Ametek / VTI Instruments / VXI Technology SMP5003 General Purpose Relay

The Ametek VTI Instruments SMP5003 is a general-purpose relay module for high-density switching in VXIbus automated test systems. This SMIP II series card provides 26 SP4T (Single Pole, 4 Throw) relays, each rated 2 A and capable of switching up to 300 V AC/DC and 125 VA. Individual relays can be used for signal routing or combined externally for user-defined configurations, delivering flexibility across diverse test applications.

Path resistance remains below 300 mΩ with insulation resistance exceeding 1×10⁹ Ω, ensuring reliable switching performance. Switching time is under 3 ms, supported by 1×10⁷ mechanical operations and 5×10⁵ electrical operations at full load.

Technical Specifications

• Relay Configuration: 26 SP4T relays per module; up to 156 SP4T relays in a double-slot VXIbus card


• Switching Voltage: 300 V AC, 300 V DC maximum


• Switching Current: 2 A maximum


• Switching Power: 60 W DC, 125 VA maximum


• Path Resistance: 1×10⁹ Ω


• Thermal Offset (HI-LO): < 7 µV per channel


• Capacitance: Open channel < 50 pF; channel-mainframe < 80 pF; high-low 100 MHz


• Insertion Loss: < 0.1 dB @ 100 kHz; < 0.2 dB @ 1 MHz; < 1.0 dB @ 10 MHz


• Crosstalk: < -80 dB @ 100 kHz; < -60 dB @ 1 MHz; < -40 dB @ 10 MHz


• Isolation: < -50 dB @ 100 kHz; < -45 dB @ 1 MHz; < -40 dB @ 10 MHz


• Coil Voltage: Driven from VXIbus +5 V supply


• Switching Time: < 3 ms


• Mechanical Life: 1×10⁷ operations


• Electrical Life: 5×10⁵ operations at full load

Key Features

• High-density switching in compact VXIbus form factor


• Flexible relay configuration allows individual or combined use


• Low thermal offset supports precision signal switching


• Excellent isolation and low crosstalk across audio to RF frequencies


• Compatible with SMP1100 and SMP1200 base units

Typical Applications

• Automated test equipment (ATE) signal routing


• Data acquisition system switching


• Multi-unit test configuration


• General-purpose signal multiplexing

Compatibility & Integration The SMP5003 integrates with VXIbus chassis and operates within the SMIP II module family. Compatible drivers include LabVIEW and IVI standards for test automation software integration.