3EZ19D2E3/TR8

Introduction

The 3EZ19D2E3/TR8 is a diode element specifically designed to provide a voltage-controlled method of limiting voltage and current in low voltage applications. It is classified as a Zener diode, a type of diode capable of maintaining an approximately constant inverse current across it regardless of the magnitude of applied voltage. It is a single element, and the manufacturer, Diodes Inc, classifies it as a Low VF Zener diode.

Applications

Typical applications for the 3EZ19D2E3/TR8 include voltage regulation in low voltage power supplies and logic circuits, as well as in situations requiring constant current, such as low intensity lighting and temperature control. The 3EZ19D2E3/TR8 can also be used in motor speed control, motor control circuit protection, and motors where a constant voltage reference is necessary. The 3EZ19D2E3/TR8 is also suitable for use in automobile headlight circuits, automotive lighting applications, and DC power supply regulation.

Technical specifications

The 3EZ19D2E3/TR8 is rated for a peak repetitive reverse voltage of 19V, a steady state reverse voltage of 15V, and a working voltage of 17.5V. The non-repetitive peak pulse current for this device is 10A for 10ms. The device is rated for a power dissipation of 500mW and an operating temperature range of -40°C to +125°C. The maximum allowable insulation resistance for this device is 10¹² ohms.

Working principle

The working principle of the 3EZ19D2E3/TR8 is based on the concept of a Zener diode. In a standard diode, current will only flow in one direction (forward bias) and will be blocked in the opposite direction (reverse bias). In a Zener diode, however, when the reverse voltage exceeds a certain value (known as the breakdown voltage or Zener voltage) current will begin to flow in the opposite direction, resulting in a nearly constant voltage across the Zener diode. The 3EZ19D2E3/TR8 can be used to maintain a constant voltage in low voltage applications.

Conclusion

The 3EZ19D2E3/TR8 is a single element Zener diode from Diodes Inc. It is suited to applications requiring a voltage-limited, constant current in low voltage circuits. The device is rated for a peak repetitive reverse voltage of 19V, a steady state reverse voltage of 15V, and a working voltage of 17.5V. This device is suitable for use in low voltage power supplies, logic circuits, and motor speed control, as well as a variety of automotive applications. The 3EZ19D2E3/TR8 is an excellent choice for a wide range of low voltage applications.