21C1-3-21

SWITCH. PUMP
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About this product
The 2-7680-2 is an aviation-grade pressure switch specifically calibrated for monitoring fuel pump pressure in aircraft fuel delivery systems. When the pump outlet pressure falls below or exceeds preset thresholds, the switch actuates an electrical contact to trigger cockpit warnings or control downstream valves.
21C1-3-21 Datasheet
UOM: EA
Stock Location: Dubai
Hazardous Item: Non-Hazardous Item
Life Limited Part: No
Lead Time: Stock
Certification: Dual Release
8130/EASA Eligible: Yes
PRODUCT DESCRIPTION

21C1-3-21

  • Double Snap-Action Contacts: Utilises a negative-rate snap-action spring mechanism that provides two-stage contact closure, virtually eliminating chatter and ensuring reliable operations under vibration

  • All-Stainless-Steel Wetted Path: Welded 300-series stainless-steel diaphragm and pressure ports resist corrosion from aviation fuels and hydraulic fluids, extending service life.

  • High-Temperature Capability: Rated for continuous operation in ambient and fluid temperatures up to 260 °C, suitable for installation near hot engine and pump assemblies.


  • Monitoring fuel pump outlet pressure to trigger low-pressure warnings or pump shutdown.

  • Controlling hydraulic pump activation in secondary fuel boost circuits.

  • Providing over-pressure protection in fuel cross-feed and transfer manifolds.

  • Serving as a test point in fuel system diagnostic benches and ground test equipment.


  • Can this switch handle fuel and hydraulic fluids?

Yes, the all-stainless-steel wetted path is compatible with Jet A/A-1, Avgas, Skydrol, and MIL-H-5606 fluids.

  • What certification documentation is provided?

Each unit ships with dual-release paperwork (FAA 8130-3 and EASA Form 1), certifying it for global airworthiness.

How often should the switch be recalibrated or inspected?

A functional check and calibration verification are recommended every 24 months or per the operator’s maintenance program.


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