Part Number: T521D107M025ATE040

Manufacturer: KEMET

Description: CAP TANT POLY 100UF 25V 2917

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of T521D107M025ATE040

Datasheet  T521D107M025ATE040 datasheet
Product Photos T521 Series
Product Training Modules Capacitor Basics- Typical Uses for CapacitorsDerating Guidelines for Surface Mount Tantalum CapacitorsLow ESR Polymer Capacitors for 24 V to 48 V Inputs
Featured Product KO-CAP Organic Polymer Capacitors
Standard Package 500
Category Capacitors
Family Tantalum – Polymer Capacitors
Series KO-CAP T521
Packaging Tape & Reel (TR)
Capacitance 100μF
Tolerance ±20%
Voltage – Rated 25V
ESR (Equivalent Series Resistance) 40 mOhm
Type Molded
Operating Temperature -55°C ~ 105°C
Mounting Type Surface Mount
Package / Case 2917 (7343 Metric)
Size / Dimension 0.287″ L x 0.169″ W (7.30mm x 4.30mm)
Height – Seated (Max) 0.122″ (3.10mm)
Lead Spacing
Manufacturer Size Code D
Features High Reliability
Lifetime @ Temp.
Online Catalog KO Cap T521 Series
Other Names 399-13128-2


Capacitors are essential electrical components that ensure the stability and performance of numerous devices and circuits. The T521D107M025ATE040, which is part of the KEMET Organic Capacitor (KO-CAP) family, is one exceptional capacitor that has been making waves in the world of electronics. In this detailed tutorial, we will look at the T521D107M025ATE040 KO-CAP capacitor’s features, benefits, uses, and environmental compliance.

Understanding the KO-CAP Capacitor Family

What is KO-CAP?

The KEMET Organic Capacitor, abbreviated KO-CAP, is a solid electrolytic capacitor with a conductive polymer cathode. KO-CAP capacitors may produce extraordinarily low Equivalent Series Resistance (ESR) while maintaining increased capacitance retention at high frequencies thanks to its revolutionary design.

Benefits of T521D107M025ATE040

Because of its many useful features and benefits, the T521D107M025ATE040 KO-CAP capacitor is the component of choice for a wide variety of electronic applications, including the following:

  1. Low ESR Values: This capacitor has an ESR that is so low that it enables efficient energy transfer and minimized power loss. Its ESR is only 4 m.
  2. Stable Capacitance: It does this by keeping the capacitance values steady throughout a large temperature and voltage range, which in turn ensures that the performance is always the same.
  3. No Aging Effects: The KO-CAP series, in contrast to other capacitors, shows very little sign of aging over time, which ensures that its reliability will persist for a very long time.
  4. High Ripple Handling: It can successfully withstand high ripple currents, helping to steady and noise-free power supply.
  5. Volumetric Efficiency: The KO-CAP capacitors provide high capacitance in a small surface mount package, reducing board space.
  6. High-Frequency Capacitance Retention: Its capacitance remains constant at high frequencies, making it ideal for high-frequency applications.
  7. Reliability Testing: These capacitors are subjected to extensive testing, including 100% accelerated steady-state aging and surge current tests, to ensure their longevity.

Benefits of the T521D107M025ATE040 KO-CAP capacitor

  1. Low ESR Values: The T521D107M025ATE040 has a low Equivalent Series Resistance (ESR) of just 4 m. This extremely low ESR enables highly efficient energy transfer within electronic circuits, resulting in lower power loss. It is especially important in applications where avoiding energy waste and maintaining high efficiency are critical.
  2. Stable Capacitance: One of this capacitor’s notable advantages is its ability to maintain consistent capacitance values throughout a wide range of environmental conditions. The T521D107M025ATE040 dependably supplies the intended capacitance even when subjected to severe temperatures or variable voltage levels. This ensures that your electronic systems are reliable and predictable.
  3. No Aging Effects: Certain capacitors can deteriorate over time. The KO-CAP series, including the T521D107M025ATE040, on the other hand, shows little aging over time. This ensures that its performance remains consistent and reliable throughout its operational life, minimizing deterioration worries.
  4. High Ripple Handling: In electrical circuits, ripple currents are irregularities in the voltage or current waveforms. The T521D107M025ATE040 excels in properly handling strong ripple currents. This capacity helps to steady, noise-free power supply, which are crucial for sensitive electronic equipment and applications that require clean power.
  5. Volumetric Efficiency: Saving board space is often a major challenge in the field of electronics, particularly with compact and densely populated systems. KO-CAP capacitors, such as the T521D107M025ATE040, provide high capacitance in a small surface mount package. This high volumetric efficiency enables designers to maximize device usefulness without sacrificing performance.
  6. High-Frequency Capacitance Retention: The T521D107M025ATE040 excels in applications requiring high-frequency performance by preserving capacitance even at high frequencies. This capability is critical for high-speed communication systems, where signal integrity is critical.
  7. Reliability Testing: The T521D107M025ATE040 is subjected to thorough reliability testing to assure its extended operational life and durability. These tests include 100% accelerated steady-state aging and surge current tests to ensure that the capacitor can endure the demands of different applications and difficult operating circumstances.

In conclusion, the T521D107M025ATE040 KO-CAP capacitor provides an enticing mix of low ESR, stable capacitance, aging resistance, outstanding ripple current handling, compact design, high-frequency performance, and durable reliability. These characteristics make it an excellent choice for a wide range of electronic applications, ensuring efficient and dependable performance even in harsh conditions. The T521D107M025ATE040 is a capacitor that delivers on its promises, whether you’re building cutting-edge technology or looking to improve the performance of existing electronic systems.


The T521D107M025ATE040 KO-CAP capacitor’s versatility makes it appropriate for a wide number of applications, including:

  • DC/DC Converters: Ensuring stable voltage conversion in various electronic devices.
  • Audio/Sound Circuits: Used in mobile phones, base stations, smartphones, MP3 players, and other audio equipment.
  • Power Supply Inputs: Maintaining consistent power supply voltage levels.
  • Portable Electronics: Found in notebook PCs, displays, SSDs, HDDs, USBs, digital cameras, GPS navigation systems, WiFi modules, and more.
  • Telecommunications: Supporting reliable communication equipment.
  • Consumer Electronics: Used in analytical and test equipment, high-speed servers, and more.
  • High Voltage Applications: Suitable for 12V to 48V power input rails.
  • Densely Populated Circuits: Ideal for space-restricted designs.
  • Microprocessor Decoupling: Ensuring stable power supply to microprocessors.
  • High Ripple Current Applications: Used in applications where ripple currents are a concern.

Environmental Compliance

Those who place an emphasis on environmental effect and regulatory compliance will find that the T521D107M025ATE040 KO-CAP capacitor offers reassurance thanks to the environmentally friendly qualities it possesses:

  1. RoHS Compliant: Ensuring compliance when ordered with 100% Sn, Ni-Pd-Au, or non-magnetic 100% Sn solder.
  2. Halogen-Free: Free from halogen-containing compounds, which are known for their environmental hazards.
  3. Epoxy Compliant with UL94 V-0: The epoxy used in these capacitors meets the UL94 V-0 flammability standard.

For a conscientious and compliant electronic solution, select the T521D107M025ATE040 KO-CAP.


In conclusion, the T521D107M025ATE040 KO-CAP capacitor offers a versatile solution, blending various capacitor advantages into one efficient package. Its low ESR, stable capacitance, and eco-friendliness make it a top choice for diverse electronic applications. Whether you’re in telecommunications or portable devices, the KO-CAP family, especially the T521D107M025ATE040 model, guarantees reliability.

To harness its potential, partner with ICRFQ, a leading Chinese electronic component distributor. Contact ICRFQ today to enhance your projects with the T521D107M025ATE040 KO-CAP. Elevate your communication systems now!

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Kevin Chen