LQS2V331MELA40 Equivalent & Substitute Parts

Part Overview

The LQS2V331MELA40 is a 330 µF, 350 V aluminum electrolytic capacitor manufactured by Nichicon in the LQS series. This radial, can-style snap-in capacitor is designed for general purpose applications requiring through-hole mounting. The part is currently active in production with 273,982 units in stock. Substitute parts are identified when equivalent capacitance and tolerance values are required but alternative voltage ratings, thermal performance, or manufacturer specifications better suit specific application requirements.

Substiute Parts

LQS2V331MELA40

NichiconIn Stock: 274084LQS2V331MELA40 Datasheet

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ELXS401VSN331MQ40S

Chemi-ConIn Stock: 989ELXS401VSN331MQ40S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LQS2V331MELA40 is based on maintaining electrical equivalence in the following parameters:

• Capacitance Value: 330 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Package Style: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 0.394" (10.00mm) (exact match required)
• Polarization: Polar (exact match required)

Substitute parts may differ in:

• Voltage Rating: Higher voltage ratings are acceptable as they provide backward compatibility
• Thermal Performance: Extended lifetime ratings indicate improved thermal stability
• Physical Dimensions: Minor variations in diameter and height within the same package family
• Manufacturer: Different manufacturers producing equivalent specifications

The ELXS401VSN331MQ40S from Chemi-Con qualifies as a substitute because it maintains all critical electrical and mechanical parameters while offering enhanced voltage rating and thermal performance.

Parameter Comparison

Engineering Selection Recommendations

Both the LQS2V331MELA40 and ELXS401VSN331MQ40S are active production parts with ROHS3 compliance and REACH unaffected status. The ELXS401VSN331MQ40S provides a higher voltage rating (400 V versus 350 V) and extended thermal lifetime (5000 Hrs @ 105°C versus 3000 Hrs @ 105°C), making it suitable for applications requiring enhanced reliability margins or extended operational life. The minor dimensional variation (0.016" diameter difference) remains within the snap-in package family specifications. Selection between these parts depends on application voltage requirements and thermal performance expectations.

Frequently Asked Questions (FAQ)

Q: Can the ELXS401VSN331MQ40S replace the LQS2V331MELA40 in existing designs?

A: Yes. The substitute part maintains identical capacitance (330 µF), tolerance (±20%), lead spacing (10.00mm), and mounting configuration (through-hole, snap-in). The higher voltage rating (400 V) is backward compatible with 350 V applications.

Q: What is the significance of the voltage rating difference?

A: The ELXS401VSN331MQ40S operates at 400 V rated voltage compared to 350 V for the LQS2V331MELA40. This higher rating provides additional safety margin in circuits operating at or near the original 350 V specification.

Q: How do the thermal lifetimes compare?

A: The LQS2V331MELA40 provides 3000 hours at 105°C, while the ELXS401VSN331MQ40S provides 5000 hours at 105°C. Both operate across the same temperature range (-25°C to 105°C).

Q: Are there physical space constraints with the substitute part?

A: The ELXS401VSN331MQ40S has a slightly larger diameter (25.40mm versus 25.00mm) but maintains the same height (42.00mm maximum) and lead spacing (10.00mm). Verify PCB layout clearances before substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting equivalent environmental and regulatory requirements.