SMP-31 Photo-MOSFET Relay
The 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.
Standards and Certifications
- 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
| Contact Form | 1A, 2A |
| Package Style (Pin Count) | DIP(4 ,6, 8), SMD(4, 6, 8), SOP(4, 8) |
| Load Voltage (V) AC/DC | 350 |
| Load Current Max. (mA) | 130 |
| LED Operate Current Typ/Max. (mA) | 0.8/3.0 |
| On Resistance Typ/Max. (Ω) | 20/24 |
| Output Capacitance (pF) | 55 |
| Off-State Leakage (μA) | 1 |
- 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