LLS2Z821MELZ Equivalent & Substitute Parts

Part Overview

The LLS2Z821MELZ is an 820 µF, 180 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 currently active in production with full RoHS3 compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part number becomes unavailable or when alternative mechanical configurations are required.

Substiute Parts

LLS2Z821MELZ

NichiconIn Stock: 833LLS2Z821MELZ Datasheet

Current PartRFQ

LLS2Z821MELB

NichiconIn Stock: 745LLS2Z821MELB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LLS2Z821MELZ is determined by strict equivalence in the following electrical and mechanical parameters:

• Capacitance: 820 µF (exact match required)
• Voltage Rating: 180 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime: 3000 Hrs @ 85°C (exact match required)
• Operating Temperature: -40°C ~ 85°C (exact match required)
• Polarization: Polar (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package Style: Radial, Can - Snap-In (exact match required)
• Lead Spacing: 0.394" (10.00 mm) (exact match required)
• Compliance: RoHS3 Compliant (exact match required)

The substitute part LLS2Z821MELB meets all electrical specifications identically. Physical dimensions (diameter and height) differ, which may affect board layout and mechanical fit but does not impact electrical performance or functional compatibility in applications where space constraints permit the alternative form factor.

Parameter Comparison

Engineering Selection Recommendations

Both the LLS2Z821MELZ and LLS2Z821MELB are active production parts from Nichicon with identical electrical specifications and full RoHS3 compliance. Selection between these parts is determined by mechanical fit requirements on the printed circuit board.

The LLS2Z821MELZ features a smaller diameter (22.00 mm) and greater height (40.00 mm), suitable for applications with vertical space availability and limited horizontal board area. The LLS2Z821MELB provides a larger diameter (30.00 mm) with reduced height (25.00 mm), appropriate for designs with horizontal space constraints or lower-profile enclosures.

Ripple current ratings differ slightly between the two parts. The LLS2Z821MELZ supports 2.86 A at 120 Hz and 4.29 A at 50 kHz, while the LLS2Z821MELB supports 2.69 A at 120 Hz and 4.035 A at 50 kHz. Circuit designs must confirm that the selected part's ripple current rating meets or exceeds the application requirement.

Both parts maintain identical electrical performance, temperature range, lifetime rating, and compliance certifications, ensuring functional interchangeability in circuits where the physical form factor is compatible with the board layout.

Frequently Asked Questions (FAQ)

Q: Can LLS2Z821MELB be used as a direct replacement for LLS2Z821MELZ?

A: Yes, provided the physical dimensions are compatible with the printed circuit board layout. Both parts are electrically identical with the same capacitance, voltage rating, tolerance, lifetime, and operating temperature range. The primary difference is the can diameter and height.

Q: What is the difference in ripple current handling between these parts?

A: The LLS2Z821MELZ supports higher ripple current ratings: 2.86 A at 120 Hz and 4.29 A at 50 kHz, compared to the LLS2Z821MELB at 2.69 A and 4.035 A respectively. Circuit designs must confirm the selected part meets the application's ripple current requirement.

Q: Are both parts RoHS3 compliant?

A: Yes, both LLS2Z821MELZ and LLS2Z821MELB are RoHS3 compliant and suitable for applications requiring environmental compliance certification.

Q: What determines which part to select?

A: Selection is based on available board space. The LLS2Z821MELZ (22.00 mm diameter, 40.00 mm height) is suitable for designs with vertical clearance. The LLS2Z821MELB (30.00 mm diameter, 25.00 mm height) is appropriate for low-profile applications. Both require the same 0.394" (10.00 mm) lead spacing.

Q: Do these parts have identical electrical performance?

A: Both parts share identical capacitance (820 µF), voltage rating (180 V), tolerance (±20%), lifetime (3000 Hrs @ 85°C), and operating temperature range (-40°C ~ 85°C). Ripple current ratings differ slightly and must be verified for the specific application.