Equivalent & Substitute Parts for EET-HC2S331KA

Part Overview

The Panasonic EET-HC2S331KA is a 330 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, serving general-purpose applications requiring high-voltage energy storage and filtering.

Key Parameters

Parameter	Value
Capacitance	330 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 (Maximum)	1.457" (37.00 mm)
Operating Temperature Range	-25°C to 105°C
Polarization	Polar

Substitute Part Grouping Explanation

Substitution for the EET-HC2S331KA is determined by strict equivalence across the following critical parameters:

Capacitance Value: 330 µF (exact match required)
Voltage Rating: 420 V minimum (higher voltage ratings are acceptable as upgrades)
Tolerance: ±20% (standard tolerance for this category)
Package Configuration: Radial, can snap-in format
Mounting Interface: Through-hole with 0.394" (10.00 mm) lead spacing
Physical Dimensions: 1.181" diameter (30.00 mm) with height compatibility
Polarization: Polar (unidirectional)

Direct substitutes maintain identical voltage and physical specifications. Upgrade substitutes feature higher voltage ratings (450 V) while preserving all other mechanical and electrical parameters, providing enhanced voltage margin for the same footprint.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Height (Max)	Status	RoHS
EET-HC2S331KA	Panasonic	330 µF	420 V	±20%	2000 Hrs	1.457" (37.00 mm)	Obsolete	—
420MXG330MEFCSN30X35	Rubycon	330 µF	420 V	±20%	3000 Hrs	1.457" (37.00 mm)	Active	ROHS3
420MXK330MEFC30X30	Rubycon	330 µF	420 V	±20%	3000 Hrs	1.260" (32.00 mm)	Active	ROHS3
B43504A0337M000	EPCOS - TDK Electronics	330 µF	420 V	±20%	3000 Hrs	1.850" (47.00 mm)	Active	ROHS3
EKMW421VSN331MR30S	Chemi-Con	330 µF	420 V	±20%	2000 Hrs	1.280" (32.50 mm)	Active	RoHS
LGNW6331MELB35	Nichicon	330 µF	420 V	±20%	3000 Hrs	1.457" (37.00 mm)	Active	ROHS3
LQSW6331MELB35	Nichicon	330 µF	420 V	±20%	3000 Hrs	1.457" (37.00 mm)	Active	ROHS3
450MXG330MEFCSN30X35	Rubycon	330 µF	450 V	±20%	3000 Hrs	1.457" (37.00 mm)	Active	ROHS3
450MXH330MEFC30X35	Rubycon	330 µF	450 V	±20%	2000 Hrs	1.457" (37.00 mm)	Active	ROHS3
450MXH330MEFCSN30X35	Rubycon	330 µF	450 V	±20%	2000 Hrs	1.457" (37.00 mm)	Active	ROHS3
EKMR451VSN331MR35S	Chemi-Con	330 µF	450 V	±20%	2000 Hrs	1.476" (37.50 mm)	Active	ROHS3

Engineering Selection Recommendations

Direct Substitutes (420 V Rating)

The following parts provide direct electrical and mechanical equivalence to the EET-HC2S331KA:

420MXG330MEFCSN30X35 (Rubycon MXG series): Active status with ROHS3 compliance. Identical height and lead spacing. Extended lifetime of 3000 hours at 105°C.
LQSW6331MELB35 (Nichicon LQS series): Active status with ROHS3 compliance. Identical physical footprint and height. Extended lifetime of 3000 hours at 105°C.
LGNW6331MELB35 (Nichicon LGN series): Active status with ROHS3 compliance. Identical physical footprint and height. Extended lifetime of 3000 hours at 105°C.

Height-Constrained Alternatives (420 V Rating)

For applications with reduced vertical clearance:

420MXK330MEFC30X30 (Rubycon MXK series): Reduced height of 1.260" (32.00 mm). Active status with ROHS3 compliance. Extended lifetime of 3000 hours at 105°C.
EKMW421VSN331MR30S (Chemi-Con KMW series): Reduced height of 1.280" (32.50 mm). Active status with RoHS compliance. Matched lifetime of 2000 hours at 105°C.

Extended Height Option (420 V Rating)

B43504A0337M000 (EPCOS - TDK Electronics B43504 series): Height of 1.850" (47.00 mm). Active status with ROHS3 compliance. Extended lifetime of 3000 hours at 105°C. Suitable for applications with available vertical space.

Voltage Upgrade Substitutes (450 V Rating)

For applications requiring enhanced voltage margin:

450MXG330MEFCSN30X35 (Rubycon MXG series): 450 V rating with identical physical footprint. Active status with ROHS3 compliance. Extended lifetime of 3000 hours at 105°C.
450MXH330MEFCSN30X35 (Rubycon MXH series): 450 V rating with identical physical footprint. Active status with ROHS3 compliance. Matched lifetime of 2000 hours at 105°C.
EKMR451VSN331MR35S (Chemi-Con KMR series): 450 V rating with compatible height of 1.476" (37.50 mm). Active status with ROHS3 compliance. Matched lifetime of 2000 hours at 105°C.

All recommended substitutes are currently in active production status with full regulatory compliance documentation available.

Frequently Asked Questions (FAQ)

Q: Can I use a 450 V rated capacitor in place of the 420 V EET-HC2S331KA?

A: Yes. A higher voltage rating provides additional safety margin and is electrically compatible. The 450 V substitutes (450MXG330MEFCSN30X35, 450MXH330MEFCSN30X35, EKMR451VSN331MR35S) maintain identical capacitance, tolerance, and physical dimensions while offering enhanced voltage headroom.

Q: What is the significance of the 3000-hour lifetime rating compared to the original 2000-hour rating?

A: The extended 3000-hour lifetime at 105°C indicates improved thermal stability and longer operational life under continuous stress. This is a performance enhancement with no compatibility impact. Parts with 3000-hour ratings (420MXG330MEFCSN30X35, 420MXK330MEFC30X30, LQSW6331MELB35, LGNW6331MELB35) are direct upgrades to the original 2000-hour specification.

Q: Are there height restrictions I should consider when selecting a substitute?

A: Yes. The original EET-HC2S331KA has a maximum seated height of 1.457" (37.00 mm). Direct footprint matches include 420MXG330MEFCSN30X35, LQSW6331MELB35, and LGNW6331MELB35. Reduced-height options (420MXK330MEFC30X30 at 1.260", EKMW421VSN331MR30S at 1.280") are suitable for space-constrained layouts. The B43504A0337M000 at 1.850" requires additional vertical clearance.

Q: What does ROHS3 compliance mean for my application?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. All recommended active substitutes carry ROHS3 or RoHS certification, ensuring regulatory compliance for modern manufacturing and end-use applications.

Q: Can I interchange Nichicon (LQSW6331MELB35, LGNW6331MELB35) and Rubycon (420MXG330MEFCSN30X35) parts within the same design?

A: Yes. All three parts share identical electrical specifications (330 µF, 420 V, ±20%), physical dimensions (1.181" diameter, 1.457" height, 0.394" lead spacing), and mounting interface. They are mechanically and electrically interchangeable.

Q: What is the difference between 420MXG330MEFCSN30X35 and 420MXK330MEFC30X30?

A: Both are Rubycon 330 µF, 420 V snap-in capacitors with identical electrical ratings. The primary difference is height: 420MXG330MEFCSN30X35 is 1.457" (37.00 mm), while 420MXK330MEFC30X30 is 1.260" (32.00 mm). Select based on available vertical space in your application.

Q: Is the ESR (Equivalent Series Resistance) specification critical for substitution?

A: ESR is a performance characteristic that affects ripple current handling and thermal behavior. The original EET-HC2S331KA specifies 553 mOhm @ 120 Hz. While substitute parts may have different ESR values, all recommended parts are rated for the same general-purpose applications and ripple current requirements. Verify ESR specifications if your application has strict ripple current or thermal constraints.

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