Compact. High-Performance. UHV Compatible
Allectra’s SMP feedthroughs are the smallest coaxial UHV-compatible feedthroughs in our portfolio.
Designed for precision applications, these double-sided feedthroughs are ideal for high-frequency signals up to 14 GHz and offer a cost-effective alternative to SMA.
Available exclusively welded into flanges, these feedthroughs enable compact, high-density connectivity in ultra-high vacuum environments.
Key Features & Benefits
- Materials
- 304L Stainless Steel body for durability and UHV compatibility
- Very low magnetic permeability, Kovar free design
- Fully bakeable
- Compact & Miniaturized Design
- Smallest coaxial feedthrough in our program
- Supports up to 4 SMP feedthroughs on CF16 flanges, making it the only coaxial solution allowing multiple connections on a mini flange
- Less than 6mm diameter, approx. 8mm high
- Superior Electrical & Thermal Performance
- 50 Ohm impedance for easy integration
- Voltage rating: 335V RMS, 500V DC, max. 1A
- Frequency rating: Up to 14 GHz, with Standing Wave Ratio (VSWR)
- ≤1.1 (10GHz)
- ≤1.3 (12GHz)
- ≤1.5 (14GHz)
- Temperature range: 4K to 400°C (feedthrough only), -55°C to 165°C (with connectors)
- Optimized for UHV Applications
- Ultra-High Vacuum rated: <2×10-10 mbar l/s He
- Designed for use in high-vacuum and ultra-high-vacuum chambers
- Designed with regard to MIL STD 348, figure 326 and DESC 94007 & 94008 specifications
- Customizable Options
- Available in Limited Detent (LD) and Smooth Detent (SD) versions
- Smooth Detent (SD) – Designed for ~1000 insertions, ideal for quick connections.
- Limited Detent (LD) – Designed for ~500 insertions, laser-marked for easy identification. More force is required to plug / unplug the connector, which gives extra security for unwanted removal.
- Identical connectors for both SD and LD versions
- Available with CF, KF, or ISO flanges
- Cost-Effective Alternative to SMA
- Smaller and more affordable than double-sided SMA feedthroughs
- Optimized for high-frequency signals in compact UHV setups
Applications
- Microscopy & Measurement Equipment
- Quantum Computing
- Semiconductor & Thin Film Deposition Systems
- Particle Accelerators & Research Facilities
- Aerospace & High-Precision Instrumentation
- And many more…
Connectors are available for our vacuum coaxial cables 301-KAP50 and 301-KAP50S and for semi flexible cables such as 314-COAX-RG405