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TAJE686M020SNJ Equivalent & Substitute Parts
Part Overview
The TAJE686M020SNJ is a 68 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 20 V operation in a 2917 (7343 Metric) surface mount package. This component is classified as Active product status and is ROHS3 compliant with MSL 1 (Unlimited moisture sensitivity level). Substitute parts are identified when design requirements permit tolerance relaxation, voltage rating increases, ESR optimization, or alternative manufacturer sourcing while maintaining core electrical and mechanical compatibility.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Capacitance | 68 µF |
| Tolerance | ±20% |
| Voltage Rating | 20 V |
| Package / Case | 2917 (7343 Metric) |
| Type | Molded Tantalum |
| ESR (Equivalent Series Resistance) | 900 mOhm |
| Operating Temperature Range | -55°C to 125°C |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the TAJE686M020SNJ is determined by the following criteria:
Core Compatibility Requirements (Non-Negotiable):
- Capacitance: 68 µF (exact match required)
- Package / Case: 2917 (7343 Metric) (exact match required)
- Mounting Type: Surface Mount (exact match required)
- Operating Temperature Range: -55°C to 125°C (exact match required)
- Type: Molded Tantalum (exact match required)
Allowable Variation Parameters:
- Tolerance: ±20% (original) to ±10% (tighter tolerance acceptable as upgrade)
- Voltage Rating: 20 V (original) to 25 V (higher rating acceptable as upgrade)
- ESR: 900 mOhm (original) to lower values (150 mOhm, 175 mOhm, 400 mOhm acceptable as performance improvements)
- Manufacturer: KYOCERA AVX, Vishay Sprague, KEMET (cross-manufacturer substitution permitted)
- Packaging Format: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel® (format variation permitted)
Substitute parts are grouped by substitution type: tolerance upgrades, voltage upgrades, ESR improvements, and manufacturer alternatives.
Parameter Comparison
| Part Number | Manufacturer | Capacitance | Tolerance | Voltage | ESR (mOhm) | Height (Max) | Packaging | Inventory |
|---|---|---|---|---|---|---|---|---|
| TAJE686M020SNJ | KYOCERA AVX | 68 µF | ±20% | 20 V | 900 | 0.169" (4.30 mm) | Standard | 706 Pcs |
| TAJE686K020RNJ | KYOCERA AVX | 68 µF | ±10% | 20 V | 900 | 0.169" (4.30 mm) | Tape & Reel (TR) | 1148 Pcs |
| TAJE686K025RNJ | KYOCERA AVX | 68 µF | ±10% | 25 V | 900 | 0.169" (4.30 mm) | Cut Tape (CT) & Digi-Reel® | 2380 Pcs |
| TAJE686M025RNJ | KYOCERA AVX | 68 µF | ±20% | 25 V | 900 | 0.169" (4.30 mm) | Cut Tape (CT) & Digi-Reel® | 2400 Pcs |
| TAJY686K020RNJ | KYOCERA AVX | 68 µF | ±10% | 20 V | 900 | 0.079" (2.00 mm) | Tape & Reel (TR) | 5867 Pcs |
| TAJD686M020RNJ | KYOCERA AVX | 68 µF | ±20% | 20 V | 400 | 0.122" (3.10 mm) | Tape & Reel (TR) | 1476 Pcs |
| TPSE686M020R0150 | KYOCERA AVX | 68 µF | ±20% | 20 V | 150 | 0.169" (4.30 mm) | Cut Tape (CT) & Digi-Reel® | 1600 Pcs |
| 293D686X0020E2TE3 | Vishay Sprague | 68 µF | ±20% | 20 V | 600 | 0.170" (4.32 mm) | Tape & Reel (TR) | 1537 Pcs |
| 593D686X0020D2TE3 | Vishay Sprague | 68 µF | ±20% | 20 V | 175 | 0.122" (3.10 mm) | Tape & Reel (TR) | 8978 Pcs |
| 593D686X0020E2TE3 | Vishay Sprague | 68 µF | ±20% | 20 V | 150 | 0.170" (4.32 mm) | Tape & Reel (TR) | 1441 Pcs |
| T491X686M020AT | KEMET | 68 µF | ±20% | 20 V | 700 | 0.169" (4.30 mm) | Tape & Reel (TR) | 1688 Pcs |
Engineering Selection Recommendations
Tolerance Upgrade (±20% to ±10%): TAJE686K020RNJ and TAJY686K020RNJ provide tighter capacitance tolerance while maintaining 20 V rating and 900 mOhm ESR. TAJY686K020RNJ features reduced height (0.079" vs. 0.169"), suitable for space-constrained applications. Both are KYOCERA AVX products with ROHS3 compliance and MSL 1 rating.
Voltage Rating Upgrade (20 V to 25 V): TAJE686K025RNJ and TAJE686M025RNJ increase voltage margin to 25 V while maintaining 68 µF capacitance and 2917 package. TAJE686K025RNJ combines voltage upgrade with ±10% tolerance. Both are ROHS3 compliant with MSL 1 rating and higher inventory availability (2380 and 2400 Pcs respectively).
ESR Optimization: TPSE686M020R0150 (150 mOhm), 593D686X0020E2TE3 (150 mOhm), and 593D686X0020D2TE3 (175 mOhm) reduce ESR significantly from 900 mOhm. TAJD686M020RNJ (400 mOhm) provides moderate ESR reduction. All maintain 68 µF, 20 V, ±20% tolerance, and ROHS3 compliance. ESR reduction improves transient response and reduces heat dissipation.
Cross-Manufacturer Alternatives: Vishay Sprague 293D686X0020E2TE3, 593D686X0020D2TE3, and 593D686X0020E2TE3 provide equivalent electrical specifications with varying ESR profiles. KEMET T491X686M020AT offers 700 mOhm ESR with 2000 Hrs @ 125°C lifetime rating. All cross-manufacturer options maintain ROHS3 compliance and MSL 1 rating.
All substitute parts are Active product status with ROHS3 compliance, REACH Unaffected status, and EAR99 ECCN classification, matching the original part's regulatory profile.
Frequently Asked Questions (FAQ)
Q: Can TAJE686K020RNJ replace TAJE686M020SNJ directly? A: Yes. TAJE686K020RNJ maintains identical capacitance (68 µF), voltage (20 V), package (2917), and ESR (900 mOhm). The tolerance upgrade from ±20% to ±10% is a performance improvement. Packaging format differs (Tape & Reel vs. standard), but electrical compatibility is complete.
Q: What is the benefit of selecting a 25 V rated part for a 20 V application? A: Higher voltage rating provides design margin and extended component lifetime under thermal stress. TAJE686K025RNJ and TAJE686M025RNJ maintain identical capacitance and package while increasing voltage headroom. This is particularly beneficial in applications with voltage transients or thermal cycling.
Q: How does ESR affect circuit performance? A: ESR (Equivalent Series Resistance) determines transient response and heat dissipation. Lower ESR values (150 mOhm vs. 900 mOhm) reduce voltage ripple and improve filtering performance in power supply applications. TPSE686M020R0150 and 593D686X0020E2TE3 provide 6× ESR reduction for noise-sensitive circuits.
Q: Are Vishay Sprague and KEMET parts electrically equivalent? A: Yes, within the specified parameters. 293D686X0020E2TE3, 593D686X0020D2TE3, 593D686X0020E2TE3, and T491X686M020AT all match the core requirements: 68 µF, 20 V, 2917 package, molded tantalum type, and -55°C to 125°C operating range. Differences exist in ESR and height, which must be evaluated against circuit requirements.
Q: Does TAJY686K020RNJ fit in the same PCB footprint? A: TAJY686K020RNJ uses the same 2917 (7343 Metric) package and footprint. However, seated height is reduced to 0.079" (2.00 mm) compared to 0.169" (4.30 mm) for the original part. This is compatible with standard 2917 footprints and beneficial for low-profile designs.
Q: What is the difference between Tape & Reel and Cut Tape packaging? A: Both are surface mount packaging formats suitable for automated assembly. Tape & Reel (TR) is continuous reel format for high-volume production. Cut Tape (CT) & Digi-Reel® is pre-cut format for smaller quantities or mixed-component reels. Electrical performance is identical; selection depends on assembly process and order volume.
Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 (Unlimited) moisture sensitivity rating, matching the original TAJE686M020SNJ regulatory profile.
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