Product Description
Standex Electronics SMP-38 Series MOSFET Relay; 6 PIN / SMD; SPST-NO (1 FORM A); 0 ~ 600 V; 80 mA
MOSFET Relay • Pin Count / Package Style: 4 PIN / SMD • Circuit: SPST-NO (1 FORM A) • Load Voltage DC or Peak AC: 0 ~ 600 V • Load Current Max.: 80 mA
Product Information
| Manufacturer | Standex Electronics |
| Product Category | Relay |
| Product Sub Category | MOSFET Relay |
| Series | SMP-38 Series |
| Catalog Part Number | SMP-1A38-4ST |
Specifications
| Product Attribute | Attribute Value |
|---|---|
| Pin Count / Package Style | 4 PIN / SMD |
| Circuit | SPST-NO (1 FORM A) |
| Load Voltage DC or Peak AC | 0 ~ 600 V |
| Load Current Max. | 80 mA |
| On-State Resistance Max. | 60 Ohms |
| Output Capacitance | 47 pF |
| Off-State Leakage | 1 µA |
| I/O Isolation Voltage Max. | 3750 V |
| Special Feature | AEC-Q101, UL Approved, RoHS Compliant |
Series Features
SMP-38 Photo-MOSFET Relay
Series DescriptionThe SMP-38 Series is a high-voltage, solid-state Photo-MOSFET relay engineered for precision switching in compact and rugged electronic systems. Available in SOP, SMD, and DIP packages, it supports switching up to 600 V AC or peak DC and load currents up to 80 mA, making it ideal for medium-power applications requiring high isolation and reliability.
With a typical on-resistance of 40 Ω, low output capacitance of 47 pF, and minimal off-state leakage current of 1 µA, the SMP-38 Series ensures clean signal transitions and high signal integrity. Its solid-state design eliminates contact bounce and mechanical wear, offering superior resistance to shock, vibration, and environmental contaminants.
This series is optimized for switching both low-level analog signals and higher-level loads such as LEDs, relays, solenoids, and lamps. Its high input-to-output isolation and long operational life make it a dependable choice for industrial, automotive, medical, and test environments.
- Solid-state switching with no contact bounce or mechanical degradation
- High voltage switching capability (up to 600 V AC/DC)
- Low output capacitance (47 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): Reliable switching for precision testing
Electric Vehicles: High-voltage 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
Solar Battery Management: Efficient switching in renewable energy systems
Telecommunications: Compact relay replacement in communication systems
Security Systems: Silent, dependable switching in access control and alarm systems
Automotive (AEC-Q101): Qualified for harsh automotive environments