337KXM035M Equivalent & Substitute Parts Reference

Part Overview

The 337KXM035M is a 330 µF, 35 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the KXM series. This radial, through-hole component is designed for general-purpose applications with a rated lifetime of 4000 hours at 105°C. The part is currently active in production and ROHS3 compliant. Substitute parts are identified to address inventory availability, extended operational lifetime requirements, or enhanced electrical performance characteristics within the same electrical and mechanical specifications.

Key Parameters

Parameter	Specification
Capacitance	330 µF
Voltage Rating	35 V
Tolerance	±20%
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)
Operating Temperature Range	-55°C to 105°C
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 337KXM035M is determined by strict equivalence across the following parameters:

Mandatory Equivalence Criteria:

Capacitance: 330 µF (exact match required)
Voltage Rating: 35 V (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can (exact match required)
Mounting Type: Through Hole (exact match required)
Lead Spacing: 0.197" (5.00 mm) (exact match required)
Case Diameter: 0.394" (10.00 mm) (exact match required)
Operating Temperature Range: -55°C to 105°C (exact match required)
Polarization: Polar (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)

Performance Parameters (Secondary Considerations):

ESR (Equivalent Series Resistance)
Lifetime at 105°C
Ripple Current ratings
Impedance

All three identified substitute parts meet the mandatory equivalence criteria. Differences in ESR, lifetime, and ripple current represent performance enhancements or variations suitable for specific application requirements.

Parameter Comparison

Parameter	337KXM035M (Cornell Dubilier)	B41858C7337M000 (EPCOS - TDK)	B41888C7337M000 (EPCOS - TDK)	ELXZ350ELL331MJ16S (Chemi-Con)
Capacitance	330 µF	330 µF	330 µF	330 µF
Voltage Rating	35 V	35 V	35 V	35 V
Tolerance	±20%	±20%	±20%	±20%
ESR @ Specified Frequency	602.9 mOhm @ 120 Hz	118 mOhm @ 10 kHz	64 mOhm @ 10 kHz	Not specified
Lifetime @ 105°C	4000 Hrs	5000 Hrs	7000 Hrs	5000 Hrs
Operating Temperature	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C
Lead Spacing	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Height (Max)	0.689" (17.50 mm)	0.669" (17.00 mm)	0.669" (17.00 mm)	0.689" (17.50 mm)
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

B41858C7337M000 (EPCOS - TDK Electronics)

This substitute offers improved ESR performance (118 mOhm @ 10 kHz versus 602.9 mOhm @ 120 Hz) and extended lifetime (5000 hours versus 4000 hours at 105°C). The part is ROHS3 compliant and rated for automotive applications. Height is reduced by 0.020" (0.50 mm), which may provide board layout advantages in space-constrained designs. Suitable for applications requiring enhanced electrical performance within the same form factor.

B41888C7337M000 (EPCOS - TDK Electronics)

This substitute provides the lowest ESR (64 mOhm @ 10 kHz) and longest operational lifetime (7000 hours at 105°C) among all options. The part carries AEC-Q200 automotive qualification and ROHS3 compliance. Height is reduced by 0.020" (0.50 mm). This option is appropriate for high-reliability applications or designs requiring extended service life and superior ripple current handling (1.24 A @ 100 kHz).

ELXZ350ELL331MJ16S (Chemi-Con)

This substitute maintains the original height specification (0.689" / 17.50 mm) and offers 5000-hour lifetime at 105°C. The part carries AEC-Q200 automotive qualification and ROHS3 compliance. Impedance is specified at 68 mOhms. This option is suitable for applications requiring automotive-grade reliability with dimensional compatibility to the original part.

All three substitutes are electrically and mechanically compatible with the 337KXM035M and maintain full compliance with applicable regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can B41858C7337M000 or B41888C7337M000 be used as direct replacements for 337KXM035M in existing PCB designs?

A: Yes. Both parts are mechanically compatible with identical lead spacing (0.197" / 5.00 mm) and case diameter (0.394" / 10.00 mm). Both are 0.020" (0.50 mm) shorter in height, which does not affect through-hole mounting compatibility. Electrical parameters (capacitance, voltage rating, tolerance) are identical.

Q: What is the difference between the two EPCOS substitutes?

A: B41888C7337M000 provides superior performance with lower ESR (64 mOhm versus 118 mOhm) and extended lifetime (7000 hours versus 5000 hours at 105°C). B41888C7337M000 also carries AEC-Q200 automotive qualification. B41858C7337M000 is suitable for general applications requiring improved performance over the original part.

Q: Why does ELXZ350ELL331MJ16S maintain the original height while the EPCOS parts are shorter?

A: Height variation reflects different internal construction and materials used by each manufacturer. All three parts meet the specified electrical and mechanical requirements. Height differences do not affect functional compatibility in through-hole applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All three substitute parts (B41858C7337M000, B41888C7337M000, and ELXZ350ELL331MJ16S) are ROHS3 compliant, matching the compliance status of the original 337KXM035M.

Q: Which substitute should be selected for automotive applications?

A: Both B41888C7337M000 and ELXZ350ELL331MJ16S carry automotive ratings (AEC-Q200). B41858C7337M000 is rated for automotive applications but does not carry AEC-Q200 qualification. Selection depends on specific automotive qualification requirements for the end application.

Q: What is the significance of ESR differences between parts?

A: ESR (Equivalent Series Resistance) affects ripple current handling and heat generation. Lower ESR values indicate better high-frequency performance. B41888C7337M000 (64 mOhm) provides superior ripple current capacity (1.24 A @ 100 kHz) compared to the original part (1.43 A @ 100 kHz specification differs due to measurement frequency differences). ESR differences are relevant only in applications with significant AC ripple current.

Q: Can the original 337KXM035M be substituted with ELXZ350ELL331MJ16S in reverse?

A: Yes. All parts meet identical mandatory equivalence criteria. The original 337KXM035M can be used as a substitute for ELXZ350ELL331MJ16S in applications where the 4000-hour lifetime and general-purpose rating are acceptable.

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