401-2308-ROHS

Overview

The 401-2308-ROHS is a micro-miniature RF coaxial relay manufactured by Dow-Key Microwave Corporation. It features a Single Pole Double Throw (SPDT) configuration with SMA connectors and operates on a 28V DC coil supply. The device supports frequencies up to 18,000 MHz (18 GHz) and handles a maximum RF input power of 60 W. Key electrical specifications include a maximum insertion loss of 0.35 dB and a minimum isolation of 60 dB. The coil draws 0.12 A at 3360 mW with a resistance of 233.33 Ω. It utilizes a failsafe mechanism and is designed for panel mounting within an operating temperature range of -25 °C to 65 °C.

Feature Summary

• Failsafe operation ensures defined state upon power loss
• Micro-miniature form factor suitable for dense integration
• High-frequency capability extending to 18 GHz
• Robust RF handling with 60 W input power rating

Applications

• Telecommunications base station signal routing
• Test and measurement equipment switching matrices
• Electronic warfare systems requiring rapid signal path changes
• Radar system component isolation and switching

Procurement Notes

Verify the specific suffix designation when ordering, as variations such as ROHS indicate compliance status but do not alter functional parameters. Confirm connector type compatibility, typically SMA, with the system interface. Ensure the drive voltage matches the 28V DC requirement specified in the datasheet. Check for environmental certifications if deployment involves strict regulatory zones. Validate physical dimensions against panel cutout requirements prior to procurement.

Selection Notes

Select this model for applications requiring high isolation and low insertion loss at microwave frequencies. The 28V coil drive is standard for many industrial control interfaces. Consider the 60 W power handling limit when designing for high-power transmission lines. The SPDT topology is ideal for simple source-to-load switching or antenna selection tasks. Evaluate thermal management needs given the 65 °C maximum operating temperature constraint.

Part Context

This component belongs to the Dow-Key 401 series of micro-miniature coaxial relays. These devices are engineered for reliability in harsh environments. The series offers various contact configurations and drive voltages. The 401-2308-ROHS specifically denotes the SPDT variant with SMA interfaces and RoHS compliance. It represents a balance between performance metrics and compact physical size for embedded RF systems.

Replacement Considerations

Direct substitutes may include other Dow-Key models within the 401 series with compatible pinouts and electrical ratings. Verify that any replacement maintains the 28V DC coil requirement and SMA connector interface. Cross-reference insertion loss and isolation specs to ensure no degradation in system performance. Physical footprint compatibility must be confirmed for panel mount installations.