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
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
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.
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