Equivalent & Substitute Parts for 861221386021

Part Overview

The Würth Elektronik 861221386021 is a 470 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in configuration, rated for 3000 hours at 85°C. This component is classified as Active and is suitable for general-purpose applications requiring through-hole mounting. Alternative parts become necessary when addressing specific application requirements such as enhanced thermal performance, higher voltage ratings, or alternative manufacturer availability.

Substiute Parts

861221386021

Würth ElektronikIn Stock: 971861221386021 Datasheet

Current PartRFQ

LLS2G471MELC

NichiconIn Stock: 273833LLS2G471MELC Datasheet

DirectRFQ

450MXK470MEFCSN35X35

RubyconIn Stock: 274048450MXK470MEFCSN35X35 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Direct Equivalent (Same Electrical and Mechanical Specifications):

• Capacitance: 470 µF (exact match required)
• Voltage Rating: 400 V (minimum)
• Tolerance: ±20%
• Package Type: Radial, Can - Snap-In
• Lead Spacing: 0.394" (10.00 mm)
• Diameter: 1.378" (35.00 mm)
• Mounting Type: Through Hole
• Polarization: Polar

Upgrade Classification (Enhanced Specifications):

• Parts with voltage ratings exceeding 400 V
• Parts with operating temperature ranges exceeding -25°C ~ 85°C
• Parts with lifetime ratings exceeding 3000 hours at their rated temperature

The Nichicon LLS2G471MELC qualifies as a direct equivalent, matching all critical electrical and mechanical parameters. The Rubycon 450MXK470MEFCSN35X35 qualifies as an upgrade option due to its higher voltage rating (450 V) and extended operating temperature range (-25°C ~ 105°C).

Parameter Comparison

Engineering Selection Recommendations

Nichicon LLS2G471MELC is suitable for direct replacement in applications where the original Würth Elektronik 861221386021 specifications are required. This part maintains identical electrical ratings, thermal performance, and mechanical dimensions. Both components are ROHS3 compliant and carry Active product status, ensuring continued availability and regulatory compliance.

Rubycon 450MXK470MEFCSN35X35 is appropriate for applications requiring enhanced thermal performance or higher voltage margin. The 450 V rating provides 50 V additional headroom above the original 400 V specification. The extended operating temperature range (-25°C ~ 105°C) and higher temperature lifetime rating (3000 Hrs @ 105°C) support deployment in elevated ambient conditions. The seated height is identical to the original part at 1.457" (37.00 mm), ensuring PCB layout compatibility. This part is ROHS3 compliant and maintains Active product status.

Selection between direct equivalent and upgrade options depends on application thermal environment and voltage margin requirements. Both substitute parts maintain mechanical compatibility with the original through-hole snap-in mounting configuration and 10.00 mm lead spacing.

Frequently Asked Questions (FAQ)

Q: Can the Nichicon LLS2G471MELC replace the Würth Elektronik 861221386021 in existing designs?

A: Yes. The Nichicon LLS2G471MELC is a direct equivalent with matching capacitance (470 µF), voltage rating (400 V), tolerance (±20%), operating temperature range (-25°C ~ 85°C), and thermal lifetime (3000 Hrs @ 85°C). Mechanical compatibility is confirmed through identical lead spacing (10.00 mm), diameter (35.00 mm), and snap-in package configuration.

Q: What is the primary difference between the Nichicon and Rubycon options?

A: The Rubycon 450MXK470MEFCSN35X35 provides a higher voltage rating (450 V versus 400 V) and extended operating temperature capability (-25°C ~ 105°C versus -25°C ~ 85°C). The thermal lifetime rating is 3000 hours at 105°C, compared to 3000 hours at 85°C for both the original and Nichicon parts. All other electrical and mechanical parameters remain equivalent.

Q: Are there any height differences that affect PCB layout?

A: The Nichicon LLS2G471MELC has a maximum seated height of 1.378" (35.00 mm), which is 0.079" (2.00 mm) shorter than both the original Würth Elektronik part and the Rubycon upgrade at 1.457" (37.00 mm). This difference must be considered if vertical clearance is constrained. The Rubycon part maintains the original height specification.

Q: Do all substitute parts meet the same regulatory compliance standards?

A: Yes. The Nichicon LLS2G471MELC and Rubycon 450MXK470MEFCSN35X35 are both ROHS3 compliant and carry REACH Unaffected status, matching the regulatory profile of the original Würth Elektronik 861221386021.

Q: Which substitute should be selected for high-temperature applications?

A: The Rubycon 450MXK470MEFCSN35X35 is specified for applications requiring operation at temperatures up to 105°C, with a thermal lifetime rating of 3000 hours at that temperature. The original and Nichicon parts are rated to 85°C maximum.