ECA-2AM331B Equivalent & Substitute Parts

Part Overview

The ECA-2AM331B is a 330 µF, 100 V aluminum electrolytic capacitor in radial configuration manufactured by Panasonic Electronic Components. This component is rated for 2000 hours at 85°C and operates across -40°C to 85°C. The part is currently active and available in cut tape packaging with 1080 pieces in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand enhanced performance characteristics such as extended temperature ratings or improved ripple current handling, or when alternative manufacturers' components meet identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	100 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Lead Spacing	0.197" (5.00mm)
Case Diameter	0.492" Dia (12.50mm)
Height (Seated Max)	1.063" (27.00mm)
Mounting Type	Through Hole
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ECA-2AM331B is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Capacitance: 330 µF
Voltage Rating: 100 V
Tolerance: ±20%
Polarization: Polar
Mounting Type: Through Hole
Package/Case: Radial, Can

Mechanical Compatibility Parameters:

Lead Spacing: 0.197" (5.00mm)
Case Diameter: 0.492" Dia (12.50mm)
Height: 1.063" (27.00mm) maximum

Performance Parameters:

Lifetime @ Temperature: 2000 Hrs @ 85°C minimum
Operating Temperature Range: -40°C ~ 85°C minimum

Parts are classified into the following categories:

Direct Equivalent: Parts matching all critical, mechanical, and performance parameters with identical packaging specifications.

Upgrade Equivalent: Parts matching all critical and mechanical parameters with enhanced performance characteristics (extended temperature rating or improved lifetime at higher temperatures).

Similar Equivalent: Parts matching all critical and electrical parameters but with different mechanical dimensions (lead spacing, case diameter, or height).

Parametric Equivalent: Parts matching all critical parameters with identical mechanical footprint and performance ratings.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Lead Spacing	Case Diameter	Height (Max)	Product Status	Packaging	Inventory
ECA-2AM331B	Panasonic	M-A	330 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.492" (12.50mm)	1.063" (27.00mm)	Active	Cut Tape	1080 Pcs
ESMG101ELL331MK25S	Chemi-Con	SMG	330 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.492" (12.50mm)	1.043" (26.50mm)	Active	Bulk	1568 Pcs
UVK2A331MHD	Nichicon	UVK	330 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.492" (12.50mm)	1.063" (27.00mm)	Not For New Designs	Bulk	969 Pcs
100PX330MEFC12.5X25	Rubycon	PX	330 µF	100 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	0.197" (5.00mm)	0.492" (12.50mm)	1.043" (26.50mm)	Active	Bulk	4200 Pcs
UFW2A331MHD1TO	Nichicon	UFW	330 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.492" (12.50mm)	1.063" (27.00mm)	Not For New Designs	Cut Tape	1282 Pcs
UKL2A331MHD	Nichicon	UKL	330 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.295" (7.50mm)	0.630" (16.00mm)	1.299" (33.00mm)	Not For New Designs	Bulk	1365 Pcs
URS2A331MHD	Nichicon	URS	330 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.295" (7.50mm)	0.709" (18.00mm)	0.650" (16.50mm)	Active	Bulk	2122 Pcs
UVK2A331MHD1TO	Nichicon	UVK	330 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.492" (12.50mm)	1.063" (27.00mm)	Not For New Designs	Cut Tape	1110 Pcs
UVR2A331MHD1TO	Nichicon	UVR	330 µF	100 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.197" (5.00mm)	0.492" (12.50mm)	1.063" (27.00mm)	Not For New Designs	Cut Tape	1421 Pcs

Engineering Selection Recommendations

For Direct Replacement (Identical Footprint and Performance):

ESMG101ELL331MK25S (Chemi-Con SMG series) is a direct equivalent with matching electrical specifications and mechanical compatibility. This part is active and suitable for new designs. The height difference of 0.020" (0.50mm) is within typical PCB layout tolerances for through-hole components.

For Enhanced Performance Applications:

100PX330MEFC12.5X25 (Rubycon PX series) provides upgraded performance with extended operating temperature range (-55°C ~ 105°C) and lifetime rating of 2000 hours at 105°C. This part is active and recommended for applications requiring higher temperature margins. Mechanical footprint remains compatible with the original design.

For Existing Inventory Compatibility:

UVK2A331MHD1TO and UVR2A331MHD1TO (Nichicon UVK and UVR series) maintain identical mechanical footprint and electrical specifications. Both are available in cut tape packaging matching the original part's packaging format. Note that these parts carry "Not For New Designs" status.

For Alternative Mechanical Configurations:

UKL2A331MHD and URS2A331MHD (Nichicon UKL and URS series) provide equivalent electrical performance with different mechanical dimensions. These parts are suitable only when PCB layout permits larger footprints. URS2A331MHD is active; UKL2A331MHD carries "Not For New Designs" status.

Compliance Considerations:

All listed parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the primary part.

Frequently Asked Questions (FAQ)

Q: Can ESMG101ELL331MK25S be used as a direct drop-in replacement for ECA-2AM331B?

A: Yes. Both parts share identical electrical specifications (330 µF, 100 V, ±20% tolerance) and mechanical compatibility (0.197" lead spacing, 0.492" case diameter). The height difference of 0.020" is within standard PCB layout tolerances for through-hole components.

Q: What is the advantage of using 100PX330MEFC12.5X25 over the original part?

A: The Rubycon PX series offers extended operating temperature range (-55°C ~ 105°C versus -40°C ~ 85°C) and maintains 2000-hour lifetime at 105°C instead of 85°C. This provides additional thermal margin for applications operating in elevated temperature environments.

Q: Why are some substitute parts marked "Not For New Designs"?

A: Parts with "Not For New Designs" status indicate that the manufacturer has discontinued or is phasing out the product line. These parts remain functionally equivalent but should not be selected for new product development. They are suitable for legacy system maintenance or existing inventory utilization.

Q: Can UKL2A331MHD or URS2A331MHD be used if the original PCB layout cannot accommodate them?

A: No. These parts have different mechanical dimensions (larger lead spacing, case diameter, and height). They require PCB redesign and cannot be used as direct replacements without layout modifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of ECA-2AM331B.

Q: What is the difference between cut tape and bulk packaging?

A: Cut tape packaging provides individual component strips suitable for automated pick-and-place assembly. Bulk packaging contains loose components. The original ECA-2AM331B is supplied in cut tape; equivalent parts in bulk packaging require reeling or manual handling for automated assembly processes.

Q: Which substitute part offers the best inventory availability?

A: 100PX330MEFC12.5X25 (Rubycon PX series) has the highest inventory level at 4200 pieces, combined with active product status and enhanced performance specifications.

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