687KXM035M Equivalent & Substitute Parts Reference

Part Overview

The 687KXM035M is a 680 µF, 35 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier / Illinois Capacitor. This component is classified as Active product status and is designed for general purpose applications. The part operates across a temperature range of -55°C to 105°C with a rated lifetime of 5000 hours at 105°C. Substitute parts are necessary when inventory availability is limited, when application requirements demand enhanced performance characteristics such as lower ESR or extended lifetime ratings, or when automotive-grade certifications are required for specific end-use applications.

Substiute Parts

687KXM035M

Cornell Dubilier / Illinois CapacitorIn Stock: 967687KXM035M Datasheet

Current PartRFQ

B41866C7687M000

EPCOS - TDK ElectronicsIn Stock: 5262B41866C7687M000 Datasheet

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ELXZ350ELL681MK20S

Chemi-ConIn Stock: 1373ELXZ350ELL681MK20S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 687KXM035M is determined by strict equivalence across the following parameters:

Mandatory Equivalence Criteria:

• Capacitance: 680 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Voltage Rating: 35 V (exact match required)
• Polarization: Polar (exact match required)
• Package Type: Radial, Can (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 0.197" (5.00mm) (exact match required)
• Physical Dimensions: 0.492" Dia (12.50mm) (exact match required)

Performance Parameters (Allowable Variation):

• ESR (Equivalent Series Resistance): Lower values are acceptable
• Lifetime @ Temperature: Equal or extended ratings are acceptable
• Operating Temperature Range: Equal or extended ranges are acceptable
• Ripple Current Ratings: Equal or higher values are acceptable
• Impedance: Lower values are acceptable

All substitute parts listed meet the mandatory equivalence criteria and maintain full mechanical and electrical compatibility with the original 687KXM035M specification.

Parameter Comparison

Engineering Selection Recommendations

B41866C7687M000 (EPCOS - TDK Electronics):

This substitute is suitable for applications requiring extended operating temperature capability up to 125°C. The part maintains Active product status and ROHS3 compliance. The B41866 series is designated for automotive applications, providing enhanced reliability in temperature-sensitive environments. The lower ESR value of 110 mOhm at 100 kHz indicates improved high-frequency performance compared to the original specification.

ELXZ350ELL681MK20S (Chemi-Con):

This substitute offers extended lifetime rating of 7000 hours at 105°C, compared to the 5000-hour rating of the original part. The component carries AEC-Q200 automotive qualification, indicating compliance with automotive-grade reliability standards. The LXZ series demonstrates lower impedance at 38 mOhms, providing superior performance in ripple current handling. Physical height is 0.846" (21.50mm), which is 0.020" shorter than the original specification and remains compatible with standard through-hole PCB layouts.

Both substitute parts maintain full mechanical compatibility with the 687KXM035M footprint and are suitable for direct replacement in through-hole applications where the specified electrical parameters are met.

Frequently Asked Questions (FAQ)

Q: Can B41866C7687M000 be used in place of 687KXM035M in all applications?

A: B41866C7687M000 is mechanically and electrically compatible with 687KXM035M for all applications operating within the -55°C to 105°C range. The extended temperature capability to 125°C provides additional margin in high-temperature environments. Both parts share identical capacitance, voltage rating, tolerance, lead spacing, and package configuration.

Q: What is the difference in height between the substitute parts and the original?

A: The 687KXM035M and B41866C7687M000 both have a maximum seated height of 0.866" (22.00mm). The ELXZ350ELL681MK20S has a maximum seated height of 0.846" (21.50mm), which is 0.020" shorter. This minor difference does not affect PCB layout compatibility for standard through-hole applications.

Q: Are the substitute parts RoHS and REACH compliant?

A: All three parts—687KXM035M, B41866C7687M000, and ELXZ350ELL681MK20S—are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What does AEC-Q200 certification on ELXZ350ELL681MK20S indicate?

A: AEC-Q200 is an automotive industry standard qualification that certifies the component for use in automotive applications. This certification indicates the part has undergone rigorous testing for reliability, temperature cycling, and performance stability in automotive environments.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. All three parts share identical lead spacing of 0.197" (5.00mm), identical diameter of 0.492" (12.50mm), and compatible heights within standard through-hole PCB tolerances. They are mechanically and electrically interchangeable for direct board-level substitution.

Q: Which substitute offers the best performance for high-ripple-current applications?

A: ELXZ350ELL681MK20S demonstrates the lowest impedance at 38 mOhms and offers ripple current ratings of 1.66 A at 100 kHz, providing superior performance in high-frequency ripple current environments compared to the original 687KXM035M specification.