Product Description
Standex Electronics SMP-31 Series MOSFET Relay; 6 PIN / DIP; DPST-NO (2 FORM A); 0 ~ 350 V; 100 mA
MOSFET Relay • Pin Count / Package Style: 8 PIN / SOP • Circuit: DPST-NO (2 FORM A) • Load Voltage DC or Peak AC: 0 ~ 350 V • Load Current Max.: 100 mA
Product Information
| Manufacturer | Standex Electronics |
| Product Category | Relay |
| Product Sub Category | MOSFET Relay |
| Series | SMP-31 Series |
| Catalog Part Number | SMP-2A31-8PT |
Specifications
| Product Attribute | Attribute Value |
|---|---|
| Pin Count / Package Style | 8 PIN / SOP |
| Circuit | DPST-NO (2 FORM A) |
| Load Voltage DC or Peak AC | 0 ~ 350 V |
| Load Current Max. | 100 mA |
| On-State Resistance Max. | 24 Ohms |
| Output Capacitance | 55 pF |
| Off-State Leakage | 1 µA |
| I/O Isolation Voltage Max. | 1500 V |
| Special Feature | UL Approved, RoHS Compliant |
Series Features
SMP-31 Photo-MOSFET Relay
Series DescriptionThe SMP-31 Series is a compact, solid-state Photo-MOSFET relay optimized for high-voltage switching in space-constrained and performance-critical applications. Supporting up to 350 V AC or peak DC and load currents up to 130 mA, it is available in SOP, SMD, and DIP packages for versatile design integration.
With a typical on-resistance of 20 Ω, output capacitance of 55 pF, and low off-state leakage current of 1 µA, the SMP-31 Series delivers efficient signal control and high reliability. Its solid-state architecture ensures no contact bounce, resistance to environmental stressors, and long operational life.
Ideal for switching both low-level analog signals and higher-level loads such as LEDs, relays, solenoids, and lamps, the SMP-31 Series is a trusted solution for industrial, medical, and test equipment environments.
- Solid-state switching with no mechanical degradation
- High voltage switching capability (up to 350 V AC/DC)
- Low output capacitance (55 pF) for clean signal transitions
- Minimal off-state leakage (1 µA) for high signal fidelity
- High input-to-output isolation for safe and reliable circuit separation
- SOP, SMD, and DIP package options for flexible integration
- Shock and vibration resistant, impervious to dirty environments
- Stable on-resistance over time for consistent performance
- Long operational life with high reliability in solid-state form
Automated Test Equipment (ATE): Fast, reliable signal switching
Electric Vehicles: Medium-power control in battery management systems
I/O Modules: Signal routing and isolation in industrial automation
Medical Equipment: Safe, low-noise switching in diagnostic devices
Sensing Equipment: Clean signal control in precision instruments
Telecommunications: Relay replacement in compact communication systems
Security Systems: Silent, reliable switching in access control and alarms