Introduction
Selecting the right voltage regulator is crucial for industrial heating, ovens, or lighting dimming applications. Choosing an undersized module may cause overload, while oversizing wastes cost.
This guide covers Aigoodele LSCR & SCR Series Voltage Regulators, helping engineers and system integrators with:
- Load analysis
- Model selection
- Thermal design
- Wiring & integration
Note: LSCR and SCR modules have identical functions; the difference is mainly appearance and wiring.
Key Advantages
- Wide voltage compatibility
- Fast response and stable output
- Compact, easy to integrate
- High reliability under industrial conditions
- Reduced external components required
Applications:
- Industrial electric furnaces and ovens
- Infrared and ceramic heating
- Stage lighting and dimming
- Resistive load control systems
Step-by-Step Selection Guide
Step 1: Identify Load Type
Ensure the load is mainly resistive. LSCR & SCR are not recommended for highly inductive or motor loads.
Step 2: Determine Supply System
- Single Phase → LSCR-1 / SCR-1
- Three Phase → LSCR-3 / SCR-3
Step 3: Calculate Load Current
Theoretical Current:
I_theoretical = P_load ÷ V_supply
Example:
- Load: 6 kW
- Supply: 380 V three-phase
- Current: 6000 ÷ 380 ≈ 15.8 A
Add Safety Margin: ×2.5–3 for surge and thermal margin
15.8 × 3 ≈ 47.4 A → Select LSCR-3 or SCR-3 module
Calculate Your Load Power
SCR Power Regulator Calculator
Estimate the working current and recommended SCR/LSCR module for your load.
Quick LSCR & SCR Series Reference Table
Single-phase 220V (LSCR-1 / SCR-1)
| Model | Voltage (V) | Power (kW) | Theoretical Current (A) | Current with Safety Margin (A) | Heatsink Size (mm) | Fan Size (mm) |
|---|---|---|---|---|---|---|
| 10A | 220 | 0.8 | 3.64 | 9–11 | 110×100×80 | 80×80 |
| 25A | 220 | 1.9 | 8.64 | 22–26 | 110×100×80 | 80×80 |
| 40A | 220 | 3.1 | 14.1 | 35–42 | 150×100×80 | 80×80 |
| 60A | 220 | 4.6 | 20.9 | 52–63 | 150×100×80 | 80×80 |
| 80A | 220 | 6.1 | 27.7 | 69–83 | 9225 | 90×90 |
| 100A | 220 | 7.6 | 34.5 | 86–104 | 9225 | 90×90 |
| 120A | 220 | 9.1 | 41.4 | 103–124 | 9225 | 90×90 |
| 150A | 220 | 10.5 | 47.7 | 119–143 | 9225 | 90×90 |
| 200A | 220 | 11.7 | 53.2 | 133–160 | 9225 | 90×90 |
Three-phase 380V (LSCR-3 / SCR-3)
| Model | Voltage (V) | Power (kW) | Theoretical Current (A) | Current with Safety Margin (A) | Heatsink Size (mm) | Fan Size (mm) |
|---|---|---|---|---|---|---|
| 10A | 380 | 1.3 | 1.98 | 5–6 | 110×100×80 | 80×80 |
| 25A | 380 | 3.1 | 4.7 | 11–12 | 110×100×80 | 80×80 |
| 40A | 380 | 5 | 7.6 | 19–22 | 150×100×80 | 80×80 |
| 60A | 380 | 7.5 | 11.4 | 28–34 | 150×100×80 | 80×80 |
| 80A | 380 | 10 | 15.2 | 38–46 | 9225 | 90×90 |
| 100A | 380 | 12.5 | 19.0 | 47–57 | 9225 | 90×90 |
| 120A | 380 | 15 | 22.8 | 57–69 | 9225 | 90×90 |
| 150A | 380 | 18.8 | 28.6 | 71–86 | 9225 | 90×90 |
| 200A | 380 | 25 | 38.0 | 95–114 | 9225 | 90×90 |
Download Technical Specifications (PDF):
Note: Please download the corresponding PDF for correct wiring instructions.
Thermal Design
- Proper heatsink mounting
- Ensure airflow or forced cooling
- Check thermal resistance & ambient temperature
Control Wiring
- Use shielded wires
- Avoid parallel routing with power lines
- Verify polarity and COM terminal connection
- Proper torque on terminals
Integration Notes
- Overcurrent, phase-loss, and short-circuit protection recommended
- RC snubbers or EMI filters if required
- Ensure proper grounding and shielding
Practical Example
- Total Load: 12 kW
- Supply: 380V Three Phase
- Calculated Current: 12,000 ÷ 380 = 31.6 A
- Safety Margin ×3 → 95 A
- Selected Module: LSCR-3 or SCR-3
- Wiring & Control: shielded control line, proper heatsink, RC filter installed
Note: For loads above 25 kW, small LSCR/SCR modules may not provide adequate thermal performance. Please consider our Thyristor Power Controller series for high-power applications.
Common Troubleshooting
- Overheating → check derating, heatsink, airflow
- Voltage instability → check control signal and load type
- Low output voltage → verify derating and thermal conditions
- Incorrect control connection → check polarity & COM
- Resistive vs inductive load → mainly resistive, inductive loads require special solution
