TXN825RG

Scrs Overview

The TXN825RG is a standard Silicon Controlled Rectifier (SCR) from STMicroelectronics, rated for 25 A on-state RMS current and 800 V repetitive peak off-state voltage. It utilizes clip assembly technology to enhance surge current capabilities and is housed in an insulated TO-220AB package with ceramic insulation. Key electrical characteristics include a maximum junction temperature of 125 °C, a gate trigger current maximum of 40 mA, and high dV/dt immunity of 1500 V/µs. The device meets ECOPACK®2 environmental standards and holds UL1557 certification with an insulating voltage of 2500 V RMS.

Scrs Feature Summary

• Utilizes clip assembly technology for superior surge current performance
• Housed in a TO-220AB ceramic insulated package for improved thermal resistance
• Provides high immunity against rapid voltage changes (dV/dt)
• Compliant with ECOPACK®2 RoHS and halogen-free requirements

Scrs Applications

• Solid State Relay (SSR)
• AC DC Inrush Current Limiter (ICL)
• Battery Charger
• Motor soft starter
• Off board automotive battery charger

Scrs Procurement Notes

Verify the specific ordering code TXN825RG corresponds to the 800 V rating and tube packing mode (RG). Confirm that the required insulation voltage and thermal management align with the TO-220AB Insulated package specifications. Ensure design parameters respect the absolute maximum ratings, particularly the 125 °C junction temperature limit and the 25 A RMS current at specified case temperatures.

Scrs Selection Notes

Select this component for general-purpose AC switching applications requiring robust surge handling. The insulated package is suitable where galvanic isolation between the heatsink and circuit ground is necessary. Consider the 1500 V/µs dV/dt rating for circuits prone to fast voltage transients. Verify that the gate trigger current requirements of the driving circuit fall within the specified 40 mA maximum limit.

Scrs Part Context

This device belongs to STMicroelectronics' standard insulated SCR series. It shares the same physical footprint and basic electrical architecture as other variants in the family but is specifically characterized for an 800 V blocking voltage. The 'TXN' prefix denotes the insulated TO-220AB package type, distinguishing it from non-insulated counterparts like the TYN series.

Scrs Replacement Considerations

Direct replacements must match the 25 A RMS current, 800 V voltage rating, and TO-220AB Insulated package form factor. Verify equivalent dV/dt immunity and thermal resistance values. Non-insulated packages require separate isolation measures if used in place of this part.

Scrs FAQ

What is the maximum repetitive peak off-state voltage for the TXN825RG?

The maximum repetitive peak off-state voltage (VDRM/VRRM) is 800 V.

Does the TXN825RG provide electrical isolation?

Yes, it is packaged in an insulated TO-220AB housing with a certified insulating voltage of 2500 V RMS under UL1557.

What is the critical rate of rise of on-state current (dl/dt)?

The critical rate of rise of on-state current is 50 A/µs.