LAS2G151MELB25 Equivalent & Substitute Parts

Part Overview

The LAS2G151MELB25 is a 150 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 2000 hours at 105°C and is designed for general purpose applications requiring through-hole mounting. The part is currently active in production with 273,782 units in stock.

Substitute parts are necessary when the original LAS2G151MELB25 becomes unavailable, when design requirements demand extended operational lifetime, higher voltage ratings, or when alternative manufacturers are preferred for supply chain diversification.

Substiute Parts

LAS2G151MELB25

NichiconIn Stock: 273856LAS2G151MELB25 Datasheet

Current PartRFQ

LGU2G151MELB

NichiconIn Stock: 3643LGU2G151MELB Datasheet

DirectRFQ

LGN2W151MELB25

NichiconIn Stock: 5840LGN2W151MELB25 Datasheet

UpgradeRFQ

LGX2W151MELB25

NichiconIn Stock: 994LGX2W151MELB25 Datasheet

UpgradeRFQ

LQS2W151MELB25

NichiconIn Stock: 1177LQS2W151MELB25 Datasheet

UpgradeRFQ

LAQ2G151MELB25

NichiconIn Stock: 274133LAQ2G151MELB25 Datasheet

Parametric EquivalentRFQ

450VXG150MEFC30X25

RubyconIn Stock: 1217450VXG150MEFC30X25 Datasheet

UpgradeRFQ

450VXG150MEFCSN30X25

RubyconIn Stock: 1076450VXG150MEFCSN30X25 Datasheet

UpgradeRFQ

475MXH150MEFCSN30X25

RubyconIn Stock: 880475MXH150MEFCSN30X25 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Direct Equivalents maintain identical electrical specifications (150 µF, 400 V, ±20% tolerance) and mechanical dimensions (30 mm diameter, 10 mm lead spacing, snap-in package). These parts are interchangeable without circuit modification.

Parametric Equivalents match the primary electrical parameters (150 µF, 400 V, ±20% tolerance) and physical footprint but may differ in lifetime rating or ripple current handling. These are suitable for applications where the original lifetime specification is not a limiting constraint.

Upgrade Substitutes provide enhanced performance through higher voltage ratings (450 V or 475 V) or extended lifetime (3000 or 5000 hours at 105°C) while maintaining the same capacitance, tolerance, and mechanical compatibility. These parts are backward-compatible and offer improved reliability margins.

Cross-Manufacturer Substitutes are functionally equivalent parts from alternative manufacturers (Rubycon) that meet the same electrical and mechanical specifications, enabling supply chain flexibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: LGU2G151MELB provides identical electrical performance with extended 3000-hour lifetime at the same 400 V rating. This part maintains full mechanical and electrical compatibility while offering improved reliability. Both Nichicon parts carry ROHS3 compliance and REACH unaffected status.

For Enhanced Reliability: LGX2W151MELB25 or the Rubycon equivalents (450VXG150MEFC30X25, 450VXG150MEFCSN30X25) deliver 5000-hour lifetime ratings at elevated 450 V voltage specifications. These upgrades are suitable for applications requiring extended service intervals or higher voltage margins. All upgrade substitutes maintain ROHS3 compliance.

For Supply Chain Flexibility: Rubycon VXG series (450VXG150MEFC30X25, 450VXG150MEFCSN30X25) provide cross-manufacturer alternatives with equivalent mechanical footprints and superior lifetime specifications. These parts are ROHS3 compliant and suitable for applications where manufacturer diversification is required.

For Voltage Margin Applications: 475MXH150MEFCSN30X25 offers the highest voltage rating (475 V) among available substitutes, providing maximum voltage headroom for circuits operating near the 400 V specification limit.

Frequently Asked Questions (FAQ)

Q: Can LGU2G151MELB replace LAS2G151MELB25 directly? A: Yes. LGU2G151MELB is a direct equivalent with identical capacitance (150 µF), voltage rating (400 V), tolerance (±20%), and mechanical dimensions. The primary difference is extended lifetime (3000 hours versus 2000 hours at 105°C). No circuit modifications are required.

Q: What is the difference between 400 V and 450 V rated substitutes? A: The 450 V rated parts (LGN2W151MELB25, LQS2W151MELB25, LGX2W151MELB25, and Rubycon VXG series) provide higher voltage margin. These are backward-compatible with 400 V circuit designs and offer improved safety margins. The 475 V part (475MXH150MEFCSN30X25) provides maximum voltage headroom.

Q: Does the height difference between LAS2G151MELB25 (27.00 mm) and LGU2G151MELB (25.00 mm) affect compatibility? A: The 2 mm height reduction in LGU2G151MELB does not affect electrical compatibility. Mechanically, the shorter height provides additional clearance in space-constrained applications. Both parts maintain identical lead spacing (10.00 mm) and case diameter (30.00 mm).

Q: Are Rubycon VXG series parts suitable for applications originally designed for Nichicon LAS series? A: Yes. The Rubycon 450VXG150MEFC30X25 and 450VXG150MEFCSN30X25 maintain identical mechanical footprints (30 mm diameter, 10 mm lead spacing, snap-in package) and electrical specifications (150 µF, ±20% tolerance). Both are ROHS3 compliant. The 450 V rating provides voltage upgrade capability.

Q: What lifetime rating should I select for long-term reliability? A: The original LAS2G151MELB25 specifies 2000 hours at 105°C. For extended service life, LGU2G151MELB (3000 hours) provides moderate improvement. For maximum reliability, LGX2W151MELB25 or Rubycon VXG series (5000 hours) are recommended, particularly for applications with continuous operation or elevated ambient temperatures.

Q: Can I use 450 V or 475 V rated parts in a 400 V circuit? A: Yes. Higher voltage-rated capacitors are backward-compatible with lower voltage circuits. A 450 V or 475 V capacitor operating at 400 V experiences reduced electrical stress and typically exhibits improved reliability and extended operational life.