T491D107K016AT - 100uF 16V 10% Tantalum Cap | KEMET | 2917
Teilenummer: T491D107K016AT ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0.97 | $0,97 |
| 10 | $0.82 | $8,20 |
| 100 | $0.69 | $69,00 |
| 500 | $0.59 | $295,00 |
| 1.000 | $0.5 | $500,00 |
T491D107K016AT Übersicht
A tantalum capacitor is a type of electrolytic capacitor that uses tantalum metal as the anode and a manganese dioxide (MnO2) or polymer cathode. It belongs to the polarized-capacitor family within passive components, sitting under the hierarchy passive component -> capacitor -> electrolytic capacitor -> tantalum capacitor. Compared to aluminum electrolytics of the same capacitance, tantalum parts deliver higher volumetric efficiency, lower ESR, longer operational life, and stable electrical performance across a wide temperature range, which is why they are widely used in DC power rails, decoupling, and filtering of low-voltage digital circuits.
Key features include 100 uF capacitance, 16 V rated voltage, 10% tolerance, 700 mOhm ESR at 100 kHz/25C, leakage current of 16 uA max at 25C (0.01 CV or 0.5 uA/uF whichever is greater), and a 7.3 mm x 4.3 mm x 2.8 mm molded epoxy body. The part is rated for 2000 hours of continuous load life at 85C at rated voltage, with 1 cycle of -55C to +125C thermal shock per MIL-STD-202. The D-case footprint (EIA 7343-31) is one of the most common tantalum SMD footprints, enabling direct replacement on existing PCB land patterns.
The T491 series uses a sintered tantalum anode pellet with a manganese dioxide cathode coating and a flame-retardant molded epoxy case. Internal construction includes welded tantalum wire leads and silver-loaded epoxy terminations on the anode and cathode faces, with polarity clearly marked on the body by an anode-bar indicator.
Typical applications include DC power-rail bulk decoupling, point-of-load bypass for ASICs, FPGAs and DSPs, low-dropout regulator output filtering, handheld and portable electronics, USB power conditioning, and industrial control boards. The 16 V rating provides comfortable headroom for 12 V rails or post-bridge rectified supplies.
When designing with this part, observe voltage derating: keep steady-state DC voltage at or below 50% of rated voltage for reliability, never reverse-bias, and respect the 125C upper temperature limit. The molded body handles 245C reflow for up to 10 seconds per JEDEC J-STD-020.
Drop-in-Alternativen für T491D107K016AT – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
T491D107K016AS
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
T491D107K010AT
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TAJD107K016RNJ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TAJD107K016SNJ
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
293D107X0016D2TE3
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TR3D227K010C0100
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
T491D107K016AT Grenzwerte & elektrische Eigenschaften
| Capacitance | 100 uF |
| Capacitance Tolerance | +/-10% |
| Rated Voltage (DC) | 16 V |
| ESR (at 100 kHz, 25C) | 700 mOhm |
| Leakage Current (max, 25C) | 16 uA |
| Dissipation Factor (max) | 10% |
| Gehäuse / Bauform | 2917 (7343 Metric) D-case |
| Case Dimensions | 7.3 mm x 4.3 mm x 2.8 mm |
| Montageart | Surface Mount |
| Betriebstemperatur | -55C to +125C |
| Load Life | 2000 hours at 85C, rated voltage |
| Cathode Material | MnO2 (manganese dioxide) |
| Construction | Molded solid tantalum |
| Polarity | Polarized (anode marked) |
| Reflow Compatibility | 245C peak, up to 10 s |
| RoHS-Status | Compliant |
| Manufacturer Series | T491 |
T491D107K016AT Pin-Konfiguration
| Pin 1 | Anode (+) — Positive terminal (marked by anode bar on body) |
| Pin 2 | Cathode (-) — Negative terminal |
Typische Anwendungen
T491D107K016AT ist geeignet für 6 Anwendungs: 12V DC Power-Rail Bulk Decoupling, Point-of-Load Bypass for ASICs/FPGAs, LDO Output Capacitor Filtering, USB Port VBUS Bulk Decoupling, Handheld and Portable Electronics, Industrial Control Board Power Conditioning.
12V DC Power-Rail Bulk Decoupling
The T491D107K016AT's 100 uF capacitance and 16 V rating make it a strong fit for bulk filtering on 12 V DC power distribution in factory automation controllers, industrial sensor backplanes, and 24V-to-12V post-regulator rails. With 700 mOhm ESR at 100 kHz it absorbs switching ripple from upstream buck converters and prevents propagation into downstream analog stages. Mounted close to the regulator output with the anode-bar polarity observed, it sustains load steps up to several hundred mA while staying within the 50% voltage-derating guideline (8 V continuous max).
Empfohlen
Point-of-Load Bypass for ASICs/FPGAs
At 100 uF and 700 mOhm ESR, the T491D107K016AT provides effective low-frequency energy storage at the point-of-load for ASICs, FPGAs, and DSPs that draw sudden transient current during clock-edge or core-state transitions. Placed within 10 mm of the IC supply pin with the anode-bar polarity observed, it supplies instantaneous charge faster than the PCB trace inductance, holding the supply rail within tolerance during di/dt events. The 7343 D-case footprint is one of the most common bulk-bypass footprints in digital design, making layout reuse straightforward.
Empfohlen
LDO Output Capacitor Filtering
The T491D107K016AT is widely used as the bulk output capacitor for low-dropout (LDO) regulators where ESR stability is required within the regulator's ESR window. At 700 mOhm it sits comfortably inside the stability range of most 1 A LDOs that specify ESR from 20 mOhm to 2 Ohm. The 100 uF value attenuates load-transient undershoot and supplies hold-up during momentary load spikes. The molded 7343 D-case survives continuous operation up to 125C, suitable for thermally-constrained industrial enclosures.
Empfohlen
USB Port VBUS Bulk Decoupling
USB 2.0 and USB 3.0 downstream ports draw up to 500 mA (USB 2.0) or 900 mA (USB 3.0) per port, and the T491D107K016AT's 100 uF capacity provides bulk filtering on the VBUS rail. The 16 V rating gives comfortable margin over the 5 V VBUS nominal and tolerates transient spikes during hot-plug events. The 700 mOhm ESR damps ringing on the VBUS rail and provides a low-impedance path for inrush current limiting in conjunction with the upstream current-limit switch. Surface-mount 7343 D-case enables low-profile hub designs.
Empfohlen
Handheld and Portable Electronics
Handheld and battery-powered designs benefit from the T491D107K016AT's 100 uF capacity in a compact 7.3 x 4.3 x 2.8 mm footprint. Used on switched-mode power supply output rails, it provides bulk hold-up during wireless TX bursts (Bluetooth, Wi-Fi, cellular) where the PA can draw 500 mA+ pulses. The MnO2 cathode system and -55C to +125C operating range tolerate cold-start outdoor deployment and warm-pocket handheld thermals. Polarized tantalum with anode bar marking prevents reverse-bias failures in field-installed units.
Empfohlen
Industrial Control Board Power Conditioning
In PLCs, motor-control boards, and industrial sensor interfaces, the T491D107K016AT provides post-bridge-rectifier bulk filtering on 12 V or 15 V rails. The 16 V rating tolerates rectified 12 VAC inputs after the bridge, and the 100 uF value smooths the 100/120 Hz ripple to a level acceptable for downstream analog and digital circuits. The 7343 D-case footprint accepts conformal coating and is compatible with no-clean, lead-free reflow profiles up to 245C peak per JEDEC J-STD-020, easing assembly into IEC 61010-compliant industrial enclosures.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für T491D107K016AT – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | T491D107K016AS | TAJD107K016RNJ | TAJD107K016SNJ | 293D107X0016D2TE3 | TR3D227K010C0100 |
|---|---|---|---|---|---|---|
| Brand | KEMET | KEMET | KYOCERA AVX | KYOCERA AVX | Vishay Intertechnology | Vishay Intertechnology |
| Package | 2917 (7343 D-case) | 2917 (7343 D-case) | 2917 (7343 D-case) | 2917 (7343 D-case) | 2917 (7343 D-case) | 2917 (7343 D-case) |
| Capacitance | 100 uF | 100 uF | 100 uF | 100 uF | 100 uF | 220 uF |
| Rated Voltage (DC) | 16 V | 16 V | 16 V | 16 V | 16 V | 10 V |
| Capacitance Tolerance | +/-10% | +/-10% | +/-10% | +/-10% | +/-10% | +/-10% |
| ESR (max, 100 kHz) | 700 mOhm | 700 mOhm | 700 mOhm | 700 mOhm | 700 mOhm | 100 mOhm |
| Operating Temperature | -55C to +125C | -55C to +125C | -55C to +125C | -55C to +125C | -55C to +125C | -55C to +125C |
| Cathode Technology | MnO2 | MnO2 | MnO2 | MnO2 | MnO2 | MnO2 |
Wichtigste Unterscheidungsmerkmale
- Industry-standard 7343 D-case footprint with broadest cross-brand compatibility (vs. TAJD107K016RNJ (AVX))
- Matte-tin lead-free terminations (AT suffix) for JEDEC J-STD-020 lead-free reflow (vs. TAJD107K016SNJ (AVX, SnPb termination))
- 2000-hour load life at 85C rated voltage with MnO2 cathode stability (vs. Polymer tantalum (e.g. T530 series))
Designhinweise
Apply the 50% voltage-derating rule for MnO2-cathode tantalum capacitors in solid-state designs. For the T491D107K016AT (16 V rating), limit continuous DC voltage to 8 V or less for best reliability; 50-80% derating is acceptable for non-critical applications. Reverse-bias, even momentary, can cause catastrophic failure. Confirm polarity by the anode-bar mark on the body before reflow.
MnO2-cathode tantalum capacitors can fail short if subjected to voltage surge above their surge rating. Series-impedance protection (a 1-3 Ohm resistor or inductor) is recommended at the supply input to limit inrush below the manufacturer's surge-withstand specification. Avoid hot-plug events directly into the capacitor without upstream inrush limiting. The molded 7343 D-case is repairable; failed parts typically exhibit a dark burn mark on the body.
Land-pattern recommendations for the 7343 D-case per IPC-7351: pad length 2.5 mm, pad width 2.8 mm, pad-to-pad pitch 5.0 mm. Use NSMD (non-solder mask defined) pads for best thermal-cycling reliability. Place the part with the anode-bar marking oriented to match the schematic-positive side. Maintain at least 1 mm clearance between the case body and adjacent tall components to avoid shadowing during wave or selective soldering.
Self-heating from ripple current is generally negligible for 100 uF MnO2 tantalum in 7343 D-case at switching frequencies above 20 kHz. However, AC ripple current above 1 A rms can cause measurable temperature rise; verify ripple via the manufacturer's Iac-rated curves in the T491 datasheet. For ripple-critical applications, parallel multiple smaller capacitors instead of one large one to spread thermal dissipation and reduce ESR.
Compliance-Informationen
RoHS compliant per KEMET product environmental compliance page. AT suffix = matte-tin lead-free terminations. AS suffix = gold terminations (legacy/aerospace). Standard T491 series is not AEC-Q200 qualified; automotive-grade is T491A/T491B suffix per KEMET datasheet.
