Equivalent & Substitute Parts for KY25VB331M10X12LL

Part Overview

The KY25VB331M10X12LL is a 330 µF, 25 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KY series. This radial, through-hole component is rated for 7000 hours at 105°C and is designed for general-purpose applications. The part is currently active in production with 653 units in stock.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the allowed tolerances for this product category. Substitutes become necessary when the primary part reaches end-of-life status, inventory constraints occur, or design requirements mandate compliance with updated standards such as RoHS3.

Substiute Parts

KY25VB331M10X12LL

Chemi-ConIn Stock: 734KY25VB331M10X12LL Datasheet

Current PartRFQ

EKY-250ELL331MJC5S

Chemi-ConIn Stock: 12807EKY-250ELL331MJC5S Datasheet

UpgradeRFQ

UHE1E331MPD6

NichiconIn Stock: 25803UHE1E331MPD6 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KY25VB331M10X12LL is determined by strict equivalence across the following parameters:

Electrical Parameters (Must Match):

• Capacitance: 330 µF
• Voltage Rating: 25 V
• Tolerance: ±20%
• Lifetime: 7000 Hrs @ 105°C
• Operating Temperature: -40°C to 105°C
• Polarization: Polar
• Impedance: 80 mOhms

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package Type: Radial, Can
• Lead Spacing: 0.197" (5.00 mm)
• Diameter: 0.394" (10.00 mm)

Allowable Variations:

• Height - Seated (Max): Variation permitted within component envelope constraints
• RoHS Status: Substitutes may have improved compliance (RoHS3 compliant substitutes are acceptable upgrades)
• Product Status: Active or Not For New Designs status does not disqualify substitution based on electrical and mechanical equivalence

Two substitute parts meet these criteria and are grouped as follows:

Upgrade Substitute: EKY-250ELL331MJC5S (Chemi-Con) — Same manufacturer, improved RoHS3 compliance, increased inventory availability.

Parametric Equivalent: UHE1E331MPD6 (Nichicon) — Alternative manufacturer, equivalent electrical and mechanical specifications, RoHS3 compliant.

Parameter Comparison

Engineering Selection Recommendations

For Active Production Designs:

The EKY-250ELL331MJC5S is the primary substitute for the KY25VB331M10X12LL. Both parts are manufactured by Chemi-Con and maintain identical electrical specifications. The EKY-250ELL331MJC5S offers RoHS3 compliance, addressing regulatory requirements for new designs. The height difference of 0.059" (1.50 mm) must be verified against PCB layout constraints; however, this variation remains within standard component envelope tolerances for radial aluminum electrolytic capacitors. Inventory availability is significantly higher (12719 units versus 653 units).

For Legacy or Existing Designs:

The UHE1E331MPD6 (Nichicon) provides parametric equivalence with identical electrical performance and mechanical fit. This part is marked "Not For New Designs" but remains suitable for sustaining production or repair applications. The higher ripple current rating at 120 Hz (605.5 mA versus 432.5 mA) represents an operational advantage. RoHS3 compliance is achieved. Inventory availability is the highest among all options (25758 units).

Compliance Considerations:

The original KY25VB331M10X12LL is RoHS non-compliant. Both substitute parts achieve RoHS3 compliance, making them mandatory selections for designs subject to RoHS3 regulations. The UHE1E331MPD6 carries REACH Affected status, requiring verification against specific REACH substance restrictions in the application region.

Frequently Asked Questions (FAQ)

Q: Can the EKY-250ELL331MJC5S be used as a direct replacement for the KY25VB331M10X12LL?

A: Yes. Both parts are electrically and mechanically equivalent. The EKY-250ELL331MJC5S has a maximum seated height of 0.551" (14.00 mm) compared to 0.492" (12.50 mm) for the original part. PCB layout must accommodate this 0.059" (1.50 mm) height difference. All other parameters, including capacitance, voltage rating, tolerance, lifetime, operating temperature, impedance, lead spacing, and diameter, are identical.

Q: What is the difference between the two substitute parts?

A: Both EKY-250ELL331MJC5S and UHE1E331MPD6 meet electrical and mechanical substitution criteria. The primary differences are: (1) Manufacturer — Chemi-Con versus Nichicon; (2) Ripple Current @ 120 Hz — 432.5 mA versus 605.5 mA; (3) Product Status — Active versus Not For New Designs; (4) REACH Status — Unaffected versus Affected. The EKY-250ELL331MJC5S is preferred for new designs due to active product status. The UHE1E331MPD6 is suitable for sustaining production with higher ripple current capability.

Q: Are there any PCB layout considerations when substituting these parts?

A: Lead spacing (0.197" / 5.00 mm) and diameter (0.394" / 10.00 mm) are identical across all three parts, ensuring PCB footprint compatibility. The EKY-250ELL331MJC5S has a taller profile (0.551" maximum height versus 0.492" for the original). Verify that the PCB layout, component placement, and any mechanical constraints (enclosure height, adjacent components) accommodate this variation. The UHE1E331MPD6 maintains the original height specification.

Q: Which substitute should be selected for RoHS3 compliance?

A: Both EKY-250ELL331MJC5S and UHE1E331MPD6 are RoHS3 compliant. For new designs, the EKY-250ELL331MJC5S is the recommended choice due to its active product status and same-manufacturer sourcing. For applications where REACH compliance is critical, verify regional substance restrictions for the UHE1E331MPD6, which carries REACH Affected status.

Q: Can the UHE1E331MPD6 be used in new designs?

A: The UHE1E331MPD6 is marked "Not For New Designs." This designation indicates that Nichicon is not recommending this part for new product development. However, it remains electrically and mechanically equivalent and is suitable for sustaining production, repair, or legacy applications. For new designs, the EKY-250ELL331MJC5S is the appropriate selection.

Q: What does "Parametric Equivalent" mean for the UHE1E331MPD6?

A: "Parametric Equivalent" indicates that the UHE1E331MPD6 meets all electrical and mechanical substitution criteria established for this product category. It is manufactured by a different supplier (Nichicon) but delivers identical performance in the specified parameters: capacitance, voltage, tolerance, lifetime, operating temperature, impedance, lead spacing, and package dimensions. Functional compatibility is assured within the defined parameter set.