UHE1E331MPT Equivalent & Substitute Parts

Part Overview

The UHE1E331MPT is a 330 µF, 25 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as obsolete and no longer recommended for new designs. The UHE series has been superseded by newer product lines with improved performance characteristics and compliance ratings. Identifying suitable equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and meet current regulatory requirements for new production runs.

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
Lead Spacing	0.138" (4.60 mm)
Diameter	0.315" (8.00 mm)
Height	0.591" (15.00 mm)

Substitute Part Grouping Explanation

Substitution eligibility for the UHE1E331MPT is determined by strict equivalence across the following critical parameters:

Core Electrical Parameters (Non-Negotiable):

Capacitance: 330 µF
Voltage Rating: 25 V
Tolerance: ±20%
Polarization: Polar

Mechanical Parameters (Package Compatibility):

Mounting Type: Through Hole
Package Type: Radial, Can
Lead Spacing: 0.138" (4.60 mm) or 0.197" (5.00 mm) with PCB layout verification
Diameter: 0.315" (8.00 mm) or 0.394" (10.00 mm) with space clearance verification
Height: Maximum 0.650" (16.50 mm) with board clearance verification

Performance Parameters (Application-Dependent):

Operating Temperature Range: -40°C ~ 105°C minimum
Lifetime @ 105°C: Equal to or greater than 7000 Hrs
Ripple Current Capability: Must meet or exceed application requirements

Substitutes are grouped into three categories: direct manufacturer equivalents (Nichicon UHE series), similar performance alternatives (Nichicon UHV/UHE variants), and upgraded alternatives (Panasonic EB and FM series with enhanced specifications).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Lead Spacing	Diameter	Height	Product Status	RoHS Status
UHE1E331MPT	Nichicon	330 µF	25 V	±20%	7000 Hrs	0.138" (4.60 mm)	0.315" (8.00 mm)	0.591" (15.00 mm)	Obsolete	Non-compliant
UHE1E331MPD	Nichicon	330 µF	25 V	±20%	7000 Hrs	0.138" (4.60 mm)	0.315" (8.00 mm)	0.591" (15.00 mm)	Not For New Designs	ROHS3 Compliant
UHE1E331MPD6	Nichicon	330 µF	25 V	±20%	7000 Hrs	0.197" (5.00 mm)	0.394" (10.00 mm)	0.492" (12.50 mm)	Not For New Designs	ROHS3 Compliant
EEU-EB1E331	Panasonic	330 µF	25 V	±20%	10000 Hrs	0.138" (4.60 mm)	0.315" (8.00 mm)	0.630" (16.00 mm)	Active	ROHS3 Compliant
EEU-FM1E331	Panasonic	330 µF	25 V	±20%	4000 Hrs	0.197" (5.00 mm)	0.394" (10.00 mm)	0.551" (14.00 mm)	Active	ROHS3 Compliant
EEU-FM1E331B	Panasonic	330 µF	25 V	±20%	4000 Hrs	0.197" (5.00 mm)	0.394" (10.00 mm)	0.551" (14.00 mm)	Active	ROHS3 Compliant
EEU-FM1E331L	Panasonic	330 µF	25 V	±20%	3000 Hrs	0.138" (4.60 mm)	0.315" (8.00 mm)	0.650" (16.50 mm)	Active	ROHS3 Compliant
EEU-FM1E331LB	Panasonic	330 µF	25 V	±20%	3000 Hrs	0.197" (5.00 mm)	0.315" (8.00 mm)	0.650" (16.50 mm)	Active	ROHS3 Compliant
EEU-FM1E331LBJ	Panasonic	330 µF	25 V	±20%	3000 Hrs	0.197" (5.00 mm)	0.315" (8.00 mm)	0.650" (16.50 mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Mechanical Replacement (Same Footprint): UHE1E331MPD is the closest equivalent to UHE1E331MPT, maintaining identical electrical specifications and mechanical dimensions. However, UHE1E331MPD is classified as "Not For New Designs" and carries ROHS3 compliance, whereas the original part is non-compliant. For legacy system repairs or field replacements where PCB layout cannot be modified, UHE1E331MPD provides pin-for-pin compatibility.

Preferred Active Alternatives (New Designs): EEU-EB1E331 (Panasonic) is the recommended upgrade path for new designs. It maintains the same lead spacing (0.138", 4.60 mm) and diameter (0.315", 8.00 mm) as the original part, with a marginal height increase of 0.039" (1.00 mm). The EEU-EB1E331 offers 10000 Hrs lifetime at 105°C, exceeding the original 7000 Hrs specification, and carries active product status with full ROHS3 compliance.

Space-Constrained Alternatives: For applications where the additional 0.039" height of EEU-EB1E331 cannot be accommodated, EEU-FM1E331 series parts provide active status and ROHS3 compliance. EEU-FM1E331 and EEU-FM1E331B maintain a lower profile (0.551", 14.00 mm) but require PCB layout modification due to increased lead spacing (0.197", 5.00 mm) and diameter (0.394", 10.00 mm). These parts operate at 4000 Hrs lifetime at 105°C.

Extended Availability Options: EEU-FM1E331L and EEU-FM1E331LB restore the original lead spacing (0.138", 4.60 mm) and diameter (0.315", 8.00 mm) while maintaining active product status. These parts operate at 3000 Hrs lifetime at 105°C and are suitable for applications where thermal cycling stress is moderate. EEU-FM1E331LB is available in Cut Tape packaging for automated assembly.

Nichicon UHE Series Alternatives: UHE1E331MPD6 provides ROHS3 compliance and active inventory but requires PCB layout modification due to increased lead spacing (0.197", 5.00 mm) and diameter (0.394", 10.00 mm). This part maintains 7000 Hrs lifetime at 105°C and is classified as "Not For New Designs."

Frequently Asked Questions (FAQ)

Q: Can UHE1E331MPD be used as a direct replacement for UHE1E331MPT? A: Yes, UHE1E331MPD is mechanically and electrically identical to UHE1E331MPT. Both share the same lead spacing (0.138", 4.60 mm), diameter (0.315", 8.00 mm), height (0.591", 15.00 mm), and electrical specifications (330 µF, 25 V, ±20%, 7000 Hrs @ 105°C). The primary difference is that UHE1E331MPD carries ROHS3 compliance, whereas UHE1E331MPT does not. Both are classified as obsolete or not recommended for new designs.

Q: What is the difference between EEU-FM1E331 and EEU-FM1E331B? A: EEU-FM1E331 and EEU-FM1E331B are electrically and mechanically identical. The difference is packaging: EEU-FM1E331 is supplied in Bulk packaging, while EEU-FM1E331B is supplied in Cut Tape (CT) packaging for automated pick-and-place assembly. Both operate at 4000 Hrs lifetime at 105°C and require the same PCB layout modifications (0.197" lead spacing, 0.394" diameter).

Q: Why does EEU-EB1E331 have a higher lifetime rating than the original UHE1E331MPT? A: EEU-EB1E331 is rated for 10000 Hrs at 105°C compared to the original 7000 Hrs specification. This reflects improved internal construction and materials in the Panasonic EB-A series. The higher lifetime rating provides additional design margin and extended service life in thermal stress applications.

Q: Can EEU-FM1E331L be used if the original PCB has 0.138" lead spacing? A: Yes, EEU-FM1E331L maintains the original 0.138" (4.60 mm) lead spacing and 0.315" (8.00 mm) diameter, allowing direct PCB mounting without layout modification. However, the height increases to 0.650" (16.50 mm) compared to the original 0.591" (15.00 mm). Verify board clearance before substitution. The trade-off is reduced lifetime (3000 Hrs @ 105°C) compared to the original 7000 Hrs specification.

Q: What are the mechanical constraints when substituting UHE1E331MPD6? A: UHE1E331MPD6 requires PCB layout modification. Lead spacing increases from 0.138" to 0.197" (5.00 mm), and diameter increases from 0.315" to 0.394" (10.00 mm). Height decreases to 0.492" (12.50 mm), providing better board clearance. Verify PCB hole pattern compatibility and trace routing before substitution.

Q: Which substitute part offers the best balance of compatibility and performance? A: EEU-EB1E331 provides the optimal balance for new designs. It maintains the original lead spacing (0.138", 4.60 mm) and diameter (0.315", 8.00 mm), requiring no PCB layout modification. It offers superior lifetime (10000 Hrs @ 105°C), active product status, and full ROHS3 compliance. Height increases by only 0.039" (1.00 mm), which is acceptable in most applications.

Q: Are all substitute parts RoHS compliant? A: All Panasonic EEU series parts (EEU-EB1E331, EEU-FM1E331, EEU-FM1E331B, EEU-FM1E331L, EEU-FM1E331LB, EEU-FM1E331LBJ) carry ROHS3 compliance. Nichicon UHE1E331MPD and UHE1E331MPD6 also carry ROHS3 compliance. The original UHE1E331MPT is RoHS non-compliant. For applications requiring RoHS compliance, any of the listed substitutes are acceptable.

Q: What is the difference between Cut Tape and Bulk packaging? A: Cut Tape (CT) packaging supplies components on individual tape segments suitable for automated pick-and-place assembly equipment. Bulk packaging supplies loose components in containers. EEU-FM1E331B and EEU-FM1E331LB are available in Cut Tape format for high-volume automated assembly. EEU-FM1E331 and EEU-FM1E331L are available in Bulk format for manual assembly or lower-volume applications.

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