Agilent/Keysight E1361A

The Agilent/Keysight E1361A is a B-size, 1-slot VXI register-based relay matrix module that delivers high-density signal routing and switching for automated test systems. The module features a configurable 4×4 2-wire matrix with latching relays that retain their programmed state through power cycles. Relays reset to open on power-on.

The E1361A supports reconfiguration as a dual 2×4 2-wire matrix or 8:1 2-wire multiplexer, making it adaptable to diverse switching architectures. Each crosspoint switches both Hi and Lo lines independently.

Technical Specifications

Switching Performance

• Voltage rating: up to 250 Vdc and 354 Vpk ac


• Current rating: 1 A dc or ac per channel


• Power per channel: 40 W


• Power per module: 320 W / 960 VA


• Closed channel resistance: <1.5 Ω typical, <3.5 Ω end-of-life


• Maximum thermal offset per channel (differential Hi-Lo): 14 µV


• Maximum voltage (any terminal to any other terminal or chassis): 250 V dc, 250 V ac rms, 354 V peak Module Configuration


• Device type: Register-based, A16, slave only


• Module size: B-size, 1-slot


• Relay type: Latching


• Standard matrix: 4×4 2-wire


• Alternative configurations: Dual 2×4 2-wire or 8:1 2-wire multiplexer

Key Features

• Latching relay design eliminates holding current


• Programmed relay state preserved across power loss


• All-relays-open initialization on power-on reset


• 2-wire crosspoint architecture with independent Hi/Lo switching


• Field-reconfigurable matrix topology via jumper removal


• Scalable architecture supports matrix expansion

Typical Applications Automated test equipment, prototyping platforms, custom circuit development, multi-channel signal routing, production test systems requiring dynamic path reconfiguration.

Compatibility & Integration The E1361A integrates into VXIbus systems as a register-based module. C-size system compatibility requires the E1403C adapter. Multiple modules can be connected for expanded matrix configurations. Documentation includes user and service manuals; instrument drivers are available from Keysight Technologies.