TC72 Aluminum Electrolytic Capacitor - Equivalent & Substitute Parts

Part Overview

The TC72 is a 10 µF, 450 V aluminum electrolytic capacitor in axial configuration, manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete and is used in general-purpose applications requiring through-hole mounting. Due to its obsolete status, identifying equivalent substitute parts is necessary for design continuity, repair, and procurement purposes. The TC72 operates across a temperature range of -40°C to 85°C with a rated lifetime of 1000 hours at 85°C.

Substiute Parts

TC72

Cornell Dubilier Electronics (CDE)In Stock: 844TC72 Datasheet

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WBR10-450A

Cornell Dubilier Electronics (CDE)In Stock: 1203WBR10-450A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC72 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 10 µF (exact match required)
• Voltage Rating: 450 V (exact match required)
• Tolerance: -10%, +50% (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Configuration: Axial, Can (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

Allowable Variation Parameters:

• ESR: Substitute parts may have ESR values within acceptable engineering limits for the application
• Lifetime @ Temperature: Substitute parts may have extended lifetime ratings (equal or greater than 1000 Hrs @ 85°C)
• Physical Dimensions: Minor variations in diameter and length are acceptable provided the component fits the mounting footprint

The WBR10-450A meets all mandatory matching criteria and qualifies as a direct substitute for the TC72.

Parameter Comparison

Engineering Selection Recommendations

The WBR10-450A is a qualified substitute for the TC72 based on the following engineering criteria:

Electrical Equivalence: Both components share identical capacitance (10 µF), voltage rating (450 V), and tolerance specifications (-10%, +50%). The ESR of the WBR10-450A (20 Ohm @ 120Hz) is marginally higher than the TC72 (17.39 Ohm), representing a 15% increase. This variation remains within acceptable limits for general-purpose applications.

Reliability Enhancement: The WBR10-450A provides extended operational lifetime of 2000 hours at 85°C, compared to the TC72's 1000 hours. This represents a 100% improvement in thermal endurance and is advantageous for long-term reliability.

Compliance Alignment: Both components maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity ratings, ensuring regulatory and environmental compatibility.

Physical Considerations: The WBR10-450A has a smaller diameter (0.520" vs. 0.875") but slightly greater length (1.570" vs. 1.375"). Physical fit verification in the target application is required before final selection.

Procurement Status: Both components are classified as obsolete. The WBR10-450A has higher inventory availability (1177 Pcs vs. 765 Pcs), which may influence procurement decisions.

Frequently Asked Questions (FAQ)

Q: Can the WBR10-450A be used as a direct replacement for the TC72?

A: Yes. The WBR10-450A meets all mandatory electrical and mechanical specifications for substitution: identical capacitance, voltage rating, tolerance, operating temperature range, mounting type, package configuration, and RoHS compliance. Physical dimensions differ slightly; verify fit in the target application.

Q: What is the significance of the ESR difference between TC72 and WBR10-450A?

A: The WBR10-450A has an ESR of 20 Ohm @ 120Hz compared to the TC72's 17.39 Ohm. This 15% increase is within acceptable engineering tolerances for general-purpose applications. Applications with strict ripple current or thermal dissipation requirements should evaluate this parameter against circuit specifications.

Q: Why does the WBR10-450A have a longer lifetime rating?

A: The WBR10-450A is rated for 2000 hours at 85°C versus the TC72's 1000 hours. This reflects improved internal construction or materials in the WBR series. The extended lifetime provides enhanced reliability without compromising electrical performance.

Q: Are there physical dimension constraints for substitution?

A: Yes. The WBR10-450A has a smaller diameter (0.520" vs. 0.875") but greater length (1.570" vs. 1.375"). Verify that the target PCB layout and mechanical enclosure accommodate these dimensional changes before implementation.

Q: Do both components have the same compliance certifications?

A: Yes. Both TC72 and WBR10-450A are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity ratings. No compliance barriers exist for substitution.

Q: What ripple current specifications apply to the WBR10-450A?

A: The WBR10-450A is rated for 58 mA @ 120 Hz (low frequency) and 75.4 mA @ 100 kHz (high frequency). Verify these values against circuit ripple current requirements to ensure adequate performance margin.