UPB2W680MHD Equivalent & Substitute Parts

Part Overview

The UPB2W680MHD is a 68 µF, 450 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as obsolete, with a rated lifetime of 5000 hours at 105°C. Due to its obsolete status, direct replacement with active production alternatives is necessary for new designs and ongoing procurement. Substitute parts must maintain electrical equivalence across capacitance, voltage rating, and mechanical compatibility while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value
Capacitance	68 µF
Voltage Rating	450 V
Tolerance	±20%
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.295" (7.50 mm)
Polarization	Polar
Operating Temperature Range	-25°C ~ 105°C
Lifetime @ 105°C	5000 Hrs

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria (Must Match):

Capacitance: 68 µF
Voltage Rating: 450 V or higher
Tolerance: ±20%
Polarization: Polar
Package: Radial, Can
Mounting: Through Hole
Lead Spacing: 0.295" (7.50 mm)

Secondary Compatibility Factors:

Operating temperature range must encompass -25°C to 105°C minimum
Physical dimensions (diameter and height) must accommodate PCB layout constraints
Ripple current ratings must meet or exceed application requirements

Parts are grouped into three categories:

Direct Substitutes: Identical electrical specifications and mechanical dimensions. Interchangeable without circuit modification.

Upgrade Substitutes: Higher voltage rating (500 V) or extended lifetime (10000+ hours @ 105°C). Backward compatible with 450 V applications. Improved reliability characteristics.

Similar Substitutes: Matching core electrical parameters but with dimensional variations (different can diameter or height). Require PCB layout verification before implementation.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Diameter	Height (Max)	Lead Spacing	Status
UPB2W680MHD	Nichicon	68 µF	450 V	5000 Hrs	0.709" (18.00 mm)	1.634" (41.50 mm)	0.295" (7.50 mm)	Obsolete
UCS2W680MHD	Nichicon	68 µF	450 V	10000 Hrs	0.709" (18.00 mm)	1.299" (33.00 mm)	0.295" (7.50 mm)	Active
UPT2W680MHD6	Nichicon	68 µF	450 V	5000 Hrs	0.709" (18.00 mm)	1.299" (33.00 mm)	0.295" (7.50 mm)	Active
UCY2H680MHD	Nichicon	68 µF	500 V	12000 Hrs	0.709" (18.00 mm)	1.634" (41.50 mm)	0.295" (7.50 mm)	Active
UCS2W680MNY9	Nichicon	68 µF	450 V	10000 Hrs	0.492" (12.50 mm)	2.047" (52.00 mm)	0.197" (5.00 mm)	Active
UPT2W680MHD	Nichicon	68 µF	450 V	5000 Hrs	0.630" (16.00 mm)	1.634" (41.50 mm)	0.295" (7.50 mm)	Active
UVY2W680MHD	Nichicon	68 µF	450 V	2000 Hrs	0.709" (18.00 mm)	1.476" (37.50 mm)	0.295" (7.50 mm)	Not For New Designs
450LLE68MEFC18X31.5	Rubycon	68 µF	450 V	20000 Hrs	0.709" (18.00 mm)	1.319" (34.60 mm)	0.295" (7.50 mm)	Active
B43858C5686M	EPCOS - TDK Electronics	68 µF	450 V	5000 Hrs	0.709" (18.00 mm)	1.654" (42.00 mm)	0.295" (7.50 mm)	Active
EEU-ED2W680	Panasonic Electronic Components	68 µF	450 V	10000 Hrs	0.709" (18.00 mm)	1.575" (40.00 mm)	0.295" (7.50 mm)	Obsolete
EKXG451ELL680MMN3S	Chemi-Con	68 µF	450 V	10000 Hrs	0.709" (18.00 mm)	1.240" (31.50 mm)	0.295" (7.50 mm)	Active

Engineering Selection Recommendations

Recommended Primary Substitutes (Direct Replacement):

UCS2W680MHD and EKXG451ELL680MMN3S are the preferred direct substitutes. Both maintain 68 µF capacitance, 450 V rating, and 0.295" lead spacing. UCS2W680MHD offers extended 10000-hour lifetime with active product status and RoHS3 compliance. EKXG451ELL680MMN3S (Chemi-Con) provides equivalent electrical performance with the shortest height profile (1.240"), facilitating space-constrained layouts. Both are in active production with full compliance certifications.

Recommended Upgrade Substitute:

UCY2H680MHD provides superior reliability with 500 V rating and 12000-hour lifetime at 105°C. This part is suitable for applications requiring enhanced voltage margin or extended service life. Physical dimensions match the original UPB2W680MHD (0.709" diameter, 1.634" height), enabling direct PCB footprint compatibility. RoHS3 compliant and actively manufactured.

Alternative Substitutes:

UPT2W680MHD6 matches the original 5000-hour lifetime specification with active status and RoHS3 compliance. Slightly reduced height (1.299") compared to the original. Suitable for applications where lifetime equivalence is prioritized.

450LLE68MEFC18X31.5 (Rubycon) offers the longest operational lifetime (20000 hours @ 105°C) among all substitutes. Compact height (1.319") with identical lead spacing. Active production status with RoHS3 compliance.

Parts Not Recommended for New Designs:

UVY2W680MHD carries "Not For New Designs" status and exhibits significantly reduced lifetime (2000 hours @ 105°C). Avoid for new applications.

EEU-ED2W680 is obsolete. While technically compatible, procurement may be limited.

UCS2W680MNY9 requires PCB layout modification due to different lead spacing (0.197" vs. 0.295") and can diameter (0.492" vs. 0.709").

Frequently Asked Questions (FAQ)

Q: Can UCS2W680MHD directly replace UPB2W680MHD without PCB modification?

A: Yes. Both parts share identical capacitance (68 µF), voltage rating (450 V), tolerance (±20%), lead spacing (0.295"), and can diameter (0.709"). The primary difference is reduced height (1.299" vs. 1.634"), which is mechanically compatible with the original footprint. No circuit changes are required.

Q: What is the advantage of UCY2H680MHD over direct substitutes?

A: UCY2H680MHD provides two enhancements: higher voltage rating (500 V vs. 450 V) and extended lifetime (12000 hours vs. 5000-10000 hours @ 105°C). The 500 V rating offers additional voltage margin for applications with transient overvoltage conditions. Extended lifetime improves long-term reliability. Physical dimensions match the original part exactly.

Q: Why does UCS2W680MNY9 require PCB layout verification?

A: UCS2W680MNY9 has different mechanical specifications: lead spacing of 0.197" (vs. 0.295") and can diameter of 0.492" (vs. 0.709"). These dimensional changes require PCB footprint redesign. Electrical parameters remain equivalent (68 µF, 450 V, ±20%).

Q: Is 450LLE68MEFC18X31.5 suitable for high-reliability applications?

A: Yes. The 450LLE68MEFC18X31.5 (Rubycon LLE series) is rated for 20000 hours at 105°C, the longest lifetime among all substitutes. This extended rating supports applications requiring high reliability and extended service intervals. Lead spacing and can diameter match the original specification.

Q: Can I use a 500 V rated capacitor in a 450 V circuit?

A: Yes. UCY2H680MHD is rated for 500 V and is fully compatible with 450 V applications. Higher voltage rating provides additional safety margin and does not affect circuit operation. Capacitance and tolerance remain identical to the original specification.

Q: What compliance certifications should I verify before selection?

A: All recommended active substitutes carry RoHS3 compliance. Verify REACH status for your specific application region. All listed parts are REACH Unaffected or REACH Compliant. Confirm ECCN classification (all listed parts are EAR99) if export restrictions apply to your end-use application.

Q: Are there dimensional constraints I should consider?

A: Yes. Height variation ranges from 1.240" (EKXG451ELL680MMN3S) to 2.047" (UCS2W680MNY9). Verify available PCB clearance above the capacitor location. Lead spacing must remain 0.295" for direct footprint compatibility, except for UCS2W680MNY9 which requires 0.197" spacing. Can diameter should match or be smaller than the original 0.709" to ensure mechanical fit within component mounting area.

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