ESMH451VSN221MR40S Equivalent & Substitute Parts

Part Overview

The ESMH451VSN221MR40S is a 220 µF, 450 V aluminum electrolytic capacitor manufactured by Chemi-Con in the SMH series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high voltage energy storage and filtering. The part is currently Active in product status with 669 units in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand enhanced performance characteristics such as extended lifetime or improved thermal ratings, or when alternative manufacturers' components meet the same electrical and mechanical specifications for cost optimization or supply chain diversification.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	220	µF	Critical - must match exactly
Voltage Rating	450	V	Critical - minimum acceptable rating
Tolerance	±20%	%	Critical - must match or be tighter
Package Type	Radial, Can - Snap-In	-	Critical - mechanical compatibility
Lead Spacing	0.394" (10.00 mm)	in (mm)	Critical - PCB footprint compatibility
Mounting Type	Through Hole	-	Critical - assembly method
Operating Temperature Range	-25°C ~ 85°C	°C	Important - thermal environment compatibility
Polarization	Polar	-	Critical - polarity requirement
Lifetime @ Temperature	2000 Hrs @ 85°C	Hrs @ °C	Important - reliability and service life
ESR @ 120 Hz	1.13	Ohm	Important - electrical performance
Ripple Current @ 120 Hz	1.55	A	Important - thermal stress capability
RoHS Status	ROHS3 Compliant	-	Important - regulatory compliance

Substitute Part Grouping Explanation

Substitute parts for the ESMH451VSN221MR40S are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Same Electrical Rating - 450 V, 220 µF): Direct substitutes maintain identical capacitance and voltage ratings. These parts are interchangeable when the primary design parameters are met. Substitution is determined by matching: capacitance (220 µF), voltage rating (450 V), tolerance (±20%), package type (Radial, Can - Snap-In), lead spacing (10.00 mm), and mounting type (Through Hole). Variations in ESR, ripple current capability, lifetime ratings, and operating temperature ranges are acceptable provided they meet or exceed the application requirements.

Upgrade Substitutes (Higher Voltage or Extended Lifetime): Upgrade substitutes provide enhanced performance through higher voltage ratings (500 V) or extended lifetime ratings (5000 Hrs @ 105°C vs. 2000 Hrs @ 85°C). These parts are electrically compatible as they maintain the same capacitance and tolerance while offering superior reliability margins. Upgrade substitutes are suitable when design margins require improved thermal performance or higher voltage headroom.

Substitution Criteria (Mandatory Matching Parameters):

Capacitance: 220 µF (exact match required)
Voltage Rating: 450 V minimum (higher ratings acceptable)
Tolerance: ±20% (tighter tolerances acceptable)
Package: Radial, Can - Snap-In (exact match required)
Lead Spacing: 10.00 mm (exact match required)
Mounting: Through Hole (exact match required)
Polarization: Polar (exact match required)

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance (%)	ESR @ Frequency	Lifetime @ Temp	Operating Temp (°C)	Height (mm)	Product Status	RoHS	Stock (Pcs)
ESMH451VSN221MR40S	Chemi-Con	SMH	220	450	±20	1.13 Ω @ 120 Hz	2000 Hrs @ 85°C	-25 ~ 85	42.00	Active	ROHS3	669
ESMQ451VSN221MR30S	Chemi-Con	SMQ	220	450	±20	Not specified	2000 Hrs @ 85°C	-25 ~ 85	30.00	Active	RoHS	917
ESMR451VSN221MR25S	Chemi-Con	SMR	220	450	±20	Not specified	2000 Hrs @ 85°C	-25 ~ 85	27.50	Active	RoHS	1121
ELHS501VSN221MR40S	Chemi-Con	LHS	220	500	±20	Not specified	5000 Hrs @ 105°C	-40 ~ 105	42.50	Active	RoHS	1182
B43504B5227M000	EPCOS - TDK	B43504	220	450	±20	610 mΩ @ 100 Hz	3000 Hrs @ 105°C	-40 ~ 105	42.00	Not For New Designs	ROHS3	849
B43509B5227M060	EPCOS - TDK	B43509	220	450	±20	450 mΩ @ 100 Hz	3000 Hrs @ 105°C	-40 ~ 105	42.00	Active	ROHS3	1292
LLS2W221MELB	Nichicon	LLS	220	450	±20	Not specified	3000 Hrs @ 85°C	-25 ~ 85	30.00	Active	ROHS3	1743
MAL215947221E3	Vishay Beyschlag	159 PUL-SI	220	450	±20	740 mΩ @ 100 Hz	5000 Hrs @ 105°C	-25 ~ 105	42.00	Active	ROHS3	1900
381LX221M450K042	Cornell Dubilier	381LX	220	450	±20	Not specified	3000 Hrs @ 105°C	-25 ~ 105	42.00	Active	ROHS3	1030
B43252B5227M000	EPCOS - TDK	B43252	220	450	±20	Not specified	2000 Hrs @ 105°C	-25 ~ 105	42.00	Active	ROHS3	842
B43509B5227M000	EPCOS - TDK	B43509	220	450	±20	450 mΩ @ 100 Hz	3000 Hrs @ 105°C	-40 ~ 105	42.00	Active	ROHS3	1015

Engineering Selection Recommendations

For Direct Replacement (Same Performance Envelope):

Select ESMQ451VSN221MR30S or ESMR451VSN221MR25S when the primary ESMH451VSN221MR40S is unavailable. Both parts are manufactured by Chemi-Con, maintain identical electrical specifications (220 µF, 450 V, ±20%), and are Active in product status. The ESMQ451VSN221MR30S offers reduced height (30.00 mm vs. 42.00 mm), while ESMR451VSN221MR25S provides the most compact form factor (27.50 mm height). Both are suitable for applications where the original 42.00 mm height is not a constraint.

For Enhanced Reliability (Extended Lifetime):

Select MAL215947221E3 (Vishay Beyschlag) or ELHS501VSN221MR40S (Chemi-Con) when extended service life is required. MAL215947221E3 provides 5000 Hrs @ 105°C lifetime with identical 450 V rating and maintains the original 42.00 mm height. ELHS501VSN221MR40S offers 5000 Hrs @ 105°C with upgraded 500 V rating, providing additional voltage margin. Both parts are Active and ROHS3 compliant.

For Improved Thermal Performance:

Select B43509B5227M060 or B43509B5227M000 (EPCOS - TDK) when lower ESR and improved ripple current handling are required. B43509B5227M060 features 450 mΩ ESR @ 100 Hz with 3000 Hrs @ 105°C lifetime and extended operating temperature range (-40°C ~ 105°C). B43509B5227M000 provides identical electrical performance with 3000 Hrs @ 105°C. Both are Active and ROHS3 compliant.

For Cost-Optimized Selection:

Select LLS2W221MELB (Nichicon) when cost reduction is prioritized without sacrificing compliance. This part maintains 220 µF, 450 V specifications with 3000 Hrs @ 85°C lifetime and is available in high stock quantity (1743 units). It is Active and ROHS3 compliant.

Avoid Selection:

B43504B5227M000 is marked "Not For New Designs" and should not be selected for new applications despite meeting electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can ESMQ451VSN221MR30S replace ESMH451VSN221MR40S directly on the PCB?

A: ESMQ451VSN221MR30S is electrically equivalent but has a reduced height of 30.00 mm compared to the original 42.00 mm. It maintains identical lead spacing (10.00 mm), capacitance (220 µF), voltage (450 V), and mounting type (Through Hole, Radial, Can - Snap-In). Direct PCB replacement is possible if the reduced height does not conflict with board layout or component clearance requirements.

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

A: Direct substitutes maintain the same 450 V voltage rating and 2000 Hrs @ 85°C lifetime as the original part. Upgrade substitutes provide either higher voltage ratings (500 V) or extended lifetime ratings (5000 Hrs @ 105°C or 3000 Hrs @ 105°C). Upgrade substitutes are backward compatible and suitable for applications requiring improved reliability margins.

Q: Is ELHS501VSN221MR40S compatible with the original design?

A: ELHS501VSN221MR40S is electrically compatible as a direct replacement. It maintains identical capacitance (220 µF), tolerance (±20%), lead spacing (10.00 mm), and mounting type. The upgraded 500 V rating provides additional voltage headroom. Height is 42.50 mm (0.50 mm taller than original), which is negligible for most applications. Operating temperature range extends to 105°C, and lifetime is extended to 5000 Hrs @ 105°C.

Q: Why do some substitute parts have different ESR values?

A: ESR (Equivalent Series Resistance) varies by manufacturer design and series. Lower ESR values (such as 450 mΩ in B43509 series vs. 1.13 Ω in ESMH series) indicate improved electrical performance and lower heat generation under ripple current stress. All listed substitutes meet the electrical requirements for the application; ESR differences reflect design trade-offs between cost, size, and performance.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts are RoHS compliant. The original ESMH451VSN221MR40S is ROHS3 compliant. Direct substitutes from Chemi-Con (ESMQ, ESMR series) and Nichicon (LLS series) are RoHS compliant. EPCOS - TDK parts (B43504, B43509, B43252 series) and Vishay Beyschlag (MAL series) are ROHS3 compliant. Cornell Dubilier (381LX series) is ROHS3 compliant. All parts are REACH unaffected.

Q: Can I use a 500 V rated capacitor in place of a 450 V rated capacitor?

A: Yes. A higher voltage rating (500 V) is acceptable as a direct replacement for a 450 V rated capacitor. The 500 V rated part (ELHS501VSN221MR40S) provides additional voltage margin and is suitable for the same application. This is considered an upgrade substitution and does not compromise circuit functionality.

Q: What is the significance of the operating temperature range difference?

A: The original ESMH451VSN221MR40S operates from -25°C to 85°C. Some substitutes extend this range to -40°C to 105°C (B43509 series, MAL215947221E3). Extended temperature range indicates improved thermal stability and is beneficial for applications in harsh environments. If the application operates within the original -25°C to 85°C range, both original and extended-range substitutes are suitable.

Q: Which substitute offers the best overall performance?

A: MAL215947221E3 (Vishay Beyschlag) and ELHS501VSN221MR40S (Chemi-Con) offer the best overall performance. Both provide 5000 Hrs @ 105°C lifetime (2.5× longer than the original), extended operating temperature range, and are Active in product status with ROHS3 compliance. MAL215947221E3 maintains the original 450 V rating, while ELHS501VSN221MR40S provides upgraded 500 V rating. Selection depends on whether voltage margin or cost is prioritized.

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