Microdot ISO Feedthroughs
Microdot ® Threaded Coaxial Interface
The Microdot ® coaxial interface, developed for aerospace and instrumentation applications, is a small circular connector, which is sometimes mistaken for the slightly larger SMA coaxial connection. In its most common configuration, the S-50 series (the feedthroughs offered herein), it uses a No. 10-32 UNF (.190-32) thread. Male connectors are fitted with a .030/.033 diameter pin and jacks have the female mating socket receptacle. It is commonly used in conjunction with high-frequency, low noise, 50-ohm instrumentation signal lines in accelerometers, and various transducer applications. Accu-Glass Products' Microdot ® and 'between-series' BNC-Microdot ® coaxial feedthroughs are constructed with grounded shields, where the feedthrough shield and flange are electrically common.
BNC-Microdot ® 'between-series' feedthroughs offer a simple means of transitioning between BNC and Microdot ® wired applications, or vise versa. The BNC-Microdot ® feedthrough is often used in conjunction with crystal sensors to monitor deposition thicknesses of in-vacuum coating applications. Microdot ® cable assemblies, connectors, and wiring accessories are also offered. Threaded, mating male and female, coaxial connectors are available.
Features
- Microdot ® and BNC Coaxial Interfaces
- Single and 'Between Series' Configurations
- Kapton® insulated, 50-Ohm cables
- High temperature rated to 250°C
- UHV compatible construction
- Conflat® and ISO KF compatible mounts
- Air service cables/connectors
- Custom solutions on request
Microdot ISO Feedthroughs
The Microdot ® coaxial interface, developed for aerospace and instrumentation applications, is a small circular connector, which is sometimes mistaken for the slightly larger SMA coaxial connection. In its most common configuration, the S-50 series (the feedthroughs offered herein), it uses a No. 10-32 UNF (.190-32) thread. Male connectors are fitted with a .030/.033 diameter pin and jacks have the female mating socket receptacle. It is commonly used in conjunction with high-frequency, low noise, 50-ohm instrumentation signal lines in accelerometers, and various transducer applications. Accu-Glass Products' Microdot ® and 'between-series' BNC-Microdot ® coaxial feedthroughs are constructed with grounded shields, where the feedthrough shield and flange are electrically common.
BNC-Microdot ® 'between-series' feedthroughs offer a simple means of transitioning between BNC and Microdot ® wired applications, or vise versa. The BNC-Microdot ® feedthrough is often used in conjunction with crystal sensors to monitor deposition thicknesses of in-vacuum coating applications. Microdot ® cable assemblies, connectors, and wiring accessories are also offered. Threaded, mating male and female, coaxial connectors are available.
Warning — SMAs, with .250-36 thread and .035/.037 pin diameter, are often mistaken for Microdot S-93, connectors with .250-32 threads and .030/.033 pins. To avoid possible damage to one or both connector interfaces, these connectors should never be cross-mated. Compare Microdot ® and SMA differences below...
Features
- Microdot® and BNC Coaxial Interfaces
- Single and 'Between Series' Configurations
- Kapton® insulated, 50-Ohm cables
- High temperature rated to 250°C
- UHV compatible construction
- Conflat® and ISO KF compatible mounts
- Air service cables / connectors
- Custom solutions on request
Specifications
| Electrical | |
| Voltage 1, Maximum | 500 VDC |
| Current, Max @ 20°C | 2 A |
| Material | |
| Shell | 304 Ss |
| Pin, Ni-Plated | Ss / Mo |
| Insulation, Ceramic | Alumina |
| Connector, Vacuum 2 | |
| BNC, Ni-Plated | Brass / PEEK |
| Microdot, Au-Plated | Brass / PEEK |
| Cable Insulation | Kapton® |
| Connector, Air | Composite |
| Vacuum Range | |
| UHV, Ultrahigh vacuum | 1x10E-10 Torr |
| HV, High vacuum | 1x10E-8 Torr |
| Temperature Range3 | |
| Feedthrough, Single Ended | 250°C |
| Flange, Conflat® | 450°C |
| Flange, ISO | 150°C |
| Connector / Cable, Air | 165°C |
| Connector / Cable, UHV | 250°C |
| Thermal Gradient, Maximum | 25°C/minute |
| Notes |
- Electrical ratings are maximum test values, with feedthrough's vacuum side at ≤ 1x10-4 Torr. Feedthroughs are intended for instrumentation applications carrying low level signal voltage/current.
- PEEK is a polyether ether ketone thermoplastic.
- Overall assembly ratings must be adjusted to that of its lowest rated component. For cryogenic service, the lowest recommended temperature is -200°C