Würth Elektronik 861021385017 Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 861021385017 is a 220 µF, 400 V aluminum electrolytic capacitor with radial, snap-in mounting. This component is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is currently active in production with 987 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to availability constraints, procurement lead times, or design flexibility needs.

Substiute Parts

861021385017

Würth ElektronikIn Stock: 1059861021385017 Datasheet

Current PartRFQ

400MXG220MEFCSN30X25

RubyconIn Stock: 1165400MXG220MEFCSN30X25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Würth Elektronik 861021385017 is based on strict electrical and mechanical parameter matching. The following criteria determine valid substitutes:

• Capacitance value: 220 µF (exact match required)
• Voltage rating: 400 V (exact match required)
• Tolerance: ±20% (exact match required)
• Mounting configuration: Through-hole, radial leads with snap-in case
• Physical dimensions: 30.00 mm diameter, 27.00 mm height maximum, 10.00 mm lead spacing
• Operating temperature range: -25°C to 105°C (minimum)
• Polarization: Polar (electrolytic)
• RoHS compliance: ROHS3 Compliant

The Rubycon 400MXG220MEFCSN30X25 meets all substitution criteria with identical electrical ratings and mechanical form factors.

Parameter Comparison

Engineering Selection Recommendations

Both the Würth Elektronik 861021385017 and Rubycon 400MXG220MEFCSN30X25 are active production components with ROHS3 compliance and REACH unaffected status. The Rubycon substitute offers extended thermal lifetime (3000 hours at 105°C versus 2000 hours), providing enhanced reliability in high-temperature operating conditions. Both components are suitable for direct substitution in through-hole PCB applications requiring 220 µF, 400 V aluminum electrolytic capacitors with snap-in mounting. Selection between these parts should be based on availability, procurement lead time, and thermal performance requirements specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the Rubycon 400MXG220MEFCSN30X25 be used as a direct replacement for the Würth Elektronik 861021385017?

A: Yes. Both components share identical electrical specifications (220 µF, 400 V, ±20% tolerance) and mechanical dimensions (30.00 mm diameter, 27.00 mm height, 10.00 mm lead spacing). The snap-in radial can package and through-hole mounting configuration are identical, allowing direct PCB substitution without layout modifications.

Q: What is the difference in thermal lifetime between these parts?

A: The Würth Elektronik part is rated for 2000 hours at 105°C, while the Rubycon substitute is rated for 3000 hours at 105°C. Both operate across the same temperature range (-25°C to 105°C). The extended lifetime of the Rubycon component provides additional margin in applications with sustained elevated-temperature operation.

Q: Are both parts RoHS compliant?

A: Yes. Both the Würth Elektronik 861021385017 and Rubycon 400MXG220MEFCSN30X25 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Do these capacitors have different ripple current ratings?

A: Yes. The Würth Elektronik part specifies 1.11 A at 120 Hz and 1.5318 A at 100 kHz. The Rubycon substitute specifies 1.25 A at 120 Hz and 1.75 A at 10 kHz. Both ratings are provided for reference; substitution is based on matching the primary electrical and mechanical parameters specified in the key parameters table.

Q: What packaging formats are available for these parts?

A: The Würth Elektronik 861021385017 is supplied in tray packaging, while the Rubycon 400MXG220MEFCSN30X25 is supplied in bulk packaging. Both use identical snap-in radial can form factors suitable for through-hole PCB assembly.