Is there a connector kit supplied with the unit?
Yes, there is a connector kit supplied with the unit.
What are the commercial specifications?
These commercial 12, 20, 24 pole hermetically sealed bifurcated relays have gold plated relay contacts that are rated up to 2amp resistive load rating at 28vdc. Each relay is independently switched through their appropriate coil pins.
What is the pin out difference between the SR64 and the SR64-1?
They are the same Pin for Pin, and package the same as the SR64. The SR64 model became obsolete and was replaced by the SR64-1 version.
What is the SR 64‑1 Switching Relay Unit?
The SR 64‑1 is a 24‑pole aircraft-grade switching relay module, featuring six hermetically sealed, bifurcated relays, designed for reliable electrical switching in avionics systems.
What voltage and current ratings does it support?
It operates at 28 VDC, with gold-plated contacts rated up to 2 A resistive load. Coil current per relay is approximately 120 mA.
How are the relays arranged?
Relays K1–K4 are switched together via coil pins 71 and 72, while K5 and K6 operate independently, offering flexible switching control.
What are the physical specifications of the SR 64‑1?
It weighs roughly 0.25 lb and measures approximately 3.92″ × 3.5″ × 0.82″.
Can the SR 64‑1 operate in extreme environments?
Yes, it’s rated for operation up to 50,000 ft altitude and ambient temperatures ranging from –20 °C to +55 °C.
Does the SR 64‑1 hold aviation certification?
It is currently pending FAA-PMA approval, ensuring readiness for certified installations once approved.
What are the main benefits of using the SR 64‑1?
Offers reliable multiple-channel switching in a compact, durable, gold‑contact relay unit ideal for avionics circuits.
How do I install the SR 64‑1 in my aircraft?
Installation instructions—including pin-out diagrams and enclosure options—are provided in Sandia’s MARC‑70 installation manual.
Where can I purchase or get support for the SR 64‑1?
You can order directly via Sandia Aerospace’s website or authorized distributors; technical support and manuals are available through Sandia’s “Service Manuals” section.
Are there similar relay modules in the Sandia MARC‑70 series?
Yes—Sandia also offers the 12- and 20-pole SR 34‑1 and SR 54‑1 relay units, sharing the same circuit board design as the SR 64‑1.
