UCS2W6R8MPD Equivalent & Substitute Parts

Part Overview

The UCS2W6R8MPD is a 6.8 µF, 450 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for 8000 hours at 105°C and is designed for general-purpose applications requiring reliable energy storage and filtering in high-voltage circuits. The part is currently active in production. Equivalent and substitute parts are necessary when the original part becomes unavailable, when design requirements demand extended operational lifetime, or when alternative manufacturers' components meet or exceed the electrical and mechanical specifications of the original design.

Key Parameters

Parameter	Value
Capacitance	6.8 µF
Voltage Rating	450 V
Tolerance	±20%
Polarization	Polar
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)
Operating Temperature Range	-25°C to 105°C
Lifetime @ 105°C	8000 Hours
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UCS2W6R8MPD is determined by strict equivalence across the following critical parameters:

Capacitance Value: 6.8 µF (exact match required)
Voltage Rating: 450 V (minimum; higher ratings are acceptable)
Tolerance: ±20% (must match or be tighter)
Polarization: Polar (must match)
Package Type: Radial, Can (must match)
Mounting Type: Through Hole (must match)
Lead Spacing: 0.197" (5.00 mm) (must match for PCB compatibility)
Case Diameter: 0.394" (10.00 mm) (must match for mechanical fit)
Operating Temperature Range: -25°C to 105°C (must encompass or match)
RoHS Compliance: ROHS3 Compliant (must match)

All substitute parts listed meet these criteria. Differences in lifetime rating, ripple current specifications, and manufacturer series do not disqualify substitution when the above parameters are equivalent.

Parameter Comparison

Parameter	UCS2W6R8MPD (Nichicon)	UCA2W6R8MPD (Nichicon)	450LLE6R8MEFC10X20 (Rubycon)	B43890A5685M000 (EPCOS - TDK)
Capacitance	6.8 µF	6.8 µF	6.8 µF	6.8 µF
Voltage Rating	450 V	450 V	450 V	450 V
Tolerance	±20%	±20%	±20%	±20%
Polarization	Polar	Polar	Polar	Polar
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Lead Spacing	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Height (Max)	0.846" (21.50 mm)	0.846" (21.50 mm)	0.866" (22.00 mm)	0.866" (22.00 mm)
Operating Temperature	-25°C to 105°C	-25°C to 105°C	-25°C to 105°C	-25°C to 105°C
Lifetime @ 105°C	8000 Hours	10000 Hours	20000 Hours	12000 Hours
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Obsolete	Active	Active

Engineering Selection Recommendations

UCA2W6R8MPD (Nichicon): This part is electrically and mechanically equivalent to the UCS2W6R8MPD with identical physical dimensions and electrical ratings. However, the UCA2W6R8MPD is marked as obsolete, making it unsuitable for new designs or long-term procurement strategies. Use only if existing inventory is available and immediate replacement is required.

450LLE6R8MEFC10X20 (Rubycon): This part is fully compatible with the UCS2W6R8MPD across all critical substitution parameters. The maximum height is 0.020" (0.50 mm) greater than the original part. This part is active in production and offers extended lifetime (20000 hours at 105°C). ROHS3 compliance and REACH unaffected status are confirmed.

B43890A5685M000 (EPCOS - TDK Electronics): This part is fully compatible with the UCS2W6R8MPD across all critical substitution parameters. The maximum height is 0.020" (0.50 mm) greater than the original part. This part is active in production with 12000 hours lifetime at 105°C. ROHS3 compliance and REACH unaffected status are confirmed.

For new designs and applications requiring extended operational life, the 450LLE6R8MEFC10X20 or B43890A5685M000 are preferred due to active product status and higher lifetime ratings.

Frequently Asked Questions (FAQ)

Q: Can UCA2W6R8MPD be used as a direct replacement for UCS2W6R8MPD?

A: UCA2W6R8MPD meets all electrical and mechanical substitution criteria. However, it is marked as obsolete. Use only if existing stock is available and the application does not require long-term component availability.

Q: What is the impact of the 0.020" (0.50 mm) height difference in 450LLE6R8MEFC10X20 and B43890A5685M000?

A: The increased height must be verified against PCB layout constraints and enclosure clearances. If vertical space is limited, confirm that the additional 0.50 mm does not interfere with adjacent components or mechanical structures.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute part offers the longest operational lifetime?

A: The 450LLE6R8MEFC10X20 (Rubycon) offers 20000 hours at 105°C, compared to 8000 hours for the original UCS2W6R8MPD.

Q: Can these parts be used interchangeably on existing PCBs designed for UCS2W6R8MPD?

A: Yes, provided that the PCB layout accommodates the maximum height of 0.866" (22.00 mm) for the Rubycon and EPCOS parts. Lead spacing and case diameter are identical, ensuring footprint compatibility.

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