The Keysight 44473A is a 4×4 two-wire matrix switch module that enables flexible signal routing and interconnection between any of four input channels and any of four output channels. Designed for automated test systems and data acquisition applications, this module supports complex signal paths between instruments and devices under test through simultaneous switching of both high and low signal lines at each crosspoint. The module accommodates voltages to 250V and currents to 2A per channel (8A maximum per module), making it suitable for both low-level analog and moderate-power applications. Built on 2PST relay technology with 10⁸ mechanical operations lifetime and <1 Ohm closed-channel resistance, the 44473A delivers repeatable low-noise switching with <3 µV thermal offset. Maximum scan rate reaches 43 channels/sec for high-throughput test sequences.
Technical Specifications
• Configuration: 4×4 two-wire matrix
• Maximum Voltage: 250V
• Maximum Current: 2A per channel; 8A per module
• Maximum Power: 60W per channel, 125VA per channel; 240W per module, 500VA per module
• Relay Type: 2PST (2-Pole Single-Throw)
• Mechanical Relay Life: 10⁸ operations
• Closed Channel Resistance: <1 Ohm initial
• Thermal Offset: <3 µV
• Maximum Scan Rate: 43 channels/sec
– Key Features
• Simultaneous switching of two signal lines (high and low) per crosspoint
• Low insertion resistance minimizes signal degradation
• Scalable architecture supports multiple modules for expanded matrix configurations
• Mechanical relay construction ensures long service life in production test environments
• Included connection terminal with user-installable 25-pin D-sub connector
– Typical Applications
• Automated test equipment (ATE) signal routing
• Multi-channel data acquisition systems
• Device characterization with complex interconnect requirements
• Production test with high-throughput switching demands
– Compatibility & Integration
The 44473A integrates directly into Keysight 3499A/B/C mainframes and functions as an equivalent to Option 013 of the 3488A Switch/Control Unit. Standard shipment includes the module, one connection terminal, and Certificate of Verification.
