Keysight / Agilent / HP 44481A Terminal Block

The Keysight 44481A Terminal Block is a screw-terminal interconnect accessory secure wiring and signal routing in test and measurement systems. It is the interface point for the Keysight 44471A 10-Channel General Purpose Relay Module, enabling organized electrical connections for data acquisition and instrument control in laboratory and industrial environments.

Technical Specifications

Switching Capacity: Up to 2 A, 250 V maximum

Maximum Power: 60 W or 125 VA

Closed Channel Resistance: 10¹¹ Ω

DC Isolation (HI-LO): >10¹⁰ Ω

DC Isolation (Channel-Chassis): >10¹⁰ Ω

Capacitance (Open Channel, Channel-Channel): <5 pF

Capacitance (HI-LO): <27 pF

Capacitance (Channel-Chassis): <80 pF

Insertion Loss at 100 kHz: <0.20 dB

Insertion Loss at 1 MHz: <0.25 dB

Insertion Loss at 10 MHz: <0.50 dB

Crosstalk at 100 kHz: <-73 dB

Crosstalk at 1 MHz: <-53 dB

Crosstalk at 10 MHz: <-33 dB

Key Features

Screw-terminal interface for straightforward wiring and maintenance

Low channel resistance supports mV-level signal switching with minimal attenuation

High isolation characteristics across all channel-to-channel and channel-to-chassis paths

Low capacitance design minimizes signal integrity issues in precision measurement applications

Frequency-dependent insertion loss and crosstalk performance suitable for RF and broadband switching

Typical Applications

Signal routing and multiplexing in automated test equipment

Data acquisition system configuration and reconfiguration

General-purpose relay control in laboratory test setups

Industrial instrumentation requiring organized terminal connections

Compatibility & Integration The 44481A Terminal Block is engineered specifically for use with the Keysight 44471A 10-Channel General Purpose Relay Module, providing the physical wiring interface for all 10 relay channels. This pairing enables complete signal switching and routing solutions for diverse test and measurement applications.