Threaded SMA coaxial feedthrough with 50 Ω impedance matching and grounded shielding. Available in single-ended SMA50 or double-ended SMAD50 configurations. Single-ended version uses a 1.8 mm conductor, while double-ended version uses SMA connectors at both ends. Rated at 1000 VDC max, 3 A. Frequency range: up to 6.5 GHz. Operates from -200°C to 300°C under UHV (<1×10⁻¹⁰ mbar). CF16 flanges support 1 unit; CF40 flanges accommodate up to 4 units. Custom flanges and weldable versions available. Optional vacuum-side and air-side connectors and cables available.
Features
· Threaded SMA coaxial feedthrough with 50Ω impedance matching, supporting frequencies up to 6.5 GHz.
· Available in single-ended SMA50 or double-ended SMAD50 configurations.
· One unit fits on a CF16 flange; up to 4 units on a CF40 flange.
· Multiple feedthroughs can be welded onto larger flanges.
· Optional connectors and cables available for both ends.
· Custom flange and feedthrough configurations available upon request.
Parameters
Specification |
Shielding Type | Grounded Shielding |
Impedance Matching | 50Ω |
Conductor Diameter | Single-ended: 1.8 mm Double-ended: SMA Interface |
Maximum Voltage | 1000V DC |
Maximum Current | 3A |
Frequency Range | AC to 6.5 GHz |
Temperature Range | -200 °C ~ 300 °C |
Ultimate Vacuum | < 1×10⁻¹⁰ mbar |
Leak Rate | < 1×10⁻¹² Pa·m³/s (He) |
Dimensions

CF Flange Selection Table |
| Flange | Number of Feedthroughs | Single-Ended SMA50 | Double-Ended SMAD50 |
| CF16 | 1 | MT140-SMA50-C16 | MT140-SMAD50-C16 |
| CF40 | 1 | MT140-SMA50-C40 | MT140-SMAD50-C40 |
| CF40 | 2 | MT140-SMA50-C40-2 | MT140-SMAD50-C40-2 |
| CF40 | 3 | MT140-SMA50-C40-3 | MT140-SMAD50-C40-3 |
| CF40 | 4 | MT140-SMA50-C40-4 | MT140-SMAD50-C40-4 |
KF Flange Selection Table |
| Flange | Number of Feedthroughs | Single-Ended SMA50 | Double-Ended SMAD50 |
| KF16 | 1 | MT140-SMA50-K16 | MT140-SMAD50-K16 |
| KF40 | 1 | MT140-SMA50-K40 | MT140-SMAD50-K40 |
| KF40 | 2 | MT140-SMA50-K40-2 | MT140-SMAD50-K40-2 |
| KF40 | 3 | MT140-SMA50-K40-3 | MT140-SMAD50-K40-3 |
| KF40 | 4 | MT140-SMA50-K40-4 | MT140-SMAD50-K40-4 |
Note: For other flange and feedthrough combinations, please contact us. |
Weldable Version Selection Table |
| Number of Feedthroughs | Single-Ended SMA50 | Double-Ended SMAD50 |
| 1 | MT140-SMA50-WV | MT140-SMAD50-WV |
Related Accessories |
| Accessory | SMA50 Coaxial Feedthrough | SMAD50 Coaxial Feedthrough |
| Vacuum-side Connector | MT160-PISC-1.8 MT145-CON-SSMA-VAC | MT145-CON-SMA-VAC |
| Vacuum Cable | MT165-PTFE50 coaxial cable MT165-KAP50 coaxial cable MT165-KAPM series |
| Vacuum-side Connector + Vacuum Cable | MT145-SSMA-FX-PTFE50-500-VAC | MT145-SMA-MX-PTFE50-500-VAC |
| Air-side Connector | MT145-CON-SMA-AIR |
| Air-side Connector + Cable | MT145-SMA-MX-500-AIR |