EKMG250ELL331MHB5D Equivalent & Substitute Parts

Part Overview

The EKMG250ELL331MHB5D is a 330 µF, 25 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KMG series. This radial, through-hole component is rated for 1000 hours at 105°C and is designed for general-purpose applications. The part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Capacitance	330 µF
Tolerance	±20%
Voltage Rating	25 V
Lifetime @ 105°C	1000 Hrs
Operating Temperature Range	-55°C ~ 105°C
Polarization	Polar
Mounting Type	Through Hole
Package Type	Radial, Can
Lead Spacing	0.138" (3.50mm)
Case Diameter	0.315" (8.00mm)
Height	0.512" (13.00mm)
Ripple Current @ 120 Hz	310 mA
Ripple Current @ 100 kHz	465 mA
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the EKMG250ELL331MHB5D is determined by strict electrical and mechanical compatibility:

Electrical Parameters (Must Match):

Capacitance: 330 µF
Tolerance: ±20%
Voltage Rating: 25 V
Polarization: Polar
Operating Temperature Range: -55°C ~ 105°C

Mechanical Parameters (Must Match):

Mounting Type: Through Hole
Package Type: Radial, Can
Lead Spacing: 0.138" (3.50mm) or 0.197" (5.00mm) for larger case variants
Case Diameter: 0.315" (8.00mm) or 0.394" (10.00mm) for larger case variants
Height: Compatible with PCB layout constraints

Performance Parameters (May Vary):

Lifetime @ 105°C: 1000 Hrs (minimum acceptable) to 5000 Hrs (enhanced reliability)
Ripple Current: Equal or greater capacity acceptable
Impedance: Lower values indicate improved performance

Substitutes are grouped by series (Chemi-Con LXY, LXZ; Panasonic NHG-A; Nichicon UKA, UPA) and by application suitability (General Purpose vs. Automotive).

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Lifetime @ 105°C	Lead Spacing	Case Dia	Height	Ripple Current @ 120 Hz	Ripple Current @ 100 kHz	Status	Application
EKMG250ELL331MHB5D	Chemi-Con	KMG	330 µF	25 V	1000 Hrs	0.138" (3.50mm)	0.315" (8.00mm)	0.512" (13.00mm)	310 mA	465 mA	Discontinued	General Purpose
ELXY250ELL331MH20D	Chemi-Con	LXY	330 µF	25 V	3000 Hrs	0.138" (3.50mm)	0.315" (8.00mm)	0.846" (21.50mm)	370 mA	740 mA	Active	Automotive
ELXY250ELL331MJ16S	Chemi-Con	LXY	330 µF	25 V	5000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.689" (17.50mm)	412.5 mA	825 mA	Active	Automotive
ELXZ250ELL331MH15D	Chemi-Con	LXZ	330 µF	25 V	3000 Hrs	0.138" (3.50mm)	0.315" (8.00mm)	0.591" (15.00mm)	365 mA	730 mA	Active	Automotive
ELXZ250ELL331MJC5S	Chemi-Con	LXZ	330 µF	25 V	5000 Hrs	0.197" (5.00mm)	0.394" (10.00mm)	0.551" (14.00mm)	380 mA	760 mA	Active	Automotive
EKMQ250ELL331MHB5D	Chemi-Con	KMQ	330 µF	25 V	1000 Hrs	0.138" (3.50mm)	0.315" (8.00mm)	0.512" (13.00mm)	310 mA	465 mA	Active	General Purpose
ECA-1EHG331	Panasonic	NHG-A	330 µF	25 V	1000 Hrs	0.138" (3.50mm)	0.315" (8.00mm)	0.492" (12.50mm)	310 mA	465 mA	Active	General Purpose
ECA-1EHG331B	Panasonic	NHG-A	330 µF	25 V	1000 Hrs	0.197" (5.00mm)	0.315" (8.00mm)	0.492" (12.50mm)	310 mA	465 mA	Active	General Purpose
ECA-1EHG331BJ	Panasonic	NHG-A	330 µF	25 V	1000 Hrs	0.138" (3.50mm)	0.315" (8.00mm)	0.492" (12.50mm)	310 mA	465 mA	Active	Automotive
UKA1E331MPD	Nichicon	UKA	330 µF	25 V	2000 Hrs	0.138" (3.50mm)	0.315" (8.00mm)	0.512" (13.00mm)	290 mA	435 mA @ 10 kHz	Not For New Designs	Audio
UPA1E331MPD	Nichicon	UPA	330 µF	25 V	3000 Hrs	0.138" (3.50mm)	0.315" (8.00mm)	0.512" (13.00mm)	409.5 mA	Not specified	Active	General Purpose

Engineering Selection Recommendations

Direct Replacement (Same Footprint, Same Lifetime):

EKMQ250ELL331MHB5D (Chemi-Con KMQ series): Identical electrical and mechanical specifications to the original part. Active product status ensures ongoing availability. Suitable for general-purpose applications requiring 1000-hour lifetime at 105°C.
ECA-1EHG331 (Panasonic NHG-A series): Equivalent performance with slightly reduced height (0.492" vs. 0.512"). Active status with high inventory availability. Suitable for general-purpose applications.

Enhanced Reliability Substitutes (Increased Lifetime):

ELXY250ELL331MH20D (Chemi-Con LXY series): 3000-hour lifetime at 105°C with improved ripple current handling (370 mA @ 120 Hz, 740 mA @ 100 kHz). Automotive-rated (AEC-Q200). Increased height (0.846") requires PCB layout verification.
ELXZ250ELL331MH15D (Chemi-Con LXZ series): 3000-hour lifetime at 105°C with automotive qualification. Compact height (0.591") maintains similar form factor. Impedance specification (90 mOhms) indicates superior performance.
UPA1E331MPD (Nichicon UPA series): 3000-hour lifetime with significantly higher ripple current capacity (409.5 mA @ 120 Hz). Active product status. Identical footprint to original part.

Extended Lifetime Substitutes (5000-Hour Rating):

ELXY250ELL331MJ16S (Chemi-Con LXY series): 5000-hour lifetime with automotive qualification. Larger case (0.394" diameter, 0.197" lead spacing) requires PCB redesign. Superior ripple current performance (412.5 mA @ 120 Hz, 825 mA @ 100 kHz).
ELXZ250ELL331MJC5S (Chemi-Con LXZ series): 5000-hour lifetime with automotive qualification. Larger case footprint (0.394" diameter, 0.197" lead spacing). Impedance specification (90 mOhms) indicates optimized performance.

Automotive Applications:

ECA-1EHG331BJ (Panasonic NHG-A series): AEC-Q200 rated for automotive use. Identical footprint to original part (0.138" lead spacing, 0.315" diameter). 1000-hour lifetime. Active status with substantial inventory.

Not Recommended for New Designs:

UKA1E331MPD (Nichicon UKA series): Product status is "Not For New Designs." Use only for legacy system maintenance or repair.

Frequently Asked Questions (FAQ)

Q: Can I use ELXY250ELL331MH20D as a direct replacement for EKMG250ELL331MHB5D?

A: Electrically yes, mechanically requires verification. Both parts share identical capacitance (330 µF), voltage rating (25 V), lead spacing (0.138"), and case diameter (0.315"). However, ELXY250ELL331MH20D has increased height (0.846" vs. 0.512"), which may conflict with PCB layout constraints or component clearances. Verify available vertical space before substitution.

Q: What is the difference between the Chemi-Con LXY and LXZ series?

A: Both series meet automotive qualification (AEC-Q200) and offer enhanced lifetime ratings (3000 or 5000 hours at 105°C). The primary differences are case dimensions and ripple current specifications. LXY series parts typically feature larger case diameters (0.394") with higher ripple current capacity. LXZ series parts offer more compact heights while maintaining automotive compliance. Selection depends on PCB layout constraints and thermal performance requirements.

Q: Why do some substitutes have different lead spacing (0.197" vs. 0.138")?

A: Lead spacing is determined by case diameter. Larger case diameters (0.394") accommodate higher capacitance density and improved thermal performance, requiring 0.197" lead spacing. Smaller cases (0.315") use 0.138" spacing. Lead spacing directly affects PCB pad layout and cannot be changed without PCB redesign. Verify PCB footprint compatibility before selecting a substitute with different lead spacing.

Q: Is the Panasonic ECA-1EHG331BJ suitable for automotive applications?

A: Yes. ECA-1EHG331BJ carries AEC-Q200 automotive qualification rating. It shares identical electrical specifications with the original part (330 µF, 25 V, 1000-hour lifetime) and maintains the same footprint (0.138" lead spacing, 0.315" diameter). Active product status ensures availability for automotive designs.

Q: What does "Not For New Designs" mean for UKA1E331MPD?

A: This product status indicates the manufacturer has discontinued active development and recommends against using this part in new circuit designs. UKA1E331MPD should be used only for maintenance, repair, or legacy system support where the original part specification is mandatory. For new designs, select from active-status alternatives such as UPA1E331MPD or Chemi-Con LXY/LXZ series parts.

Q: How do I choose between 1000-hour and 3000-hour lifetime parts?

A: Lifetime rating reflects expected operational hours at maximum rated temperature (105°C). Select based on application requirements: general-purpose consumer electronics typically use 1000-hour parts; industrial, automotive, and reliability-critical applications benefit from 3000 or 5000-hour ratings. Higher lifetime ratings provide design margin for thermal stress and extended product life cycles.

Q: Can I substitute a part with higher ripple current rating?

A: Yes. Higher ripple current capacity indicates improved thermal performance and lower ESR. Substituting with a higher-rated part maintains or improves circuit reliability. The reverse substitution (lower ripple current) is not acceptable and may cause premature capacitor failure due to excessive internal heating.

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