25W,DC-18GHz Attenuator, N connector, ZSJxx-25RN-18

Chengdu Zysen is proud to introduce the ZSJxx-25RN-18, a high-performance, bi-directional N coaxial fixed attenuator engineered for demanding RF and microwave applications. Covering a broad frequency range of DC to 18GHz with attenuation values from 1dB to 40dB, this precision component is ideal for test and measurement, communication systems, defense electronics, and medical equipment where signal integrity and reliability are critical.

The ZSJxx-25RN-18 delivers outstanding attenuation precision across its entire operating range:

• ±0.8dB for 1–10dB attenuation
• ±0.9dB for 11–20dB attenuation
• ±1.1dB for 21–40dB attenuation

This level of accuracy ensures consistent signal conditioning, making the attenuator suitable for sensitive RF chains, calibration setups, and production testing.

With a continuous wave (CW) power rating of 25 watts under normal conditions, the ZSJxx-25RN-18 handles moderate power levels with ease. When operating in high-temperature environments, the device derates linearly to 2.5W at 125°C, providing predictable performance and built-in thermal protection – a critical feature for system reliability in aerospace, defense, or industrial applications.

A maximum VSWR of 1.45 ensures minimal signal reflection, reducing power loss and maintaining system efficiency. When paired with the precise attenuation characteristics, this low VSWR contributes to cleaner measurements and more stable system operation.

The attenuator features N male-to-female connectors constructed from Brass, offering:

• Superior mechanical durability under repeated mating cycles
• Excellent corrosion resistance for harsh environments
• Reliable 50Ω impedance matching

The bi-directional design allows the attenuator to be inserted in either orientation, simplifying installation and reducing inventory complexity.

Rated for operation from -55°C to +125°C, the ZSJxx-25RN-18 performs reliably in extreme thermal conditions, from cold-start military equipment to hot industrial environments.

• RF test and measurement setups
• Communication infrastructure (5G, satellite, microwave links)
• Defense and aerospace systems
• Medical diagnostic equipment
• Antenna and receiver front-end protection
• Calibration labs and production testing

Specify attenuation value by replacing "xx" in the part number:

Available attenuation values: 1dB, 2dB, 3dB, ..., 40dB. Please contact us for custom values.

Manufactured under ISO 9001 certified processes, each ZSJxx-25RN-18 attenuator undergoes rigorous inspection and testing to ensure compliance with all electrical and mechanical specifications.