MOC3021S-TA1
Manufacturer
Model
MOC3021S-TA1
Category
The Lite-On MOC3021S-TA1 is a compact SMD-6P optoisolator with a 50mA output current and 400V load capability, designed for AC control applications requiring electrical isolation. Its 5kV isolation voltage and 1.15V forward voltage make it suitable for motor control, lighting systems, and industrial automation. Key considerations include thermal management at continuous operation, proper soldering techniques for SMD packaging, and adherence to voltage/current limits to prevent device failure. The product excels in cost-sensitive, low-power AC switching scenarios while being limited by its single-channel design and moderate pricing at lower order volumes.
Reference Pricing
Reference Stock
Specifications
| Fall Time | 1000V/μs |
| Isolation Voltage | 5,000V_rms |
| Operating Temperature Range | -40~+100℃ |
| Operating Voltage | 3V |
| Output Current | 100mA |
| Package Type | SMD-6P |
| Rated Voltage | 3V |
| Rise Time | 1000V/μs |
| Silicon Controlled Rectifier Trigger Current | 15mA |
Function And Role
Core Function
Two-way thyristor optoisolator with isolated output for AC circuit control
Key Characteristics
- 50mA output current (It(rms))
- 400V load voltage
- 1.15V forward voltage (Vf)
- 5kV isolation voltage (Vrms)
- SMD-6P packaging (Tape & Reel packaging)
- Operating temperature range: -40°C to +100°C
Application Domains
Basic Scenarios
- AC motor control systems
- Lighting dimming circuits
- Relay replacement in AC switching applications
Extended Scenarios
- Industrial automation control panels
- Renewable energy system inverters
- Medical device power isolation
- Automotive interior lighting control
Precautions
| Soldering | Use fine pitch soldering tools for SMD-6P package; avoid thermal shock |
| Current Limit | Max continuous output current: 50mA ( peak: 100mA ) |
| Voltage Limit | Max load voltage: 400V AC (DC isolation: 5kV ) |
| Thermal Management | Thermal resistance: 50°C/W; recommend heat sink for >1W continuous operation |
| Storage | Store in <10% relative humidity; avoid temperatures >85°C |
| Risk Warnings |
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Alternative Model Params
- Output current (It(rms))
- Isolation voltage (Vrms)
- Forward voltage (Vf)
- Package type (SMD-6P)
- Operating temperature range
Design Recommendations
| Layout | Maintain 5mm isolation gap between optoisolator and control circuit |
| Thermal | Add 10% safety margin for power dissipation calculations |
| Compatibility | Pair with optocouplers having ≥5kV isolation rating |
| Testing | Verify zero-crossing circuit functionality in AC line applications |
Market Positioning
| Strengths |
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| Weaknesses |
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