UHD1H271MPD Equivalent & Substitute Parts

Part Overview

The UHD1H271MPD is a 270 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as Not For New Designs, indicating it has been superseded in Nichicon's product line. The UHD series offers a 4000-hour lifetime rating at 105°C with general-purpose applications in through-hole mounting configurations. Identifying equivalent and substitute parts is necessary for legacy system maintenance, repair operations, and design continuity where existing inventory may be depleted or unavailable.

Key Parameters

Parameter	Value
Capacitance	270 µF
Voltage Rating	50 V
Tolerance	±20%
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.197" (5.00 mm)
Polarization	Polar
Operating Temperature Range	-40°C to 105°C
Lifetime @ 105°C	4000 Hours
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UHD1H271MPD is determined by the following mandatory parameters:

Capacitance: 270 µF (exact match required)
Voltage Rating: 50 V minimum (equal or higher voltage ratings are acceptable)
Tolerance: ±20% (standard tolerance for general-purpose applications)
Package Type: Radial, Can (physical form factor must match)
Lead Spacing: 0.197" (5.00 mm) (PCB layout compatibility)
Mounting Type: Through Hole (board assembly method)
Polarization: Polar (electrical polarity requirement)

Substitute parts are categorized into two groups:

Direct Equivalents (50 V Rating): Parts maintaining the original 50 V voltage specification with identical or improved electrical characteristics. These include UHW1H271MPD (Nichicon), UHE1H271MPD (Nichicon), 50ZLH270MEFC10X20 (Rubycon), EEU-FM1H271 (Panasonic), EEU-FR1H271 (Panasonic), and EKZE500ELL271MJ20S (Chemi-Con).

Upgrade Options (63 V Rating): Parts with elevated voltage ratings (63 V) that provide enhanced voltage margin while maintaining all other critical parameters. These include 63ZLH270MEFC10X20 (Rubycon), 63ZLJ270M10X20 (Rubycon), and EEU-FR1J271U (Panasonic).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Size (Dia × Height)	Impedance	Product Status
UHD1H271MPD	Nichicon	270 µF	50 V	4000 Hrs	0.394" × 0.866"	30 mOhms	Not For New Designs
UHW1H271MPD	Nichicon	270 µF	50 V	10000 Hrs	0.394" × 0.866"	30 mOhms	Not For New Designs
UHE1H271MPD	Nichicon	270 µF	50 V	7000 Hrs	0.394" × 0.787"	60 mOhms	Not For New Designs
UHE1H271MHD6	Nichicon	270 µF	50 V	10000 Hrs	0.492" × 0.591"	61 mOhms	Not For New Designs
50ZLH270MEFC10X20	Rubycon	270 µF	50 V	10000 Hrs	0.394" × 0.866"	30 mOhms	Active
EEU-FM1H271	Panasonic	270 µF	50 V	5000 Hrs	0.394" × 0.866"	23 mOhms	Active
EEU-FR1H271	Panasonic	270 µF	50 V	10000 Hrs	0.394" × 0.866"	23 mOhms	Active
EKZE500ELL271MJ20S	Chemi-Con	270 µF	50 V	4000 Hrs	0.394" × 0.846"	30 mOhms	Active
63ZLH270MEFC10X20	Rubycon	270 µF	63 V	10000 Hrs	0.394" × 0.866"	78 mOhms	Active
63ZLJ270M10X20	Rubycon	270 µF	63 V	10000 Hrs	0.394" × 0.866"	56 mOhms	Active
EEU-FR1J271U	Panasonic	270 µF	63 V	10000 Hrs	0.394" × 0.866"	35 mOhms	Active

Engineering Selection Recommendations

For Direct Replacement (50 V Applications):

Select from Active product status parts when available: EEU-FR1H271 (Panasonic), 50ZLH270MEFC10X20 (Rubycon), or EEU-FM1H271 (Panasonic). These maintain the original 50 V specification and are currently in production. EEU-FR1H271 offers the longest lifetime rating (10000 hours) with the lowest impedance (23 mOhms) among 50 V options.

For legacy system compatibility where original Nichicon UHD series parts are required, UHW1H271MPD provides a direct Nichicon equivalent with extended lifetime (10000 hours vs. 4000 hours) and identical physical dimensions and impedance characteristics.

For Voltage Margin Enhancement (63 V Upgrade):

When circuit design permits higher voltage ratings, 63ZLJ270M10X20 (Rubycon) or EEU-FR1J271U (Panasonic) provide improved voltage headroom while maintaining 10000-hour lifetime ratings. Both are Active products with standard lead spacing and radial can packaging. The 63 V rating provides additional safety margin in applications subject to voltage transients or supply variations.

All recommended substitutes are ROHS3 compliant and suitable for through-hole PCB assembly with 0.197" (5.00 mm) lead spacing.

Frequently Asked Questions (FAQ)

Q: Can UHE1H271MHD6 be used as a direct replacement for UHD1H271MPD?

A: UHE1H271MHD6 matches the capacitance, voltage, tolerance, and lead spacing requirements. However, it has a larger diameter (0.492" vs. 0.394") and shorter height (0.591" vs. 0.866"), which may not fit existing PCB footprints designed for the original UHD1H271MPD. Physical space verification is required before selection.

Q: What is the difference between 50 V and 63 V rated parts?

A: Both maintain 270 µF capacitance and identical lead spacing. The 63 V parts provide higher voltage rating, allowing operation in circuits with higher supply voltages or transient conditions. They are direct substitutes for 50 V applications and provide additional voltage margin.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original UHD1H271MPD specification.

Q: Which substitute offers the best electrical performance?

A: EEU-FR1H271 (Panasonic) and EEU-FM1H271 (Panasonic) provide the lowest impedance values (23 mOhms) among 50 V equivalents. EEU-FR1H271 additionally offers 10000-hour lifetime rating, combining low impedance with extended operational life.

Q: Can I use a 63 V rated part in a 50 V circuit?

A: Yes. Higher voltage-rated capacitors are electrically compatible with lower voltage circuits. The 63 V parts (63ZLH270MEFC10X20, 63ZLJ270M10X20, EEU-FR1J271U) function correctly in 50 V applications and provide additional voltage safety margin.

Q: What does "Not For New Designs" status mean?

A: This indicates the part has been discontinued or superseded by the manufacturer. It remains available in existing inventory but is not recommended for new product development. Active status parts are preferred for new applications.

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