TAJT105K020RNJ AVX Capacitor Polarised (Capacitor Moulded Polarised) In Stock
AVX TAJT105K020RNJ is a 1 µF, 20 V solid MnO2 tantalum electrolytic SMD capacitor in the T case with ±10% tolerance and 9000 mΩ ESR measured at 100 kHz. Its compact 1.2 mm height and moulded polarised package make it ideal for space-constrained power supply decoupling. Available from authorized distributors with worldwide shipping.
- Manufacturer
- AVX
- Package
- Capacitor Moulded Polarised
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- TAJT105K020RNJ Datasheet PDF
- Category
- Capacitor Polarised
- Price
- From $0.2540(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TAJT105K020RNJ?
- 1 µF / 20 V solid MnO2 tantalum capacitor in T case (3.5 mm × 2.8 mm) with ±10% tolerance for reliable SMD power supply decoupling
- 9000 mΩ ESR measured at 100 kHz enabling stable low-frequency bypass filtering in voltage regulator output stages
- RoHS and REACH compliant lead-free construction with 1.2 mm low-profile height for compact portable and industrial electronics designs
What is TAJT105K020RNJ used for?
The TAJT105K020RNJ is used as a bulk decoupling and bypass capacitor on the output rails of LDO regulators and DC-DC converters in portable consumer electronics, wearables, and industrial sensor nodes where a stable 1 µF, 20 V tantalum capacitor is needed in a compact T-case footprint. Its solid MnO2 dielectric ensures safe fail-open behaviour compared to wet-electrolyte tantalum capacitors, making it suitable for medical device power supplies and automotive-adjacent industrial applications. The low 1.2 mm profile allows integration into thin-profile PCB assemblies such as smartcard modules and compact IoT gateway boards.
What are the specifications of TAJT105K020RNJ?
| Pbfree Code | Yes |
| Reach Compliance Code | Compliant |
| Factory Lead Time | 25Weeks |
| YTEOL | 10 |
| Additional Feature | ESR AND RIPPLE CURRENT IS MEASURED AT 100KHZ |
| Capacitance | 1 µF |
| Capacitor Type | TANTALUM CAPACITOR |
| Dielectric Material | TANTALUM (DRY/SOLID) |
| ESR | 9000mΩ |
| Height | 1.2mm |
| JESD-609 Code | e3 |
| Leakage Current | 0.0005mA |
| Mounting Feature | SURFACE MOUNT |
| Negative Tolerance | 10% |
| Package Shape | RECTANGULAR PACKAGE |
| Package Style | SMT |
| Packing Method | TR, PLASTIC, 7 INCH |
| Polarity | POLARIZED |
| Positive Tolerance | 10% |
| Rated (DC) Voltage (URdc) | 20V |
| Ripple Current | 38mA |
| Size Code | 1210 |
| Surface Mount | YES |
| Tan Delta | 0.04 |
| Terminal Finish | Matte Tin (Sn) - with Nickel (Ni) barrier |
| Terminal Shape | J BEND |
| Package | Capacitor Moulded Polarised |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8532.21.00.50 |
| Country of Origin | Czechia, El Salvador |
Where can I find the TAJT105K020RNJ datasheet?
TAJT105K020RNJ Datasheet DownloadOfficial datasheet from AVX
What are equivalent replacements for TAJT105K020RNJ?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the ESR of the TAJT105K020RNJ and at what frequency is it specified, and how does this affect decoupling performance?
The TAJT105K020RNJ has an ESR of 9000 mΩ (9 Ω) measured at 100 kHz. This relatively high ESR limits its effectiveness for high-frequency switching noise filtering above 1 MHz, but it provides stable low-frequency bulk decoupling for LDO regulator outputs at switching rates below 100 kHz. For designs requiring lower ESR at high frequencies, a parallel ceramic capacitor of 100 nF or smaller is typically added to cover the high-frequency range.
What voltage rating and capacitance does the TAJT105K020RNJ provide, and what derating practice should be applied?
The TAJT105K020RNJ is rated at 1 µF capacitance and 20 V DC. Industry practice for solid tantalum capacitors recommends operating at no more than 50% of the rated voltage, so 10 V is the practical working voltage limit for this component. This derating ensures long-term reliability and prevents voltage-stress-induced failures in power supply decoupling applications on 5 V or 3.3 V rails with transient overshoot up to 10 V.
How does the solid MnO2 construction of the TAJT105K020RNJ compare to wet-electrolyte tantalum capacitors for safety-critical applications?
Solid MnO2 tantalum capacitors such as the TAJT105K020RNJ fail open rather than short, unlike wet-electrolyte tantalum types that can short and ignite under overvoltage. This fail-open characteristic makes the TAJT105K020RNJ a safer choice for medical device power rails and industrial control systems where a shorted decoupling capacitor on a 20 V rail could cause downstream damage or safety incidents. The solid dielectric also eliminates electrolyte drying concerns that limit wet tantalum reliability at elevated temperatures.
What T case dimensions does the TAJT105K020RNJ use and how does it fit a compact IoT PCB layout?
The TAJT105K020RNJ uses the EIA T case (approximately 3.5 mm × 2.8 mm footprint) with a 1.2 mm maximum body height. This compact outline fits easily on IoT sensor and gateway PCBs alongside small SMD regulators, and the 1.2 mm height is well within the clearance of most low-profile enclosures. Compared to an 0805 ceramic capacitor, the T case is larger but provides 1 µF at 20 V in a polarised tantalum construction not achievable in an 0805 ceramic at that voltage.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About AVX
AVX is a leading electronic component manufacturer. FindMyChip sources AVX ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.0500 | $1.05 |
| 100+ | $0.5506 | $55.06 |
| 125+ | $0.3150 | $39.38 |
| 250+ | $0.2780 | $69.50 |
| 375+ | $0.2540 | $95.25 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”
You May Also Like
ECASD41A106M055K00
Murata Electronics
Capacitor Polarised
TM3C106K020CBA
Vishay
Capacitor Polarised
TR3D476K025C0100
Vishay
Capacitor Polarised
TM3D336K016CBA
Vishay
Capacitor Polarised
TM3C106K016CBA
Vishay
Capacitor Polarised
TM3C476K016CBA
Vishay
Capacitor Polarised
TM3D476K016CBA
Vishay
Capacitor Polarised
TM3B226K016CBA
Vishay
Capacitor Polarised
T322E106K050AT7200
Kemet
Capacitor Polarised
T522Y477M006ATE035
Kemet
Capacitor Polarised
T491A475M010AT
Kemet
Capacitor Polarised
T498C106K025ATE1K1
Kemet
Capacitor Polarised
T495A475K010ATE1K4
Kemet
Capacitor Polarised
T498B336K006ATE1K7
Kemet
Capacitor Polarised
T495A685K006ATE1K8
Kemet
Capacitor Polarised
T490T476M010ATE1K0
Kemet
Capacitor Polarised
EEU-FM1H101BJ
Panasonic
Capacitor Polarised
EMVY500ADA470MF80G
United Chemi-Con
Capacitor Polarised
EEU-EE2W470
Panasonic
Capacitor Polarised
861101486026
Würth Elektronik
Capacitor Polarised
861221486023
Würth Elektronik
Capacitor Polarised
EEE-FK1E470AP
Panasonic
Capacitor Polarised
UFG1H100MDM
Nichicon
Capacitor Polarised
16PX47MEFC5X11
Rubycon
Capacitor Polarised