Equivalent & Substitute Parts for KMQ250VS331M22X30T2

Part Overview

The KMQ250VS331M22X30T2 is a 330 µF, 250 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KMQ series. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing applications. The part features a radial, can-style snap-in package with through-hole mounting, designed for general-purpose applications requiring 2000-hour lifetime at 105°C operating temperature.

Substiute Parts

KMQ250VS331M22X30T2

Chemi-ConIn Stock: 1015KMQ250VS331M22X30T2 Datasheet

Current PartRFQ

EKMQ251VSN331MP30S

Chemi-ConIn Stock: 886EKMQ251VSN331MP30S Datasheet

SimilarRFQ

381LQ331M250H022

Cornell Dubilier Electronics (CDE)In Stock: 85806381LQ331M250H022 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KMQ250VS331M22X30T2 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Criteria:

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 250 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package Type: Radial, Can - Snap-In (exact match required)
• Lead Spacing: 0.394" (10.00 mm) (exact match required)
• Physical Dimensions: 0.866" Dia × 1.260" Height (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lifetime: 2000 Hrs @ 105°C (exact match required)

Acceptable Variation Parameters:

• ESR (Equivalent Series Resistance): Variation permitted within component design specifications
• Operating Temperature Range: Extended lower temperature limits acceptable
• RoHS/REACH Compliance: Upgraded compliance status acceptable
• Product Status: Active status preferred over obsolete

Two substitute parts meet these criteria and are documented in the provided substitute list.

Parameter Comparison

Engineering Selection Recommendations

EKMQ251VSN331MP30S (Chemi-Con): This part is a direct manufacturer equivalent from Chemi-Con, maintaining identical electrical and mechanical specifications to the main part. The EKMQ251VSN331MP30S is classified as active product status, ensuring continued availability and supply chain support. This part achieves ROHS3 compliance, representing an upgrade from the non-compliant main part. Selection of this substitute provides continuity within the same manufacturer's product line while improving regulatory compliance posture.

381LQ331M250H022 (Cornell Dubilier Electronics): This part is a cross-manufacturer substitute produced by Cornell Dubilier Electronics. It meets all mandatory equivalence criteria and provides superior ESR performance (502 mOhm versus 754 mOhm), resulting in lower heat dissipation characteristics. The operating temperature range extends to -40°C, providing enhanced low-temperature performance. This part is classified as active with ROHS3 compliance. Significantly higher inventory availability (85738 units) supports extended supply chain security. Selection of this substitute is appropriate when cross-manufacturer sourcing is acceptable and lower ESR performance is beneficial.

Frequently Asked Questions (FAQ)

Q: Can EKMQ251VSN331MP30S be used as a direct replacement for KMQ250VS331M22X30T2?

A: Yes. The EKMQ251VSN331MP30S meets all mandatory equivalence criteria: identical capacitance (330 µF), voltage rating (250 V), tolerance (±20%), package type (radial snap-in), physical dimensions (22 mm diameter × 32 mm height), lead spacing (10 mm), and lifetime rating (2000 hours @ 105°C). Both parts are manufactured by Chemi-Con and are electrically and mechanically interchangeable.

Q: What are the advantages of selecting 381LQ331M250H022 over EKMQ251VSN331MP30S?

A: The 381LQ331M250H022 offers lower ESR (502 mOhm versus unspecified for EKMQ251VSN331MP30S), extended low-temperature operating range (-40°C versus -25°C), and significantly higher inventory availability. These characteristics make it suitable for applications requiring superior thermal performance or extended environmental operating conditions.

Q: Are there any electrical performance differences between these substitutes?

A: The 381LQ331M250H022 specifies lower ESR at 502 mOhm @ 120 Hz compared to the main part's 754 mOhm @ 120 Hz. Ripple current specifications are equivalent at 1.2 A @ 120 Hz across all parts. High-frequency ripple current for 381LQ331M250H022 is specified at 1.68 A @ 20 kHz, compared to 1.8 A @ 50 kHz for the main part, reflecting different measurement conditions rather than performance degradation.

Q: Do all substitute parts meet current regulatory requirements?

A: Both substitute parts are ROHS3 compliant, representing an upgrade from the non-compliant main part. Both are REACH unaffected. The main part KMQ250VS331M22X30T2 is classified as RoHS non-compliant, making substitution necessary for applications requiring regulatory compliance.

Q: What is the physical compatibility of these parts in existing PCB designs?

A: All three parts share identical through-hole mounting specifications: 0.394" (10.00 mm) lead spacing, 0.866" (22.00 mm) diameter, and 1.260" (32.00 mm) seated height. PCB footprints designed for the main part KMQ250VS331M22X30T2 accommodate both substitute parts without modification.

Q: Which substitute should be selected for new designs?

A: For new designs, either substitute is appropriate based on specific application requirements. EKMQ251VSN331MP30S maintains manufacturer continuity with Chemi-Con. 381LQ331M250H022 provides superior ESR performance and extended low-temperature capability with higher inventory availability. Selection depends on thermal performance requirements, supply chain preferences, and cost considerations.