MOC3021
Manufacturer
Model
MOC3021
Category
The Lite-On MOC3021 is a cost-effective optoisolated thyristor component designed for AC load switching in low to medium power applications. Its 50mA output current and 5kV isolation provide reliable signal isolation while maintaining compact DIP-6 packaging. Suitable for industrial motor control and household appliances, it requires careful thermal management and static protection during handling and installation.
Reference Pricing
Reference Stock
Specifications
| Fall Time | N/A |
| Isolation Voltage | 5000Vrms |
| Operating Temperature Range | -55~+110℃ |
| Operating Voltage | 3V |
| Output Current | 100mA |
| Package Type | DIP-6 |
| Rated Voltage | 3V |
| Rise Time | 1000V/us |
| Silicon Controlled Rectifier Trigger Current | 15mA |
Function And Role
Core Function
Optoisolated two-way thyristor output component for AC load switching and signal isolation
Key Characteristics
- 50mA output current (It(rms))
- 400V load voltage
- 1.15V forward voltage (Vf)
- 5kV isolation voltage (Vrms)
- DIP-6 package
- No zero crossing circuit
Application Domains
Basic Scenarios
- AC motor control systems
- Household appliance power switching
- Industrial equipment load protection
Extended Scenarios
- Renewable energy system inverters
- Medical device power isolation
- Automotive electronic control units
Precautions
| Soldering | Maximum soldering temperature 250°C, 20-30 seconds per pin |
| Current Limit | Continuous current 50mA, peak 100mA |
| Voltage Limit | Max working voltage 400V, isolation 5000V |
| Thermal Management | Operating temperature -55°C to +110°C, derating above +85°C |
| Storage | Store in anti-static packaging below 100°C |
| Risk Warnings |
|
Alternative Model Params
- Output current range (20-100mA)
- Isolation voltage (2-7kV)
- Forward voltage (0.8-1.5V)
- Thyristor type (SCR/MOSFET)
Design Recommendations
| Layout | Maintain 5mm isolation distance from high voltage traces |
| Thermal | Use 10x10mm copper pad for heat dissipation |
| Compatibility | Verify with 5-24V control signal sources |
| Testing | Confirm isolation resistance >1GΩ before power-up |
Market Positioning
| Strengths |
|
| Weaknesses |
|
