Vintage Kilovac KM-8 High Voltage Vacuum Relay 15kV 30A SPDT (KC-8) 26.5VDC Coil
Vintage Kilovac KM-8 High Voltage Vacuum Relay 15kV 30A SPDT (KC-8) 26.5VDC Coil
Vintage Kilovac KM-8 High Voltage Vacuum Relay 15kV 30A SPDT (KC-8) 26.5VDC Coil
Vintage Kilovac KM-8 High Voltage Vacuum Relay 15kV 30A SPDT (KC-8) 26.5VDC Coil
Vintage Kilovac KM-8 High Voltage Vacuum Relay 15kV 30A SPDT (KC-8) 26.5VDC Coil
Vintage Kilovac KM-8 High Voltage Vacuum Relay 15kV 30A SPDT (KC-8) 26.5VDC Coil

Vintage Kilovac KM-8 High Voltage Vacuum Relay 15kV 30A SPDT (KC-8) 26.5VDC Coil

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$100.00
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Only 0 left in stock.

Vintage Kilovac KM-8 High Voltage Vacuum Relay 15kV 30A SPDT (KC-8) 26.5VDC Coil

Up for sale is a genuine Kilovac KM-8 high-voltage vacuum relay. This is a robust, single-pole, double-throw (SPDT) component designed for reliable switching in demanding applications.

This is the KM-8 model, as clearly marked on the base. This is an older or alternate part number for the more commonly known Kilovac KC-8, sharing the same core specifications and high-performance characteristics. It is an ideal component for use in scientific equipment, high-power RF applications, and industrial power supplies.

Used / Pulled: The relay was carefully removed from a lightly used RF Power Amplifier. It has been tested and is in good operational condition. Cosmetically, it shows signs of previous installation such as attachment wires cut when removed, which gives you the ability to splice to the wires or solder on to the tabs.

Key Specifications:

  • Manufacturer: Kilovac
  • Model: KM-8
  • Contact Arrangement: SPDT (Single Pole, Double Throw), 1 Form C
  • Rated Operating Voltage: 15 kV (DC or 60 Hz)
  • Continuous Carry Current: 30 Amps (DC or 60 Hz)
  • Coil Voltage: 26.5 VDC
  • Coil Resistance: ~100 Ohms
  • Mounting: Flange Mount (includes bracket it was attached to)

Potential Applications:

This type of relay is perfect for:

  • Antenna Switching in Ham Radio or Commercial Broadcast Setups
  • High-Voltage Power Supplies
  • Capacitor Discharge Systems
  • Pulse-Forming Networks
  • Medical Equipment (Electrosurgical Devices)
  • Scientific and Lab Equipment
  • Tesla Coils and Other High-Voltage Projects

We have two of these at the start of this listing.
Price is per relay.
If you want more than one, change the Buy It Now price to the number you need.
Picture is of one of them - both are in the same condition.


We typically ship within one business day!  International buyers are responsible for any customs/duty fees.

Most of the parts we sell are vintage New Old Stock parts.

We use high quality shipping supplies and biodegradable peanuts to make sure your parts arrive safely. 

NOS (New Old Stock) parts are Genuine Factory Original parts.
NORS (New Old Replacement Stock) parts are original vintage aftermarket parts.
NOS and NORS does not necessarily mean the parts are perfect.
Manufacturing technology was not the same as it is today so imperfections should be expected.
Also, these parts may have been in storage for 40-80 years and could be dusty, greasy or have surface rust, spider webs, etc.