Breaking the Thermal Barrier: OFSCN® 120°C, 200°C, and 300°C High-Temperature Fiber Optic Connector Series Comparison and Selection Guide

In harsh environments such as industrial monitoring, aerospace, oil and gas exploration, and geothermal sensing, the connector's temperature resistance is the weakest link determining the stability of the entire fiber optic link. Standard commercial connectors quickly fail when temperatures exceed 85°C due to the degradation of internal materials like epoxy resins and plastic components.

[Beijing Dacheng Yongsheng Technology Co., Ltd. (DCYS)] offers a full series of high-temperature fiber optic connectors. Through innovative heat-resistant materials and bonding technologies, we raise the performance ceiling of fiber optic connectors to 300°C, ensuring your optical signal remains stable and reliable under extreme temperatures.

I. Core Comparison: Engineering Differences in Connectors Across Temperature Grades

The fundamental difference between connectors of varying temperature grades lies in material science and thermal stress resistance design.

Product Model	Max Stable Operating Temp.	Core Material and Technical Challenge	Typical Application Scenarios
HT-120°C	120°C	Special engineering plastics/high-temperature epoxy. Solves the problem of plastic and adhesive degradation in mid-temperature environments like automotive engine compartments.	Automotive testing, near industrial furnaces, inside power equipment, upgrades for standard sensors.
HT-200°C	200°C	High-performance polymers/high-temperature ceramic and metal housing. The challenge is eliminating epoxy or using specialized high-temp adhesives.	Industrial automation, metal smelting process monitoring, non-core aerospace zones, Polyimide fiber links.
HT-300°C	300°C	All-metal/all-ceramic structure, or utilizing mechanical fixation techniques. The challenge is maintaining ferrule alignment precision under high thermal stress.	Downhole geothermal sensing, inside high-temperature furnaces, nuclear reactor monitoring, high-temp steam environments.

II. Technical Advantage: Core Guarantee of OFSCN® High-Temperature Connectors

The OFSCN® High-Temperature Connector series is not merely an assembly of heat-resistant materials; it is a solution based on rigorous thermodynamic design:

1. High-Stability Ferrule and Sleeve:
   • In all models, we use high-precision ceramic (Zirconia) ferrules and sleeves to ensure fiber core alignment. Ceramic materials have an extremely low coefficient of thermal expansion, minimizing Insertion Loss (IL) fluctuation caused by thermal stress when the connector undergoes temperature changes.
2. Specialized Bonding/Fixation Technology:
   • 120°C Models: Utilize customized high-temperature adhesive with superior performance compared to standard epoxy.
   • 200°C/300°C Models: As temperature increases, reliance on adhesive decreases, transitioning instead to special mechanical fixation or fused/brazed techniques to securely anchor the fiber inside the ferrule, fundamentally eliminating the risk of adhesive failure at high temperatures.
3. Industrial-Grade Mechanical Reliability:
   • All high-temperature connectors feature robust metal housing (such as stainless steel) to provide excellent vibration resistance and corrosion resistance, ensuring mechanical performance does not degrade in harsh industrial environments.

III. Selection Guide: Choosing the Right Connector Based on Application Temperature

The principle for selecting a high-temperature connector is: choose the model that meets your maximum operating temperature while reserving an adequate safety margin.

Your Max Operating Temperature	Recommended Model	Value Proposition
90°C – 120°C	HT-120°C	The most cost-effective choice. More reliable than standard connectors, preventing high-temperature degradation.
120°C – 200°C	HT-200°C	Ideal for Polyimide (PI) fiber links. Offers strong thermal stability for industrial heating and certain aerospace applications.
200°C – 300°C	HT-300°C	Extreme performance assurance. Suitable for gold-coated fiber or ultra-high-temp PI fiber, the only choice for geothermal, downhole oil & gas, and high-temperature furnace monitoring.

[Beijing Dacheng Yongsheng Technology Co., Ltd. (DCYS)] offers a complete series of high-performance high-temperature fiber optic connectors (including FC, ST, SMA, and other interface types) to help you easily overcome thermal obstacles and achieve stable optical signal transmission in any extreme environment.

[Beijing Dacheng Yongsheng Technology Co., Ltd. (DCYS)]

Official Website: https://www.ofscn.org

Product Link:

• 120°C Connector: https://www.ofscn.org/connectors/high-temperature-120.html
• 200°C Connector: https://www.ofscn.org/connectors/high-temperature-200.html
• 300°C Connector: https://www.ofscn.org/connectors/high-temperature-300.html