UAS2D271MHD Equivalent & Substitute Parts

Part Overview

The UAS2D271MHD is a 270 µF, 200 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as Active and serves general-purpose applications requiring polarized capacitive storage. The UAS series provides 2000 hours of operational life at 105°C with a ±20% capacitance tolerance. Substitute parts are necessary when inventory constraints exist, when extended operational lifetime is required, or when higher voltage ratings are needed for circuit margin improvements.

Key Parameters

Parameter	Value
Capacitance	270 µF
Voltage Rating	200 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-40°C to 105°C
Polarization	Polar
Lead Spacing	0.295" (7.50 mm)
Case Diameter	0.709" (18.00 mm)
Height	1.476" (37.50 mm)
Mounting Type	Through Hole
Package	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UAS2D271MHD is determined by the following criteria:

Primary Compatibility Requirements:

Capacitance value: 270 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage rating: Equal to or greater than 200 V
Polarization: Polar (exact match required)
Lead spacing: 0.295" (7.50 mm) (exact match required)
Mounting type: Through Hole (exact match required)
Package: Radial, Can (exact match required)

Secondary Compatibility Factors:

Physical dimensions must accommodate PCB layout constraints
Lifetime rating may exceed the original specification
Ripple current capability must meet or exceed circuit requirements

The substitute parts UCY2E271MHD, UCY2D271MHD, and UCY2D271MHD6 satisfy all primary compatibility requirements. Variations in case diameter, height, and operational lifetime represent improvements or alternative configurations within the same electrical class.

Parameter Comparison

Parameter	UAS2D271MHD	UCY2E271MHD	UCY2D271MHD	UCY2D271MHD6
Capacitance	270 µF	270 µF	270 µF	270 µF
Voltage Rating	200 V	250 V	200 V	200 V
Tolerance	±20%	±20%	±20%	±20%
Lifetime @ 105°C	2000 Hrs	12000 Hrs	12000 Hrs	12000 Hrs
Operating Temperature	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C
Lead Spacing	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)
Case Diameter	0.709" (18.00 mm)	0.709" (18.00 mm)	0.630" (16.00 mm)	0.709" (18.00 mm)
Height	1.476" (37.50 mm)	1.457" (37.00 mm)	1.457" (37.00 mm)	1.299" (33.00 mm)
Ripple Current @ 120 Hz	890 mA	1.45 A	1.4 A	1.41 A
Ripple Current @ High Frequency	1.424 A @ 10 kHz	2.9 A @ 100 kHz	2.8 A @ 100 kHz	2.82 A @ 100 kHz
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package	Radial, Can	Radial, Can	Radial, Can	Radial, Can
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

UCY2E271MHD (Upgrade Option): This part provides a 250 V voltage rating with 12000 hours lifetime at 105°C, representing a 6x improvement in operational duration compared to the UAS2D271MHD. Physical dimensions remain compatible with identical lead spacing and case diameter. REACH status is Affected. Selection is appropriate when extended service life and increased voltage margin are design objectives.

UCY2D271MHD (Direct Equivalent): This part maintains the 200 V voltage rating while extending lifetime to 12000 hours. Case diameter is reduced to 0.630" (16.00 mm), requiring verification of PCB layout clearance. Lead spacing and height remain compatible. REACH status is Affected. Selection is appropriate when space constraints permit the smaller diameter and extended lifetime is beneficial.

UCY2D271MHD6 (Compact Configuration): This part maintains the 200 V voltage rating and 0.709" case diameter while reducing height to 1.299" (33.00 mm). Lifetime extends to 12000 hours. REACH status is Affected. Selection is appropriate when vertical clearance is limited while maintaining standard case diameter.

All substitute parts maintain ROHS3 compliance and identical lead spacing for direct PCB mounting compatibility.

Frequently Asked Questions (FAQ)

Q: Can UCY2E271MHD replace UAS2D271MHD in any application? A: UCY2E271MHD is electrically compatible as a direct substitute. The 250 V rating exceeds the 200 V requirement, and 12000-hour lifetime exceeds 2000-hour specification. Physical dimensions are identical. Verification of REACH compliance requirements for your application is necessary.

Q: What is the primary difference between UCY2D271MHD and UCY2D271MHD6? A: Both parts share identical electrical specifications (270 µF, 200 V, 12000 Hrs @ 105°C). UCY2D271MHD6 has a reduced height of 1.299" (33.00 mm) compared to 1.457" (37.00 mm) for UCY2D271MHD. Case diameter differs: UCY2D271MHD is 0.630" (16.00 mm), while UCY2D271MHD6 is 0.709" (18.00 mm).

Q: Are all substitute parts through-hole mounted with identical lead spacing? A: Yes. All parts listed maintain 0.295" (7.50 mm) lead spacing and through-hole mounting configuration, ensuring PCB footprint compatibility.

Q: Does voltage rating affect substitution eligibility? A: Voltage rating must equal or exceed the original specification. UCY2E271MHD at 250 V exceeds the 200 V requirement and is acceptable. Parts rated below 200 V are not acceptable substitutes.

Q: What is the impact of lifetime rating differences? A: Lifetime rating indicates operational duration at maximum rated temperature (105°C). Extended lifetime (12000 Hrs vs. 2000 Hrs) represents improved reliability but does not affect electrical compatibility. Selection depends on application reliability requirements.

Q: Are physical dimension differences critical for substitution? A: Lead spacing and mounting type must match exactly. Case diameter and height variations require PCB layout verification to ensure clearance and fit within the allocated component space.

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