KMQ350VS331M22X45T2 Equivalent & Substitute Parts

Part Overview

The KMQ350VS331M22X45T2 is a 330 µF, 350 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KMQ series. This component features a radial, can-style snap-in package designed for through-hole mounting in general-purpose applications. The part is classified as obsolete, necessitating identification of equivalent substitute components that maintain electrical and mechanical compatibility with existing designs.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage - Rated	350 V
Tolerance	±20%
ESR @ 120Hz	754 mOhm
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-25°C ~ 105°C
Ripple Current @ 120 Hz	1.2 A
Ripple Current @ 50 kHz	1.716 A
Lead Spacing	0.394" (10.00 mm)
Diameter	0.866" (22.00 mm)
Height - Seated (Max)	1.850" (47.00 mm)
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Polarization	Polar

Substitute Part Grouping Explanation

Substitution of the KMQ350VS331M22X45T2 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 350 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime: 2000 Hrs @ 105°C (exact match required)
Operating Temperature Range: -25°C ~ 105°C (exact match required)
Ripple Current Ratings: 1.2 A @ 120 Hz and 1.716 A @ 50 kHz (exact match required)

Mechanical Parameters:

Lead Spacing: 0.394" (10.00 mm) (exact match required)
Diameter: 0.866" (22.00 mm) (exact match required)
Height: 1.850" (47.00 mm) (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Mounting Type: Through Hole (exact match required)

Substitute parts must satisfy all electrical and mechanical parameters listed above to ensure direct compatibility without circuit redesign or PCB modification.

Parameter Comparison

Parameter	KMQ350VS331M22X45T2	EKMQ351VSN331MP45S	Match Status
Manufacturer	Chemi-Con	Chemi-Con	Match
Series	KMQ	KMQ	Match
Capacitance	330 µF	330 µF	Match
Voltage - Rated	350 V	350 V	Match
Tolerance	±20%	±20%	Match
Lifetime @ 105°C	2000 Hrs	2000 Hrs	Match
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C	Match
Ripple Current @ 120 Hz	1.2 A	1.2 A	Match
Ripple Current @ 50 kHz	1.716 A	1.716 A	Match
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	Match
Diameter	0.866" (22.00 mm)	0.866" (22.00 mm)	Match
Height - Seated (Max)	1.850" (47.00 mm)	1.850" (47.00 mm)	Match
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Match
Mounting Type	Through Hole	Through Hole	Match
Polarization	Polar	Polar	Match
Product Status	Obsolete	Active	Substitute Available
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Improved Compliance

Engineering Selection Recommendations

The EKMQ351VSN331MP45S is a direct electrical and mechanical equivalent to the KMQ350VS331M22X45T2. Both components are manufactured by Chemi-Con within the KMQ series and share identical capacitance, voltage rating, tolerance, lifetime rating, operating temperature range, ripple current specifications, and physical dimensions.

The primary distinction between these parts is product status and regulatory compliance. The KMQ350VS331M22X45T2 is classified as obsolete and carries RoHS non-compliant status. The EKMQ351VSN331MP45S is an active product with ROHS3 compliance, making it the appropriate selection for new designs and applications requiring current regulatory adherence.

Both components are suitable for general-purpose applications requiring 330 µF capacitance at 350 V with through-hole snap-in mounting. The electrical performance, thermal characteristics, and physical footprint are identical, ensuring direct substitution without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the EKMQ351VSN331MP45S be used as a direct replacement for the KMQ350VS331M22X45T2?

A: Yes. Both components are electrically and mechanically equivalent. They share identical capacitance (330 µF), voltage rating (350 V), tolerance (±20%), lifetime (2000 Hrs @ 105°C), operating temperature range (-25°C ~ 105°C), ripple current specifications, and physical dimensions (22.00 mm diameter, 47.00 mm height, 10.00 mm lead spacing). Direct substitution is possible without PCB modification or circuit redesign.

Q: What is the primary reason to substitute the KMQ350VS331M22X45T2?

A: The KMQ350VS331M22X45T2 is classified as obsolete. The EKMQ351VSN331MP45S is an active product from the same manufacturer and series, ensuring continued availability and supply chain reliability.

Q: Are there compliance differences between these parts?

A: Yes. The KMQ350VS331M22X45T2 is RoHS non-compliant, while the EKMQ351VSN331MP45S is ROHS3 compliant. For applications subject to RoHS regulations, the EKMQ351VSN331MP45S is the required selection.

Q: Do these capacitors have identical physical dimensions?

A: Yes. Both components have a diameter of 0.866" (22.00 mm), seated height of 1.850" (47.00 mm), and lead spacing of 0.394" (10.00 mm). They use identical radial, can-style snap-in packages suitable for through-hole mounting.

Q: Is the ESR specification identical for both parts?

A: The KMQ350VS331M22X45T2 specifies ESR of 754 mOhm @ 120 Hz. The EKMQ351VSN331MP45S does not provide an ESR specification in the available data. However, both components share identical ripple current ratings (1.2 A @ 120 Hz and 1.716 A @ 50 kHz), which are the primary performance criteria for general-purpose applications.

Q: Can these capacitors be used interchangeably in existing assemblies?

A: Yes. The electrical and mechanical specifications are identical, and both components use the same through-hole snap-in mounting interface. No assembly process modification is required.

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