What is the name of the device shown in...

🔍 Key Concepts

• Compare the physical shapes of each numbered device to common semiconductor packages used in marine electrical equipment. • Remember that a bridge rectifier usually has four terminals for AC input and DC output, often in a block package. • A silicon-controlled rectifier (SCR) is a type of controlled diode that typically has an extra small terminal in addition to the main power connections.

💭 Think About

• Look closely at device 4 and count how many connection lugs or terminals it appears to have compared with devices 1, 2, and 3. • Ask yourself which option in the list would normally be packaged as a stud-mounted, high‑current device with an additional control connection. • Which option describes a single component, and which options describe an assembly (like several diodes in one block)?

✅ Before You Answer

• Verify whether device 4 has more than two electrical connections; if so, a simple rectifier diode may not fit. • Check if the body style of device 4 matches the block-like shape often used for a rectifier bridge; if it doesn’t, that choice is unlikely. • Confirm which of the choices is known for having a separate control (gate) lead in addition to the main power leads, and see if that matches the illustration.

What is the name of the device shown in figure "4" of the illustration? See illustration EL-0068.

rectifier diode

power rectifier diode

rectifier bridge

silicon-controlled rectifier

🔍 Key Concepts

💭 Think About

✅ Before You Answer