EN 3155-001:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Elektrische Kontakte zur Verwendung in Verbindungselementen - Teil 001: Technische LieferbedingungenSérie aérospatiale - Contacts électriques utilisés dans les organes de connexion - Partie 001: Spécification techniqueAerospace series - Electrical contacts used in elements of connection - Part 001: Technical specification49.060Aerospace electric equipment and systemsICS:Ta slovenski standard je istoveten z:EN 3155-001:2009SIST EN 3155-001:2009en01-maj-2009SIST EN 3155-001:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 3155-001February 2009ICS 49.060 English VersionAerospace series - Electrical contacts used in elements ofconnection - Part 001: Technical specificationSérie aérospatiale - Contacts électriques utilisés dans lesorganes de connexion - Partie 001: Spécification techniqueLuft- und Raumfahrt - Elektrische Kontakte zur Verwendungin Verbindungselementen - Teil 001: TechnischeLieferbedingungenThis European Standard was approved by CEN on 21 June 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3155-001:2009: ESIST EN 3155-001:2009

Symbols of contact sizes in contact arrangement drawings . 33 SIST EN 3155-001:2009

documentation ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection ISO 4524-1, Metallic coatings — Test methods for electrodeposited gold and gold alloy coatings — Part 1: Determination of coating thickness ISO 4524-5, Metallic coatings — Test methods for electrodeposited gold and gold alloy coatings — Part 5: Adhesion tests ISO 8843, Aircraft — Crimp-removable contacts for electrical connectors — Identification system
* All parts quoted in Table 2. 1) Published as ASD Prestandard at the date of publication of this standard. 2) Published by International Electrotechnical Commission (IEC), 3 rue de Varembé, 1211 Geneva 20, Switzerland.
Key 1 Centre contact 2 Outer contact Figure 1 3.4 triaxial contacts male or female assembly of three contacts arranged coaxially, enabling the connection of shielded triaxial or bifilar cables See Figure 2. NOTE 1 Male triaxial contact where the outer contact is male;the central contact(s) may be male or female. NOTE 2 Female triaxial contact where the outer contact isfemale; the central contact(s) may be male or female.
Key 1 Centre contact 2 Intermediate contact 3 Outer contact Figure 2 SIST EN 3155-001:2009

Key 1 Twin parallel contacts 2 Outer contact Figure 3 3.6 quadrax contact assembly of five contacts, four of which are parallel, the fifth being peripheral to these, enabling the connection of shielded quadrax cables See Figure 4.
Key 1 Four parallel contacts 2 Outer contact Figure 4 4 Conditions of use 4.1 Types of contact The contact specified shall be one of the following types:  Type A: contact for general application;  Type C: contact for thermocouple;  Type D: contact with screening feature (including the coaxial contacts, triaxial contacts and bifilar contacts). These have no characteristic impedance and are therefore not recommended for use at high frequency.  Type E: contact with screening feature, including coaxial, triaxial, bifilar and quadrax contacts. These have matched impedance. NOTE Non-removable contacts are defined in the connector specifications. 4.2 Temperature classes The contacts specified shall be from one of the classes specified below: SIST EN 3155-001:2009

This standard covers male and female contacts of all types and technologies: cylindrical or rectangular entry contacts, flat contacts of the blade type, etc., stamped, formed or machined contacts. 5.1.2 Mating end of female contact, cylindrical contacts Unless otherwise stated in the product standard, the mating end of female contacts from size 12 to 24, shall be of the restricted entry type and shall not permit the introduction of a gauge which has a diameter 0,13 mm greater than the maximum diameter of the male contact. 5.1.3 Mating end of male contacts, cylindrical contacts Unless otherwise stated in the product standard, the mating end of the male contacts shall be approximately spherical. A flat is permitted at the end; its dimensions are given in Table 1.
Table 1 Contact size Contact diameter Diameter of flat at the end Contact size Contact diameter Diameter of flat at the end mm mm mm mm
28 a
0,394 0,368 0,19 max. 10 3,20 3,15 2,08 1,57
26 a 0,521 0,495 0,25 max. 8 3,63 3,58 2,18 1,68
24 a 0,648 0,622 0,30 max. 6 4,55 4,50 2,44 1,93 22 0,775 0,750 0,35 max. 4 5,74 5,69 2,79 2,29 20 1,04 0,99 0,51 0,13 2 7,21 7,16 4,27 3,76 16 1,61 1,56 0,81 0,43 0 9,09 9,04 6,15 5,64 14 2,01 1,96 0,99 0,61 2/0 10,34 10,29 7,39 6,88 12 2,41 2,36 1,57 1,19 4/0 12,72 12,67 9,80 9,27 a Inner contact of type D or type E.
5.1.4 Solder buckets The buckets shall be designed so that during soft soldering operations, the liquid solder cannot run towards the end of the contact. 5.1.5 Crimp barrels Barrels shall be designed to accept the range of permissible conductors according to ISO 8843. The use of a reducing sleeve is not recommended; this remains the responsibility of the user and shall be subject to acceptance by the relevant authorities. 5.1.6 Terminations for wrapped connections The terminations for wrapped connections shall comply with IEC 60352-1. 5.1.7 Surface roughness (see ISO 1302) The surface roughness after coating in the male contact zone shall not exceed Ra = 0,8 µm (or N6); in the other zones, it shall not exceed Ra = 1,6 µm (or N7). SIST EN 3155-001:2009

The protective coating may be either uniform over the entire surface of the contact, or it may be selective. The protection shall be thicker in the contact active areas. The minimum thickness of protection for active areas may or may not be specified in the product standard. The entire contact shall have an appropriate undercoat (silver undercoat is prohibited), with the exception of fittings or retaining features such as springs or spring clips which may be made of a corrosion resisting material. 5.3.2 Uniform protection The entire surface of the contacts shall be protected in accordance with the requirements of each product standard. 5.3.3 Selective protection If required by the product standard, selective plating shall be applied as shown in Figures 1 to 8, depending on the particular case. Protection shall be complete in contact active areas X and Y. In the other zones, the thickness of the protections is not generally specified. Outside contact active areas X and Y, a change in colour of the gold plating is not a reason for rejection. SIST EN 3155-001:2009

Key 1 Male contact of maximum diameter 2 Contact active area X (internal diameter) 3 Clip 4 Contact active area X 5 Point of electrical contact Figure 5 — Female contact with integral contact pressure element
Key 1 Contact active area X Figure 6 — Female contact with separate pressure elements
Key 1 Contact active area Y Figure 7 — Male contact SIST EN 3155-001:2009

Key 1 Point of electrical contact 2 Contact active area X Figure 8 — Tuning fork contact
Key 1 Contact active area Y
Figure 9 — Blade contact
Key 1 Contact active area Y Figure 10 — Male contact, coaxial Key 1 Contact active area X Figure 11 — Female contact, coaxial
Key 1 Contact active area Y Figure 12 — Male contact, triaxial
Key 1 Contact active area X Figure 13 — Female contact, triaxial
Key 1 Contact active area Y Figure 14 — Male contact, quadrax
Key 1 Contact active area X Figure 15 — Female contact, quadrax
6 Dimensions and mass The dimensions of the contacts and their mass are defined in the product standard. 7 Operation The tools for connecting and installing the contacts are defined in the product standard. 8 Tests See Table 2. All the tests are carried out without elements of connection, with the exception of tests EN 2591-402, EN 2591-403, EN 2591-406 and EN 2591-415. SIST EN 3155-001:2009

– Type A, D and E contacts Unless otherwise specified in the product standard, the contact resistance shall not exceed the maximum values given below (in mΩ).
Contact size Type A
Initially After
tests
≤ 24
– a
– a
22 8 11
20 5 7
a To be specified in the product standard.
The contact resistance values for type D and E shall be specified in the product standard. 202 Contact resistance at rated current Applicable to type A, D and E contacts.
– Type A, D and E contacts Unless otherwise specified in the product standard, the contact resistance shall not exceed the maximum values given below (in mΩ).
Type A
Contact size At ambient temperature At high temperature
Initially After tests Class P125 °C Class R150 °C Class S 200 °C Class T 260 °C Class U350 °C
– a
– a
– a
– a
– a
– a
– a
22 8 11 12 12,8 13,6 14,4
– a
20 5 7 7,5 8 8,5 9
– a
16 3 5 4,5 4,8 5,1 5,4
– a
≥ 12 2 3 3 3,2 3,4 3,6
– a
a To be specified in the product standard.
Type D and E The contact resistance values shall be specified in the product standard. continued SIST EN 3155-001:2009

Contact size Current A Duration s Contact size Current A Duration s
28 Not applicable 10 66 330 40 0,6
26 Not applicable 8 92 460 40 0,6
24 5 25 40 0,6 6 120 600 40 0,6
22 10 50 40 0,6 4 160 800 40 0,6
20 15 75 40 0,6 2 200 1 000 40 0,6
16 26 130 40 0,6 0 300 1 500 40 0,6
14 36 180 40 0,6 2/0 370 1 850 40 0,6
12 46 230 40 0,6 4/0 450 2 250 40 0,6
Other types of contacts: in accordance with the product standard. continued SIST EN 3155-001:2009
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