OVER VOLTAGE RELAY (P/N 138-5) - As Removed
P/N: 138-5
Category: Relays
This product requires a custom quote. Please contact our sales team for pricing information or submit an RFQ (Request for Quote).
Available Inventory
| Condition | Stock |
|---|---|
| As Removed | 2 Available |
Product Description
The 138-5 is an overvoltage relay protecting aircraft DC electrical systems from charging circuit faults. Installed between the alternator and voltage regulator, it monitors bus voltage and trips to disconnect the charging circuit or alternator field when overvoltage is detected. This prevents damage to avionics, instruments, and the battery during regulator failure or system malfunction.
Installation requires proper wiring verification and compliance with aircraft maintenance manual specifications and FAA-approved data.
Please note: Product descriptions are provided for informational purposes. Always refer to your aircraft's Illustrated Parts Catalog (IPC) to verify part compatibility and specifications.
Frequently Asked Questions
What is the OVER VOLTAGE RELAY (P/N 138-5)?
The 138-5 is an overvoltage relay protecting aircraft DC electrical systems from charging circuit faults. Installed between the alternator and voltage regulator, it monitors bus voltage and trips to disconnect the charging circuit or alternator field when overvoltage is detected.
Is the 138-5 compatible with my aircraft's avionics suite?
Avionics compatibility depends on your aircraft model and existing installation. The OVER VOLTAGE RELAY is available in: As Removed. We recommend checking your aircraft's wiring diagrams and STC documentation, or contact our avionics team for compatibility assistance.
Does the 138-5 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 138-5?
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.
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