LGU1C183MELZ Equivalent & Substitute Parts

Part Overview

The LGU1C183MELZ is an 18000 µF, 16 V aluminum electrolytic capacitor manufactured by Nichicon in the LGU series. This radial, can-style snap-in component is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring high capacitance in a compact through-hole package. The part is Active status and ROHS3 compliant.

Substitute parts are necessary when the original LGU1C183MELZ is unavailable, when design requirements demand extended lifetime ratings, or when alternative physical dimensions better suit board layout constraints while maintaining electrical equivalence.

Key Parameters

Parameter	Value
Capacitance	18000 µF
Voltage Rating	16 V
Tolerance	±20%
Lifetime @ 105°C	3000 Hrs
Operating Temperature Range	-40°C ~ 105°C
Polarization	Polar
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LGU1C183MELZ is determined by strict equivalence in the following parameters:

Capacitance: 18000 µF (exact match required)
Voltage Rating: 16 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Mounting Type: Through Hole (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)

Substitute parts may vary in:

Physical Dimensions (diameter and height): Variations are acceptable provided the component fits within available board space and does not interfere with adjacent components
Lifetime Rating: Extended lifetime (5000 Hrs @ 105°C) is acceptable and represents an improvement over the base specification
Ripple Current Ratings: Minor variations within the same electrical class are acceptable

All substitute parts listed are manufactured by Nichicon, maintain ROHS3 compliance, and operate within the specified temperature range.

Parameter Comparison

Part Number	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Diameter	Height (Max)	Lead Spacing	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz
LGU1C183MELZ	LGU	18000 µF	16 V	±20%	3000 Hrs	0.866" (22.00 mm)	1.850" (47.00 mm)	0.394" (10.00 mm)	2.98 A	3.427 A
LGU1C183MELB	LGU	18000 µF	16 V	±20%	3000 Hrs	1.181" (30.00 mm)	1.260" (32.00 mm)	0.394" (10.00 mm)	3 A	3.45 A
LGY1C183MELA40	LGY	18000 µF	16 V	±20%	5000 Hrs	0.984" (25.00 mm)	1.654" (42.00 mm)	0.394" (10.00 mm)	3 A	3.45 A
LGY1C183MELB30	LGY	18000 µF	16 V	±20%	5000 Hrs	1.181" (30.00 mm)	1.260" (32.00 mm)	0.394" (10.00 mm)	3 A	3.45 A
LGY1C183MELZ50	LGY	18000 µF	16 V	±20%	5000 Hrs	0.866" (22.00 mm)	2.047" (52.00 mm)	0.394" (10.00 mm)	3 A	3.45 A

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance equivalent to the LGU1C183MELZ.

LGU1C183MELB: Direct series equivalent with identical 3000-hour lifetime. Suitable for direct replacement where board layout accommodates the larger 30 mm diameter and shorter 32 mm height profile.

LGY1C183MELA40: Extended-lifetime variant (5000 Hrs @ 105°C) in the LGY series. Recommended for applications requiring enhanced reliability. Intermediate physical dimensions (25 mm diameter, 42 mm height) provide a compromise between the original and larger alternatives.

LGY1C183MELB30: Extended-lifetime variant (5000 Hrs @ 105°C) with identical physical footprint to LGU1C183MELB. Optimal choice when both extended lifetime and compact height (32 mm) are required.

LGY1C183MELZ50: Extended-lifetime variant (5000 Hrs @ 105°C) with identical diameter to the original LGU1C183MELZ but increased height (52 mm). Suitable when diameter constraint is critical and additional height is acceptable.

Frequently Asked Questions (FAQ)

Q: Can I use an LGY series part as a direct replacement for an LGU series part?

A: Yes. Both LGU and LGY series parts listed share identical electrical specifications (18000 µF, 16 V, ±20% tolerance) and package type (radial, can-style snap-in, through-hole). The LGY series offers extended lifetime (5000 Hrs @ 105°C versus 3000 Hrs), which is a functional improvement. Physical dimensions vary by specific part number and must be verified against available board space.

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

A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C). The LGU1C183MELZ is rated for 3000 hours at 105°C. LGY series substitutes extend this to 5000 hours. Selection depends on application duty cycle and expected service life requirements.

Q: Do all substitute parts have the same physical dimensions?

A: No. While all parts maintain the same 10 mm lead spacing, diameter and height vary. The original LGU1C183MELZ measures 22 mm diameter × 47 mm height. Substitutes range from 22 mm to 30 mm diameter and 32 mm to 52 mm height. Board layout must accommodate the selected alternative.

Q: Are all parts ROHS3 compliant?

A: Yes. All listed parts, including the original LGU1C183MELZ and all substitutes, are ROHS3 compliant and REACH unaffected.

Q: Can I substitute based on ripple current ratings alone?

A: No. Ripple current is a secondary parameter. Primary substitution criteria are capacitance, voltage rating, tolerance, polarization, package type, mounting type, and lead spacing. All listed parts meet these primary criteria. Ripple current variations (2.98 A to 3.45 A @ 120 Hz) are within acceptable engineering tolerance for this component class.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message