CS45-16IO1
1600V 45A phase control SCR for industrial power control. TO-247 package with 200A surge capability.
Product Overview
Description
The Littelfuse CS45-16IO1 is a high-voltage phase control Silicon Controlled Rectifier (SCR) featuring 1600V blocking voltage and 45A RMS current rating. Designed for industrial power control applications, this thyristor provides reliable AC power switching and phase control.
The device offers excellent surge current capability of 200A and low on-state voltage drop for efficient operation. The 1600V rating provides excellent margin for 480V AC industrial applications.
Packaged in the TO-247 package, the CS45-16IO1 is suitable for high-power applications including motor soft starters, heating controls, and power supplies. The device is designed for reliable operation in harsh industrial environments.
Product Series
CS Series
Primary Application
Motor soft starters
Key Features
- 1600V blocking voltage
- 45A RMS on-state current
- Low 1.55V on-state voltage
- 50mA gate trigger current
- 200A surge current rating
- Phase control optimized
- TO-247 package
- RoHS compliant
Specifications
| vdrm | 1600V |
|---|---|
| it | 45A |
| vtm | 1.55V |
| igt | 50mA |
| itsm | 200A |
| package | TO-247 |
| qualification | Industrial |
Applications
Motor soft starters
Motor drive and control systems
Heating controls
Industrial automation and control
Welding equipment
Electronic system design
Power supplies
Electronic system design
Battery chargers
Battery and charging management
Lighting controls
Industrial automation and control
FAE Expert Insights
"The CS45-16IO1 is a robust SCR that I frequently recommend for industrial phase control applications. The 1600V rating is excellent for 480V AC systems, providing good margin for voltage transients. The 45A rating handles most industrial heating and motor control applications. What I appreciate about this SCR is the consistent gate trigger characteristics - the 50mA IGT is easy to drive with standard optocouplers or pulse transformers. For motor soft starter applications, the high surge current rating (200A) is important for handling inrush currents. One design consideration: SCRs require careful attention to dv/dt and di/dt ratings. Use snubber circuits to limit dv/dt below the device rating, and ensure your gate drive provides sufficient current for reliable triggering. The TO-247 package is standard and provides good thermal performance. For thermal design, plan for about 70W dissipation at full current (45A × 1.55V)."
High-voltage 1600V SCR for industrial phase control applications
— Michael Chen, BeiLuo
Frequently Asked Questions
What is the difference between SCR and TRIAC?
SCRs (Silicon Controlled Rectifiers) and TRIACs are both thyristors but have different characteristics: (1) Structure - SCR is a unidirectional device (conducts current in one direction only), while TRIAC is bidirectional (conducts in both directions); (2) Applications - SCRs are used in DC circuits and AC half-wave control, TRIACs are used for full-wave AC control; (3) Gate Triggering - SCR requires single polarity gate current, TRIAC can be triggered with positive or negative gate current; (4) Commutation - SCR turns off when current drops to zero, TRIAC has more complex commutation requirements; (5) Ratings - SCRs typically have higher voltage and current ratings than TRIACs. For the CS45-16IO1 SCR: use for DC motor control, AC half-wave rectification, or as a crowbar protection device. For full-wave AC phase control (like light dimmers), a TRIAC would be more appropriate. SCRs are generally more rugged and reliable than TRIACs for high-power industrial applications.
Use SCRs for DC applications or AC half-wave control. use TRIACs for full-wave AC phase control. sCRs offer higher reliability for industrial applications.