SXR680M100ST Equivalent & Substitute Parts

Part Overview

The SXR680M100ST is a 68 µF, 100 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates across a temperature range of -40°C to 105°C with a rated lifetime of 4000 hours at 105°C, suitable for general-purpose applications requiring stable capacitance and low equivalent series resistance.

Substiute Parts

SXR680M100ST

Cornell Dubilier Electronics (CDE)In Stock: 910SXR680M100ST Datasheet

Current PartRFQ

EEU-FS2A680

Panasonic Electronic ComponentsIn Stock: 3203EEU-FS2A680 Datasheet

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EKZE101ELL680MJ16S

Chemi-ConIn Stock: 3913EKZE101ELL680MJ16S Datasheet

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UCS2D680MHD1TO

NichiconIn Stock: 1198UCS2D680MHD1TO Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SXR680M100ST is determined by strict equivalence in the following parameters: capacitance value (68 µF), tolerance (±20%), rated voltage (100 V or higher), polarization (polar), mounting type (through hole), and package configuration (radial, can). All substitute parts must maintain the same lead spacing (0.197" / 5.00 mm) to ensure mechanical compatibility with existing PCB layouts.

The substitute parts are grouped into two categories:

Direct Voltage Equivalents (100 V rated): Parts with identical 100 V voltage rating provide direct functional replacement with equivalent electrical performance.

Higher Voltage Rated Parts (200 V rated): Parts rated at 200 V can substitute for 100 V applications due to voltage derating principles, providing enhanced reliability margin and extended operational lifetime.

All substitute parts listed maintain ROHS3 compliance and operate within the same temperature range (-40°C to 105°C), ensuring regulatory and thermal compatibility.

Parameter Comparison

Engineering Selection Recommendations

EEU-FS2A680 (Panasonic FS-A Series): This part provides direct voltage equivalence at 100 V with doubled lifetime rating (8000 hours at 105°C versus 4000 hours). The part is active in production status, ensuring long-term availability. Lead spacing and package dimensions match the original SXR680M100ST exactly. This substitute is suitable for applications where extended operational lifetime is beneficial without requiring increased voltage margin.

EKZE101ELL680MJ16S (Chemi-Con KZE Series): This part maintains identical voltage rating (100 V) and lifetime specification (4000 hours at 105°C) as the original component. The part is active in production status. Physical dimensions are compatible with the original layout. This substitute provides functional equivalence with minimal design impact.

UCS2D680MHD1TO (Nichicon UCS Series): This part is rated at 200 V, providing a 2× voltage derating margin over the original 100 V specification. The part features the longest lifetime rating (10000 hours at 105°C) and is active in production status. The physical diameter increases from 10.00 mm to 12.50 mm, requiring verification of available PCB space. This substitute is appropriate for applications requiring enhanced reliability and voltage margin, provided mechanical clearance is confirmed.

All three substitute parts maintain ROHS3 compliance and operate within the specified temperature range, ensuring regulatory and thermal compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can the EEU-FS2A680 be used as a direct replacement for the SXR680M100ST?

A: Yes. The EEU-FS2A680 matches all critical electrical parameters: 68 µF capacitance, ±20% tolerance, 100 V rating, and identical lead spacing (5.00 mm). Physical dimensions are identical, enabling direct PCB substitution. The extended lifetime (8000 hours at 105°C) provides additional operational margin.

Q: What is the primary difference between the EKZE101ELL680MJ16S and the EEU-FS2A680?

A: Both parts are 100 V rated with 68 µF capacitance and identical lead spacing. The EKZE101ELL680MJ16S maintains the original 4000-hour lifetime specification, while the EEU-FS2A680 provides 8000 hours. Ripple current ratings differ: the EEU-FS2A680 supports higher ripple current at both 120 Hz (651 mA versus 240 mA) and 100 kHz (930 mA versus 600 mA).

Q: Can the UCS2D680MHD1TO replace the SXR680M100ST in all applications?

A: The UCS2D680MHD1TO is electrically compatible as a 68 µF, ±20% tolerance capacitor with identical lead spacing. However, the physical diameter increases from 10.00 mm to 12.50 mm. PCB layout verification is required to confirm adequate clearance around the component location before substitution.

Q: Why is the UCS2D680MHD1TO rated at 200 V instead of 100 V?

A: The 200 V rating provides a voltage derating margin. In a 100 V application, the component operates at 50% of its rated voltage, extending operational lifetime and improving reliability. This is a standard engineering practice for enhanced design margin.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All three substitute parts (EEU-FS2A680, EKZE101ELL680MJ16S, and UCS2D680MHD1TO) are ROHS3 compliant, matching the regulatory status of the original SXR680M100ST.

Q: What is the impact of different ripple current ratings on part selection?

A: Ripple current rating determines the maximum AC current the capacitor can handle without exceeding temperature limits. Higher ripple current ratings (such as the EEU-FS2A680 at 651 mA @ 120 Hz) are suitable for applications with significant AC ripple. Lower ratings (such as the EKZE101ELL680MJ16S at 240 mA @ 120 Hz) are appropriate for lower-ripple applications. Selection depends on actual circuit ripple current requirements.

Q: Is the Nichicon UCS2D680MHD1TO available in the same packaging as the original part?

A: The UCS2D680MHD1TO uses Cut Tape (CT) packaging, while the original SXR680M100ST uses standard bulk packaging. Both are through-hole radial, can components with identical lead spacing. Packaging format does not affect electrical or mechanical compatibility.