Littelfuse EC103D Thyristor/Sensitive SCR, 400V, 200µA, TO-92

The Littelfuse EC103D is a Teccor® Thyristor/Sensitive Silicon-Controlled Rectifier (SCR) engineered for precise phase control in a wide array of electronic applications. This component serves as an excellent unidirectional switch, uniquely sensitive and easily triggered with mere microamps of gate current. This low triggering requirement makes it perfectly compatible with control signals from sense coils, proximity switches, and direct microprocessor outputs, simplifying circuit design and enhancing reliability.

Its robust construction features glass-passivated junctions, which provide superior voltage handling and long-term stability. With a voltage capability of up to 600V and a significant surge current tolerance, it is built to withstand demanding electrical environments. The component is housed in a UL94V-0 flame-rated epoxy body, ensuring safety and durability, while the copper alloy leads are 100% matte tin-plated for excellent solderability and corrosion resistance.

Typical Applications

This thyristor is a versatile solution for control and switching tasks across multiple industries. Common uses include phase control for heating elements and motor speed regulation in tools and appliances. It is also ideal for capacitive discharge systems, such as those found in strobe lighting and gas engine ignition systems. Its reliability and sensitivity make it a preferred choice for controls in power tools, domestic 'brown' goods, and major 'white' goods appliances.

Key Specifications

• Primary Function: Sensitive gate thyristor for phase control.
• Peak Repetitive Off-State Voltage (Vdrm): 400V.
• Maximum Gate Trigger Current (Igt): 200µA (extremely sensitive).
• Average On-State Current (It(av)): 510mA.
• On-State RMS Current (It(rms)): 800mA.
• Package: Industry-standard TO-92 through-hole case.
• Surge Protection: Capable of non