Coaxial feedthrough with 50 Ω impedance matching for high-frequency signal transmission. Available in single-ended BNC50 or double-ended BNCD50 configurations. CF16 flanges support 1 unit; CF40 flanges accommodate up to 4 BNC50 units. Custom flanges and weldable versions are available. Features grounded shielding. Single-ended version uses a 2.4 mm conductor, while double-ended version uses BNC connectors at both ends. Rated at 500 VDC max, 3 A. Frequency range: up to 100 MHz (single-ended), 4 GHz (double-ended). Operates from -200°C to 300°C under UHV (<1×10⁻¹⁰ mbar). Optional vacuum-side and air-side connectors and cables available.

Shielding Type

Grounded Shielding

Impedance Matching

50 Ω

Conductor Diameter

Single-ended: 2.4 mm
Double-ended: BNC connector

Maximum Voltage

500 V DC

Maximum Current

3 A

Maximum Frequency

Single-ended: AC to 100 MHz
Double-ended: AC to 4 GHz

Temperature Range

-200 °C ~ 300 °C

Ultimate Vacuum

< 1×10⁻¹⁰ mbar

Leak Rate

< 1×10⁻¹² Pa·m³/s (He)

Flange

Number of Feedthroughs

Single-ended BNC50 

Feedthrough

Double-ended BNCD50 

Feedthrough

CF16

1

MT140-BNC50-C16

MT140-BNCD50-C16

CF40

1

MT140-BNC50-C40

MT140-BNCD50-C40

CF40

2

MT140-BNC50-C40-2

MT140-BNCD50-C40-2

CF40

3

MT140-BNC50-C40-3

MT140-BNCD50-C40-3

CF40

4

MT140-BNC50-C40-4

/

Number 

of Feedthroughs

Single-ended BNC50 Feedthrough

Double-ended BNCD50 Feedthrough

1

MT140-BNC50-WV

MT140-BNCD50-WV

Accessory

BNC50 Coaxial Feedthrough

BNCD50 Coaxial Feedthrough

Vacuum-side Connector

MT160-PPOC-2.4
MT160-CRFC-2.4
MT145-CON-SBNC50-VAC

MT145-CON-BNC-VAC

Vacuum Cable

MT165-PTFE50 Coaxial Cable
MT165-KAP50 Coaxial Cable
MT165-KAPM Series

Vacuum-side Connector + Cable

MT145-SBNC50-FX-PTFE50-500-VAC

MT145-BNC-MX-PTFE50-500-VAC

Air-side Connector

MT145-CON-BNC-AIR

Air-side Connector + Cable

MT145-BNC50-MX-500-AIR