Ametek / VTI Instruments / VXI Technology SMP5002 General Purpose Relay

The Ametek VTI Instruments SMP5002 is a high-density, general-purpose relay module for VXIbus systems. It has 50 SPDT relays per module, enabling flexible signal routing and switching in automated test equipment and multi-unit test configurations. The module supports external configuration, allowing adaptation to diverse unit-under-test requirements while maintaining high performance across DC and low-frequency AC applications.

Technical Specifications

• Configuration: 50 Single-Pole, Double-Throw (SPDT) relays


• Switching current: 2 A per channel


• Switching voltage: 300 V AC, 300 V DC


• Switching power: 60 W DC, 125 VA


• Bandwidth: Greater than 100 MHz (-3 dB)


• Path resistance: Less than 300 mΩ


• Insulation resistance: Greater than 1×10⁹ Ω


• Maximum thermal offset (HI-LO): Less than 7 µV per channel


• Open channel capacitance: Less than 50 pF


• Insertion loss: Less than 0.1 dB at 100 kHz; less than 0.2 dB at 1 MHz; less than 1.0 dB at 10 MHz


• Crosstalk: Less than -80 dB at 100 kHz; less than -60 dB at 1 MHz; less than -40 dB at 10 MHz


• Isolation: Less than -50 dB at 100 kHz; less than -45 dB at 1 MHz; less than -40 dB at 10 MHz


• Switching time: Less than 3 ms


• Mechanical rated switch operations: 1×10⁷


• Electrical rated switch operations: 5×10⁵ at full load

Key Features

• High-density relay architecture supporting up to 300 SPDT relays per double-slot mainframe


• Low thermal offset and path resistance for precision switching


• Extended bandwidth performance to 100 MHz


• Excellent isolation and low crosstalk across audio and low-RF frequency ranges


• Long mechanical and electrical life rating for high-cycle applications

Typical Applications

• Automated test equipment (ATE) signal routing and switching


• General-purpose signal multiplexing and distribution


• Multi-unit test configurations requiring flexible relay switching


• DC and AC signal switching in precision measurement systems

Compatibility & Integration The SMP5002 integrates into VXIbus systems as part of the SMIPII family and is compatible with VTI Instruments SMIP II base units including the SMP1100 (single-slot) and SMP1200 (double-slot) mainframes. Modules can be mixed with other SMIPII switch types (SPST, SP4T, RF, power, multiplexers) within the same base unit to create application-specific switching configurations.