EET-HC2W181BA Equivalent & Substitute Parts

Part Overview

The EET-HC2W181BA is a 180 µF, 450 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Panasonic Electronic Components. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. The part operates across a temperature range of -25°C to 105°C with a rated lifetime of 2000 hours at 105°C, serving general-purpose applications requiring high-voltage energy storage and filtering.

Key Parameters

Parameter	Value
Capacitance	180 µF
Voltage Rating	450 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
Diameter	0.866" (22.00 mm)
Height (Seated Max)	1.850" (47.00 mm)
Operating Temperature Range	-25°C to 105°C
Lifetime @ 105°C	2000 Hours
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict compliance with the following electrical and mechanical parameters:

Critical Matching Parameters:

Capacitance: 180 µF (exact match required)
Voltage Rating: 450 V (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Diameter: 0.866" (22.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

Acceptable Variation Parameters:

Height (Seated Max): Up to 1.858" (47.20 mm) permitted
Lifetime @ 105°C: Equal to or greater than 2000 hours
Operating Temperature Range: Equal to or broader than -25°C to 105°C
ESR: Lower values acceptable (improved performance)
Ripple Current: Equal to or greater than specified values

All substitute parts listed meet these criteria and are direct functional equivalents for the EET-HC2W181BA.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR @ Frequency	Lifetime @ 105°C	Operating Temp Range	Height (Max)	Product Status
EET-HC2W181BA	Panasonic	180 µF	450 V	±20%	1.013 Ω @ 120 Hz	2000 Hrs	-25°C to 105°C	1.850"	Obsolete
B43508A5187M2	EPCOS - TDK Electronics	180 µF	450 V	±20%	680 mΩ @ 100 Hz	3000 Hrs	-40°C to 105°C	1.850"	Active
B43508A5187M60	EPCOS - TDK Electronics	180 µF	450 V	±20%	680 mΩ @ 100 Hz	3000 Hrs	-40°C to 105°C	1.850"	Active
B43508A5187M62	EPCOS - TDK Electronics	180 µF	450 V	±20%	680 mΩ @ 100 Hz	3000 Hrs	-40°C to 105°C	1.850"	Active
B43508A5187M67	EPCOS - TDK Electronics	180 µF	450 V	±20%	680 mΩ @ 100 Hz	3000 Hrs	-40°C to 105°C	1.850"	Active
B43508A5187M7	EPCOS - TDK Electronics	180 µF	450 V	±20%	680 mΩ @ 100 Hz	3000 Hrs	-40°C to 105°C	1.850"	Active
B43508A5187M80	EPCOS - TDK Electronics	180 µF	450 V	±20%	680 mΩ @ 100 Hz	3000 Hrs	-40°C to 105°C	1.858"	Active
B43508A5187M82	EPCOS - TDK Electronics	180 µF	450 V	±20%	680 mΩ @ 100 Hz	3000 Hrs	-40°C to 105°C	1.858"	Active
B43508A5187M87	EPCOS - TDK Electronics	180 µF	450 V	±20%	680 mΩ @ 100 Hz	3000 Hrs	-40°C to 105°C	1.858"	Active
LAR2W181MELZ45	Nichicon	180 µF	450 V	±20%	Not specified	2000 Hrs	-25°C to 105°C	1.772"	Active
LGN2W181MELZ45	Nichicon	180 µF	450 V	±20%	Not specified	3000 Hrs	-25°C to 105°C	1.850"	Active

Engineering Selection Recommendations

EPCOS - TDK Electronics B43508 Series (B43508A5187M2, M60, M62, M67, M7, M80, M82, M87): These parts are active products with ROHS3 compliance and REACH unaffected status. The B43508 series offers improved performance characteristics with lower ESR (680 mΩ @ 100 Hz versus 1.013 Ω @ 120 Hz) and extended lifetime (3000 hours versus 2000 hours at 105°C). Operating temperature range extends to -40°C, providing broader environmental coverage. All variants maintain identical electrical specifications with minor height variations (1.850" to 1.858"). These parts are recommended for new designs and system upgrades requiring active product support.

Nichicon LAR2W181MELZ45: This part maintains the original operating temperature range (-25°C to 105°C) and lifetime specification (2000 hours at 105°C), providing closest functional parity to the EET-HC2W181BA. The LAR series is an active product with ROHS3 compliance. Height is slightly reduced at 1.772", which may provide space advantages in constrained layouts. This part is suitable for direct replacement in existing designs where thermal and lifetime requirements match the original specification.

Nichicon LGN2W181MELZ45: This part is an active product with ROHS3 compliance and extended lifetime (3000 hours at 105°C). It maintains the original operating temperature range and matches the height specification of the EET-HC2W181BA at 1.850". The LGN series provides improved reliability margin through extended operational life while preserving thermal characteristics of the original design.

Frequently Asked Questions (FAQ)

Q: Can I use a B43508 series part as a direct replacement for the EET-HC2W181BA?

A: Yes. The B43508 series parts (B43508A5187M2, M60, M62, M67, M7, M80, M82, M87) are direct functional equivalents. All critical parameters match: 180 µF capacitance, 450 V rating, ±20% tolerance, radial snap-in package, 10.00 mm lead spacing, and 22.00 mm diameter. The parts are physically compatible with existing PCB layouts. Height variation (1.850" to 1.858") is within acceptable mechanical tolerance for snap-in mounting.

Q: What is the difference between the various B43508 part numbers?

A: The B43508A5187M series variants (M2, M60, M62, M67, M7, M80, M82, M87) are electrically identical. The suffix designates manufacturing date codes or internal lead configuration variants. All share identical electrical specifications: 180 µF, 450 V, 680 mΩ ESR @ 100 Hz, and 3000-hour lifetime at 105°C. Selection among variants is based on inventory availability and manufacturing date requirements.

Q: How does the Nichicon LAR2W181MELZ45 compare to the EPCOS B43508 series?

A: Both are active products and direct replacements. The LAR series matches the original EET-HC2W181BA lifetime (2000 hours at 105°C) and operating temperature range (-25°C to 105°C). The B43508 series offers extended lifetime (3000 hours) and broader temperature range (-40°C to 105°C) with lower ESR. The LAR series provides closer specification alignment to the original part, while the B43508 series provides enhanced performance margins.

Q: Is the height difference between parts significant?

A: Height variations are within acceptable mechanical tolerance for snap-in mounting. The EET-HC2W181BA specifies 1.850" maximum seated height. The LAR2W181MELZ45 is 1.772" (0.078" shorter), and B43508 variants range from 1.850" to 1.858" (up to 0.008" taller). These differences do not affect electrical function or standard PCB mounting. Verify clearance in space-constrained applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All EPCOS - TDK Electronics B43508 series parts are ROHS3 compliant. Nichicon LAR and LGN series parts are ROHS3 compliant. All parts carry REACH unaffected status, confirming compliance with current environmental regulations.

Q: Can I mix different substitute part numbers in the same assembly?

A: Yes. All listed substitute parts are electrically and mechanically equivalent. Mixing part numbers from different manufacturers (EPCOS and Nichicon) or different variants within the B43508 series does not affect circuit function, as all meet identical electrical specifications for capacitance, voltage, tolerance, and performance characteristics.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message