EET-HC2W271DF Equivalent & Substitute Parts

Part Overview

The EET-HC2W271DF is a 270 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, suitable for general-purpose applications requiring high-voltage energy storage and filtering.

Key Parameters

Parameter	Value
Capacitance	270 µF
Voltage Rating	450 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00mm)
Size / Dimension	1.181" Dia (30.00mm)
Height - Seated (Max)	1.457" (37.00mm)
Polarization	Polar
Operating Temperature	-25°C ~ 105°C
Applications	General Purpose

Substitute Part Grouping Explanation

Substitution for the EET-HC2W271DF is determined by strict equivalence across the following electrical and mechanical parameters:

Capacitance: 270 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" (10.00mm) (exact match required)
Size / Dimension: 1.181" Dia (30.00mm) (exact match required)
Mounting Type: Through Hole (exact match required)

All substitute parts listed maintain these core parameters. Variations in ESR, lifetime rating, and operating temperature range are secondary characteristics that do not prevent functional substitution within the specified electrical and mechanical constraints.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR @ Frequency	Lifetime @ 105°C	Operating Temp Range	Lead Spacing	Size / Dimension	Height (Max)	Product Status
EET-HC2W271DF	Panasonic Electronic Components	270 µF	450 V	±20%	675 mOhm @ 120 Hz	2000 Hrs	-25°C ~ 105°C	0.394" (10.00mm)	1.181" Dia (30.00mm)	1.457" (37.00mm)	Obsolete
B43508B5277M002	EPCOS - TDK Electronics	270 µF	450 V	±20%	460 mOhm @ 100 Hz	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	1.181" Dia (30.00mm)	1.457" (37.00mm)	Active
B43508B5277M60	EPCOS - TDK Electronics	270 µF	450 V	±20%	460 mOhm @ 100 Hz	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	1.181" Dia (30.00mm)	1.457" (37.00mm)	Active
B43508B5277M62	EPCOS - TDK Electronics	270 µF	450 V	±20%	460 mOhm @ 100 Hz	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	1.181" Dia (30.00mm)	1.457" (37.00mm)	Active
B43508B5277M67	EPCOS - TDK Electronics	270 µF	450 V	±20%	460 mOhm @ 100 Hz	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	1.181" Dia (30.00mm)	1.457" (37.00mm)	Active
B43508B5277M7	EPCOS - TDK Electronics	270 µF	450 V	±20%	460 mOhm @ 100 Hz	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	1.181" Dia (30.00mm)	1.457" (37.00mm)	Active
B43508B5277M80	EPCOS - TDK Electronics	270 µF	450 V	±20%	460 mOhm @ 100 Hz	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	1.181" Dia (30.00mm)	1.465" (37.20mm)	Active
B43508B5277M82	EPCOS - TDK Electronics	270 µF	450 V	±20%	460 mOhm @ 100 Hz	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	1.181" Dia (30.00mm)	1.465" (37.20mm)	Active
B43508B5277M87	EPCOS - TDK Electronics	270 µF	450 V	±20%	460 mOhm @ 100 Hz	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	1.181" Dia (30.00mm)	1.465" (37.20mm)	Active
B43640B5277M000	EPCOS - TDK Electronics	270 µF	450 V	±20%	360 mOhm @ 100 Hz	2000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	Not specified	Not specified	Active
B43644B5277M000	EPCOS - TDK Electronics	270 µF	450 V	±20%	370 mOhm @ 100 Hz	5000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	1.181" Dia (30.00mm)	1.457" (37.00mm)	Active

Engineering Selection Recommendations

All listed substitute parts are manufactured by EPCOS - TDK Electronics and carry active product status, ensuring long-term availability and supply chain continuity. The B43508 series variants (B43508B5277M002, B43508B5277M60, B43508B5277M62, B43508B5277M67, B43508B5277M7, B43508B5277M80, B43508B5277M82, B43508B5277M87) are ROHS3 compliant and offer improved performance characteristics compared to the obsolete EET-HC2W271DF, including lower ESR (460 mOhm @ 100 Hz versus 675 mOhm @ 120 Hz) and extended lifetime rating (3000 hours at 105°C).

The B43644B5277M000 provides the highest reliability specification with 5000-hour lifetime at 105°C and the lowest ESR at 370 mOhm @ 100 Hz, suitable for applications requiring extended operational life and reduced thermal stress.

The B43640B5277M000 maintains the original 2000-hour lifetime specification while offering improved ESR performance at 360 mOhm @ 100 Hz.

All substitute parts maintain identical electrical ratings (270 µF, 450 V, ±20% tolerance) and mechanical compatibility (radial snap-in package, 10.00mm lead spacing, 30.00mm diameter) with the original component.

Frequently Asked Questions (FAQ)

Q: Can B43508B5277M series parts directly replace the EET-HC2W271DF?

A: Yes. The B43508B5277M series maintains identical capacitance (270 µF), voltage rating (450 V), tolerance (±20%), package type (radial snap-in), lead spacing (10.00mm), and physical dimensions (1.181" diameter). The parts are mechanically and electrically interchangeable.

Q: What is the difference between the B43508 and B43644 series?

A: Both series meet the core substitution criteria. The B43644B5277M000 offers extended lifetime (5000 hours at 105°C versus 3000 hours) and lower ESR (370 mOhm @ 100 Hz versus 460 mOhm @ 100 Hz), providing improved performance for demanding applications.

Q: Are there height differences between substitute parts?

A: Most B43508 variants specify 1.457" (37.00mm) maximum seated height. The B43508B5277M80, B43508B5277M82, and B43508B5277M87 specify 1.465" (37.20mm). These minor variations remain within typical PCB layout tolerances for through-hole snap-in capacitors.

Q: What compliance certifications apply to substitute parts?

A: All EPCOS - TDK Electronics substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Why is ESR lower in substitute parts?

A: ESR is measured at different frequencies (100 Hz for substitutes versus 120 Hz for the original). Lower ESR values indicate improved performance characteristics and reduced thermal dissipation during operation.

Q: Is the B43640B5277M000 suitable for direct replacement?

A: Yes, the B43640B5277M000 meets all core substitution criteria. However, specific physical dimensions are not provided in the datasheet. Mechanical verification is recommended before implementation in space-constrained applications.

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