Equivalent & Substitute Parts for UHE1E331MPD6

Part Overview

The UHE1E331MPD6 is a 330 µF, 25 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for 7000 hours at 105°C and is classified as Not For New Designs. Finding equivalent and substitute parts is necessary due to product status constraints and to ensure design flexibility across manufacturing cycles and supply chain availability.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	25 V
Tolerance	±20%
Lifetime @ 105°C	7000 Hrs
Operating Temperature Range	-40°C ~ 105°C
Polarization	Polar
Mounting Type	Through Hole
Package Type	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UHE1E331MPD6 is determined by the following criteria:

Electrical Parameters: Capacitance (330 µF), voltage rating (25 V), and tolerance (±20%) must match exactly
Thermal Performance: Lifetime rating at 105°C must be equal to or greater than 7000 hours
Mechanical Compatibility: Lead spacing, physical dimensions, and mounting type must accommodate the original PCB layout
Regulatory Compliance: RoHS3 compliance and REACH status must be maintained
Polarization: Polar configuration is mandatory

Substitute parts are grouped into three categories:

Direct Equivalents (Same Series): Nichicon UHE and UHV series parts with matching electrical specifications and thermal ratings
Cross-Manufacturer Alternatives: Panasonic EEU-FM series and Chemi-Con EKY series with equivalent performance characteristics
Legacy/Transitional Parts: Nichicon UHD and UTT series with reduced thermal ratings or obsolete status

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Lead Spacing	Size (Dia)	Height (Max)	Impedance	Product Status
UHE1E331MPD6	Nichicon	330 µF	25 V	7000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.492" (12.50mm)	80 mOhms	Not For New Designs
UHE1E331MPD	Nichicon	330 µF	25 V	7000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.591" (15.00mm)	87 mOhms	Not For New Designs
UHV1E331MPD	Nichicon	330 µF	25 V	6000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.512" (13.00mm)	59 mOhms	Not For New Designs
UHD1E331MPD	Nichicon	330 µF	25 V	3000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.650" (16.50mm)	56 mOhms	Not For New Designs
UTT1E331MPD	Nichicon	330 µF	25 V	5000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.453" (11.50mm)	400 mOhms	Obsolete
EKY-250ELL331MJC5S	Chemi-Con	330 µF	25 V	7000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	80 mOhms	Active
EEU-FM1E331	Panasonic	330 µF	25 V	4000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	38 mOhms	Active
EEU-FM1E331B	Panasonic	330 µF	25 V	4000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	38 mOhms	Active
EEU-FM1E331L	Panasonic	330 µF	25 V	3000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.650" (16.50mm)	41 mOhms	Active
EEU-FM1E331LB	Panasonic	330 µF	25 V	3000 Hrs	0.197" (5.00mm)	0.315" (8.00mm)	0.650" (16.50mm)	41 mOhms	Active
EEU-FM1E331LBJ	Panasonic	330 µF	25 V	3000 Hrs	0.197" (5.00mm)	0.315" (8.00mm)	0.650" (16.50mm)	41 mOhms	Active

Engineering Selection Recommendations

Primary Substitute (Recommended for New Designs)

EKY-250ELL331MJC5S (Chemi-Con) is the preferred substitute. This part maintains identical electrical specifications (330 µF, 25 V, ±20% tolerance) and thermal performance (7000 hours at 105°C). It shares the same lead spacing (0.197", 5.00mm) and physical footprint as the original UHE1E331MPD6, ensuring direct PCB compatibility. The part carries Active product status and ROHS3 compliance, making it suitable for new design implementations.

Secondary Substitutes (Equivalent Electrical Performance)

UHE1E331MPD (Nichicon) provides identical thermal performance (7000 hours at 105°C) but requires PCB layout verification due to different lead spacing (0.138", 4.60mm) and reduced physical dimensions. This part is suitable only if PCB layout accommodates the smaller footprint.

Conditional Substitutes (Reduced Thermal Rating)

UHV1E331MPD (Nichicon) and EEU-FM series parts (Panasonic) offer reduced thermal ratings (6000 hours and 3000-4000 hours respectively at 105°C). These parts are acceptable only in applications where the lower thermal endurance does not compromise system reliability. Lead spacing and physical dimensions vary; PCB compatibility must be confirmed before selection.

Not Recommended

UTT1E331MPD (Nichicon) is classified as Obsolete and exhibits significantly higher impedance (400 mOhms) compared to the original specification (80 mOhms). This part should not be selected for new applications.

Frequently Asked Questions (FAQ)

Q: Can UHE1E331MPD be used as a direct replacement for UHE1E331MPD6?

A: UHE1E331MPD matches the electrical and thermal specifications but has different lead spacing (0.138" vs. 0.197") and physical dimensions. Direct PCB substitution is not possible without layout modification. Electrical performance is equivalent.

Q: What is the key difference between EKY-250ELL331MJC5S and the original part?

A: Both parts share identical electrical ratings (330 µF, 25 V) and thermal performance (7000 hours at 105°C). The primary difference is manufacturer (Chemi-Con vs. Nichicon) and product status (Active vs. Not For New Designs). Physical dimensions and lead spacing are compatible.

Q: Why do Panasonic EEU-FM series parts have lower thermal ratings?

A: The EEU-FM series is rated for 3000-4000 hours at 105°C, compared to 7000 hours for the original UHE1E331MPD6. This reflects different design specifications within the Panasonic product line. Selection depends on application thermal requirements.

Q: Are there packaging differences between similar part numbers?

A: Yes. EEU-FM1E331B is supplied in Cut Tape (CT) packaging, while EEU-FM1E331 is supplied in Bulk. Both have identical electrical and thermal specifications. Packaging selection depends on procurement and assembly requirements.

Q: What is the impact of impedance differences on circuit performance?

A: Impedance values range from 38 mOhms (Panasonic EEU-FM series) to 400 mOhms (Nichicon UTT1E331MPD). Lower impedance generally provides better high-frequency ripple current handling. The original UHE1E331MPD6 specifies 80 mOhms. Substitutes with significantly higher impedance (UTT series) may affect circuit stability in high-ripple applications.

Q: Can parts with different lead spacing be used interchangeably?

A: No. Lead spacing determines PCB hole positioning. The original UHE1E331MPD6 uses 0.197" (5.00mm) spacing. Parts with 0.138" (4.60mm) spacing require PCB redesign. Physical compatibility must be confirmed before substitution.

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