IEC 61300-2-18:2023

Overview

IEC 61300-2-18:2023 specifies a standardized dry heat (high temperature endurance) test for fibre optic interconnecting devices and passive components. The procedure determines whether connectors, splices, closures and passive modules can withstand extended exposure to constant high temperature encountered during operation, storage or transport. This third edition (2023) updates terms and test severities to align with IEC 61753-1:2018 and simplifies temperature/exposure time combinations.

Key topics and requirements

• Scope: Verifies endurance to sustained heat; it is not a thermal-cycling test (see IEC 61300-2-22 for temperature variation testing).
• Test method: Specimens are placed in an environmental chamber and held at a specified constant temperature for a defined exposure time (conditioning → recovery → final examination).
• Apparatus: Environmental test chamber per IEC 60068-2-2 (test Bb); optical source and detector equipment for monitoring attenuation/return loss per IEC 61300-3-3 / IEC 61300-3-4.
• Measurements: Initial and final measurements and, where required, continuous or periodic monitoring of attenuation and return loss (recommended max 1 h intervals for performance tests).
• Preconditioning & recovery: Clean and stabilize specimens per IEC 61300-1, maintain at standard atmospheric conditions before and after test (minimum recovery ~2 h).
• Visual inspection: Final visual examinations per IEC 61300-3-1 to detect softening, expansion, damage to cables, seals, strain reliefs, or displaced/broken parts.
• Severity levels: Test severities defined by performance categories and aligned with IEC 61753-1. Examples from Table 1 include C: +60 °C / 96 h, OP: +70 °C / 96 h, E: +85 °C / 96 h - consult IEC 61753-1 for full normative values.

Applications and users

Who uses IEC 61300-2-18:2023:

• Manufacturers of fibre optic connectors, adapters, splices, closures and passive components for product qualification and design validation.
• Environmental and reliability test laboratories performing standardized endurance testing.
• Quality, procurement and compliance engineers specifying acceptance criteria for telecom, datacom, and industrial optical components. Practical uses:
• Assessing long-term thermal reliability of components used in cabinets, outdoor enclosures, or high-temperature storage/transport environments.
• Supporting product specifications, supplier qualification, and failure analysis related to heat-induced softening or expansion.

Related standards

• IEC 60068-2-2 (Dry heat environmental chamber)
• IEC 61300-1, 61300-3-1, 61300-3-3, 61300-3-4 (general test guidance and measurement methods)
• IEC 61300-2-22 (temperature variation testing)
• IEC 61753-1:2018 (performance categories and severities)
• IEC TR 62627-01 (connector cleaning guidance)

For conformance and detailed test parameters, consult the full IEC 61300-2-18:2023 document and referenced IEC performance standards.