T491A105M020AT Kemet Capacitor Polarised (Other) In Stock
Kemet T491A105M020AT is a 1 µF tantalum electrolytic capacitor rated at 20 V in a molded SMD 1206 case A package. It uses MnO2 solid electrolyte for reliable polarized energy storage. Competitively priced and available from stock with worldwide shipping.
- Manufacturer
- Kemet
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- T491A105M020AT Datasheet PDF
- Category
- Capacitor Polarised
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1 µF / 20 V solid MnO2 tantalum capacitor with low ESR for stable power rail decoupling
- Compact molded SMD case A (1206) footprint optimized for automated pick-and-place assembly
- Wide operating temperature range suitable for industrial and automotive-grade power supply designs
Applications
The T491A105M020AT is commonly used in bulk decoupling and energy-storage roles on 12 V and 15 V power supply rails where a 20 V, 1 µF tantalum provides low ESR and stable capacitance over temperature. It fits point-of-load converter output filtering in telecommunications equipment and industrial control boards. The molded SMD package simplifies high-volume reflow assembly while the MnO2 electrolyte delivers long operational lifetime.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What are the capacitance and voltage rating of the T491A105M020AT?
The T491A105M020AT is a 1 µF tantalum capacitor rated at 20 V DC working voltage with ±20% capacitance tolerance. Its solid MnO2 electrolyte delivers low equivalent series resistance, making it effective for decoupling on 12 V and 15 V power rails in both consumer and industrial electronics.
Which power supply filtering applications benefit most from the T491A105M020AT?
Point-of-load converters, voltage regulator output filters, and input bypass networks on 5 V to 15 V rails benefit from this 1 µF / 20 V MnO2 tantalum. The low ESR characteristic reduces voltage ripple effectively, and the case A SMD footprint fits densely populated PCBs in telecommunications, industrial automation, and embedded computing modules.
How does the T491A105M020AT compare to a MLCC of the same capacitance at 20 V?
Unlike X5R or X7R MLCCs, which can lose up to 80% capacitance under DC bias at 20 V with a 1 µF rating, the T491A105M020AT maintains its rated 1 µF across the full operating voltage range. The tantalum construction also provides tighter capacitance stability over temperature from -55°C to +125°C, an advantage for precision timing and filtering circuits.
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