ESMM451VSN331MQ50T Equivalent & Substitute Parts Reference

Part Overview

The ESMM451VSN331MQ50T is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by Chemi-Con in the SMM series. This component is designed for general-purpose applications requiring radial, can-style snap-in mounting with through-hole configuration. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	450 V
Tolerance	±20%
ESR @ 120Hz	1.005 Ohm
Lifetime @ Temperature	3000 Hrs @ 85°C
Operating Temperature Range	-25°C ~ 85°C
Ripple Current @ 120 Hz	2.12 A
Ripple Current @ 100 kHz	3.0316 A
Lead Spacing	0.394" (10.00 mm)
Diameter	1.000" (25.40 mm)
Height (Seated Max)	2.047" (52.00 mm)
Mounting Type	Through Hole
Package/Case	Radial, Can - Snap-In
Polarization	Polar
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution of the ESMM451VSN331MQ50T is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 450 V (exact match required)
Tolerance: ±20% (exact match required)
Mounting Type: Through Hole (exact match required)
Package/Case: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Polarization: Polar (exact match required)

Compatible Variation Parameters:

ESR: Equivalent or lower values acceptable
Lifetime @ Temperature: Equal or extended values acceptable
Operating Temperature Range: Equal or extended ranges acceptable
Ripple Current: Equal or higher values acceptable
Physical Dimensions (Diameter, Height): Minor variations within mechanical compatibility acceptable
RoHS/REACH Compliance: Equal or higher compliance levels acceptable

Substitute parts are grouped into three categories: Direct Manufacturer Equivalents (identical electrical and mechanical specifications), Upgrade Equivalents (enhanced performance characteristics), and Parametric Equivalents (functionally compatible with allowable parameter variations).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR @ Test Freq	Lifetime @ Temp	Operating Temp Range	Lead Spacing	Diameter	Height (Max)	Product Status
ESMM451VSN331MQ50T	Chemi-Con	330 µF	450 V	±20%	1.005 Ω @ 120Hz	3000 Hrs @ 85°C	-25°C ~ 85°C	0.394" (10.00 mm)	1.000" (25.40 mm)	2.047" (52.00 mm)	Obsolete
ESMM451VSN331MQ50U	Chemi-Con	330 µF	450 V	±20%	1.005 Ω @ 120Hz	3000 Hrs @ 85°C	-25°C ~ 85°C	0.394" (10.00 mm)	1.000" (25.40 mm)	2.047" (52.00 mm)	Active
ESMM451VSN331MQ50S	Chemi-Con	330 µF	450 V	±20%	1.005 Ω @ 120Hz	3000 Hrs @ 85°C	-25°C ~ 85°C	0.394" (10.00 mm)	1.000" (25.40 mm)	2.047" (52.00 mm)	Active
ESMM451VNN331MQ50U	Chemi-Con	330 µF	450 V	±20%	1.005 Ω @ 120Hz	3000 Hrs @ 85°C	-25°C ~ 85°C	0.394" (10.00 mm)	1.000" (25.40 mm)	2.047" (52.00 mm)	Active
ELHS451VSN331MQ50S	Chemi-Con	330 µF	450 V	±20%	Not Specified	5000 Hrs @ 105°C	-40°C ~ 105°C	0.394" (10.00 mm)	1.000" (25.40 mm)	2.067" (52.50 mm)	Active
B43601A5337M	EPCOS - TDK Electronics	330 µF	450 V	±20%	330 mΩ @ 100Hz	10000 Hrs @ 85°C	-40°C ~ 85°C	0.394" (10.00 mm)	0.984" (25.00 mm)	2.047" (52.00 mm)	Active
B43601A5337M60	EPCOS - TDK Electronics	330 µF	450 V	±20%	330 mΩ @ 100Hz	10000 Hrs @ 85°C	-40°C ~ 85°C	0.394" (10.00 mm)	0.984" (25.00 mm)	2.047" (52.00 mm)	Active
B43601A5337M67	EPCOS - TDK Electronics	330 µF	450 V	±20%	330 mΩ @ 100Hz	10000 Hrs @ 85°C	-40°C ~ 85°C	0.394" (10.00 mm)	0.984" (25.00 mm)	2.047" (52.00 mm)	Active
B43601A5337M80	EPCOS - TDK Electronics	330 µF	450 V	±20%	330 mΩ @ 100Hz	10000 Hrs @ 85°C	-40°C ~ 85°C	0.394" (10.00 mm)	0.984" (25.00 mm)	2.055" (52.20 mm)	Active
B43601A5337M87	EPCOS - TDK Electronics	330 µF	450 V	±20%	330 mΩ @ 100Hz	10000 Hrs @ 85°C	-40°C ~ 85°C	0.394" (10.00 mm)	0.984" (25.00 mm)	2.055" (52.20 mm)	Active
450MXG330MEFCSN25X50	Rubycon	330 µF	450 V	±20%	Not Specified	3000 Hrs @ 105°C	-25°C ~ 105°C	0.394" (10.00 mm)	0.984" (25.00 mm)	2.047" (52.00 mm)	Active

Engineering Selection Recommendations

Direct Manufacturer Equivalents (Chemi-Con SMM Series):

ESMM451VSN331MQ50U and ESMM451VSN331MQ50S are direct electrical and mechanical equivalents to the obsolete ESMM451VSN331MQ50T. Both parts maintain identical capacitance, voltage rating, tolerance, ESR characteristics, and physical dimensions. Both are currently in active production status with RoHS compliance. ESMM451VSN331MQ50U and ESMM451VSN331MQ50S differ only in packaging designation and are functionally interchangeable for the original application.

Upgrade Equivalent (Chemi-Con LHS Series):

ELHS451VSN331MQ50S represents an upgrade option within the Chemi-Con product line. This part maintains all mandatory electrical parameters (330 µF, 450 V, ±20% tolerance) and mechanical compatibility (lead spacing, mounting type, snap-in package). The ELHS series provides extended lifetime (5000 Hrs @ 105°C versus 3000 Hrs @ 85°C) and expanded operating temperature range (-40°C ~ 105°C versus -25°C ~ 85°C). Physical height increases marginally from 2.047" to 2.067", which remains compatible with standard through-hole PCB layouts. Active production status and RoHS compliance are confirmed.

Alternative Manufacturer Equivalents (EPCOS - TDK Electronics B43601 Series):

The B43601A5337M family (including variants M, M60, M67, M80, M87) from EPCOS - TDK Electronics provides parametric equivalence with enhanced performance characteristics. All variants maintain 330 µF capacitance, 450 V rating, and ±20% tolerance. ESR is reduced to 330 mΩ @ 100Hz (compared to 1.005 Ω @ 120Hz in the original), and lifetime is extended to 10000 Hrs @ 85°C. Operating temperature range expands to -40°C ~ 85°C. Diameter is slightly reduced to 0.984" (25.00 mm) from 1.000" (25.40 mm), and height remains at 2.047" or 2.055" depending on variant. All variants are ROHS3 compliant and in active production.

Alternative Manufacturer Upgrade (Rubycon MXG Series):

450MXG330MEFCSN25X50 from Rubycon provides parametric equivalence with performance enhancements. Capacitance, voltage, and tolerance match exactly. Operating temperature range extends to -25°C ~ 105°C with 3000 Hrs @ 105°C lifetime rating. Diameter is 0.984" (25.00 mm) and height is 2.047" (52.00 mm). ROHS3 compliance and active production status are confirmed. This part is available in high inventory quantities.

Selection Criteria:

For direct replacement requiring no design modification, select ESMM451VSN331MQ50U or ESMM451VSN331MQ50S from Chemi-Con. For applications requiring extended temperature range or lifetime, select ELHS451VSN331MQ50S. For applications benefiting from reduced ESR and extended lifetime with alternative manufacturer sourcing, select from the EPCOS B43601A5337M family. For high-volume applications with extended temperature capability, select 450MXG330MEFCSN25X50 from Rubycon.

Frequently Asked Questions (FAQ)

Q: Can ESMM451VSN331MQ50U directly replace the obsolete ESMM451VSN331MQ50T?

A: Yes. ESMM451VSN331MQ50U is a direct equivalent with identical electrical specifications (330 µF, 450 V, 1.005 Ω ESR @ 120Hz, 3000 Hrs @ 85°C) and mechanical dimensions (lead spacing 0.394", diameter 1.000", height 2.047"). The part is in active production with RoHS compliance.

Q: What is the difference between ESMM451VSN331MQ50S and ESMM451VSN331MQ50U?

A: Both parts are electrically and mechanically identical. The difference is packaging designation only. ESMM451VSN331MQ50S is supplied in bulk packaging, while ESMM451VSN331MQ50U uses standard packaging. Functional performance is equivalent.

Q: Is ELHS451VSN331MQ50S compatible with the original ESMM451VSN331MQ50T application?

A: ELHS451VSN331MQ50S is mechanically and electrically compatible for most applications. All mandatory parameters match (330 µF, 450 V, ±20%, lead spacing 0.394", snap-in package). Physical height increases from 2.047" to 2.067", which is typically accommodated in standard PCB layouts. The part offers extended lifetime (5000 Hrs @ 105°C) and wider operating temperature range (-40°C ~ 105°C).

Q: Can EPCOS B43601A5337M series parts replace the Chemi-Con ESMM451VSN331MQ50T?

A: Yes, with design considerations. All B43601 variants maintain mandatory electrical parameters (330 µF, 450 V, ±20%, lead spacing 0.394"). Physical diameter is reduced from 1.000" to 0.984", which may require PCB layout verification. ESR is improved (330 mΩ @ 100Hz), and lifetime is extended (10000 Hrs @ 85°C). These parts are ROHS3 compliant and in active production.

Q: What are the key differences between Chemi-Con and EPCOS alternatives?

A: Chemi-Con SMM/LHS series maintains original diameter (1.000") with ESR of 1.005 Ω. EPCOS B43601 series reduces diameter to 0.984" with improved ESR of 330 mΩ. EPCOS provides extended lifetime (10000 Hrs @ 85°C). Both manufacturers offer RoHS compliance and active production status.

Q: Is the Rubycon 450MXG330MEFCSN25X50 suitable for high-temperature applications?

A: Yes. The Rubycon part operates across -25°C ~ 105°C with 3000 Hrs @ 105°C lifetime rating. This exceeds the original part's -25°C ~ 85°C range and 3000 Hrs @ 85°C rating. Physical dimensions (0.984" diameter, 2.047" height) are compatible with standard through-hole layouts.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are RoHS compliant (RoHS or ROHS3 status confirmed). The original ESMM451VSN331MQ50T is RoHS compliant. All alternatives maintain or exceed this compliance level.

Q: What is the inventory status of substitute parts?

A: ESMM451VSN331MQ50U (843 pcs), ESMM451VSN331MQ50S (1269 pcs), and ESMM451VNN331MQ50U (1020 pcs) are available from Chemi-Con. ELHS451VSN331MQ50S (696 pcs) is available. EPCOS B43601 variants range from 648 to 941 pcs. Rubycon 450MXG330MEFCSN25X50 has the highest availability at 273,782 pcs.

Q: Can I use multiple substitute parts interchangeably in the same design?

A: Substitutes within the same manufacturer (Chemi-Con SMM variants) are fully interchangeable. Cross-manufacturer substitution (Chemi-Con to EPCOS or Rubycon) requires PCB layout verification due to minor diameter variations (1.000" vs 0.984"). Height variations are minimal and typically accommodated in standard designs.

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