Product Overview – KEMET T495D336K025ZTE150
The KEMET T495D336K025ZTE150 is a molded surface-mount tantalum capacitor designed around a manganese dioxide (MnO₂) cathode system. It offers a nominal capacitance of 33 µF with a capacitance tolerance of ±10% at a rated voltage of 25 V.
Belonging to the B450 MnO₂ tantalum capacitor family, the KEMET T495D336K025ZTE150 combines low equivalent series resistance (ESR) with a surge-robust construction in a compact SMD package. The part is specified as “Low ESR, Surge Robust” and carries an ESR rating of 150 mΩ at 100 kHz, aligning it with applications that demand stable high-frequency decoupling and filtering performance.
In standard case coding, the KEMET T495D336K025ZTE150 corresponds to the 2917 (7343 metric) size and a maximum component height of 3.1 mm, enabling density-oriented PCB layouts while maintaining adequate volumetric efficiency for a 25 V, 33 µF device.
Electrical Characteristics and Performance of KEMET T495D336K025ZTE150
The core electrical parameters of the KEMET T495D336K025ZTE150 define its suitability in a wide range of low- to medium-power designs:
- Capacitance: 33 µF
- Capacitance tolerance: 10% (K code)
- Rated voltage: 25 V
- Technology: Solid tantalum capacitor with MnO₂ cathode
- ESR: 150 mΩ at 100 kHz
The 25 V rating gives the KEMET T495D336K025ZTE150 headroom in typical low-voltage DC systems such as 5 V, 12 V, and 15 V rails, where designers typically apply a derating margin between the operating voltage and the capacitor’s rated voltage. For example, in a 12 V rail with occasional transient excursions, the 25 V rating of the KEMET T495D336K025ZTE150 helps accommodate those conditions when used within standard derating guidelines.
The ±10% tolerance supports designs requiring tighter control of effective capacitance without incurring the larger spread associated with wider tolerance devices. This is useful in timing circuits, filtered reference lines, or where capacitance consistency between units contributes to predictable system behavior.
The MnO₂-based construction of the KEMET T495D336K025ZTE150 is a traditional solid tantalum technology, favoring stability and long-term reliability in applications where operating conditions remain within specified limits and appropriate derating is observed.
Package, Size and Mechanical Features of KEMET T495D336K025ZTE150
The KEMET T495D336K025ZTE150 is supplied in a molded, surface-mount device format. Its mechanical characteristics are summarized as:
- Case style: Molded SMD, tantalum
- Case size: 2917 (7343 metric)
- Maximum height: 3.1 mm
The 2917/7343 footprint is well established for tantalum capacitors, allowing straightforward footprint reuse across multiple designs. The relatively low maximum height of the KEMET T495D336K025ZTE150 makes it suitable for applications with moderate profile constraints, such as compact power modules or communication boards, while still providing 33 µF at 25 V.
The molded encapsulation of the KEMET T495D336K025ZTE150 provides mechanical robustness for automated assembly, including pick-and-place handling and standard lead-free reflow solder profiles, when implemented according to KEMET’s general guidelines for tantalum SMD components.
In practical PCB layouts, the lateral dimensions of the KEMET T495D336K025ZTE150 support use as a central bulk decoupling element near voltage regulators, DC/DC converter outputs, or at key distribution nodes, with room for additional smaller-value, lower-ESR capacitors to be placed in parallel when needed.
Low ESR Behavior of KEMET T495D336K025ZTE150 in High-Frequency Applications
The KEMET T495D336K025ZTE150 is specified with an ESR of 150 mΩ at 100 kHz. This low ESR behavior contributes significantly to its performance in decoupling and filtering roles:
- Reduction of voltage ripple on regulated power rails
- Improved transient response when load current changes rapidly
- Lower internal heating during ripple current flow
For example, in a 12 V DC/DC converter output stage that switches at several hundred kilohertz, the KEMET T495D336K025ZTE150 can be placed on the output rail to mitigate ripple. The 150 mΩ ESR at 100 kHz allows the capacitor to absorb and supply current pulses more effectively than higher-ESR alternatives. This reduces the peak-to-peak ripple and stabilizes the rail in conjunction with the converter’s control loop.
When multiple KEMET T495D336K025ZTE150 capacitors are placed in parallel, the effective ESR is reduced further, because the ESR behaves approximately as parallel resistances. This technique is often used in high-current or noise-sensitive nodes where a single device does not meet ripple or transient requirements.
Surge Robust Design of KEMET T495D336K025ZTE150
The KEMET T495D336K025ZTE150 is characterized as a “Surge Robust” MnO₂ tantalum capacitor, positioning it for use in circuits where turn-on surges or transient events are present, provided that design guidelines are observed.
In practice, surge robust behavior in a MnO₂ tantalum capacitor like the KEMET T495D336K025ZTE150 is valuable in:
- Input filtering for power rails that experience inrush when supplies are enabled
- Nodes subject to intermittent connection, such as hot-plugged subassemblies (within specified limits)
- Circuits where line conditions or overshoot can generate short-duration voltage spikes beneath the rated voltage
As an example, consider a 24 V nominal industrial supply that is regulated down to 12 V on-board. During power-up, transient overshoots can occur on the 12 V rail. When used in such conditions with appropriate derating and network design, the surge robust attributes of the KEMET T495D336K025ZTE150 provide an added margin against damage during these events, compared with generic tantalum devices not characterized for surge robustness.
Application Considerations for KEMET T495D336K025ZTE150 in Power and Signal Circuits
The KEMET T495D336K025ZTE150 33 µF, 25 V, low-ESR, molded tantalum capacitor lends itself to several practical application scenarios:
1. Output filtering on low- to medium-power DC/DC converters
The capacitance and ESR values of the KEMET T495D336K025ZTE150 suit it for smoothing converters in the 5–15 V output range. Its low ESR enhances control loop stability when coordinated with the converter’s compensation design and other output capacitors.
2. Bulk decoupling for distributed 12 V and 5 V rails
As a central bulk capacitor at the entry point of a local power domain, the KEMET T495D336K025ZTE150 can help maintain stable voltage during local load transients. For example, near a microcontroller cluster or communication module, it can provide energy buffering for simultaneous switching events.
3. Intermediate filtering in analog and mixed-signal circuits
In audio, sensor, or RF support circuitry powered from 5–15 V rails, the KEMET T495D336K025ZTE150 can be used in conjunction with ceramic capacitors to form multi-stage filters, where the tantalum provides mid-frequency damping and bulk energy, and ceramics handle high-frequency noise.
4. Space-constrained power modules with limited height
With a maximum height of 3.1 mm, the KEMET T495D336K025ZTE150 fits board spaces where height is limited but where a single device with 33 µF at 25 V is needed to simplify BOM and layout.
Because the KEMET T495D336K025ZTE150 is an MnO₂-based tantalum device, standard design practices apply: appropriate derating of working voltage, current ripple considerations, and avoidance of reverse voltage are recommended. Within those constraints, the low ESR and surge robust features contribute to stable and predictable power behavior.
Lifecycle and Sourcing Considerations for KEMET T495D336K025ZTE150
The KEMET T495D336K025ZTE150 is identified as an obsolete part number in the provided technical information. This lifecycle status has several implications for design and procurement:
- New designs: The KEMET T495D336K025ZTE150 is generally better suited for maintenance of legacy systems rather than as a primary choice for new platforms, unless confirmed current availability and long-term support can be secured through KEMET’s product line documentation or official channels.
- Existing designs: For assemblies already qualified with the KEMET T495D336K025ZTE150, lifecycle status encourages planning for last-time buy strategies, evaluation of footprint-compatible alternatives, or cross-referencing within the broader T495 or B450 families if equivalent or improved parameters are available.
- Form, fit, function considerations: When replacing the KEMET T495D336K025ZTE150, attention should be paid to the 33 µF value, 25 V rating, 2917 (7343) footprint, low ESR and surge robust behavior. Any substitute should be evaluated both electrically and mechanically to preserve circuit performance.
For inventory planning, the combination of 33 µF, 25 V rating, 2917 package, low ESR, and MnO₂ technology defines the functional profile of the KEMET T495D336K025ZTE150 and aids in structured cross-referencing.
Conclusion – Positioning KEMET T495D336K025ZTE150 in New and Existing Designs
The KEMET T495D336K025ZTE150 is a molded SMD MnO₂ tantalum capacitor offering 33 µF at 25 V in a 2917 (7343) package with a maximum height of 3.1 mm and an ESR of 150 mΩ at 100 kHz. Its combination of low ESR performance and surge robust design supports roles in output filtering, bulk decoupling, and mixed-signal power conditioning.
For ongoing designs, the KEMET T495D336K025ZTE150 provides a defined electrical and mechanical benchmark: 33 µF, 25 V, low ESR, surge robust, 2917 footprint. For future projects or redesigns where this device has been used, these parameters form the basis for evaluating either continued sourcing, if available, or selection of compatible alternatives within KEMET’s portfolio or comparable product lines.
Frequently Asked Questions (FAQ)
- Q1. What are the key electrical ratings of the KEMET T495D336K025ZTE150?
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- A1. The KEMET T495D336K025ZTE150 is a 33 µF molded tantalum capacitor with a rated voltage of 25 V and a capacitance tolerance of ±10%. It is built with a MnO₂ cathode system and is specified with an ESR of 150 mΩ at 100 kHz. These parameters define its use in low- to medium-voltage power rails and decoupling applications.
- Q2. What package and size does the KEMET T495D336K025ZTE150 use?
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- A2. The KEMET T495D336K025ZTE150 is supplied in a molded SMD tantalum package with a case code 2917 (7343 metric). The maximum component height is 3.1 mm. This standard footprint helps when designing or retrofitting PCBs that use 2917 tantalum capacitors.
- Q3. How does the low ESR of the KEMET T495D336K025ZTE150 affect power supply design?
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- A3. The 150 mΩ ESR at 100 kHz of the KEMET T495D336K025ZTE150 enhances ripple reduction and load transient performance on power rails. In a DC/DC converter output, this low ESR allows the capacitor to more effectively source and sink fast-changing currents, which reduces voltage ripple and contributes to control loop stability when the converter is compensated with this ESR profile in mind.
- Q4. What does “surge robust” mean for the KEMET T495D336K025ZTE150?
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- A4. The KEMET T495D336K025ZTE150 is described as “Surge Robust,” indicating that its MnO₂ tantalum construction and design are tailored to tolerate surge and inrush conditions better than standard tantalum devices not characterized this way, when applied within specified derating and operating guidelines. In practice, it can be used on rails where power-on surges or short-duration transients occur, provided that the applied voltage and surge energy remain within recommended design limits.
- Q5. In which typical applications can the KEMET T495D336K025ZTE150 be used?
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- A5. Typical uses of the KEMET T495D336K025ZTE150 include output filtering on 5–15 V DC/DC converters, bulk decoupling on distributed 12 V and 5 V rails, and intermediate filtering stages in analog and mixed-signal sections. Its 33 µF capacitance, 25 V rating, low ESR, and 2917 package support deployment as a primary bulk capacitor near regulators or power entry points in many board-level designs.
- Q6. How does the KEMET T495D336K025ZTE150 compare with ceramic capacitors in decoupling roles?
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- A6. The KEMET T495D336K025ZTE150, as a 33 µF MnO₂ tantalum capacitor with 150 mΩ ESR at 100 kHz, provides higher capacitance density and controlled ESR compared to many ceramic capacitors of similar size. Ceramics often deliver lower ESR at very high frequencies but may exhibit capacitance variation with voltage and temperature. The KEMET T495D336K025ZTE150 is often used in combination with ceramics: the tantalum handles bulk energy and mid-frequency damping, while ceramics address high-frequency noise.
- Q7. Is the KEMET T495D336K025ZTE150 suitable for height-constrained designs?
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- A7. The KEMET T495D336K025ZTE150 has a maximum height of 3.1 mm, which allows it to be considered for designs with moderate height constraints. It provides 33 µF at 25 V in a relatively flat 2917 form factor, making it usable in many enclosures where component height must be controlled but where some vertical space is still available.
- Q8. What should be considered when replacing the KEMET T495D336K025ZTE150 in an existing design?
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- A8. When replacing the KEMET T495D336K025ZTE150, considerations include matching or exceeding the 33 µF capacitance and 25 V rating, ensuring compatibility with the 2917 (7343) footprint and maximum 3.1 mm height, and achieving comparable or better ESR and surge robust behavior. Any alternative should be validated in-circuit, particularly in power sections where ESR, surge performance, and ripple handling are important to system stability.
- Q9. What is the lifecycle status of the KEMET T495D336K025ZTE150 and how does that affect planning?
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- A9. The KEMET T495D336K025ZTE150 is indicated as obsolete in the referenced technical information. For existing products using this capacitor, it is advisable to plan for last-time buys if inventory is still available and to begin identifying and qualifying form-fit-function compatible substitutes. For new designs, it is generally advisable to confirm current KEMET offerings with similar electrical and mechanical characteristics or select a current-production alternative.
- Q10. How does the KEMET T495D336K025ZTE150 behave in parallel configurations?
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- A10. When multiple KEMET T495D336K025ZTE150 capacitors are placed in parallel, the effective capacitance is the sum of individual capacitances (e.g., two devices yield approximately 66 µF), and the effective ESR decreases because individual ESR values are in parallel. This can be used to further reduce output ripple and improve transient performance on power rails, as long as the combined arrangement still adheres to the rated voltage and operating conditions for each capacitor.
