, enables simplification of the required filter

schematic for the necessary performance plus a savings

of 2-4 square inches.

Cost Savings – Filter elements, such as inductors and capaci-

tors, must no longer be purchased, stocked, assembled

or tested. Fewer components means greater reliability at

lower cost.

Easy EMI/RFI Upgrade – These compact filtered connectors

fit standard non-filtered connector footprints. For

improved EMC performance, simply replace the existing

connector with a filtered connector.

EMC Compliance & Immunity – EMI that is generated

from the electronic device, radiated or conducted, will

be re-directed to chassis ground through the connector

shell. This same device will also protect the system from

external EMI/RFI noise (such as radio transmitters, ESD,

or natural phenomena such as lightning) in the same way.

The Company

2536 Amphenol FCC.V6 9/21/01 10:48 AM Page cov4

Summary of content (9 pages)

PAGE 1
2536 Amphenol FCC.V6 9/21/01 10:48 AM Page cov4 Amphenol ® The Company Amphenol Canada Corp. a subsidiary of Amphenol Corporation, is an international leader in the manufacture of Filtered Connectors and Specialty Interconnect Devices, and has been pioneering EMI and EMP technologies for more than 40 years. Located in Toronto, Canada, our ISO 9001 certified facility employs approximately 400 people.
PAGE 2
536 Amphenol FCC.V6 9/21/01 10:48 AM Page 2 FCC17 & FCC57 Series ELECTRICAL DATA Contact Resistance: 15 milliohms maximum per MIL-STD-1344 Method 3002 Insulation Resistance: 3000 megohms minimum per MIL-STD-1344 Method 3003.1 Current Rating: 5 Amps DC maximum 2 Amps RF filtering maximum FCC17 Combo: 20-40 Amps Filter Performance: Filter Capacitance (pF) @25°C, 1 kHz, 1.0 VRMS Dielectric Material: NPO or X7R Insertion Loss (dB) (per MIL-STD-220 @ .
PAGE 3
2536 Amphenol FCC.V6 9/21/01 10:48 AM Page 3 FCC17 & FCC57 Series MECHANICAL DATA FCC17 Series Construction Stamped steel shell plated per MIL-T-10727 Low impedance chip capacitor Gold plated phosphor bronze contact with integral High strength contact spring thermoplastic insert Mounting hole (threaded or through hole) Board lock device FCC17 & FCC57 Mechanical & Environmental Data ENVIRONMENTAL MATERIALS FCC17 Shell Stamped Steel; Tin Plated Contacts Phosphor Bronze; 15µ inches [0.
PAGE 4
2536 Amphenol FCC.V6 9/21/01 10:49 AM Page 5 FCC17 Series FILTERED D-SUB CONNECTORS Specifications Filter Characteristics: Electrical Data: Material and Finishes: Environmental Data: UL File # : CSA File # : See Page 2 See Page 2 See Page 3 See Page 3 E135615 LR68598 These products are protected by U.S.
PAGE 5
2536 Amphenol FCC.V6 9/21/01 10:49 AM Page 6 FCC17 Series FILTERED D-SUB CONNECTORS Pin Socket FRONT VIEW END VIEW FRONT VIEW All Dimensions in Inches (mm) Shell Size E A B C Standard Number of Contacts 9 15 25 37 A B 1.213 [30.81] 1.541 [39.14] 2.088 [53.04] 2.729 [69.32] .984 [24.99] 1.312 [33.32] 1.852 [47.04] 2.500 [63.50] C (for pin connector) .666 [16.92] .994 [25.25] 1.534 [38.96] 2.182 [55.42] D (for socket connector) .643 [16.33] .971 [24.66] 1.511 [38.38] 2.159 [54.
PAGE 6
2536 Amphenol FCC.V6 9/21/01 10:49 AM Page 7 FCC17 Series FILTERED D-SUB CONNECTORS Vertical Mount Termination Type E Termination Type N Right Angle, with Boardlocks & Plastic Mounting Brackets .318" FOOTPRINT Termination Type A with Modifier option O .405" FOOTPRINT .590" FOOTPRINT Termination Type B with Modifier option O Termination Type C with Modifier option O Right Angle, with Metal Mounting Brackets .318" FOOTPRINT Termination Type A with Modifier option B .
PAGE 7
2536 Amphenol FCC.V6 9/21/01 10:49 AM Page 8 FCC17 Series FILTERED D-SUB CONNECTORS Solder Cup Termination Termination type M SIDE VIEW END VIEW SOLDER CUP DETAIL (ACCEPTS UP TO 20 AWG WIRE) Pin-to-Socket Adapter Termination type D Mounting Options Through Hole with Mounting Post 4-40 Threaded Inserts Part No. Example FCC17-B25AD-2x0 FCC17-B25AD-4x0 x = To complete the P/N, see page 5 to assign Filter Capacitance Code. For electrical and mechanical specifications, see pages 2 and 3.
PAGE 8
2536 Amphenol FCC.V6 9/21/01 10:49 AM Page 9 FCC17 Series FILTERED D-SUB CONNECTORS Mounting Options (on Flange) Shown for Vertical Mount Connectors. Codes 2, 3, 4, 6, E and F also available on right angle connectors. -Axx 4-40 Threaded Standoffs with Boardlocks (Vertical Mount only) Mounting code A -2xx .120" (3.
PAGE 9
2536 Amphenol FCC.V6 9/21/01 10:49 AM Page 10 FCC17 Series FILTERED D-SUB CONNECTORS PCB Layout 9 SIZE Standard PCB layout PCB layout for .590" footprint with Modifier Options B or D only Standard PCB layout PCB layout for .590" footprint with Modifier Options B or D only 15 SIZE 25 SIZE Standard PCB layout PCB layout for .590" footprint with Modifier Options B or D only 37 SIZE Standard PCB layout 10 PCB layout for .590" footprint with Modifier Options B or D only Amphenol® Canada Corp.