Sprague 104j Capacitor

4 min read Jun 26, 2024
Sprague 104j Capacitor

Sprague 104J Capacitor: A Reliable and Durable Component


In the world of electronics, capacitors play a crucial role in filtering, coupling, and regulating electrical signals. One such capacitor that has gained popularity among electronic enthusiasts and professionals alike is the Sprague 104J capacitor. In this article, we will delve into the features, specifications, and applications of this reliable and durable component.

History of Sprague

Before we dive into the details of the 104J capacitor, let's take a brief look at the history of Sprague. Sprague Electric was founded in 1926 by Robert C. Sprague, and it quickly became a leading manufacturer of capacitors and other electronic components. In 1993, Sprague merged with Vishay Intertechnology, a global leader in the manufacture of electronic components. Today, Vishay Intertechnology continues to produce high-quality capacitors, including the 104J series.

Features and Specifications

The Sprague 104J capacitor is a metallized paper capacitor that offers a range of features and specifications, including:

  • Voltage Rating: 50V to 500V
  • Capacitance Range: 100pF to 10uF
  • Tolerance: ±5% to ±20%
  • Operating Temperature: -40°C to +125°C
  • Insulation Resistance: >1000MΩ
  • Dielectric Strength: 200% of rated voltage for 1 minute


The Sprague 104J capacitor is suitable for a wide range of applications, including:

  • Audio Equipment: The 104J capacitor is often used in audio equipment, such as amplifiers, filters, and tone controls, due to its low loss and high reliability.
  • Radio Frequency (RF) Circuits: The 104J capacitor's high self-resonant frequency and low equivalent series resistance (ESR) make it an ideal component for RF circuits.
  • Power Supplies: The 104J capacitor is often used in power supplies, including switch-mode power supplies and linear power supplies, due to its high reliability and long lifespan.


The Sprague 104J capacitor offers several advantages, including:

  • High Reliability: The 104J capacitor is known for its high reliability and long lifespan, making it an ideal component for critical applications.
  • Low Loss: The 104J capacitor's low loss and high Q factor make it suitable for high-frequency applications.
  • Wide Operating Temperature: The 104J capacitor's wide operating temperature range makes it suitable for use in a variety of environments.


In conclusion, the Sprague 104J capacitor is a reliable and durable component that is suitable for a wide range of applications. Its high reliability, low loss, and wide operating temperature range make it an ideal component for audio equipment, RF circuits, power supplies, and other critical applications. Whether you're a DIY enthusiast or a professional electronics engineer, the 104J capacitor is definitely worth considering for your next project.