S2010FS21

Overview

The Littelfuse S2010FS21 is a sensitive silicon-controlled rectifier (SCR) from the Teccor line, designed for half-wave unidirectional gate-controlled rectification. It features a non-isolated TO-202 package and supports a maximum on-state current of 10 A with a repetitive peak off-state voltage rating of 200 V. The device exhibits a DC gate trigger current of 200 µA and a holding current of 8 mA. It operates within a junction temperature range of -40 °C to +110 °C and includes glass-passivated junctions for parameter stability.

Feature Summary

• Glass-passivated chip construction ensures long-term device reliability and protection against junction contamination.
• High surge capability allows handling of significant transient currents without damage.
• Sensitive gate design enables triggering with low power input signals.

Applications

• Half-wave rectification in power supply circuits
• Gate control for larger thyristor or triac devices
• General-purpose switching applications requiring high voltage blocking

Procurement Notes

Verify the specific suffix FS21 corresponds to the non-isolated TO-202 variant with 200 V rating and 200 µA gate sensitivity. Confirm RoHS compliance status for the manufacturing lot. Ensure the ordering documentation matches the Littelfuse part number exactly to avoid confusion with isolated or different voltage variants.

Selection Notes

Select this component when a 10 A RMS current capacity and 200 V blocking voltage are required in a standard through-hole package. The 200 µA gate sensitivity makes it suitable for direct drive from logic circuits or low-power sensors. Consider thermal derating curves for continuous operation at elevated case temperatures.

Part Context

This device belongs to the Teccor Sensitive SCRs series, which covers ratings from 0.8 A to 10 A and voltages up to 600 V. The S2010FS21 specifically represents the 10 A class within the 200 V voltage tier, utilizing the TO-202 leaded package format common in industrial and consumer electronics.

Replacement Considerations

Equivalent parts include the S2010VS21 (isolated version) or other 10 A/200 V SCRs in TO-202 packages such as those from STMicroelectronics or Vishay, provided gate sensitivity and thermal characteristics are compatible.

FAQ

What is the difference between the S2010FS21 and S2010VS21?

The S2010FS21 is a non-isolated SCR, while the S2010VS21 is an electrically isolated version that can withstand a minimum high potential test of 4000 V ac rms from leads to mounting tab.

What is the maximum non-repetitive surge current for this device?

The peak one-cycle forward surge current (ITSM) is rated at 100 A.

How does the gate trigger current vary with temperature?

The DC gate trigger current (IGT) increases as the case temperature decreases. At -40 °C, the maximum IGT is higher than the 200 µA specified at 25 °C.