KMG35VB331M10X12LL Equivalent & Substitute Parts

Part Overview

The KMG35VB331M10X12LL is a 330 µF, 35 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KMG series. This radial, through-hole component is designed for general-purpose applications with a rated lifetime of 1000 hours at 105°C. The part is currently classified as obsolete, necessitating identification of equivalent and substitute components for ongoing production support and design continuity.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	35 V
Tolerance	±20%
ESR @ 120 Hz	703 mOhm
Lifetime @ 105°C	1000 Hrs
Operating Temperature Range	-55°C to 105°C
Ripple Current @ 120 Hz	350 mA
Ripple Current @ 100 kHz	525 mA
Lead Spacing	0.197" (5.00 mm)
Diameter	0.394" (10.00 mm)
Height (Seated Max)	0.492" (12.50 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
Polarization	Polar

Substitute Part Grouping Explanation

Substitution of the KMG35VB331M10X12LL is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 330 µF
Voltage Rating: 35 V
Tolerance: ±20%
Lead Spacing: 0.197" (5.00 mm)
Diameter: 0.394" (10.00 mm)
Mounting Type: Through Hole
Package Type: Radial, Can
Polarization: Polar
Operating Temperature Range: -55°C to 105°C
Ripple Current @ 120 Hz: 350 mA
Ripple Current @ 100 kHz: 525 mA

Allowable Variations:

Height (Seated Max): Up to 0.551" (14.00 mm) permitted if PCB layout accommodates
Lifetime @ 105°C: Equal to or greater than 1000 hours
ESR: Not specified as a constraint; manufacturer variations acceptable
RoHS Compliance: Preferred but not mandatory for direct substitution

Three substitute parts meet these criteria and are grouped as follows:

Group 1 - Same Manufacturer, Active Status: EKMG350ELL331MJC5S (Chemi-Con KMG series, Active product status)

Group 2 - Cross-Manufacturer, Direct Equivalent: UKT1V331MPD (Nichicon UKT series, Not For New Designs status)

Group 3 - Cross-Manufacturer, Enhanced Lifetime: UVZ1V331MPD (Nichicon UVZ series, Not For New Designs status, 2000 Hrs @ 105°C)

Parameter Comparison

Parameter	KMG35VB331M10X12LL	EKMG350ELL331MJC5S	UKT1V331MPD	UVZ1V331MPD
Manufacturer	Chemi-Con	Chemi-Con	Nichicon	Nichicon
Series	KMG	KMG	UKT	UVZ
Capacitance	330 µF	330 µF	330 µF	330 µF
Voltage Rating	35 V	35 V	35 V	35 V
Tolerance	±20%	±20%	±20%	±20%
Lifetime @ 105°C	1000 Hrs	1000 Hrs	1000 Hrs	2000 Hrs
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Ripple Current @ 120 Hz	350 mA	350 mA	350 mA	350 mA
Ripple Current @ 100 kHz	525 mA	525 mA	Not Specified	Not Specified
Lead Spacing	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Diameter	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Height (Seated Max)	0.492" (12.50 mm)	0.551" (14.00 mm)	0.492" (12.50 mm)	0.492" (12.50 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Product Status	Obsolete	Active	Not For New Designs	Not For New Designs
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: EKMG350ELL331MJC5S

The EKMG350ELL331MJC5S is the preferred substitute for the obsolete KMG35VB331M10X12LL. Both components are manufactured by Chemi-Con within the KMG series, ensuring design continuity and manufacturing consistency. The EKMG350ELL331MJC5S maintains active product status, guaranteeing long-term availability and supply chain stability. This part is ROHS3 compliant, meeting current regulatory requirements. The only dimensional difference is a maximum seated height of 0.551" (14.00 mm) compared to 0.492" (12.50 mm) in the original part; PCB layout must accommodate this 0.059" (1.50 mm) increase.

Secondary Recommendation: UVZ1V331MPD

The UVZ1V331MPD from Nichicon provides a cross-manufacturer equivalent with enhanced reliability. This part doubles the lifetime specification to 2000 hours at 105°C, offering superior performance in thermally demanding applications. The UVZ1V331MPD maintains identical mechanical dimensions and electrical ratings to the original part, requiring no PCB layout modifications. ROHS3 compliance is confirmed. The "Not For New Designs" status indicates this is a mature, stable product suitable for legacy system support and replacement applications.

Tertiary Option: UKT1V331MPD

The UKT1V331MPD from Nichicon serves as a direct dimensional and electrical equivalent with identical seated height of 0.492" (12.50 mm). This part is suitable for applications where height constraints are critical. The "Not For New Designs" status applies; use this option only when the other substitutes are unavailable or when specific application requirements mandate the UKT series characteristics.

Frequently Asked Questions (FAQ)

Q: Can EKMG350ELL331MJC5S be used as a direct drop-in replacement for KMG35VB331M10X12LL?

A: The EKMG350ELL331MJC5S is electrically and functionally equivalent. The seated height increases from 0.492" to 0.551" (maximum). Verify that the PCB layout and component clearances accommodate this 1.50 mm height increase. If height is constrained, use UKT1V331MPD or UVZ1V331MPD instead.

Q: What is the significance of the "Not For New Designs" status on Nichicon parts?

A: This designation indicates the product is mature and stable but not recommended for new circuit designs. These parts remain suitable for replacement, repair, and legacy system support. Inventory availability is typically robust for such products.

Q: Are all three substitute parts RoHS compliant?

A: Yes. EKMG350ELL331MJC5S, UKT1V331MPD, and UVZ1V331MPD all carry ROHS3 compliance certification, meeting current environmental and regulatory standards.

Q: Does the UVZ1V331MPD's extended lifetime (2000 Hrs vs. 1000 Hrs) affect electrical performance?

A: No. The extended lifetime specification indicates superior capacitor construction and materials. Electrical parameters—capacitance, voltage rating, tolerance, ripple current, and operating temperature range—remain identical to the original part. The UVZ series is suitable for applications requiring enhanced thermal endurance.

Q: What is the impact of the height difference between KMG35VB331M10X12LL and EKMG350ELL331MJC5S?

A: The EKMG350ELL331MJC5S has a maximum seated height of 0.551" (14.00 mm) versus 0.492" (12.50 mm) for the original. This 1.50 mm increase must be evaluated against PCB layout constraints, component spacing, and enclosure clearances. If height is critical, select UKT1V331MPD or UVZ1V331MPD, both with 0.492" maximum height.

Q: Can these substitutes be used interchangeably in audio applications?

A: Yes. The UKT1V331MPD is specifically rated for audio applications. The EKMG350ELL331MJC5S and UVZ1V331MPD are rated for general-purpose applications, which encompasses audio use. All three parts meet the electrical and thermal requirements for audio circuit implementation.

Q: Is ESR (Equivalent Series Resistance) a factor in selecting a substitute?

A: The original KMG35VB331M10X12LL specifies 703 mOhm ESR @ 120 Hz. The substitute parts do not provide ESR specifications in the available data. ESR is not a constraint for substitution; however, if ESR performance is critical to circuit function, contact the manufacturer for detailed ESR specifications before final selection.

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