SK012R

Overview

The SK012RTP is a standard recovery silicon controlled rectifier (SCR) manufactured by Littelfuse Inc. It features a 1 kV repetitive peak off-state voltage and supports a maximum RMS on-state current of 12 A, with an average on-state current rating of 7.6 A. The device is housed in a TO-220AB through-hole package and operates within a junction temperature range of -40°C to 125°C. Key electrical characteristics include a maximum gate trigger voltage of 1.5 V, a maximum gate trigger current of 20 mA, and a maximum on-state voltage of 1.6 V. Non-repetitive surge currents are rated at 100 A for 50 Hz and 120 A for 60 Hz frequencies.

Feature Summary

• Standard recovery type construction suitable for general-purpose AC power control applications
• Electrically isolated TO-220AB package design facilitating direct mounting to heatsinks
• Glass-passivated junction structure ensuring long-term parameter stability and reliability

Applications

• AC motor speed control circuits
• Solid-state relay switching modules
• Industrial heating element regulation systems

Procurement Notes

Verify the specific ordering suffix when sourcing components, as variations such as RTP indicate tube packaging while other suffixes may denote tape-and-reel configurations. Confirm that the procurement source provides official manufacturer documentation or authorized distributor data sheets to ensure the part meets the specified 1 kV voltage and 12 A current ratings. Cross-reference the manufacturer part number with distributor codes to prevent substitution errors during assembly.

Selection Notes

Select this component for designs requiring high-voltage isolation and robust thermal performance in through-hole layouts. Ensure the circuit design accounts for the 7.6 A average current limit and implements appropriate snubber networks if driving inductive loads. Verify that the gate drive circuitry can supply the required 20 mA trigger current without exceeding the 1.5 V maximum gate trigger voltage specification under all operating conditions.

Part Context

This SCR belongs to Littelfuse's Teccor brand family of power semiconductor switches. The TO-220AB form factor is widely utilized in industrial equipment where reliable phase control and high voltage blocking capabilities are necessary. The standard recovery characteristic distinguishes it from fast-recovery variants, making it optimized for line-frequency applications rather than high-frequency switching environments.

Replacement Considerations

Direct replacements must match the 1 kV voltage rating, 12 A RMS current capacity, and TO-220AB physical footprint. Verify that substitute parts maintain equivalent gate trigger specifications and thermal resistance values to ensure compatibility with existing heatsinking and drive circuitry.