EET-HC2W181KA Equivalent & Substitute Parts

Part Overview

The Panasonic EET-HC2W181KA is a 180 µF, 450 V aluminum electrolytic capacitor in radial, can snap-in package format, designed for general purpose applications. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and production continuity. The TS-HC series has been discontinued, requiring engineers to identify functionally compatible alternatives from active product lines that maintain electrical and mechanical compatibility.

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)
Case Diameter	1.181" (30.00 mm)
Polarization	Polar
Operating Temperature Range	-25°C to 105°C

Substitute Part Grouping Explanation

Substitution eligibility for the EET-HC2W181KA is determined by strict adherence to the following parameters:

Primary Matching Criteria (Non-Negotiable):

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)
Case Diameter: 1.181" (30.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

Secondary Compatibility Parameters:

ESR (Equivalent Series Resistance): Lower or equal values are acceptable
Lifetime @ Temperature: Equal or greater values are acceptable
Operating Temperature Range: Must encompass or exceed the original range
Ripple Current Ratings: Equal or greater values are acceptable

All substitute parts listed below meet the primary matching criteria. Variations in secondary parameters represent performance improvements or equivalent specifications.

Parameter Comparison

Parameter	EET-HC2W181KA (Original)	B43508C5187M000	B43508C5187M2	B43508C5187M60	B43508C5187M62	B43508C5187M67	B43508C5187M7	B43508C5187M80	B43508C5187M82	B43508C5187M87	B43640C5187M000
Manufacturer	Panasonic	EPCOS - TDK	EPCOS - TDK	EPCOS - TDK	EPCOS - TDK	EPCOS - TDK	EPCOS - TDK	EPCOS - TDK	EPCOS - TDK	EPCOS - TDK	EPCOS - TDK
Capacitance	180 µF	180 µF	180 µF	180 µF	180 µF	180 µF	180 µF	180 µF	180 µF	180 µF	180 µF
Voltage Rating	450 V	450 V	450 V	450 V	450 V	450 V	450 V	450 V	450 V	450 V	450 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Case Diameter	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)
Height - Seated (Max)	1.260" (32.00 mm)	1.260" (32.00 mm)	1.260" (32.00 mm)	1.260" (32.00 mm)	1.260" (32.00 mm)	1.260" (32.00 mm)	1.260" (32.00 mm)	1.268" (32.20 mm)	1.268" (32.20 mm)	1.268" (32.20 mm)	1.063" (27.00 mm)
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
ESR @ 100 Hz	1.013 Ω @ 120 Hz	680 mΩ	680 mΩ	680 mΩ	680 mΩ	680 mΩ	680 mΩ	680 mΩ	680 mΩ	680 mΩ	550 mΩ
Lifetime @ 105°C	2000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs	2000 Hrs
Operating Temperature	-25°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C
Ripple Current @ 100 Hz	870 mA @ 120 Hz	1.01 A	1.01 A	1.01 A	1.01 A	1.01 A	1.01 A	1.01 A	1.01 A	1.01 A	910 mA
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All listed EPCOS - TDK Electronics B43508 and B43640 series parts are direct functional equivalents to the obsolete Panasonic EET-HC2W181KA. Selection among these alternatives is based on product availability, compliance requirements, and mechanical constraints.

B43508 Series (B43508C5187M000, B43508C5187M2, B43508C5187M60, B43508C5187M62, B43508C5187M67, B43508C5187M7, B43508C5187M80, B43508C5187M82, B43508C5187M87): These variants represent different manufacturing dates and packaging configurations within the same electrical specification. All are ROHS3 compliant and REACH unaffected. The B43508 series offers improved ESR performance (680 mΩ versus 1.013 Ω) and extended lifetime rating (3000 hours versus 2000 hours at 105°C). Operating temperature range extends to -40°C, providing broader environmental coverage than the original part.

B43640C5187M000: This alternative offers the lowest ESR specification (550 mΩ) and maintains the original 2000-hour lifetime rating at 105°C. Height is reduced to 1.063" (27.00 mm), providing a more compact footprint while maintaining all other mechanical and electrical compatibility parameters. This variant is suitable for space-constrained applications.

All substitute parts carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The B43508 series is recommended for new designs requiring extended operational life. The B43640 series is recommended for applications with height constraints.

Frequently Asked Questions (FAQ)

Q: Can B43508C5187M series parts be used interchangeably with each other? A: Yes. All B43508C5187M variants (M000, M2, M60, M62, M67, M7, M80, M82, M87) share identical electrical specifications and mechanical dimensions. The suffix designations indicate manufacturing date codes or packaging configurations. They are electrically and mechanically interchangeable.

Q: What is the difference between the B43508 and B43640 series? A: Both series meet the primary substitution criteria for the EET-HC2W181KA. The B43640 series features lower ESR (550 mΩ versus 680 mΩ) and reduced height (1.063" versus 1.260"). The B43508 series offers extended lifetime rating (3000 hours versus 2000 hours at 105°C). Selection depends on application requirements for either thermal performance or physical space.

Q: Are there height compatibility concerns with the B43508C5187M80, B43508C5187M82, and B43508C5187M87 variants? A: These three variants have a maximum seated height of 1.268" (32.20 mm), compared to 1.260" (32.00 mm) for the original part and other B43508 variants. This 0.008" (0.20 mm) difference is within typical PCB layout tolerances for snap-in capacitor mounting. Clearance verification is recommended for applications with tight vertical constraints.

Q: Is the B43640C5187M000 suitable for all applications requiring the EET-HC2W181KA? A: The B43640 meets all primary electrical and mechanical substitution criteria. Its reduced height (1.063" versus 1.260") makes it suitable for space-constrained designs. However, the lower lifetime rating (2000 hours at 105°C versus 3000 hours for B43508 series) should be considered for applications requiring extended operational life at elevated temperatures.

Q: What compliance advantages do the substitute parts offer? A: All EPCOS - TDK substitute parts are ROHS3 compliant and REACH unaffected, compared to the original Panasonic part which is REACH affected. This provides regulatory compliance benefits for new product designs and markets with strict environmental requirements.

Q: Can the operating temperature range difference affect compatibility? A: The substitute parts operate from -40°C to 105°C, compared to the original -25°C to 105°C range. This extended lower temperature capability provides additional operational margin and is fully backward compatible with the original specification.

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