Agilent/Keysight 44471A

The Agilent/Keysight 44471A is a 10-channel armature latching relay module designed for precision switching in test and measurement systems. Each relay delivers 250 V, 2 A maximum switching capability with exceptionally low thermal offset (less than 3 μV/channel) and closed-channel resistance below 1 Ohm. The module supports 10^8 mechanical operations per relay and achieves scan rates to 43 channels/second, making it ideal for DUT power control, external relay actuation, and attenuator configuration. Screw terminal connectivity simplifies integration into automated test systems.

– Technical Specifications

• Channels: 10, SPST latching relay
• Switching per Relay: 250 V max, 2 A max, 60 W or 125 VA max
• Module Power Rating: 600 W or 1250 VA
• Closed Channel Resistance: Less than 1 Ohm
• Thermal Offset: Less than 3 μV/channel
• Mechanical Life: 10^8 operations
• Scan Rate: 43 channels/second
• DC Isolation: Channel-Channel >10^11 Ohms; Channel-Chassis >5 × 10^11 Ohms
• AC Isolation (Capacitance): <7 pF (channel-channel and channel-chassis with 1 channel closed)
• Insertion Loss (50 Ohm): <0.20 dB @ 100 kHz, <0.25 dB @ 1 MHz, <0.50 dB @ 10 MHz
• Crosstalk (50 Ohm): <−73 dB @ 100 kHz, <−53 dB @ 1 MHz, <−33 dB @ 10 MHz

– Key Features

• Low thermal drift enables precise signal-path switching without measurement corruption
• Armature latching design maintains relay state without continuous coil power
• Screw terminal block eliminates connector-related variability
• High isolation performance supports multi-signal environments

– Typical Applications

• Automated test system (ATS) switching matrices
• Power supply gating and load switching
• Signal routing and path configuration
• Attenuator and filter bank control

– Compatibility & Integration

Designed for Keysight 3499A/B/C mainframes and compatible switch mainframe units. The 44471A module fills low-channel-count applications requiring higher switching capability than N2260A or N2261A alternatives.