EET-HC2S271KA Equivalent & Substitute Parts

Part Overview

The Panasonic EET-HC2S271KA is a 270 µF, 420 V aluminum electrolytic capacitor in radial, can snap-in package with through-hole mounting. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. 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	420 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
Diameter	1.181" (30.00 mm)
Height (Seated Max)	1.260" (32.00 mm)
Operating Temperature	-25°C to 105°C
Polarization	Polar

Substitute Part Grouping Explanation

Substitution for the EET-HC2S271KA is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Capacitance: 270 µF
Voltage Rating: 420 V minimum (higher voltage ratings are acceptable upgrades)
Tolerance: ±20%
Polarization: Polar
Package Type: Radial, Can - Snap-In
Mounting Type: Through Hole
Lead Spacing: 0.394" (10.00 mm)
Diameter: 1.181" (30.00 mm)

Acceptable Variation:

Height: Parts with seated height up to 1.260" (32.00 mm) are direct substitutes; parts with reduced height (27.00 mm or 27.50 mm) are acceptable where space permits
Lifetime @ 105°C: Parts with equal or greater lifetime rating are acceptable
Operating Temperature: Must maintain -25°C to 105°C range

Upgrade Classification: Parts rated at 450 V are classified as upgrades, providing enhanced voltage margin while maintaining all other electrical and mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Height (Max)	Lifetime @ 105°C	Status
EET-HC2S271KA	Panasonic	TS-HC	270 µF	420 V	±20%	1.260" (32.00 mm)	2000 Hrs	Obsolete
420MXG270MEFCSN30X30	Rubycon	MXG	270 µF	420 V	±20%	1.260" (32.00 mm)	3000 Hrs	Active
420MXK270MEFC30X25	Rubycon	MXK	270 µF	420 V	±20%	1.063" (27.00 mm)	3000 Hrs	Active
EKMW421VSN271MR25S	Chemi-Con	KMW	270 µF	420 V	±20%	1.083" (27.50 mm)	2000 Hrs	Active
LGNW6271MELB30	Nichicon	LGN	270 µF	420 V	±20%	1.260" (32.00 mm)	3000 Hrs	Active
LQSW6271MELB30	Nichicon	LQS	270 µF	420 V	±20%	1.260" (32.00 mm)	3000 Hrs	Active
450MXG270MEFCSN30X30	Rubycon	MXG	270 µF	450 V	±20%	1.260" (32.00 mm)	3000 Hrs	Active
450MXH270MEFCSN30X30	Rubycon	MXH	270 µF	450 V	±20%	1.260" (32.00 mm)	2000 Hrs	Active
450MXK270MEFCSN30X30	Rubycon	MXK	270 µF	450 V	±20%	1.260" (32.00 mm)	3000 Hrs	Active
450VXH270MEFCSN30X30	Rubycon	VXH	270 µF	450 V	±20%	1.260" (32.00 mm)	5000 Hrs	Active
EKMR451VSN271MR30S	Chemi-Con	KMR	270 µF	450 V	±20%	1.280" (32.50 mm)	2000 Hrs	Active

Engineering Selection Recommendations

Direct Substitutes (420 V Rating):

For applications requiring exact voltage specification, the following active parts provide direct substitution with improved or equivalent performance characteristics:

420MXG270MEFCSN30X30 (Rubycon MXG): Identical mechanical footprint with extended lifetime (3000 hours vs. 2000 hours). RoHS3 compliant. Recommended for space-constrained applications requiring maximum reliability.
LGNW6271MELB30 and LQSW6271MELB30 (Nichicon LGN/LQS): Both maintain original dimensions and provide 3000-hour lifetime rating. RoHS3 compliant. LQSW6271MELB30 offers significantly higher inventory availability (84,200 units).
EKMW421VSN271MR25S (Chemi-Con KMW): Reduced height (27.50 mm) suitable for compact designs. Maintains 2000-hour lifetime. RoHS compliant.
420MXK270MEFC30X25 (Rubycon MXK): Compact height option (27.00 mm) with 3000-hour lifetime and highest inventory availability (273,882 units). RoHS3 compliant.

Upgrade Substitutes (450 V Rating):

For applications where voltage margin enhancement is acceptable, 450 V rated parts provide superior performance:

450VXH270MEFCSN30X30 (Rubycon VXH): Premium option with 5000-hour lifetime at 105°C, highest reliability rating among all substitutes. Maintains original dimensions. RoHS3 compliant.
450MXK270MEFCSN30X30 (Rubycon MXK): 450 V upgrade with 3000-hour lifetime and identical mechanical footprint. RoHS3 compliant.
450MXG270MEFCSN30X30 (Rubycon MXG): 450 V upgrade with 3000-hour lifetime and maximum inventory availability (1,000,400 units). RoHS3 compliant.
EKMR451VSN271MR30S (Chemi-Con KMR): 450 V upgrade with 2000-hour lifetime. Slightly increased height (32.50 mm). RoHS3 compliant.

All substitute parts maintain the critical electrical parameters (270 µF capacitance, ±20% tolerance, polar configuration) and mechanical compatibility (radial snap-in package, 10.00 mm lead spacing, 30.00 mm diameter, through-hole mounting).

Frequently Asked Questions (FAQ)

Q: Can I use a 450 V rated capacitor in place of the 420 V EET-HC2S271KA?

A: Yes. A higher voltage rating provides additional safety margin and is electrically compatible. The 450 V parts listed are classified as upgrades and will function correctly in any application designed for 420 V operation.

Q: What is the significance of the height variation between 27.00 mm, 27.50 mm, and 32.00 mm?

A: Height variation affects PCB layout and enclosure clearance. Parts with reduced height (27.00 mm or 27.50 mm) are suitable for space-constrained applications. Parts with original height (32.00 mm) maintain exact mechanical compatibility with the obsolete EET-HC2S271KA.

Q: Why do some substitutes have different lifetime ratings?

A: Lifetime rating (measured in hours at 105°C) reflects the capacitor's expected operational duration under specified thermal stress. Parts with 3000-hour or 5000-hour ratings provide extended service life compared to the original 2000-hour specification. Selection depends on application reliability requirements.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed are RoHS3 compliant or RoHS compliant. The original EET-HC2S271KA is REACH affected; all substitutes are REACH unaffected or not applicable.

Q: Which substitute offers the best inventory availability?

A: The 420MXK270MEFC30X25 (Rubycon MXK) provides the highest inventory level at 273,882 units, followed by LQSW6271MELB30 (Nichicon LQS) at 84,200 units. For 450 V upgrades, 450MXG270MEFCSN30X30 (Rubycon MXG) offers 1,000,400 units.

Q: Can I mix different substitute parts in the same application?

A: Yes, provided all parts meet the application's electrical requirements (270 µF, minimum 420 V rating, ±20% tolerance). Mechanical compatibility must be verified against PCB layout constraints, particularly regarding height and lead spacing.

Q: What is the difference between direct substitutes and upgrade substitutes?

A: Direct substitutes maintain the original 420 V voltage rating. Upgrade substitutes are rated at 450 V, providing higher voltage margin. Both categories maintain identical capacitance, tolerance, and mechanical compatibility.

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