UHW1J331MPD Equivalent & Substitute Parts

Part Overview

The UHW1J331MPD is a 330 µF, 63 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as Not For New Designs, indicating it has been superseded in Nichicon's product portfolio. The UHW series represents legacy technology, making identification of compatible substitute parts essential for maintenance, repair, and legacy system support applications where continued supply of the original part may be limited.

Substiute Parts

UHW1J331MPD

NichiconIn Stock: 1846UHW1J331MPD Datasheet

Current PartRFQ

EKZN630ELL331MJ25S

Chemi-ConIn Stock: 741EKZN630ELL331MJ25S Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UHW1J331MPD is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 330 µF (exact match required)
• Voltage Rating: 63 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime Specification: 10000 Hrs @ 105°C (exact match required)
• Operating Temperature Range: -40°C ~ 105°C (exact match required)
• Physical Dimensions: Lead spacing 5.00 mm, case diameter 10.00 mm, height 26.50 mm (exact match required for PCB compatibility)
• Mounting Configuration: Through Hole Radial (exact match required)
• Polarization: Polar (exact match required)
• RoHS & Compliance Status: ROHS3 Compliant, REACH Unaffected (required for regulatory alignment)

The EKZN630ELL331MJ25S from Chemi-Con meets all substitution criteria and is classified as Active product status, providing improved long-term availability compared to the legacy UHW series.

Parameter Comparison

Engineering Selection Recommendations

The EKZN630ELL331MJ25S is the qualified substitute for the UHW1J331MPD based on the following engineering criteria:

Product Status Alignment: The UHW1J331MPD carries Not For New Designs status, indicating end-of-life classification. The EKZN630ELL331MJ25S maintains Active product status, ensuring continued manufacturing support and supply chain stability.

Electrical Equivalence: Both parts maintain identical capacitance, voltage rating, tolerance, and thermal lifetime specifications. The substitute exhibits lower impedance (37 mOhms versus 72 mOhms), which represents an improvement in high-frequency performance characteristics without compromising circuit compatibility.

Physical Compatibility: Identical lead spacing, case diameter, and seated height ensure direct PCB footprint compatibility without layout modifications.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the EKZN630ELL331MJ25S be used as a direct replacement for the UHW1J331MPD?

A: Yes. The substitute part meets all critical electrical and mechanical parameters. Identical lead spacing (5.00 mm), case diameter (10.00 mm), and height (26.50 mm) enable direct PCB mounting without modification. Electrical specifications including capacitance, voltage rating, tolerance, and thermal lifetime are equivalent.

Q: What is the significance of the lower impedance in the substitute part?

A: The EKZN630ELL331MJ25S exhibits 37 mOhms impedance compared to 72 mOhms in the original part. Lower impedance improves high-frequency ripple current handling and reduces voltage drop under transient conditions. This represents a performance enhancement and does not create compatibility issues in legacy circuit designs.

Q: Why is the UHW1J331MPD classified as Not For New Designs?

A: This classification indicates the part has been superseded in the manufacturer's product portfolio. Nichicon has transitioned to newer capacitor series with improved performance characteristics or manufacturing processes. For new circuit designs, the EKZN630ELL331MJ25S or equivalent active-status alternatives should be specified.

Q: Are there any thermal or environmental differences between these parts?

A: No. Both parts maintain identical operating temperature range (-40°C ~ 105°C) and thermal lifetime specification (10000 Hrs @ 105°C). Environmental compliance status is equivalent: both are ROHS3 compliant and REACH unaffected.

Q: What inventory considerations apply to these parts?

A: The UHW1J331MPD has 1783 pieces in stock, while the EKZN630ELL331MJ25S has 693 pieces available. For applications requiring immediate supply, the original part may offer shorter lead times. For long-term projects, the active-status substitute ensures continued availability beyond current inventory levels.