LGNW6151MELY40 Equivalent & Substitute Parts

Part Overview

The LGNW6151MELY40 is a 150 µF, 420 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is Active status and ROHS3 compliant. Substitute parts are necessary when the primary part is unavailable, when inventory constraints require alternative sourcing, or when design flexibility permits selection from equivalent electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	150 µF
Voltage - Rated	420 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Polarization	Polar
Package / Case	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: capacitance value (150 µF), rated voltage (420 V), tolerance (±20%), polarization (Polar), package type (Radial, Can - Snap-In), mounting type (Through Hole), and lead spacing (10.00mm). All substitute parts listed meet these core electrical and mechanical requirements. Variations in physical dimensions (diameter and height), ripple current ratings, and lifetime specifications are documented to enable informed selection based on application constraints and board layout considerations.

Parameter Comparison

Parameter	LGNW6151MELY40	LGUW6151MELZ	LGUW6151MELB	LGGW6151MELA25
Manufacturer	Nichicon	Nichicon	Nichicon	Nichicon
Series	LGN	LGU	LGU	LGG
Capacitance	150 µF	150 µF	150 µF	150 µF
Voltage - Rated	420 V	420 V	420 V	420 V
Tolerance	±20%	±20%	±20%	±20%
Lifetime @ Temp.	3000 Hrs @ 105°C	3000 Hrs @ 105°C	3000 Hrs @ 105°C	2000 Hrs @ 105°C
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C
Polarization	Polar	Polar	Polar	Polar
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Lead Spacing	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Size / Dimension (Dia)	0.787" (20.00mm)	0.866" (22.00mm)	1.181" (30.00mm)	0.984" (25.00mm)
Height - Seated (Max)	1.654" (42.00mm)	1.575" (40.00mm)	0.984" (25.00mm)	1.063" (27.00mm)
Ripple Current @ 120 Hz	840 mA	880 mA	880 mA	820 mA
Ripple Current @ 50 kHz	1.2012 A	1.2584 A	1.2584 A	1.1726 A
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts are Active status components manufactured by Nichicon and are ROHS3 compliant and REACH unaffected, meeting regulatory requirements equivalent to the primary part LGNW6151MELY40.

LGUW6151MELZ and LGUW6151MELB are direct functional equivalents with 3000-hour lifetime ratings matching the primary part. Selection between these and LGNW6151MELY40 depends on physical space constraints. LGUW6151MELZ has a smaller diameter (22.00mm) and greater height (40.00mm), while LGUW6151MELB has a larger diameter (30.00mm) and reduced height (25.00mm). The primary part LGNW6151MELY40 offers a mid-range profile (20.00mm diameter, 42.00mm height).

LGGW6151MELA25 operates at a reduced lifetime specification of 2000 hours at 105°C compared to the 3000-hour rating of the primary part and other substitutes. This part is suitable only for applications where the lower lifetime rating is acceptable. It features a 25.00mm diameter and 27.00mm height, providing a compact profile.

All parts maintain identical electrical specifications: 150 µF capacitance, 420 V rated voltage, ±20% tolerance, and polar configuration. Ripple current ratings vary slightly across the range, with LGUW6151MELZ and LGUW6151MELB offering marginally higher ripple current capacity (1.2584 A @ 50 kHz) compared to the primary part (1.2012 A @ 50 kHz).

Frequently Asked Questions (FAQ)

Q: Can LGGW6151MELA25 be used as a direct replacement for LGNW6151MELY40?

A: LGGW6151MELA25 meets all core electrical requirements (150 µF, 420 V, ±20% tolerance, polar configuration) and mechanical specifications (radial snap-in package, 10.00mm lead spacing, through-hole mounting). However, it operates at 2000 hours lifetime at 105°C versus 3000 hours for LGNW6151MELY40. Selection depends on application duty cycle and expected operational life requirements.

Q: What are the physical space implications of selecting LGUW6151MELB over LGNW6151MELY40?

A: LGUW6151MELB has a larger diameter (30.00mm versus 20.00mm) but significantly reduced height (25.00mm versus 42.00mm). Applications with vertical space constraints may benefit from LGUW6151MELB, while those with horizontal space limitations should retain LGNW6151MELY40 or consider LGUW6151MELZ.

Q: Are all substitute parts suitable for high-ripple-current applications?

A: Ripple current ratings vary across the substitute range. LGUW6151MELZ and LGUW6151MELB both support 1.2584 A @ 50 kHz, exceeding the primary part's 1.2012 A rating. LGGW6151MELA25 supports 1.1726 A @ 50 kHz, which is lower. Applications requiring maximum ripple current handling should prioritize LGUW6151MELZ or LGUW6151MELB.

Q: Do all parts share identical lead spacing and mounting compatibility?

A: All substitute parts maintain 0.394" (10.00mm) lead spacing and through-hole radial snap-in mounting, ensuring PCB footprint compatibility with LGNW6151MELY40. Physical diameter and height variations require verification against available board space.

Q: What compliance certifications apply to all parts in this substitution group?

A: All parts are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory standards. All components are Active status products from Nichicon.

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