ISO 5866:1983 PDF

Name: ISO 5866:1983 — Aircraft — 2 and 3A plug-in base change-over relays, Type II, with crimped connections — Clearance and fixing dimensions
SKU: ISO 5866:1983
Price: 25 EUR
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Aircraft — 2 and 3A plug-in base change-over relays, Type II, with crimped connections — Clearance and fixing dimensions

Название (английский):

ISO 5866:1983

Aircraft — 2 and 3A plug-in base change-over relays, Type II, with crimped connections — Clearance and fixing dimensions

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 7
Дата публикации:: 1 ноября 1983 г.
Издание:: ISO IS 5866 edition 1 version 1
ICS:: 49.060

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Описание (английский):

Lays down the dimensions and specifies the fixing and the designations of these relays. The characteristics and performance requirements will be specified in forthcoming International Standards. Includes definition, dimensions of two pole and four pole relays, arrangement of terminals of bases and dimensions after coupling the contacts, holes in the support, connections for crimping and designation.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 5866:1983 specifies clearance and fixing dimensions and the designation rules for aircraft plug-in base change-over relays (Type II) with crimped connections. It defines the mechanical envelope, base and support hole layouts, terminal arrangements and connector details for 2 A (two-pole) and 3 A (two- and four-pole) plug-in relays intended for aircraft applications. Note: electrical characteristics and performance requirements are to be covered in separate, forthcoming International Standards.

Key topics and technical requirements

Scope: Dimensions, fixing details and designation of Type II plug-in change-over relays with crimped connections for aircraft use.

Relay configurations covered:

2 A two-pole change-over relays
3 A two-pole and 3 A four-pole change-over relays

Mechanical variants: Relays with and without a mechanical protection device for connections - separate dimensional figures and tables are provided for each.

Base and terminal arrangement:

Two‑pole bases use 8 holes, four‑pole bases use 16 holes; minimum hole depth 5 mm for male contacts.
Position and concentricity tolerances for base holes must be compatible with relay pin tolerances to ensure correct mounting.

Contact dimensions: Male and female contact geometries and electrical contact zone dimensions are defined (figures provided in the standard).

Connections for crimping: Rear part of crimp contacts accommodates wires with cross-sectional areas 0.22 mm² to 0.60 mm² (insulated wire sizes equivalent to AWG 20–24).

Marking and designation: All connections must be marked on the relay base; at least one coil connection must be identified, polarity indicated with a “+” if needed; operating diagram and contact locations must be indelibly marked.

Referenced tolerancing practice: Geometrical tolerancing and drawing conventions follow ISO 1101.

Practical applications and users

ISO 5866:1983 is primarily useful for:

Aerospace component designers and mechanical engineers specifying relay envelopes and mounting interfaces in avionics and aircraft electrical systems.

OEMs and relay manufacturers producing plug-in change-over relays compatible with established aircraft bases and supports.

Avionics assemblers, maintenance organizations and procurement/specification teams ensuring mechanical interchangeability and correct connector interfaces.

Test labs and quality teams verifying dimensional conformity and marking requirements during incoming inspection.

Practical benefits include improved interchangeability, reduced mechanical integration risk, and clearer procurement specifications for aircraft-grade relays.

Related standards

ISO 1101 (geometrical tolerancing) - referenced for drawing tolerances.

Future ISO standards (forthcoming) will specify electrical characteristics and performance requirements for these relay types.

Keywords: ISO 5866:1983, aircraft relays, plug-in base relays, change-over relays, crimped connections, relay dimensions, fixing dimensions, terminal arrangement, avionics.

ISO 5866:1983 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and users

Related standards

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