TCX142U030J2C Equivalent & Substitute Parts

Part Overview

The TCX142U030J2C is a 1400 µF, 30 V aluminum electrolytic capacitor in axial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, indicating discontinued production and limited availability for new designs. The part operates across a temperature range of -55°C to 105°C with a rated lifetime of 2000 hours at 105°C, suitable for general-purpose applications requiring stable capacitance and moderate ripple current handling.

Due to its obsolete status, identifying equivalent substitute parts is essential for design continuity, procurement reliability, and long-term system support. Substitute parts must maintain functional equivalence in capacitance, voltage rating, and physical form factor while meeting or exceeding performance specifications.

Substiute Parts

TCX142U030J2C

Cornell Dubilier Electronics (CDE)In Stock: 937TCX142U030J2C Datasheet

Current PartRFQ

B41689A7148Q001

EPCOS - TDK ElectronicsIn Stock: 1054B41689A7148Q001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TCX142U030J2C is determined by the following criteria:

Mandatory Matching Parameters:

• Capacitance value: 1400 µF (exact match required)
• Polarization: Polar (electrolytic type maintained)
• Package / Case: Axial, Can (physical compatibility)
• Mounting Type: Through Hole (assembly compatibility)

Allowable Variation Parameters:

• Voltage - Rated: Substitute must be ≥ 30 V (higher voltage ratings are acceptable and provide design margin)
• Operating Temperature: Substitute must cover the required range or extend it (minimum -55°C to 105°C)
• ESR and Ripple Current: Substitutes with lower ESR and higher ripple current ratings improve performance
• Lifetime @ Temperature: Substitutes with extended lifetime ratings enhance reliability
• Tolerance: Variation in tolerance is acceptable provided the substitute meets circuit requirements

The substitute part B41689A7148Q001 meets all mandatory matching criteria and exceeds performance specifications in voltage rating, operating temperature range, and lifetime rating.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The B41689A7148Q001 is a functional equivalent to the TCX142U030J2C based on matching capacitance, voltage rating, package type, and mounting configuration. The substitute part is suitable for direct replacement in applications where the following conditions are met:

1. Voltage Margin: The substitute's 40 V rating exceeds the 30 V requirement, providing additional design margin and improved reliability.

2. Temperature Performance: The extended operating range (-55°C to 125°C) and significantly longer lifetime (10000 hours at 125°C versus 2000 hours at 105°C) enhance system reliability and support extended service life.

3. Compliance Status: The substitute is ROHS3 compliant and in active production, ensuring regulatory compliance and long-term procurement availability. The main part's obsolete status and RoHS non-compliance make the substitute preferable for new designs and ongoing production.

4. Physical Compatibility: The substitute is physically smaller (0.709" Dia x 1.535" L versus 0.750" Dia x 2.125" L). Verify that the reduced dimensions do not conflict with existing PCB layout, mounting hardware, or thermal management considerations.

5. ESR Consideration: The substitute exhibits higher ESR (235 mOhm @ 100Hz versus 75 mOhm @ 120Hz). In applications with stringent ripple current or thermal constraints, evaluate whether the higher ESR impacts circuit performance or component temperature rise.

Recommendation: The B41689A7148Q001 is approved as a substitute for the TCX142U030J2C, provided physical fit and ESR performance are validated for the specific application.

Frequently Asked Questions (FAQ)

Q1: Can the B41689A7148Q001 be used as a direct drop-in replacement for the TCX142U030J2C?

A: The B41689A7148Q001 is electrically compatible and functionally equivalent. However, verify physical fit on the PCB, as the substitute is smaller (0.709" Dia x 1.535" L versus 0.750" Dia x 2.125" L). Confirm that lead spacing and mounting hole alignment are compatible with existing board design.

Q2: Why does the substitute have a higher voltage rating (40 V versus 30 V)?

A: Higher voltage ratings provide design margin and improve component reliability by reducing electrical stress. This is an acceptable and beneficial variation for substitution purposes.

Q3: The substitute has higher ESR (235 mOhm versus 75 mOhm). Does this affect circuit performance?

A: Higher ESR increases impedance and can affect ripple current handling and thermal performance. Evaluate the specific application's ripple current requirements and thermal environment. The substitute's higher ripple current capability (7.1 A @ 10 kHz) may offset the ESR increase in many applications.

Q4: What is the significance of the substitute being ROHS3 compliant while the main part is not?

A: ROHS3 compliance indicates the substitute meets current environmental and regulatory standards for electronic components. This is advantageous for new designs, export markets, and long-term regulatory compliance.

Q5: The substitute has a much longer lifetime rating (10000 hours at 125°C versus 2000 hours at 105°C). What does this mean?

A: The substitute is rated for significantly longer service life under more demanding thermal conditions. This indicates superior component reliability and is a beneficial improvement over the main part.

Q6: Is the smaller physical size of the substitute a concern?

A: The smaller size is generally beneficial for space-constrained designs. However, verify that the reduced dimensions do not interfere with PCB layout, component spacing, or thermal management. Confirm lead spacing compatibility with existing mounting holes.

Q7: Why is the main part listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The substitute, being in active production, ensures long-term availability and supports ongoing procurement for maintenance and new production runs.

Q8: Are there any applications where the TCX142U030J2C cannot be substituted with the B41689A7148Q001?

A: Substitution is not recommended if the application requires the exact physical dimensions of the original part or if the higher ESR of the substitute creates unacceptable thermal or performance constraints. Evaluate ESR impact in high-ripple-current or thermally sensitive applications.