293D vs TR3 vs 595D: Vishay Tantalum Capacitor Selection Guide
293D vs TR3 vs 595D Comparison
| Parameter | Vishay 293D | Vishay TR3 | Vishay 595D |
| Product position | Standard industrial grade | Low-ESR, high-ripple series | Maximum-CV conformal-coated series |
| Construction | Molded case | Molded case | Conformal coated |
| Capacitance range | 0.10µF to 1000µF | 0.47µF to 1000µF | 0.10µF to 1500µF |
| Voltage range | 4V to 75V DC | 4V to 75V DC | 4V to 50V DC |
| Standard tolerance | ±10%, ±20% | ±10%, ±20% | ±10%, ±20% |
| Operating temperature | −55°C to +125°C | −55°C to +125°C | −55°C to +125°C |
| Voltage derating | Required above +85°C | Required above +85°C | Required above +85°C |
| ESR options | Standard ESR by rating | Multiple selectable ESR grades | ESR varies by rating and case |
| Ripple-current capability | Standard | Highest of the three in comparable ratings | Higher than many standard ratings, but below equivalent TR3 options |
| Moisture sensitivity | MSL 1 | MSL 1 | MSL 2a |
| Typical case style | EIA molded A to E | EIA molded cases including A to E and W | Conformal cases T, S, A, M, B, C, G, D and R |
| Primary advantage | Broad general-purpose selection | Low ESR and high ripple current | High capacitance-to-volume ratio |
| Typical applications | Industrial and general-purpose filtering | Switching power supplies, telecom and computing | High-CV filtering and space-constrained designs |
Vishay 293D: Standard Industrial Tantalum Capacitor
The 293D is the general-purpose option in this comparison. It uses a molded EIA case and provides a broad combination of capacitance and voltage ratings.
It is suitable for:
General power-rail decoupling
Industrial control systems
Telecom infrastructure
Low-frequency filtering
Bulk capacitance
Circuits without demanding ESR requirements
The 293D is normally the first series to consider when the design needs a conventional molded tantalum capacitor and does not require particularly low ESR or high ripple current.
For example, 293D107X0010D2TE3 provides 100µF at 10V in a D case with a maximum ESR of 0.60Ω and a 0.50A maximum ripple-current rating at 100kHz and +25°C.
Vishay TR3: Low ESR and High Ripple Current
The TR3 retains a molded surface-mount construction but is optimized for lower ESR and higher ripple-current capability. Its complete ordering number includes a four-digit ESR code, allowing engineers to select a specific maximum ESR grade.
TR3 is the preferred choice for:
DC/DC converter input and output filtering
Switching power supplies
Processor and FPGA power rails
Telecom equipment
Computers and servers
High-ripple power-rail decoupling
TR3 provides several ESR options for some capacitance, voltage, and case combinations. Lower ESR reduces capacitor heating and output ripple, but the selected ESR must still meet the stability requirements of the power regulator.
A representative part, TR3D107K010C0100, provides 100µF at 10V in a D case with 0.10Ω maximum ESR and a 1.22A ripple-current rating. This is substantially lower ESR and higher ripple capability than the comparable 293D rating.
Vishay 595D: Conformal Coated Maximum-CV Design
The 595D differs physically from 293D and TR3. Instead of a molded case, it uses a conformal-coated construction designed to provide a high capacitance-to-volume ratio.
It is suitable when the design requires:
High capacitance in a compact PCB area
A conformal-coated tantalum package
Capacitance values up to 1500µF
Legacy 595D footprint compatibility
Industrial power filtering
UPS and motor-drive control circuits
Its case-code system and mechanical dimensions differ from standard molded EIA packages. A 595D should therefore not be treated as a footprint-compatible alternative to a 293D or TR3 without checking the land pattern.
For example, 595D107X9010C2T provides 100µF at 10V in a conformal-coated C case, with a maximum ESR of 0.20Ω and a 0.74A ripple-current rating.
100µF 10V Example
| Part Number | Series | Case | Tolerance | Maximum ESR | Maximum Ripple Current |
| 293D107X0010D2TE3 | 293D | Molded D | ±20% | 0.60Ω | 0.50A |
| TR3D107K010C0100 | TR3 | Molded D | ±10% | 0.10Ω | 1.22A |
| 595D107X9010C2T | 595D | Conformal C | ±10% | 0.20Ω | 0.74A |
Frequently Asked Questions
Which has the lowest ESR: 293D, TR3 or 595D?
TR3 generally provides the lowest ESR and highest ripple-current capability among these three series for comparable capacitance, voltage, and package sizes.
What is the main difference between 293D and TR3?
Both use molded SMD packages, but 293D is a standard industrial series while TR3 is specifically optimized for low ESR and higher ripple current.
What is the main advantage of 595D?
The 595D uses conformal-coated construction to maximize capacitance-to-volume ratio and is available in capacitance values up to 1500µF.
Are these polymer tantalum capacitors?
No. 293D, TR3, and 595D are solid tantalum capacitors using an MnO₂ cathode system. For lower ESR polymer technology, consider Vishay series such as T55.
Are the three series automotive qualified?
They should not be assumed to be AEC-Q200 qualified. For automotive applications, select a Vishay series specifically identified as automotive grade and verify qualification for the complete part number.
How should I request a replacement quotation?
Provide the complete part number, required quantity, application voltage, acceptable ESR, package dimensions, and qualification requirements. Stock and replacement options should be confirmed against the latest manufacturer documentation.
