UPT2D391MHD Equivalent & Substitute Parts

Part Overview

The UPT2D391MHD is a 390 µF, 200 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as Active product status and is designed for general purpose applications requiring reliable energy storage and filtering in power supply circuits. The UPT series offers a 5000-hour lifetime rating at 105°C operating temperature. Substitute parts become necessary when inventory constraints exist, when extended operational lifetime is required, or when enhanced ripple current handling capabilities are needed for specific circuit demands.

Substiute Parts

UPT2D391MHD

NichiconIn Stock: 1070UPT2D391MHD Datasheet

Current PartRFQ

UCY2D391MHD

NichiconIn Stock: 820UCY2D391MHD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The UCY2D391MHD qualifies as a direct substitute for the UPT2D391MHD based on the following critical parameters:

Electrical Equivalence:

• Identical capacitance value: 390 µF
• Identical voltage rating: 200 V
• Identical tolerance: ±20%
• Identical polarization: Polar

Mechanical Compatibility:

• Identical package type: Radial, Can
• Identical lead spacing: 0.295" (7.50 mm)
• Identical physical diameter: 0.709" (18.00 mm)
• Identical seated height: 1.634" (41.50 mm)
• Identical mounting type: Through Hole

Compliance Alignment:

• Both ROHS3 Compliant
• Both rated for general purpose applications

The UCY2D391MHD represents an enhanced variant within the same electrical and mechanical envelope, offering extended operational lifetime and improved ripple current performance.

Parameter Comparison

Engineering Selection Recommendations

Both the UPT2D391MHD and UCY2D391MHD are Active status products manufactured by Nichicon and maintain ROHS3 compliance. The UCY2D391MHD provides enhanced performance characteristics within the identical electrical and mechanical specification envelope. Selection between these parts should be based on application-specific requirements:

The UPT2D391MHD is suitable for applications where the 5000-hour lifetime at 105°C meets design specifications and ripple current demands do not exceed 1.13 A at 120 Hz or 1.808 A at 10 kHz.

The UCY2D391MHD is suitable for applications requiring extended operational lifetime (12000 hours at 105°C), extended lower temperature operation (-40°C minimum), or higher ripple current handling (1.78 A at 120 Hz, 4.66 A at 100 kHz).

Both parts are pin-compatible and board-compatible, requiring no circuit modifications for substitution.

Frequently Asked Questions (FAQ)

Q: Can UCY2D391MHD directly replace UPT2D391MHD on existing PCBs?

A: Yes. Both parts share identical lead spacing (0.295" / 7.50 mm), physical diameter (0.709" / 18.00 mm), and seated height (1.634" / 41.50 mm). No PCB layout modifications are required.

Q: What are the key differences between these two parts?

A: The UCY2D391MHD offers three primary enhancements: extended lifetime (12000 hours versus 5000 hours at 105°C), extended lower temperature operation (-40°C versus -25°C minimum), and significantly higher ripple current ratings (1.78 A at 120 Hz and 4.66 A at 100 kHz versus 1.13 A and 1.808 A respectively).

Q: Are both parts RoHS compliant?

A: Yes. Both UPT2D391MHD and UCY2D391MHD are ROHS3 Compliant.

Q: What determines substitution eligibility?

A: Substitution eligibility is determined by matching capacitance (390 µF), voltage rating (200 V), tolerance (±20%), package type (Radial, Can), lead spacing (0.295" / 7.50 mm), physical dimensions, mounting type (Through Hole), and polarization (Polar).

Q: Can UPT2D391MHD replace UCY2D391MHD?

A: Reverse substitution is not recommended. While electrically and mechanically compatible, the UPT2D391MHD provides lower ripple current ratings and shorter operational lifetime, which may not satisfy design requirements specified for the UCY2D391MHD.