SXR681M010ST Equivalent & Substitute Parts

Part Overview

The SXR681M010ST is a 680 µF, 10 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, through-hole configuration. This component is classified as obsolete, indicating that it is no longer in active production. The identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance and repairs.

Key Parameters

Parameter	Value
Capacitance	680 µF
Voltage Rating	10 V
Tolerance	±20%
Mounting Type	Through Hole
Package Type	Radial, Can
Lead Spacing	0.197" (5.00 mm)
Polarization	Polar
Operating Temperature Range	-40°C to 105°C
Lifetime @ Temperature	4000 Hrs @ 105°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SXR681M010ST are categorized into two groups based on electrical and mechanical compatibility:

Direct Equivalents (10 V Rating)

Direct equivalent parts maintain the same capacitance (680 µF), voltage rating (10 V), tolerance (±20%), lead spacing (5.00 mm), and through-hole radial package configuration. These parts are interchangeable in applications where the original 10 V specification is required. Direct equivalents include:

EEU-FM1A681 (Panasonic, Active)
EEU-FM1A681B (Panasonic, Active)
EKZE100ELL681MJC5S (Chemi-Con, Active)
UHE1A681MPD6 (Nichicon, Not For New Designs)
UPJ1A681MPD6 (Nichicon, Not For New Designs)

Upgrade Options (16 V Rating)

Upgrade parts increase the voltage rating to 16 V while maintaining the same capacitance (680 µF), tolerance (±20%), lead spacing (5.00 mm), and through-hole radial package. These parts are suitable for applications where higher voltage margin is beneficial or required. Upgrade options include:

EKY-160ELL681MJ16S (Chemi-Con, Active)
EKZE160ELL681MJ16S (Chemi-Con, Active)
UHE1C681MPD6 (Nichicon, Not For New Designs)
UPW1C681MPD (Nichicon, Not For New Designs)

All substitute parts comply with ROHS3 standards and operate within the -40°C to 105°C temperature range.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Lead Spacing	Height (Max)	Product Status
SXR681M010ST	Cornell Dubilier	680 µF	10 V	±20%	4000 Hrs	5.00 mm	16.00 mm	Obsolete
EEU-FM1A681	Panasonic	680 µF	10 V	±20%	4000 Hrs	5.00 mm	14.00 mm	Active
EEU-FM1A681B	Panasonic	680 µF	10 V	±20%	4000 Hrs	5.00 mm	14.00 mm	Active
EKZE100ELL681MJC5S	Chemi-Con	680 µF	10 V	±20%	4000 Hrs	5.00 mm	14.00 mm	Active
UHE1A681MPD6	Nichicon	680 µF	10 V	±20%	6000 Hrs	5.00 mm	12.50 mm	Not For New Designs
UPJ1A681MPD6	Nichicon	680 µF	10 V	±20%	5000 Hrs	5.00 mm	16.50 mm	Not For New Designs
EKY-160ELL681MJ16S	Chemi-Con	680 µF	16 V	±20%	7000 Hrs	5.00 mm	17.50 mm	Active
EKZE160ELL681MJ16S	Chemi-Con	680 µF	16 V	±20%	4000 Hrs	5.00 mm	17.50 mm	Active
UHE1C681MPD6	Nichicon	680 µF	16 V	±20%	7000 Hrs	5.00 mm	16.00 mm	Not For New Designs
UPW1C681MPD	Nichicon	680 µF	16 V	±20%	5000 Hrs	5.00 mm	16.00 mm	Not For New Designs

Engineering Selection Recommendations

For Direct Replacement (10 V Applications)

Select from active product status parts for new procurement and ongoing supply:

EEU-FM1A681B (Panasonic, Active, Cut Tape packaging) is the primary recommendation for direct replacement. This part maintains electrical equivalence with the SXR681M010ST while offering active product status, ROHS3 compliance, and established supply availability.
EKZE100ELL681MJC5S (Chemi-Con, Active) provides an alternative direct equivalent with active status and ROHS3 compliance.

Parts with "Not For New Designs" status (UHE1A681MPD6, UPJ1A681MPD6) are suitable for legacy system maintenance and repair applications where supply of the original part is unavailable, but should not be selected for new designs.

For Voltage Upgrade Applications (16 V Requirements)

Select from active product status parts when higher voltage margin is required:

EKY-160ELL681MJ16S (Chemi-Con, Active) offers the highest lifetime rating (7000 Hrs @ 105°C) among 16 V options with active product status and ROHS3 compliance.
EKZE160ELL681MJ16S (Chemi-Con, Active) provides an alternative 16 V upgrade with active status and ROHS3 compliance.

Parts with "Not For New Designs" status (UHE1C681MPD6, UPW1C681MPD) are available for legacy applications but should not be selected for new designs.

All recommended parts comply with ROHS3 standards and operate within the specified temperature range of -40°C to 105°C.

Frequently Asked Questions (FAQ)

Q: Can I use a 16 V rated capacitor in place of a 10 V rated capacitor?

A: Yes. A 16 V rated capacitor is electrically compatible in a 10 V application. The higher voltage rating provides additional safety margin and does not affect circuit operation. Physical dimensions must be verified to ensure fit within the available board space.

Q: What is the significance of "Not For New Designs" product status?

A: Parts marked "Not For New Designs" are still manufactured and available for purchase, but manufacturers do not recommend their use in new product development. These parts are suitable for maintaining and repairing existing equipment. For new designs, select parts with "Active" product status.

Q: Are all substitute parts mechanically compatible with the original SXR681M010ST?

A: All listed substitute parts share the same lead spacing (5.00 mm) and through-hole radial package configuration. However, height dimensions vary. The SXR681M010ST has a maximum seated height of 16.00 mm. Direct equivalents (10 V) range from 12.50 mm to 16.50 mm in height. Upgrade options (16 V) range from 16.00 mm to 17.50 mm in height. Verify available board space before selection.

Q: What is the difference between EEU-FM1A681 and EEU-FM1A681B?

A: Both parts are electrically and mechanically identical. The primary difference is packaging: EEU-FM1A681 is supplied in Bulk packaging, while EEU-FM1A681B is supplied in Cut Tape (CT) packaging. Select based on your procurement and assembly requirements.

Q: Why do some substitute parts have longer lifetime ratings?

A: Lifetime ratings (measured in hours at 105°C) vary by manufacturer and series design. UHE1A681MPD6 offers 6000 Hrs @ 105°C compared to the original 4000 Hrs @ 105°C. Extended lifetime indicates improved thermal stability and may provide longer service life in high-temperature applications, though this does not affect compatibility in standard applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed comply with ROHS3 standards. The original SXR681M010ST also carries ROHS3 compliance.

Q: What does ESR (Equivalent Series Resistance) indicate?

A: ESR is the internal resistance of the capacitor at a specified frequency. Lower ESR values indicate better high-frequency performance and lower heat generation. The original SXR681M010ST specifies 370 mOhm @ 120 Hz. Substitute parts with lower ESR values (such as Panasonic EEU-FM series at 38 mOhms) provide improved ripple current handling and thermal characteristics.

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