BNC DC Blocker RF Coaxial Connector 50Ω 2W 5W DC–3GHz

BNC DC Blocker RF Coaxial Connector — 2W / 5W, 50Ω, DC–3GHz

Keep your RF signal path clean and your sensitive equipment protected with this precision BNC DC Blocker. Designed for lab benches, field setups, and test environments alike, this compact inline adapter blocks unwanted DC voltage while passing RF signals cleanly up to 3.0 GHz. With a low VSWR of 1.2 and a characteristic impedance of 50 ohms, it integrates seamlessly into coaxial signal chains without compromising signal integrity.

Key Features

• Power Handling: Available in 2W and 5W versions to suit different RF power levels
• Frequency Range: DC to 3.0 GHz — ideal for a broad range of RF and microwave applications
• Impedance: 50Ω standard for compatibility with most RF coaxial systems
• VSWR: ≤ 1.2 for minimal signal reflection and excellent transmission efficiency
• Connector Type: BNC Male to BNC Female — easy in-line installation
• Compact Form Factor: Approximately 25.6 × 9.1 mm (H × D / 1 × 0.36 in) — fits tight cable runs
• Material: Stainless steel body for durability and easy maintenance
• Multiple Options: Choose from 5 variants to match your specific attenuation or power needs

Applications

• Impedance matching and level control in RF test setups
• Oscilloscope and signal analyzer protection from DC offset
• SDR (Software Defined Radio) receiver front-end protection
• Antenna and coaxial cable test benches
• Laboratory and field RF measurement systems

Specifications

For more information on RF coaxial connector standards and electromagnetic compatibility best practices, visit the NIST Electromagnetic Metrology program.

Frequently Asked Questions

Q: What does a BNC DC Blocker coaxial connector do?

A: A BNC DC Blocker is an inline coaxial adapter that prevents DC voltage from passing through an RF signal path while allowing RF signals to pass freely. This protects sensitive equipment — such as oscilloscopes, spectrum analyzers, and SDR receivers — from DC components that can cause damage or measurement errors. This model operates from DC to 3.0 GHz with a 50Ω impedance and VSWR of ≤ 1.2.

Q: What is the difference between the 2W and 5W versions?

A: The 2W and 5W ratings refer to the maximum RF power the DC blocker can handle continuously. The 2W version suits low-power signal monitoring and lab bench use, while the 5W version is better suited for higher-power transmission or test setups where stronger RF signals are present. Both versions share the same 50Ω impedance, BNC Male-to-Female connector type, and DC–3GHz frequency range.

Q: Is this BNC DC Blocker compatible with standard 50-ohm coaxial systems?

A: Yes. This DC Blocker is designed specifically for 50Ω coaxial systems, which is the standard impedance used in most RF test equipment, antennas, oscilloscopes, and signal generators. Its BNC Male to BNC Female form factor allows direct in-line insertion into any standard BNC coaxial cable run.

Q: What connector type does this RF coaxial DC blocker use?

A: This DC Blocker features a BNC Male connector on one end and a BNC Female connector on the other, making it a true in-line adapter. BNC connectors are widely used in RF test and measurement equipment, making this component a versatile addition to any RF toolkit.