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Home > Products > Capacitors > Tantalum Capacitors > T545W476M020ATE045
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T545W476M020ATE045

In Stock 36245 pcs Reference Price(In US Dollars)
1000+
$1.0485
Manufacturer Part Number:
T545W476M020ATE045
Manufacturer / Brand
KEMET
Part of Description:
CAP TANT SMD POLYMER
Datasheets:
T545W476M020ATE045.pdf
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 36245 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number T545W476M020ATE045
Manufacturer / Brand KEMET
Stock Quantity 36245 pcs Stock
Category Capacitors > Tantalum Capacitors
Description CAP TANT SMD POLYMER
Lead Free Status / RoHS Status: RoHS Compliant
Series *
Package Tape & Reel (TR)
Condition New Original Stock
Warranty 100% Perfect Functions
Lead Time 2-3days after payment.
Payment Credit Card / PayPal / Telegraphic Transfer (T/T) / Western Union
Shipping by DHL / Fedex / UPS / TNT
Port HongKong
RFQ Email Info@IC-Components.com

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



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Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
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Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

What are the key design considerations when integrating the KEMET T545W476M020ATE045 into a high-current DC-DC converter output filter regarding ripple current handling?
The KEMET T545W476M020ATE045 is a 47 µF, 20 V polymer tantalum capacitor in a 2917 package with 45 mΩ ESR at 100 kHz. In DC-DC converter output filtering, engineers calculate the RMS ripple current based on the inductor current waveform and ensure the resulting self-heating stays within the device's thermal limits, typically allowing up to approximately 2 A ripple at 105 °C ambient while keeping core temperature rise controlled to maintain long-term stability.
How does the ESR of the KEMET T545W476M020ATE045 influence power loss and efficiency when used for bulk decoupling in a 12 V to 5 V buck regulator?
With its 45 mΩ ESR, the KEMET T545W476M020ATE045 contributes I_RMS² × ESR power dissipation in the decoupling position. For a typical 1.5 A RMS ripple scenario, this yields around 100 mW loss, which remains manageable on a standard PCB copper plane but requires thermal vias or additional copper area if multiple units operate near maximum ripple or in elevated ambient temperatures.
Can the KEMET T545W476M020ATE045 replace a traditional MnO2 tantalum capacitor of similar capacitance and voltage rating in an existing design, and what circuit changes might be needed?
The KEMET T545W476M020ATE045 can serve as a drop-in replacement for many MnO2 tantalum parts in the 47 µF, 20 V range due to its lower ESR and benign failure mode. Designers often reduce or eliminate external damping resistors previously needed for MnO2 surge current control, while verifying that the improved high-frequency response does not introduce unexpected resonance shifts with the existing layout inductance.
What voltage derating strategy should be applied when selecting the KEMET T545W476M020ATE045 for a 15 V rail in an industrial control system expected to see occasional transients?
On a 15 V nominal rail, the 20 V rating of the KEMET T545W476M020ATE045 provides margin against transients up to roughly 18-19 V peak. Application data for polymer tantalum devices indicates stable operation with 20 % derating above 10 V ratings, allowing the part to handle typical power supply overshoot without parametric drift, provided surge energy remains below the device's tested limits.
Is the KEMET T545W476M020ATE045 suitable for use in automotive under-hood applications with continuous exposure to 105 °C ambient and high vibration?
The KEMET T545W476M020ATE045 operates across -55 °C to 105 °C, with ripple current ratings specified at 105 °C. In vibration-heavy environments, the molded 2917 package provides mechanical stability, though engineers verify board-level strain relief and confirm that the polymer cathode maintains ESR stability after extended high-temperature exposure.
When migrating from a higher-ESR 47 µF/20 V polymer tantalum to the KEMET T545W476M020ATE045, what performance improvements can be expected in transient response?
The 45 mΩ ESR of the KEMET T545W476M020ATE045 reduces output voltage droop during load transients compared to parts with 70-100 mΩ ESR. This results in faster settling times and lower peak deviation in the feedback loop, often allowing a reduction in total output capacitance or enabling tighter regulation windows without changing the control IC compensation.
What configuration or orientation constraints apply when placing multiple KEMET T545W476M020ATE045 capacitors in parallel for higher effective capacitance in a server power distribution network?
Parallel placement of the KEMET T545W476M020ATE045 requires symmetric layout to balance current sharing and minimize loop inductance. The low ESR means even small differences in trace length can shift current distribution, so designers use wide copper pours and sometimes add balancing resistors only if thermal imaging shows uneven heating under full load.
How does long-term operation at elevated temperature affect the leakage current behavior of the KEMET T545W476M020ATE045 in a battery-backed memory retention circuit?
In battery-backed applications, the KEMET T545W476M020ATE045 exhibits low and stable leakage after initial stabilization. Prolonged exposure near 105 °C may cause gradual polymer oxidation that slowly increases ESR over tens of thousands of hours, but leakage typically remains below the datasheet maximum, supporting extended hold-up times without excessive drain.
What are the boundary conditions where the KEMET T545W476M020ATE045 may not be the optimal choice compared to ceramic or aluminum polymer alternatives in high-frequency switching applications?
Above several MHz, the KEMET T545W476M020ATE045 capacitance retention remains strong due to polymer technology, yet very high di/dt edges or extremely low inductance requirements sometimes favor smaller MLCC arrays. In space-constrained designs needing >100 µF effective at 20 V with minimal height, the 2917 package of the T545W476M020ATE045 balances energy density and ESR effectively for most power management ICs.
When considering the KEMET T545W476M020ATE045 for replacement of an older T520 series part in a legacy SSD power rail, what electrical and reliability differences should be evaluated?
The KEMET T545W476M020ATE045 offers higher energy density and lower ESR than many T520 equivalents while maintaining the same 20 V rating and similar case size. Migration typically involves re-validating the derating margin and confirming that the improved ripple capability supports any increase in processor or memory current demands without exceeding the thermal rise limits observed in the original design.

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