High voltage relay
R25 Series
R25 series high voltage relays are an enhanced version of the R8 series, featuring specially designed baffles within the arc chamber and a smaller movable contact for improved isolation. Rated for systems up to 25 kV, the R25 can continuously carry 18 amps. Like the R8, it also incorporates molybdenum/tungsten contacts, ensuring superior make and break load switching performance. The Single Pole Double Throw (SPDT) configuration provides design flexibility by incorporating both Normally Open (NO) and Normally Closed (NC) contact sets within a single relay. Continuity transfers between the contact sets when the coil is powered on or off.
Key specifications
R25 Series at a glance
- Voltage
- 25 kV
- Current
- 18 A
- Contact form
- SPDT
- Dielectric
- Vacuum
| Voltage rating | 25 kV |
|---|---|
| Current rating (continuous, DC or 60 Hz) | 18 A |
| Contact arrangement | SPDT |
| Contact form | C = Single Pole Double Throw |
| Operation | Make/Break Load Switching |
| Coil voltage | 12 or 26.5 VDC |
| Construction | Bottle, ribbed |
| Dielectric | Vacuum |
| Contact material | Molybdenum/Tungsten |
| HV termination | Solder Pot or Screw |
| Coil termination | Turret Terminals |
| Mounting | Through Panel or Flange |
Datasheet
Full ratings, dimensions and drawings are in the R25 Series datasheet (PDF).
Download datasheetGet a QuoteNeed something different?
We build custom relays. Our application engineers will spec one to your requirement.
Ask about a custom relayPart numbers
Build your R25 part number
Choose each option and the part number updates. Copy it, or request a quote for that exact part.
Options and part numbers from the R25 datasheet. Other combinations may be available as custom builds.
All standard R25 part numbers
Datasheet specifications
R25 Series performance
| Contact Arrangement | Form C, SPDT (Single Pole Double Throw) |
|---|---|
| Max Operating Voltage (Peak, between Contacts and Contacts to Base) (Max Leakage Current: 15µA) | 25 kV dc or 60 Hz |
| Test Voltage (Peak, between Contacts and Contacts to Base) (Max Leakage Current: 15µA) | 27 kV dc or 60 Hz |
| Continuous Current DC or 60 Hz | 18 A |
| Load Switching (Make and Break) | (Consult Factory) |
| Coil Hi-Pot (V RMS, 60 Hz) | 500 V |
| Contact Resistance (Max) | 0.1 Ω @ 1 A |
| Operate Time (Max, incl bounce) | 15 ms |
| Release Time (Max) | 15 ms |
| Shock, Operating, 1/2 Sine, 11 ms (Peak) | 20 G |
| Vibration, Operating, Sine (55-500 Hz Peak) | 10 G |
| Operating Temperature | -55°C to 125°C |
| Mechanical life | 1,000,000 cycles |
| Weight | 120 g |
| Coil (25 °C) | 12 VDC | 26.5 VDC |
|---|---|---|
| Nominal Voltage | 12 VDC | 26.5 VDC |
| Pick-up Voltage, Max | 9 VDC | 18 VDC |
| Drop-out Voltage | 0.5-5 VDC | 1.0-10 VDC |
| Coil Resistance (±10%) | 30 Ω | 125 Ω |
From the R25 datasheet. The datasheet notes on coil temperature effects apply. Download the datasheet.
Request a quote
Get pricing for the R25 Series
Tell us the part number if you have one, and how many you need. An application engineer will reply with pricing and lead time.
Prefer to talk? Call +1 805 456 6424 or email [email protected].
Thanks, we have your request
An application engineer will reply with pricing and lead time.
Need it sooner? Call +1 805 456 6424 or email [email protected].
Applications
Where the R25 Series is used
High Power Test Systems and Load Banks
Switching and protection for load banks, dynos, and high-power test setups.
Lightning and Surge Simulation
Switching for lightning strike and surge simulation and transient testing equipment.
Medical Devices and Therapy Systems
High voltage switching for medical diagnostic, therapy, and specialty equipment.
Scientific and Analytical Instrumentation
HV switching for scientific instruments, measurement systems, and laboratory setups.
Related relays
Compare similar series
Questions about the R25 Series?
Talk to an application engineer about ratings, options or a custom build.