Phase control SCR Littelfuse S4020LTP with glass passivated junctions and matte tin plated terminals
Product Overview
Teccor brand Standard SCRs (Sxx20x & Sxx25x Series) are excellent unidirectional switches designed for phase control applications, including heating and motor speed controls. These SCRs are triggered with minimal current and voltage, offering reliable performance in various industrial and commercial applications.
Product Attributes
- Brand: Teccor
- Manufacturer: Littelfuse, Inc.
- Compliance: RoHS-compliant
- Certifications: E71639* (L Package Only)
- Material: Glass-passivated junctions
- Body Material: UL recognized epoxy meeting flammability classification 94V-0
- Lead Material: Copper Alloy
- Terminal Finish: 100% Matte Tin-plated
Technical Specifications
| Series | IT(RMS) | VDRM/VRRM | IGT | ITSM (50Hz) | I2t | di/dt | IGM | PG(AV) | Tstg | TJ | R(J-C) | R(J-A) |
| Sxx20x (20A) | 20 A | 400 to 1000 V | 30 to 35 mA | 255 A | 374 A2s | 125 A/s | 3 A | 0.6 W | -40 to 150 C | -40 to 125 C | 2.4 C/W (Sxx20L) | 50 C/W (Sxx20L) |
| Sxx25x (25A) | 25 A | 400 to 1000 V | 30 to 35 mA | 300 A | 510 A2s | 150 A/s | 3.5 A | 0.8 W | -40 to 150 C | -40 to 125 C | 1.0 C/W (Sxx25R/Sxx25N) | 40 C/W (Sxx25R) |
Applications
Typical applications include AC solid-state switches, industrial power tools, exercise equipment, white goods, and commercial appliances. Internally constructed isolated packages are offered for ease of heat sinking with the highest isolation voltage.
Design Considerations
Careful selection of the correct device for the applications operating parameters and environment will extend the operating life of the Thyristor. Design practices should limit the maximum continuous current through the main terminals to 75% of the device rating. Proper heat sinking and selection of voltage ratings for worst-case conditions are crucial. Overheating, overvoltage (including dv/dt), and surge currents are the primary causes of semiconductor failure. Correct mounting, soldering, and lead forming also help protect against component damage.
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