Equivalent & Substitute Parts for UTT1E101MPD

Part Overview

The Nichicon UTT1E101MPD is a 100 µF, 25 V aluminum electrolytic capacitor in radial, can package rated for 5000 hours at 105°C. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The UTT series has been discontinued, requiring engineers to identify compatible alternatives that maintain electrical and mechanical compatibility within the constraints of the original design.

Key Parameters

Parameter	Value
Capacitance	100 µF
Voltage Rating	25 V
Tolerance	±20%
Lifetime @ 105°C	5000 Hrs
Operating Temperature Range	-40°C ~ 105°C
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.138" (4.60mm)
Case Diameter	0.315" (8.00mm)
Height	0.354" (9.00mm)
Ripple Current @ 120 Hz	138 mA
Ripple Current @ 100 kHz	230 mA
Impedance	680 mOhms
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the UTT1E101MPD is determined by strict adherence to the following electrical and mechanical parameters:

Electrical Compatibility Requirements:

Capacitance: 100 µF (exact match required)
Voltage Rating: 25 V minimum (higher ratings acceptable as derating)
Tolerance: ±20% (matching tolerance class)
Operating Temperature: -40°C to 105°C minimum range
Lifetime: 5000 Hrs @ 105°C preferred; lower ratings acceptable only if circuit design permits

Mechanical Compatibility Requirements:

Package Type: Radial, Can (through-hole only)
Lead Spacing: 0.138" (4.60mm) preferred; 0.098" (2.50mm) acceptable with PCB redesign
Case Diameter: 0.315" (8.00mm) preferred; 0.248" (6.30mm) acceptable with space constraints
Height: Must fit within original mounting envelope or allow mechanical clearance modification
Mounting Type: Through Hole (no surface mount alternatives)

Compliance Requirements:

RoHS3 Compliant (mandatory)
REACH Unaffected or REACH Compliant

Substitutes are grouped into two categories: direct equivalents (matching lead spacing and case dimensions) and compatible alternatives (same electrical ratings with different mechanical footprints requiring PCB evaluation).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Lead Spacing	Case Diameter	Height	Impedance	Product Status
UTT1E101MPD	Nichicon	100 µF	25 V	5000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.354" (9.00mm)	680 mOhms	Obsolete
UPW1V101MPD	Nichicon	100 µF	35 V	3000 Hrs	0.138" (4.60mm)	0.315" (8.00mm)	0.453" (11.50mm)	117 mOhms	Not For New Designs
UHE1E101MED	Nichicon	100 µF	25 V	5000 Hrs	0.098" (2.50mm)	0.248" (6.30mm)	0.433" (11.00mm)	220 mOhms	Obsolete
UHD1E101MED	Nichicon	100 µF	25 V	2000 Hrs	0.098" (2.50mm)	0.248" (6.30mm)	0.492" (12.50mm)	130 mOhms	Obsolete
UHV1E101MED	Nichicon	100 µF	25 V	5000 Hrs	0.098" (2.50mm)	0.248" (6.30mm)	0.492" (12.50mm)	100 mOhms	Obsolete
EEU-FM1E101	Panasonic	100 µF	25 V	2000 Hrs	0.098" (2.50mm)	0.248" (6.30mm)	0.500" (12.70mm)	130 mOhms	Active
EEU-FM1E101B	Panasonic	100 µF	25 V	2000 Hrs	0.197" (5.00mm)	0.248" (6.30mm)	0.500" (12.70mm)	130 mOhms	Active
EEU-FR1E101	Panasonic	100 µF	25 V	5000 Hrs	0.098" (2.50mm)	0.248" (6.30mm)	0.500" (12.70mm)	130 mOhms	Active
EEU-FR1E101B	Panasonic	100 µF	25 V	5000 Hrs	0.197" (5.00mm)	0.248" (6.30mm)	0.500" (12.70mm)	130 mOhms	Active
EKZE250ELL101MF11D	Chemi-Con	100 µF	25 V	2000 Hrs	0.098" (2.50mm)	0.248" (6.30mm)	0.433" (11.00mm)	130 mOhms	Active

Engineering Selection Recommendations

Direct Mechanical Equivalents (Lead Spacing 0.138" / 4.60mm):

The UPW1V101MPD maintains identical lead spacing and case diameter to the UTT1E101MPD. However, it carries a "Not For New Designs" status and exhibits reduced lifetime (3000 Hrs vs. 5000 Hrs @ 105°C). Selection of this part is acceptable only for legacy system maintenance where PCB layout cannot be modified. The higher voltage rating (35 V) provides additional derating margin but does not compensate for the reduced operational lifetime.

Compatible Alternatives (Lead Spacing 0.098" / 2.50mm):

The Nichicon UHE1E101MED, UHV1E101MED, and Panasonic EEU-FR1E101 / EEU-FR1E101B series provide 5000-hour lifetime ratings matching the original specification. These parts require PCB redesign due to reduced lead spacing (0.098" vs. 0.138") and smaller case diameter (0.248" vs. 0.315"). The UHE1E101MED and UHV1E101MED are obsolete but remain in stock. The Panasonic EEU-FR series (Active status) represents the preferred long-term solution for new production.

Alternative Spacing Options (Lead Spacing 0.197" / 5.00mm):

The Panasonic EEU-FM1E101B and EEU-FR1E101B offer wider lead spacing (0.197") suitable for applications with larger PCB pitch requirements. The EEU-FR1E101B maintains the 5000-hour lifetime specification and Active product status, making it suitable for new designs. The EEU-FM1E101B provides only 2000-hour lifetime and should be evaluated against circuit reliability requirements.

Compliance Status:

All listed substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the UPW1V101MPD be used as a direct replacement for the UTT1E101MPD?

A: The UPW1V101MPD provides mechanical compatibility (identical lead spacing and case diameter) but carries reduced lifetime (3000 Hrs vs. 5000 Hrs @ 105°C) and "Not For New Designs" status. It is acceptable for legacy maintenance only. For new production, active-status alternatives are preferred.

Q: What is the impact of using a substitute with different lead spacing?

A: Substitutes with 0.098" (2.50mm) lead spacing require PCB redesign. The through-hole pad pattern must be modified to accommodate the narrower spacing. Mechanical clearance and component density must be re-evaluated. No electrical impact occurs; the change is purely mechanical.

Q: Why do some substitutes have lower lifetime ratings?

A: Lifetime ratings reflect the capacitor's thermal endurance at maximum operating temperature (105°C). Parts rated for 2000 Hrs vs. 5000 Hrs have different internal construction and electrolyte formulations. Selection depends on circuit duty cycle and reliability requirements. If the original design specified 5000 Hrs, substitutes with lower ratings require circuit analysis to confirm acceptability.

Q: Is the Panasonic EEU-FR1E101B suitable for new designs?

A: Yes. The EEU-FR1E101B carries Active product status, maintains 5000-hour lifetime @ 105°C, and is ROHS3 compliant. It is the recommended choice for new production requiring 5000-hour reliability. Lead spacing is 0.197" (5.00mm), requiring PCB layout adjustment.

Q: What is the difference between EEU-FM and EEU-FR series?

A: The EEU-FM series (FM-A) is rated for 2000 Hrs @ 105°C. The EEU-FR series (FR-A) is rated for 5000 Hrs @ 105°C. Both are Panasonic Active products with identical electrical ratings (100 µF, 25 V, ±20%). Selection depends on required operational lifetime. For applications originally designed with 5000-hour components, the EEU-FR series maintains specification compliance.

Q: Can substitutes with higher voltage ratings be used?

A: Yes. A 35 V rated capacitor (UPW1V101MPD) can replace a 25 V rated part in the same circuit. The higher voltage rating provides additional safety margin and derating. However, physical dimensions and lifetime specifications must still be evaluated for compatibility.

Q: Are there mechanical constraints when selecting between different case diameters?

A: Yes. The original UTT1E101MPD uses 0.315" (8.00mm) diameter. Substitutes with 0.248" (6.30mm) diameter are physically smaller and may fit in tighter spaces but require PCB pad pattern modification. Verify mounting hole clearance and component density before selection.

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