High-Power, Low-Loss Switching with Storm Protection and 60 dB Isolation

The Daiwa CS-401 is a rugged, high-power 4-position antenna switch designed for clean, efficient RF routing from DC to 500 MHz. With 2.5 kW PEP / 1 kW CW handling, <0.2 dB insertion loss, and >60 dB isolation (at 200 MHz), it delivers dependable performance for ham radio and RF bench setups. A grounded inactive path and the ability to select an unused port provide an added layer of protection during storms.

Key Features

• Frequency Range: DC to 500 MHz
• Positions: 4 selectable outputs
• Power Handling: 2.5 kW (PEP), 1 kW (CW)
• Connectors: SO-239 (UHF)
• Insertion Loss: < 0.2 dB
• VSWR: < 1.2 : 1
• Isolation: > 60 dB (at 200 MHz)
• Protection: Selecting an unused port can help prevent radio damage during a storm
• Well-arranged I/O connectors for easy visual confirmation of positions
• Unique switching mechanism for high circuit isolation
• Inactive antenna side is always grounded for stable, efficient switching

Specifications

Why Choose the CS-401?

The CS-401 combines high power handling with minimal loss and excellent isolation, making it ideal for multi-antenna or multi-radio stations. Its grounded inactive path and intuitive layout simplify operation while supporting reliable station protection practices.

Ideal For

• Amateur (ham) radio stations needing quick antenna or equipment selection
• High-power HF/VHF applications within DC–500 MHz
• RF test benches requiring low loss and high isolation switching