SMP-37 Photo-MOSFET Relay
The SMP-37 Series is a compact, solid-state Photo-MOSFET relay designed for medium-current switching in space-constrained and high-reliability applications. Supporting up to 60 V AC or peak DC and load currents up to 550 mA, it is available in SOP, SMD, and DIP packages to accommodate a wide range of board layouts and assembly methods.
With a typical on-resistance of 0.75 Ω, low output capacitance of 45 pF, and minimal off-state leakage current of 1 µA, the SMP-37 Series ensures efficient signal control and high signal integrity. Its solid-state construction eliminates contact bounce, enhances durability, and provides immunity to shock, vibration, and environmental contaminants.
Capable of switching both low-level analog signals and higher-level loads such as LEDs, relays, solenoids, and lamps, the SMP-37 Series offers high input-to-output isolation and long operational life, making it a dependable solution for industrial, medical, and test equipment environments.
Standards and Certifications
- Solid-state switching with no mechanical degradation
- Medium voltage and current switching (up to 60 V AC/DC, 550 mA)
- Low on-resistance (typ. 0.75 Ω) for efficient power handling
- Low output capacitance (45 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 | 60 |
| Load Current Max. (mA) | 550 |
| LED Operate Current Typ/Max. (mA) | 0.9/3.0 |
| On Resistance Typ/Max. (Ω) | 0.75/1.6 |
| Output Capacitance (pF) | 45 |
| Off-State Leakage (μA) | 1 |
- Automated Test Equipment (ATE): Fast, reliable signal switching
- Electric Vehicles: Medium-current control in battery and power systems
- I/O Modules: Signal routing and isolation in industrial automation
- Medical Equipment: Safe, low-noise switching in diagnostic and monitoring devices
- Sensing Equipment: Clean signal control in precision instrumentation
- Telecommunications: Compact relay replacement in communication systems
- Security Systems: Silent, dependable switching in access control and alarm systems