UPJ1K331MHD Equivalent & Substitute Parts

Part Overview

The UPJ1K331MHD is a 330 µF, 80 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for general purpose applications with a 5000-hour lifetime at 105°C operating temperature. The part carries a "Not For New Designs" product status, indicating that Nichicon has discontinued active development for this series. Finding equivalent and substitute parts is necessary for ongoing maintenance, repair, and legacy system support where the UPJ series is specified.

Substiute Parts

UPJ1K331MHD

NichiconIn Stock: 1520UPJ1K331MHD Datasheet

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UPM1K331MHD

NichiconIn Stock: 1370UPM1K331MHD Datasheet

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UPM1K331MHD6

NichiconIn Stock: 1136UPM1K331MHD6 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the UPJ1K331MHD is determined by strict electrical and mechanical compatibility. The following parameters must remain constant or within acceptable tolerance:

• Capacitance value: 330 µF (exact match required)
• Voltage rating: 80 V (minimum, no downrating)
• Tolerance: ±20% (electrical specification match)
• Polarization: Polar (functional requirement)
• Operating temperature range: -55°C ~ 105°C (minimum coverage required)
• Lifetime rating: 5000 Hrs @ 105°C (performance baseline)
• Package type: Radial, Can (form factor requirement)
• Mounting type: Through Hole (PCB assembly compatibility)

Mechanical parameters including lead spacing, case diameter, and height determine physical fit on the PCB. Variations in these dimensions may require board redesign or mechanical adaptation.

The identified substitute parts UPM1K331MHD and UPM1K331MHD6 share the core electrical specifications with the main part. Both are manufactured by Nichicon and maintain the required capacitance, voltage rating, tolerance, and temperature range. Differences exist in ripple current ratings, impedance characteristics, and physical dimensions, which are documented in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

UPM1K331MHD is electrically and mechanically compatible with the UPJ1K331MHD for direct replacement in applications where lead spacing of 0.197" (5.00mm) and case diameter of 0.492" (12.50mm) are required. The UPM series carries AEC-Q200 automotive qualification, providing enhanced reliability documentation compared to the general-purpose UPJ series. Height variation of 0.019" (0.50mm) is within typical PCB assembly tolerances. This part is suitable for legacy system maintenance where automotive-grade performance is acceptable.

UPM1K331MHD6 shares identical electrical specifications but features different mechanical dimensions: lead spacing of 0.295" (7.50mm), case diameter of 0.630" (16.00mm), and reduced height of 1.063" (27.00mm). This part requires PCB layout modification to accommodate the larger lead spacing and case diameter. Selection of this variant is appropriate only when PCB redesign is feasible or when the larger package footprint aligns with existing board layout requirements.

Both substitute parts maintain ROHS3 compliance and the required operating temperature range. The UPM series components are rated for automotive applications under AEC-Q200 standard, providing additional qualification documentation for systems requiring enhanced traceability and reliability assurance.

Frequently Asked Questions (FAQ)

Q: Can UPM1K331MHD be used as a direct drop-in replacement for UPJ1K331MHD?

A: Yes. Both parts share identical capacitance (330 µF), voltage rating (80 V), tolerance (±20%), operating temperature range (-55°C ~ 105°C), and lead spacing (0.197" / 5.00mm). The height difference of 0.019" (0.50mm) is within standard PCB assembly tolerances and does not require board modification.

Q: What is the difference between UPM1K331MHD and UPM1K331MHD6?

A: Both parts have identical electrical specifications. The primary differences are mechanical: UPM1K331MHD6 has larger lead spacing (0.295" vs 0.197"), larger case diameter (0.630" vs 0.492"), and shorter height (1.063" vs 1.476"). These dimensional changes require PCB layout modification for UPM1K331MHD6 installation.

Q: Are the substitute parts suitable for general purpose applications?

A: The UPM series is rated for automotive applications under AEC-Q200 standard. While electrically compatible with general purpose requirements, these parts exceed the specification baseline of the original UPJ1K331MHD. They are suitable for any application requiring the specified electrical parameters.

Q: What is the impact of higher ripple current ratings in the UPM series?

A: The UPM1K331MHD and UPM1K331MHD6 have higher ripple current ratings (1.1 A @ 120 Hz and 1.44–1.45 A @ 10 kHz) compared to the UPJ1K331MHD (767 mA @ 120 Hz and 1 A @ 10 kHz). Higher ripple current capability indicates improved thermal performance and lower internal heating under AC stress. This is a beneficial characteristic for applications with elevated ripple current demands.

Q: Does impedance variation affect substitution compatibility?

A: The UPJ1K331MHD and UPM1K331MHD both have 88 mOhms impedance. The UPM1K331MHD6 has 99 mOhms impedance, a 12.5% increase. For most general purpose and automotive applications, this impedance variation is within acceptable tolerance. Applications with strict impedance requirements should confirm compatibility with circuit design specifications.

Q: What compliance certifications apply to these parts?

A: All three parts are ROHS3 compliant. The UPM series (UPM1K331MHD and UPM1K331MHD6) carry AEC-Q200 automotive qualification. The UPJ1K331MHD does not list automotive qualification. For systems requiring automotive-grade documentation and traceability, the UPM series is the appropriate selection.