LLS2W121MELB Equivalent & Substitute Parts

Part Overview

The LLS2W121MELB is a 120 µF, 450 V aluminum electrolytic capacitor manufactured by Nichicon in the LLS series. This radial, can-style snap-in capacitor is rated for 3000 hours at 85°C and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified when design requirements change, inventory constraints occur, or when alternative manufacturers offer compatible specifications within the allowed electrical and mechanical parameters.

Key Parameters

Parameter	Value
Capacitance	120 µF
Voltage - Rated	450 V
Tolerance	±20%
Polarization	Polar
Package / Case	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
Size / Dimension	1.181" Dia (30.00 mm)
Height - Seated (Max)	0.984" (25.00 mm)
Operating Temperature	-25°C ~ 85°C
Lifetime @ Temp.	3000 Hrs @ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence in the following parameters:

Capacitance: 120 µF (exact match required)
Voltage - Rated: 450 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Package / Case: Radial, Can - Snap-In (exact match required)
Mounting Type: Through Hole (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Size / Dimension: 1.181" Dia (30.00 mm) (exact match required)
Height - Seated (Max): 0.984" (25.00 mm) (exact match required)

Substitute parts may vary in operating temperature range, lifetime rating, ripple current specifications, and ESR values while maintaining mechanical and primary electrical compatibility. All substitute parts listed are Active status and ROHS3 compliant.

Parameter Comparison

Parameter	LLS2W121MELB (Nichicon)	LGU2W121MELB (Nichicon)	380LQ121M450H022 (CDE)	ESMQ451VSN121MP30S (Chemi-Con)
Manufacturer	Nichicon	Nichicon	Cornell Dubilier Electronics	Chemi-Con
Series	LLS	LGU	380LQ	SMQ
Capacitance	120 µF	120 µF	120 µF	120 µF
Voltage - Rated	450 V	450 V	450 V	450 V
Tolerance	±20%	±20%	±20%	±20%
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" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Size / Dimension	1.181" Dia (30.00 mm)	1.181" Dia (30.00 mm)	0.866" Dia (22.00 mm)	0.866" Dia (22.00 mm)
Height - Seated (Max)	0.984" (25.00 mm)	0.984" (25.00 mm)	1.260" (32.00 mm)	1.181" (30.00 mm)
Operating Temperature	-25°C ~ 85°C	-25°C ~ 105°C	-25°C ~ 85°C	-25°C ~ 85°C
Lifetime @ Temp.	3000 Hrs @ 85°C	3000 Hrs @ 105°C	2000 Hrs @ 85°C	2000 Hrs @ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant

Engineering Selection Recommendations

LGU2W121MELB (Nichicon) is a direct equivalent within the same manufacturer family. It maintains identical mechanical dimensions and lead spacing while offering extended operating temperature range (-25°C ~ 105°C) and identical lifetime rating at elevated temperature (3000 Hrs @ 105°C). Both parts are ROHS3 compliant and Active status.

380LQ121M450H022 (Cornell Dubilier Electronics) and ESMQ451VSN121MP30S (Chemi-Con) are mechanically compatible substitutes with identical capacitance, voltage, tolerance, and lead spacing. However, both parts feature reduced physical dimensions (0.866" Dia vs. 1.181" Dia) and different height profiles. Both are rated for 2000 hours at 85°C, lower than the LLS2W121MELB rating. All substitute parts maintain Active product status and appropriate compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can LGU2W121MELB be used as a direct replacement for LLS2W121MELB?

A: Yes. Both parts share identical capacitance (120 µF), voltage rating (450 V), tolerance (±20%), mechanical dimensions (1.181" Dia, 0.984" height), and lead spacing (10.00 mm). The LGU series offers extended operating temperature range and is ROHS3 compliant.

Q: Are 380LQ121M450H022 and ESMQ451VSN121MP30S mechanically compatible with LLS2W121MELB?

A: These parts have identical lead spacing (10.00 mm) and electrical specifications (120 µF, 450 V, ±20%). However, they feature smaller diameter (0.866" vs. 1.181") and different height profiles. Physical space constraints in the application must be evaluated before substitution.

Q: What is the difference in lifetime ratings between substitute parts?

A: LLS2W121MELB and LGU2W121MELB are rated for 3000 hours at their respective temperature ratings. 380LQ121M450H022 and ESMQ451VSN121MP30S are rated for 2000 hours at 85°C. Application duty cycle and thermal environment determine whether reduced lifetime is acceptable.

Q: Are all substitute parts RoHS compliant?

A: LLS2W121MELB, LGU2W121MELB, and 380LQ121M450H022 are ROHS3 compliant. ESMQ451VSN121MP30S is RoHS compliant. All parts meet regulatory requirements for their respective markets.

Q: Can these parts be used interchangeably in high-ripple-current applications?

A: Ripple current specifications vary across manufacturers and series. Selection must be based on application ripple current requirements at the specified frequency. Consult individual datasheets for ripple current ratings at your operating frequency.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message