ELXM421VSN331MR50S Equivalent & Substitute Parts

Part Overview

The ELXM421VSN331MR50S is a 330 µF, 420 V aluminum electrolytic capacitor manufactured by Chemi-Con in the LXM series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring through-hole mounting. The component is currently active in production with RoHS compliance and unlimited moisture sensitivity rating. Substitute parts are identified when the original component becomes unavailable, when design requirements change, or when alternative specifications better match application needs while maintaining functional compatibility.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Tolerance	±20%	—
Voltage - Rated	420	V
Lifetime @ Temperature	7000	Hrs @ 105°C
Operating Temperature Range	-25 to 105	°C
Lead Spacing	10.00	mm
Diameter	30.00	mm
Height - Seated (Max)	52.00	mm
Mounting Type	Through Hole	—
Package / Case	Radial, Can - Snap-In	—
RoHS Status	Compliant	—

Substitute Part Grouping Explanation

Substitution of the ELXM421VSN331MR50S is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Capacitance value: 330 µF (fixed requirement)
Tolerance: ±20% (fixed requirement)
Mounting type: Through Hole (fixed requirement)
Package style: Radial, Can - Snap-In (fixed requirement)
Lead spacing: 10.00 mm (fixed requirement)
Physical dimensions: 30.00 mm diameter, 52.00 mm height maximum (fixed requirement)
Polarization: Polar (fixed requirement)

Allowable Variation Parameters:

Voltage rating: May be equal to or greater than 420 V
Lifetime @ 105°C: May be equal to or greater than 7000 hours
Ripple current specifications: May vary within application tolerance
Series designation: May differ (LXM vs. TXH)

The ETXH451VSN331MR50S qualifies as a substitute because it maintains all mandatory compatibility criteria while offering improved voltage rating (450 V) and extended lifetime (10000 Hrs @ 105°C).

Parameter Comparison

Parameter	ELXM421VSN331MR50S (Main)	ETXH451VSN331MR50S (Substitute)	Compatibility
Manufacturer	Chemi-Con	Chemi-Con	Same
Capacitance	330 µF	330 µF	Identical
Tolerance	±20%	±20%	Identical
Voltage - Rated	420 V	450 V	Substitute rated higher
Lifetime @ 105°C	7000 Hrs	10000 Hrs	Substitute rated longer
Operating Temperature	-25 to 105°C	-25 to 105°C	Identical
Lead Spacing	10.00 mm	10.00 mm	Identical
Diameter	30.00 mm	30.00 mm	Identical
Height - Seated (Max)	52.00 mm	52.00 mm	Identical
Mounting Type	Through Hole	Through Hole	Identical
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Identical
RoHS Status	Compliant	Compliant	Both compliant
Ripple Current @ 120 Hz	1.56 A	1.33 A	Substitute lower
Ripple Current @ 50 kHz	2.2308 A	1.9019 A	Substitute lower

Engineering Selection Recommendations

ELXM421VSN331MR50S (Main Part): Select this component when the original specification calls for 420 V rated voltage and 7000-hour lifetime at 105°C. This part is active in production with full RoHS compliance and unlimited moisture sensitivity rating (MSL 1). Use when design margins and application requirements specifically match these parameters.

ETXH451VSN331MR50S (Substitute Part): Select this component as a direct substitute when the ELXM421VSN331MR50S is unavailable. The ETXH451VSN331MR50S provides enhanced reliability through higher voltage rating (450 V) and extended lifetime (10000 Hrs @ 105°C). Both components share identical physical dimensions, lead spacing, and mounting configuration, ensuring PCB compatibility without layout modification. Both parts are RoHS compliant and carry MSL 1 rating. The substitute is suitable for applications where improved voltage margin and extended operational life provide system benefits.

Frequently Asked Questions (FAQ)

Q: Can the ETXH451VSN331MR50S be used as a direct replacement for the ELXM421VSN331MR50S on existing PCBs?

A: Yes. Both components have identical lead spacing (10.00 mm), diameter (30.00 mm), height (52.00 mm), and mounting type (through-hole, radial snap-in). No PCB modification is required for physical installation.

Q: What is the difference in voltage rating between these two parts?

A: The ELXM421VSN331MR50S is rated at 420 V, while the ETXH451VSN331MR50S is rated at 450 V. The substitute provides 30 V additional voltage margin. Both are suitable for circuits operating at or below 420 V.

Q: Are the capacitance values identical?

A: Yes. Both parts are 330 µF with ±20% tolerance. Capacitance value is not a differentiating factor between these components.

Q: How do the lifetime specifications compare?

A: The ELXM421VSN331MR50S is rated for 7000 hours at 105°C. The ETXH451VSN331MR50S is rated for 10000 hours at 105°C, providing 3000 additional hours of operational life under the same thermal conditions.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. Both the ELXM421VSN331MR50S and ETXH451VSN331MR50S are RoHS compliant. Both carry MSL 1 (unlimited moisture sensitivity) rating.

Q: What is the significance of the different series designations (LXM vs. TXH)?

A: Series designation indicates the internal design and construction of the capacitor. The LXM series (main part) and TXH series (substitute) are different product lines from Chemi-Con. Despite different series names, both meet the specified electrical and mechanical parameters for substitution.

Q: Are there any ripple current differences I should consider?

A: The ETXH451VSN331MR50S has lower ripple current ratings than the ELXM421VSN331MR50S at both 120 Hz (1.33 A vs. 1.56 A) and 50 kHz (1.9019 A vs. 2.2308 A). Verify that application ripple current requirements do not exceed the substitute part's specifications.

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