UHE2A271MHT Equivalent & Substitute Parts

Part Overview

The UHE2A271MHT is a 270 µF, 100 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as obsolete, making direct replacement necessary for new procurement and ongoing system support. The part operates across a temperature range of -40°C to 105°C with a rated lifetime of 10,000 hours at 105°C, serving general-purpose applications requiring stable capacitance and ripple current handling.

Key Parameters

Parameter	Value
Capacitance	270 µF
Tolerance	±20%
Voltage - Rated	100 V
Lifetime @ Temperature	10,000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Polarization	Polar
Mounting Type	Through Hole
Package / Case	Radial, Can
Lead Spacing	0.197" (5.00mm)
Size / Dimension	0.492" Dia (12.50mm)
Height - Seated (Max)	1.398" (35.50mm)

Substitute Part Grouping Explanation

Substitution for the UHE2A271MHT is determined by strict equivalence across the following critical parameters:

Capacitance: 270 µF (exact match required)
Voltage Rating: 100 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)
Operating Temperature Range: -40°C ~ 105°C (exact match required)
Lifetime @ 105°C: 10,000 Hrs (minimum acceptable)

Substitute parts are grouped into two categories:

Category 1 - Direct Electrical & Mechanical Equivalents (Same Lead Spacing & Footprint) Parts with identical lead spacing (0.197" / 5.00mm) and compatible physical dimensions allow direct board-level substitution without layout modification.

Category 2 - Functional Equivalents (Different Lead Spacing) Parts with different lead spacing (0.295" / 7.50mm) maintain electrical equivalence but require PCB layout verification before substitution.

Parameter Comparison

Parameter	UHE2A271MHT (Main)	UHE2A271MHD6	100ZLH270MEFC12.5X30	EKYB101ELL271MK30S
Manufacturer	Nichicon	Nichicon	Rubycon	Chemi-Con
Capacitance	270 µF	270 µF	270 µF	270 µF
Tolerance	±20%	±20%	±20%	±20%
Voltage - Rated	100 V	100 V	100 V	100 V
Lifetime @ 105°C	10,000 Hrs	10,000 Hrs	10,000 Hrs	10,000 Hrs
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Polarization	Polar	Polar	Polar	Polar
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Lead Spacing	0.197" (5.00mm)	0.295" (7.50mm)	0.197" (5.00mm)	0.197" (5.00mm)
Size / Dimension	0.492" Dia (12.50mm)	0.630" Dia (16.00mm)	0.492" Dia (12.50mm)	0.492" Dia (12.50mm)
Height - Seated (Max)	1.398" (35.50mm)	0.984" (25.00mm)	1.260" (32.00mm)	1.240" (31.50mm)
Impedance	83 mOhms	73 mOhms	51 mOhms	33 mOhms
Ripple Current @ 120 Hz	798 mA	945 mA	975 mA	975 mA
Ripple Current @ 100 kHz	1.14 A	1.35 A	1.95 A	1.95 A
Product Status	Obsolete	Not For New Designs	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Board-Level Substitution (No Layout Changes Required):

Use 100ZLH270MEFC12.5X30 (Rubycon) or EKYB101ELL271MK30S (Chemi-Con). Both parts maintain identical lead spacing (0.197" / 5.00mm) and compatible physical dimensions to the UHE2A271MHT. Both are classified as Active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment. The EKYB101ELL271MK30S offers superior electrical performance with lower impedance (33 mOhms) and higher ripple current capability at 100 kHz (1.95 A).

For Applications Tolerating Layout Modification:

The UHE2A271MHD6 (Nichicon) provides functional equivalence with identical electrical specifications but requires PCB layout verification due to different lead spacing (0.295" / 7.50mm) and larger physical dimensions. This part is classified as Not For New Designs, limiting its suitability for new development.

Compliance Consideration:

The original UHE2A271MHT is RoHS non-compliant. All recommended substitutes (100ZLH270MEFC12.5X30, EKYB101ELL271MK30S, and UHE2A271MHD6) are ROHS3 compliant, supporting regulatory requirements for new applications.

Frequently Asked Questions (FAQ)

Q: Can I use UHE2A271MHD6 as a direct replacement without modifying the PCB?

A: No. The UHE2A271MHD6 has a lead spacing of 0.295" (7.50mm) compared to the original 0.197" (5.00mm). PCB layout verification is required before substitution. The part is also larger in diameter (0.630" vs 0.492") and shorter in height (0.984" vs 1.398"), which may affect clearance and mounting considerations.

Q: What is the difference between 100ZLH270MEFC12.5X30 and EKYB101ELL271MK30S?

A: Both parts are direct footprint equivalents with identical lead spacing and compatible dimensions. The primary difference is impedance: EKYB101ELL271MK30S has lower impedance (33 mOhms vs 51 mOhms), resulting in better ripple current performance at high frequencies (1.95 A @ 100 kHz vs 1.95 A @ 100 kHz). Both are Active products with ROHS3 compliance.

Q: Why is the original UHE2A271MHT marked as obsolete?

A: Nichicon has discontinued this part number. Substitute parts from active product lines (100ZLH270MEFC12.5X30 and EKYB101ELL271MK30S) provide equivalent functionality with improved compliance status and ongoing manufacturer support.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitutes (100ZLH270MEFC12.5X30, EKYB101ELL271MK30S, and UHE2A271MHD6) are ROHS3 compliant, whereas the original UHE2A271MHT is RoHS non-compliant. This compliance upgrade is beneficial for regulatory alignment in new applications.

Q: Can I use UHE2A270MPD as a substitute?

A: No. The UHE2A270MPD has a capacitance of 27 µF, not 270 µF. This represents a 10-fold reduction in capacitance and does not meet the electrical equivalence requirement for substitution.

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