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Ceramic To Metal Technology

Type-N Feedthroughs

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Type N and SMA High-Frequency Connectors - Standard (to 1GHz)

Type N Specifications for Standard and High Frequency Coaxial

Type N feedthroughs combine the most popular medium-sized high frequency connector with a feedthrough designed to perform in high and ultra-high vacuum applications. The standard Type N series is suitable for use to 1 GHz. Type N feedthroughs and mating connectors are rated for 500 Volts DC and up to 3 Amps. Subminiature Type-A (SMA) feedthroughs are compact designs suited for medium to high frequency applications. Similar to the Type N series, the standard SMA series is suitable for use to 1 GHz. SMA feedthroughs and connectors are rated for 700 Volts DC and up to 1 Amp. The floating shield version is rated to 2500 Volts DC.

Type N and SMA - 50 Ohm - Matched Impedance

Both Type N and SMA feedthroughs are also offered with increased signal transmission performance. These high-vacuum feedthrough designs have been engineered for improved RF performance in high frequency applications up to 8 GHz. Unlike the standard Type N and SMA feedthroughs which are intended for UHV applications, these matched impedance versions utilize a Teflon dielectric spacer. This design parameter optimizes electrical performance but requires consideration in some vacuum environments. High Performance SMA rated to 18 Ghz also available.

Type N Standard

Single/Double Ended: Single
Electrical Rating: Voltage: 500 Volts DC Current: 3 Amps
Thermal Rating:  Feedthrough: -200 to 450oC Air-side Connector: -65 to 165oC
Conductor:
304 Stainless Steel
Impedance: 
Non-constant

Type N High Frequency

Single/Double Ended: Single/Double
Electrical Rating: Voltage: 500 Volts DC Current: 3 Amps
Thermal Rating:  Feedthrough: -200 to 450oC Air-side Connector: -65 to 165oC
Conductor:
304 Stainless Steel
Impedance: 
50 Ohms

Operating Conditions

The electrical and thermal ratings specified are safe operating limits determined by various factors including material properties, mechanical design, and the intended operating environment. All electrical ratings are based on operation with one side in dry atmosphere and the other side in vacuum of 1 x 10-4 Torr maximum pressure. Temperature ratings for various mounting options may reduce the operating range of an assembly. All assemblies have a maximum thermal gradient of 25oC per minute and may be damaged if this limit is exceeded.

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