LEAD-THRU INSULATOR (P/N 25arm300-20-30) - New Surplus

The 25arm300-20-30 is a lead-thru insulator that passes a single electrical conductor through aircraft firewalls and bulkheads while maintaining dielectric isolation. This ceramic or composite insulator prevents electrical leakage and provides mechanical strain relief where battery leads and power cables penetrate structural barriers. The insulator protects the conductor from chafe and vibration damage during normal flight operations.

Install per FAA AC 43.13-1B and your aircraft maintenance manual, ensuring proper conductor routing and secure mounting to prevent movement.

What is the LEAD-THRU INSULATOR (P/N 25arm300-20-30)?

The 25arm300-20-30 is a lead-thru insulator that passes a single electrical conductor through aircraft firewalls and bulkheads while maintaining dielectric isolation. This ceramic or composite insulator prevents electrical leakage and provides mechanical strain relief where battery leads and power cables penetrate structural barriers.

Is the 25arm300-20-30 compatible with my aircraft's avionics suite?

Avionics compatibility depends on your aircraft model and existing installation. The LEAD-THRU INSULATOR is available in: New Surplus. We recommend checking your aircraft's wiring diagrams and STC documentation, or contact our avionics team for compatibility assistance.

Does the 25arm300-20-30 come with an 8130-3 airworthiness tag?

Availability of an FAA 8130-3 tag depends on the part condition. Overhauled and repaired units typically include 8130-3 documentation. As-removed units may include a removal tag with trace history. Contact us for specific documentation on the condition you need.

Do you offer bench testing for the 25arm300-20-30?

We can arrange bench testing through our network of FAA-certified repair stations. Call (904) 998-9101 for testing availability and turnaround times, or submit an RFQ with your specific requirements.