PAT-3+

Overview

The Mini-Circuits PAT-3+ is a surface-mount fixed attenuator designed for RF applications. It provides a nominal attenuation of 3 dB with an impedance of 50 Ohms. The device operates from DC to 7000 MHz and supports a maximum power handling of 1 Watt. It utilizes a ceramic construction within an AF320 (TO-04) package, measuring 9.9 mm in length, 4.4 mm in width, and 2.8 mm in height. The component features four SMD flat leads and maintains excellent VSWR performance across its operational bandwidth.

Feature Summary

• Fixed 3 dB attenuation value ensures consistent signal reduction without adjustment requirements
• Ceramic housing provides thermal stability and durability for high-frequency environments
• Surface-mount design facilitates automated assembly and compact PCB integration

Applications

• RF communication systems requiring precise signal level control
• Base station infrastructure for input/output matching
• Test and measurement instruments needing stable reference attenuation

Procurement Notes

Verify the specific datasheet version against the manufacturer's official documentation to confirm current electrical specifications and mechanical dimensions. Ensure that the ordering suffix matches the required package style and termination type. Cross-reference the part number with authorized distributors to confirm availability and authenticity. Check for any recent updates regarding RoHS compliance or material composition changes. Confirm that the operating environment does not exceed the specified maximum power handling capabilities.

Selection Notes

Select this component when a fixed 3 dB loss is required in a 50 Ohm system up to 7 GHz. Consider the AF320 package size for space-constrained designs. Evaluate the 1 Watt power rating against the expected signal levels to prevent overheating. Compare VSWR specifications if impedance matching precision is critical for the application. Ensure compatibility with standard surface-mount reflow processes.

Part Context

The PAT series represents Mini-Circuits' line of fixed attenuators, offering various attenuation values in compact surface-mount packages. The PAT-3+ specifically addresses the need for low-loss signal conditioning in RF circuits. These components are commonly used in conjunction with amplifiers and mixers to improve system linearity and protect sensitive downstream stages from excessive input power.

Replacement Considerations

Direct substitutes include other Mini-Circuits PAT series variants with different attenuation values, such as PAT-6+ or PAT-10+, if higher loss is acceptable. Alternative manufacturers may offer similar 3 dB SMT attenuators in compatible packages, but electrical parameters like VSWR and power handling must be verified for equivalence.