12S Series High-Temperature Connector for Helicopter Engine Sensors

SF Series Aviation Connectors Specifications and Performance Data

Selecting a Connector for Helicopter Engine Monitoring Sensors at 120°C

For engine monitoring sensors in helicopters operating at 120°C, the high-temperature version of the 12S series connector is a suitable choice. Its rated temperature range of -55°C to 150°C provides a sufficient margin above the engine compartment's operating temperature.

Key Specifications for High-Temperature Performance

• Temperature resistance: -55°C to 150°C, covering the 120°C engine compartment requirement with a safety margin.
• Insulation material: Ceramic insulators maintain dielectric performance at elevated temperatures where standard plastics may degrade.
• Sealing: High-temperature resistant silicone sealing rings preserve the environmental seal under continuous heat exposure.
• Contact configuration: 3 pins for transmitting temperature and speed signals from the monitoring sensors.
• Contact resistance: Less than 5mΩ, supporting accurate signal transmission for reliable monitoring data.
• Vibration resistance: Rated at 20g, accommodating the vibration profile of helicopter flight conditions.

Application Fit for Helicopter Engine Monitoring

The 12S series connector addresses two critical demands of this application: sustained high-temperature exposure and mechanical vibration. The ceramic insulator construction prevents signal degradation that can occur when standard insulating materials soften or carbonize at elevated temperatures. The silicone sealing rings maintain the connector's environmental protection despite the thermal cycling common in engine compartments.

The 3-pin layout matches the signal requirements of typical engine monitoring setups, carrying both temperature and speed data. The low contact resistance helps preserve signal integrity over the connector's service life, which is essential for accurate engine parameter monitoring.

Installation and Verification Notes

Before finalizing the connector selection, verify the following points against your specific sensor configuration:

• Confirm the sensor's pinout matches the 12S series 3-pin arrangement.
• Check that the cable diameter and termination method are compatible with the connector's specified cable range.
• Validate that the vibration rating of 20g aligns with the actual vibration spectrum measured at the mounting location on the helicopter.
• Review the connector's mating cycle rating if the sensor requires periodic removal for maintenance.

For related high-temperature and aviation connector options, see the SF Series Aviation Connectors Specifications and Performance Data. If your application also involves electromagnetic interference concerns, review the guidance on connector selection for communication modules requiring EMI resistance.

If your helicopter's engine monitoring system requires a different pin count, a different mounting style, or operates at temperatures above 150°C, contact our engineering team with your full requirements so we can recommend the appropriate connector series.