TR3A684K035C4000 Vishay Capacitor Polarised (Capacitor Moulded Polarised) In Stock
Vishay TR3A684K035C4000 is a 0.68 µF 35 V solid tantalum surface mount chip capacitor from the TANTAMOUNT molded case series with 4000 mΩ ESR measured at 100 kHz. Low-profile 1.6 mm height in a case-A SMD package suits decoupling on space-constrained PCBs. In stock at authorized distributors with worldwide shipping.
- Manufacturer
- Vishay
- Package
- Capacitor Moulded Polarised
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- TR3A684K035C4000 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
- 0.68 µF solid tantalum dielectric in a molded case-A SMD package (1.6 mm height) delivers stable capacitance over the -55°C to +125°C operating temperature range with less than 10% capacitance shift versus ceramic alternatives at high bias
- 35 V voltage rating with solid tantalum dielectric provides inherent fail-safe short-circuit behavior, reducing field failure risk in 12 V and 24 V DC power rail decoupling versus wet-slug tantalum capacitors
- ESR of 4000 mΩ at 100 kHz with RoHS-compliant e3 lead-free (Pb-free) termination, qualifying for REACH-compliant assemblies in automotive, industrial, and military electronics
Applications
The TR3A684K035C4000 is used for decoupling and bypass filtering on 5 V to 24 V DC power rails in military electronics, avionics, and industrial control systems where solid tantalum capacitors are preferred over multi-layer ceramics for their volumetric efficiency and stable capacitance under DC bias. Its 0.68 µF capacitance filters mid-frequency noise in the 10 kHz to 1 MHz range on analog power supply rails feeding precision ADCs and op-amps in signal conditioning circuits. The molded case-A SMD package and 35 V rating suit harsh-environment PCB assemblies requiring MIL-PRF-55365 or equivalent solid tantalum capacitor specifications.
Specifications
| Reach Compliance Code | Compliant |
| Factory Lead Time | 13Weeks |
| YTEOL | 8 |
| Additional Feature | ESR AND RIPPLE CURRENT IS MEASURED AT 100KHZ |
| Capacitance | 0.68 µF |
| Capacitor Type | TANTALUM CAPACITOR |
| Dielectric Material | TANTALUM (DRY/SOLID) |
| ESR | 4000mΩ |
| Height | 1.6mm |
| 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, EMBOSSED PLASTIC, 7 INCH |
| Polarity | POLARIZED |
| Positive Tolerance | 10% |
| Rated (DC) Voltage (URdc) | 35V |
| Ripple Current | 56mA |
| Size Code | 1206 |
| Surface Mount | YES |
| Tan Delta | 0.04 |
| Terminal Finish | Matte Tin (Sn) |
| 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 | Israel, Mainland China |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What capacitance and voltage rating does the TR3A684K035C4000 provide, and how stable is the capacitance under DC bias?
The TR3A684K035C4000 provides 0.68 µF capacitance at a 35 V DC working voltage rating with ±10% (K) tolerance. Unlike ceramic capacitors that lose 30-80% capacitance under DC bias near rated voltage, solid tantalum capacitors like TR3A684K035C4000 maintain capacitance within ±5% across the 0-35 V bias range, ensuring reliable decoupling performance on 12 V and 24 V regulated rails.
How does the 4000 mΩ ESR of TR3A684K035C4000 affect ripple current capability and self-heating at 100 kHz?
With 4000 mΩ ESR measured at 100 kHz, the TR3A684K035C4000 ripple current capability is limited by allowable self-heating (typically ΔT = 10°C rise). At 10°C rise, maximum ripple current is approximately √(ΔT / ESR) = √(10 / 4) = 1.58 mA RMS — making this capacitor suitable for low-ripple bypass on analog and digital signal processing rails rather than high-ripple switching converter outputs.
For a -55°C to +125°C military avionics application, how does TR3A684K035C4000 perform compared to an equivalent MLCC?
Solid tantalum capacitors like the TR3A684K035C4000 maintain capacitance within ±10% across the full -55°C to +125°C military temperature range, whereas X7R MLCCs with 0.68 µF can show ±15% variation and additionally lose 40-60% capacitance at 35 V bias. The tantalum's stability makes TR3A684K035C4000 the preferred choice for power rail decoupling in DO-160 and MIL-STD-461 qualified avionics assemblies.
What is the physical size of the TR3A684K035C4000 case-A package, and is it compatible with standard SMT reflow processes?
The TR3A684K035C4000 uses a case-A molded SMD package measuring approximately 3.2 mm × 1.6 mm × 1.6 mm (L × W × H), compatible with standard IPC-7351 land patterns for EIA 3216-18 tantalum capacitors. It supports lead-free reflow soldering with a peak temperature of 260°C per JEDEC J-STD-020, and the e3 RoHS-compliant termination finish ensures compatibility with no-clean and water-wash SMT assembly processes.
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