LLG2W271MELZ45 Equivalent & Substitute Parts

Part Overview

The LLG2W271MELZ45 is a 270 µF, 450 V aluminum electrolytic capacitor manufactured by Nichicon in the LLG series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring stable capacitance and extended operational life. The part is currently active in production with 273,782 units in stock. Equivalent parts become necessary when primary inventory is depleted, when supply chain constraints occur, or when design flexibility across qualified manufacturers is required for production continuity.

Substiute Parts

LLG2W271MELZ45

NichiconIn Stock: 273796LLG2W271MELZ45 Datasheet

Current PartRFQ

ESMR451VSN271MP45S

Chemi-ConIn Stock: 1112ESMR451VSN271MP45S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LLG2W271MELZ45 is determined by strict equivalence across the following critical parameters:

• Capacitance value: 270 µF (exact match required)
• Voltage rating: 450 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime specification: 2000 Hrs @ 85°C (exact match required)
• Operating temperature range: -25°C ~ 85°C (exact match required)
• Lead spacing: 0.394" (10.00 mm) (exact match required)
• Physical diameter: 0.866" (22.00 mm) (exact match required)
• Package type: Radial, Can - Snap-In (exact match required)
• Mounting type: Through Hole (exact match required)

The ESMR451VSN271MP45S from Chemi-Con meets all substitution criteria and is classified as a direct equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the LLG2W271MELZ45 and ESMR451VSN271MP45S are active production parts with full regulatory compliance. The Nichicon LLG2W271MELZ45 maintains higher current inventory availability at 273,782 units. The Chemi-Con ESMR451VSN271MP45S provides equivalent electrical performance with marginally higher ripple current ratings and is available with 1,089 units in stock.

Both parts carry RoHS and REACH compliance certifications, confirming suitability for regulated applications. The 0.02" (0.50 mm) difference in seated height between the two parts falls within typical PCB layout tolerances for through-hole snap-in capacitors and does not affect functional compatibility.

Selection between these parts should be based on inventory availability, supply chain lead times, and procurement cost considerations.

Frequently Asked Questions (FAQ)

Q: Can the ESMR451VSN271MP45S replace the LLG2W271MELZ45 in existing designs?

A: Yes. Both parts share identical electrical specifications (270 µF, 450 V, ±20% tolerance, 2000 Hrs @ 85°C), identical lead spacing (10.00 mm), identical diameter (22.00 mm), and identical package type (Radial, Can - Snap-In). The 0.02" height difference is within standard PCB design tolerances for through-hole components.

Q: Are there differences in ripple current handling?

A: The ESMR451VSN271MP45S exhibits higher ripple current ratings at both 120 Hz (1.88 A vs. 1.66 A) and 50 kHz (2.6884 A vs. 2.3738 A). This represents improved thermal performance and does not create compatibility issues when substituting into existing circuits.

Q: Do both parts meet regulatory requirements?

A: Yes. Both the LLG2W271MELZ45 and ESMR451VSN271MP45S are RoHS compliant, REACH unaffected, and classified under ECCN EAR99. Both carry identical HTSUS classification (8532.22.0040).

Q: What is the difference between ROHS3 and RoHS compliance?

A: ROHS3 Compliant indicates compliance with the most recent RoHS directive revision. RoHS Compliant indicates general RoHS directive adherence. Both designations confirm the absence of restricted substances and are functionally equivalent for component selection purposes.

Q: Are there any mechanical considerations for PCB layout?

A: Both parts are through-hole mounted with snap-in case styles. The lead spacing of 10.00 mm is identical. The maximum seated height difference of 0.50 mm is negligible for standard PCB design and does not require layout modifications.