CTA24-1200B

Triacs Overview

CTA24-1200B is a standard TRIAC manufactured by Sensata-Crydom, designed for AC power control applications. It features a peak repetitive off-state voltage of 1.2 kV and an on-state RMS current rating of 24 A. The device is housed in a TO-220AB package with screw terminal mounting. Key electrical characteristics include a maximum gate trigger current of 50 mA and a non-repetitive surge current capability of 250 A at 50 Hz or 260 A at 60 Hz. The component operates within a junction temperature range of -40°C to +125°C.

Triacs Feature Summary

• High voltage blocking capability suitable for industrial AC line applications
• Robust surge current handling for inductive load switching
• Standardized TO-220AB package for efficient thermal management

Triacs Applications

• Industrial motor speed control systems
• Solid state relay output stages
• Heating element regulation circuits

Triacs Procurement Notes

Verify the specific suffix variant (e.g., B, CW, BW) against the design schematic, as packaging and snubberless features may differ between sub-types. Confirm that the 24 A RMS rating aligns with the thermal dissipation requirements of the final enclosure. Check for RoHS compliance status if environmental regulations apply to the assembly. Ensure the TO-220AB footprint matches the PCB or panel mount layout.

Triacs Selection Notes

Select this component when a high-voltage, medium-current TRIAC is required for phase-angle or zero-crossing control. The 1.2 kV rating provides sufficient margin for standard 380 V AC industrial lines. Consider the 250 A surge capacity for loads with high inrush currents, such as transformers or motors. Evaluate thermal resistance requirements to determine if additional heatsinking is necessary beyond the TO-220AB tab.

Triacs Part Context

The CTA24-1200B belongs to the broader family of TRIACs offered by Sensata-Crydom under the Crydom brand. It serves as a fundamental semiconductor switch for alternating current distribution. Variants like CTA24-1200CW offer snubberless operation, while others may differ in packaging or thermal specifications. This part represents a standard solution for general-purpose AC power switching where high voltage isolation is critical.

Triacs Replacement Considerations

Direct substitutes include CTA24-1200CW and CTA24-1200BW, which share similar electrical ratings but may feature snubberless technology or different packaging options. Verify pinout compatibility and thermal performance before substitution. Other manufacturers offering equivalent 1.2 kV / 24 A TRIACs in TO-220AB packages may require circuit re-evaluation for gate drive characteristics.