ECA-2WM4R7B Equivalent & Substitute Parts

Part Overview

The ECA-2WM4R7B is a 4.7 µF, 450 V aluminum electrolytic capacitor in radial, can package manufactured by Panasonic Electronic Components. This component is rated for 2000 hours at 85°C and is designed for general-purpose applications requiring reliable energy storage and filtering in power supply circuits. The part is Active status and ROHS3 compliant. Substitute parts are necessary when the original part becomes unavailable, when packaging requirements differ, or when enhanced thermal performance is required for specific application environments.

Key Parameters

Parameter	Value
Capacitance	4.7 µF
Voltage Rating	450 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-25°C ~ 85°C
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)
Height (Seated Max)	0.866" (22.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility for the ECA-2WM4R7B is determined by strict equivalence in the following parameters: capacitance (4.7 µF), voltage rating (450 V), tolerance (±20%), lead spacing (5.00 mm), case diameter (10.00 mm), mounting type (Through Hole), and package type (Radial, Can). All substitute parts listed maintain these core electrical and mechanical specifications. Variations in lifetime rating, operating temperature range, ripple current specifications, and packaging format (Tape & Box, Cut Tape, or Bulk) do not disqualify a part from substitution provided the primary parameters remain constant. Product status and thermal performance characteristics are secondary considerations for component selection.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Lead Spacing	Height (Max)	Packaging	Product Status
ECA-2WM4R7B	Panasonic	4.7 µF	450 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	5.00 mm	22.00 mm	Tape & Box	Active
ECA-2WHG4R7B	Panasonic	4.7 µF	450 V	±20%	2000 Hrs @ 105°C	-25°C ~ 105°C	5.00 mm	22.00 mm	Cut Tape	Active
ECA-2WM4R7	Panasonic	4.7 µF	450 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	5.00 mm	22.00 mm	Bulk	Active
MAL214237478E3	Vishay Beyschlag/Draloric/BC Components	4.7 µF	450 V	±20%	2500 Hrs @ 105°C	-40°C ~ 105°C	5.00 mm	17.50 mm	Cut Tape	Active
ESMG451ELL4R7MJ20S	Chemi-Con	4.7 µF	450 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	5.00 mm	21.50 mm	Bulk	Active
UVK2W4R7MPD	Nichicon	4.7 µF	450 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	5.00 mm	14.00 mm	Bulk	Not For New Designs
UVR2W4R7MPD	Nichicon	4.7 µF	450 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	5.00 mm	22.00 mm	Bulk	Not For New Designs
UVR2W4R7MPD1TD	Nichicon	4.7 µF	450 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	5.00 mm	22.00 mm	Cut Tape	Not For New Designs

Engineering Selection Recommendations

For new designs, select from Active status parts: ECA-2WHG4R7B, ECA-2WM4R7, or MAL214237478E3. The ECA-2WHG4R7B offers extended thermal performance (2000 Hrs @ 105°C) with an expanded operating temperature range (-25°C ~ 105°C) while maintaining identical electrical specifications and mechanical footprint. The MAL214237478E3 provides the longest lifetime rating (2500 Hrs @ 105°C) and widest operating temperature range (-40°C ~ 105°C), with a reduced height of 17.50 mm suitable for space-constrained layouts.

For existing designs where component availability is critical, the ESMG451ELL4R7MJ20S from Chemi-Con maintains Active status and identical thermal specifications to the original part. Parts designated "Not For New Designs" (UVK2W4R7MPD, UVR2W4R7MPD, UVR2W4R7MPD1TD) are suitable only for legacy system maintenance or repair applications. All listed substitutes maintain ROHS3 compliance and identical electrical ratings (4.7 µF, 450 V, ±20%).

Frequently Asked Questions (FAQ)

Q: Can ECA-2WHG4R7B replace ECA-2WM4R7B directly?

A: Yes. Both parts share identical capacitance (4.7 µF), voltage rating (450 V), tolerance (±20%), lead spacing (5.00 mm), case diameter (10.00 mm), and height (22.00 mm). The ECA-2WHG4R7B offers superior thermal performance (105°C vs 85°C) and extended operating temperature range. Packaging differs (Cut Tape vs Tape & Box), which affects procurement and assembly handling but not electrical or mechanical compatibility.

Q: Why is MAL214237478E3 shorter (17.50 mm vs 22.00 mm)?

A: The MAL214237478E3 achieves equivalent capacitance and voltage rating through different internal construction. The reduced height is a design characteristic of the Vishay Beyschlag/Draloric/BC Components 142 RHS series. Verify PCB layout clearance before substitution in space-constrained applications.

Q: Are Nichicon UVK and UVR series suitable for new production?

A: No. UVK2W4R7MPD, UVR2W4R7MPD, and UVR2W4R7MPD1TD are designated "Not For New Designs." These parts are restricted to maintenance and repair of existing systems only. For new designs, use Active status alternatives: ECA-2WHG4R7B, ECA-2WM4R7, or MAL214237478E3.

Q: What is the difference between Tape & Box, Cut Tape, and Bulk packaging?

A: Packaging format affects component delivery and assembly automation. Tape & Box and Cut Tape are suitable for automated pick-and-place assembly. Bulk packaging is used for manual assembly or high-volume reel-based processes. Electrical and mechanical specifications remain identical across all packaging formats.

Q: Can I substitute based on ripple current ratings alone?

A: No. Ripple current specifications vary between manufacturers and series but do not determine substitution eligibility. Substitution is based strictly on capacitance, voltage rating, tolerance, lead spacing, case diameter, and mounting type. Ripple current is an application-specific performance characteristic; verify that the substitute part meets your circuit's ripple current requirements independently.

Q: Is thermal performance a substitution requirement?

A: No. Thermal performance (lifetime at temperature and operating temperature range) is a secondary selection criterion. All listed parts maintain the core electrical and mechanical specifications required for direct substitution. Enhanced thermal performance (such as ECA-2WHG4R7B at 105°C) is an advantage for applications requiring extended reliability in high-temperature environments but is not mandatory for substitution.

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