IEC 61754-2-1996 PDF

Full title and description

Fibre optic connector interfaces - Part 2: Type BFOC/2,5 connector family. Defines the standard interface dimensions for the Type BFOC/2,5 family of single-position plug connectors characterized by a 2.5 mm nominal ferrule diameter.

Abstract

This document specifies the mechanical interface dimensions, tolerances and mating interface definitions for the BFOC/2,5 connector family so that components from different manufacturers are mechanically interoperable. It is an interface standard (mechanical/dimensional) rather than a performance test standard; normative references and related IEC documents address optical and ferrule requirements. Note: a technical revision (second edition) was issued as a pre-release FDIS in 2026 and introduces updates such as additional clauses, active-device receptacle interfaces and harmonised references to ferrule/end-face standards.

General information

• Status: Published (first edition 1996). A second edition (IEC 61754-2:2026) was circulated as a pre-release FDIS in early 2026 and will replace the 1996 edition when published.
• Publication date: 12 December 1996 (first edition).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 33.180.20 Fibre optic interconnecting devices.
• Edition / version: Edition 1.0 (1996). Second edition in development / pre-release FDIS (2026) as of early 2026.
• Number of pages: 19 pages (first edition PDF/print).

Scope

The standard establishes the dimensional interface between plugs, receptacles and adaptors for the Type BFOC/2,5 family (nominal 2.5 mm ferrule). It covers mechanical drawings, critical reference dimensions, tolerances and mating references necessary for interchangeability of single-position ferrule-style connectors. It does not itself define optical performance tests or detailed ferrule end-face geometry beyond the interface relationships; those topics are handled in complementary IEC documents and referenced standards. The upcoming 2026 edition explicitly adds active-device receptacle interfaces and aligns ferrule/end-face references with the IEC 61755-3 and IEC 63267-3 series.

Key topics and requirements

• Definition of the BFOC/2,5 connector family interface dimensions and tolerances to ensure mechanical interchangeability.
• Specification of plug and adaptor mating interfaces (reference dimensions and alignment sleeve/rigid bore features).
• Nominal ferrule diameter: 2.5 mm; dimensional references for ferrule location and axial/ radial alignment.
• Normative references to related IEC documents for ferrule grades, end-face geometry and optical interface definitions (cross-referenced in later revisions).
• Clear distinction between interface (dimensional) requirements and separate performance or optical test standards.

Typical use and users

Used by connector and adapter manufacturers, mechanical designers of fibre‑optic interconnect hardware, standards committees, test laboratories and procurement/specification engineers who need assured mechanical compatibility between single‑position 2.5 mm ferrule connectors from different suppliers. It is primarily consulted when designing mating interfaces, adaptors or when creating product drawings that must conform to a recognised international interface standard.

Related standards

EN 61754-2:1997 (identical European adoption), other parts of the IEC 61754 series (connector interfaces), IEC 61755 series (ferrule grades/end-face), and later related documents such as IEC 63267 series referenced in the 2026 revision. National adoptions and identical standards (e.g., BS/EN/UNE adoptions) follow from the IEC base document.

Keywords

Fibre optic connectors, BFOC, 2.5 mm ferrule, connector interfaces, IEC 61754-2, mechanical interchangeability, adaptor, alignment sleeve.

FAQ

Q: What is this standard?

A: IEC 61754-2:1996 is an international interface standard that specifies the mechanical/dimensional interface for the Type BFOC/2,5 family of single‑position fibre optic connectors (nominal 2.5 mm ferrule diameter).

Q: What does it cover?

A: It covers interface drawings, reference dimensions and tolerances for plugs, receptacles and adaptors in the BFOC/2,5 family to ensure mechanical interoperability. It does not itself set optical performance tests — those are in complementary IEC documents.

Q: Who typically uses it?

A: Connector and adaptor manufacturers, design engineers, standards bodies, test labs and purchasing/specification teams who need defined mechanical interfaces for fibre‑optic components.

Q: Is it current or superseded?

A: The 1996 first edition is the published base document; as of early 2026 a second edition (IEC 61754-2:2026) was issued in pre-release (FDIS) and is intended to cancel and replace the 1996 edition once the new edition is published and becomes effective. Check the IEC webstore or national standards body announcements for the exact publication date of the 2026 edition and the formal supersession status.

Q: Is it part of a series?

A: Yes — IEC 61754 is a multipart series covering mechanical interface definitions for different fibre‑optic connector families; Part 2 covers the BFOC/2,5 family specifically.

Q: What are the key keywords?

A: BFOC, 2.5 mm ferrule, fibre optic connector interfaces, mechanical dimensions, adaptor, alignment sleeve, IEC 61754-2.