EKZH250ELL331MHB5D Equivalent & Substitute Parts

Part Overview

The EKZH250ELL331MHB5D is a 330 µF, 25 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KZH series. This radial, through-hole component is rated for 6000 hours at 105°C and is designed for general-purpose applications requiring reliable energy storage and filtering. The part is ROHS3 compliant and currently active in production.

Substitute parts are necessary when the primary component experiences supply constraints, extended lead times, or when design requirements permit selection from alternative manufacturers offering equivalent electrical and mechanical characteristics within the same package envelope.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Tolerance	±20%	—
Voltage - Rated	25	V
Lifetime @ Temperature	6000	Hrs @ 105°C
Operating Temperature Range	-40 to 105	°C
Lead Spacing	0.138 (3.50)	" (mm)
Size / Dimension	0.315 Dia (8.00)	" Dia (mm)
Height - Seated (Max)	0.512 (13.00)	" (mm)
Mounting Type	Through Hole	—
Package / Case	Radial, Can	—
Polarization	Polar	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the EKZH250ELL331MHB5D is determined by strict equivalence across the following parameters:

Primary Substitution Criteria:

Capacitance: 330 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 25 V (exact match required)
Polarization: Polar (exact match required)
Lead Spacing: 0.138" (3.50 mm) (exact match required)
Size / Dimension: 0.315" Dia (8.00 mm) (exact match required)
Height - Seated (Max): 0.512" (13.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)

Secondary Considerations (Allowable Variation):

Lifetime @ Temperature: May vary from 6000 hours; extended lifetime ratings are acceptable
Ripple Current: May vary within application tolerance
Impedance: May vary within application tolerance
Manufacturer: Alternative manufacturers permitted if all primary criteria are met
RoHS Status: ROHS3 Compliant required

Substitute parts are organized into three categories: Direct Manufacturer Substitutes (same manufacturer, different series), Upgrade Substitutes (extended lifetime or improved performance), and Parametric Equivalents (alternative manufacturers with matching specifications).

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Lifetime @ 105°C (Hrs)	Impedance (mOhms)	Ripple Current @ 120 Hz (mA)	Ripple Current @ 100 kHz (mA)	Product Status
EKZH250ELL331MHB5D	Chemi-Con	KZH	330	25	6000	62	450	900	Active
EKZM250ELL331MHB5D	Chemi-Con	KZM	330	25	8000	56	472.5	945	Active
EKYB250ELL331MHB5D	Chemi-Con	KYB	330	25	7000	87	420	840	Active
25ZLH330MEFC8X11.5	Rubycon	ZLH	330	25	8000	56	519.75	945	Active
25YXJ330M8X11.5	Rubycon	YXJ	330	25	7000	130	448	—	Active
25ZLJ330M8X11.5	Rubycon	ZLJ	330	25	9000	75	660	1200	Active
ESL337M025AGMAA	KEMET	ESL	330	25	10000	61	482.5	965	Active
25ZLS330MEFC8X11.5	Rubycon	ZLS	330	25	6000	62	495	900	Active
EEU-FR1E331	Panasonic Electronic Components	FR-A	330	25	6000	56	665	950	Active
UHV1E331MPD	Nichicon	UHV	330	25	6000	59	495	990	Not For New Designs

Engineering Selection Recommendations

Direct Manufacturer Substitutes (Chemi-Con):

EKZM250ELL331MHB5D and EKYB250ELL331MHB5D are direct substitutes from the same manufacturer. Both maintain identical capacitance, voltage, tolerance, and package specifications. EKZM250ELL331MHB5D offers extended lifetime (8000 hours) with lower impedance (56 mOhms). EKYB250ELL331MHB5D provides 7000-hour lifetime with higher impedance (87 mOhms). Both are ROHS3 compliant and active in production.

Upgrade Substitutes (Extended Lifetime):

25ZLJ330M8X11.5 (Rubycon) and ESL337M025AGMAA (KEMET) provide extended operational lifetime at 105°C (9000 and 10000 hours respectively). Both maintain all primary electrical and mechanical parameters. ESL337M025AGMAA includes specified ESR of 61 mOhms @ 100 kHz. Both are ROHS3 compliant and active in production.

Parametric Equivalents (Same Specifications):

25ZLS330MEFC8X11.5 (Rubycon), EEU-FR1E331 (Panasonic), and UHV1E331MPD (Nichicon) match the 6000-hour lifetime specification. 25ZLS330MEFC8X11.5 and EEU-FR1E331 are ROHS3 compliant and active. UHV1E331MPD is marked "Not For New Designs" and has REACH Affected status; use only for legacy system maintenance.

Compliance Status:

All recommended active substitutes are ROHS3 compliant. UHV1E331MPD is REACH Affected and should not be selected for new designs.

Frequently Asked Questions (FAQ)

Q: Can EKZM250ELL331MHB5D replace EKZH250ELL331MHB5D in all applications?

A: Yes. EKZM250ELL331MHB5D maintains identical capacitance (330 µF), voltage rating (25 V), tolerance (±20%), and package dimensions. The extended lifetime (8000 vs. 6000 hours) and lower impedance (56 vs. 62 mOhms) represent performance improvements compatible with all applications designed for the original part.

Q: What is the difference between Direct Manufacturer Substitutes and Upgrade Substitutes?

A: Direct Manufacturer Substitutes are alternative series from the same manufacturer (Chemi-Con) with identical or similar lifetime ratings. Upgrade Substitutes offer extended lifetime at 105°C (9000 or 10000 hours) compared to the original 6000-hour specification, from alternative manufacturers. Both categories maintain all primary electrical and mechanical parameters.

Q: Is ESL337M025AGMAA suitable for applications requiring the EKZH250ELL331MHB5D?

A: Yes. ESL337M025AGMAA meets all primary substitution criteria: 330 µF capacitance, 25 V rating, ±20% tolerance, identical lead spacing (0.138"), identical can diameter (0.315"), and compatible height (0.531" vs. 0.512" maximum). The additional 0.019" height difference is within typical PCB layout tolerances. ESL337M025AGMAA provides 10000-hour lifetime and is ROHS3 compliant.

Q: Why is UHV1E331MPD marked "Not For New Designs"?

A: UHV1E331MPD is designated "Not For New Designs" by the manufacturer. This status indicates the part is in end-of-life phase. Use this part only for replacement in existing systems. For new designs, select from active parts: EKZM250ELL331MHB5D, 25ZLJ330M8X11.5, ESL337M025AGMAA, or EEU-FR1E331.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitutes except UHV1E331MPD are ROHS3 compliant. UHV1E331MPD is REACH Affected. For applications requiring ROHS3 compliance, select from: EKZM250ELL331MHB5D, EKYB250ELL331MHB5D, 25ZLH330MEFC8X11.5, 25YXJ330M8X11.5, 25ZLJ330M8X11.5, ESL337M025AGMAA, 25ZLS330MEFC8X11.5, or EEU-FR1E331.

Q: Can I use 25YXJ330M8X11.5 if ripple current specifications are critical?

A: 25YXJ330M8X11.5 specifies 448 mA ripple current @ 120 Hz. The original EKZH250ELL331MHB5D specifies 450 mA @ 120 Hz. This 2 mA difference is negligible. However, 25YXJ330M8X11.5 does not provide high-frequency ripple current data (@ 100 kHz). Verify application requirements before selection if high-frequency ripple current is a design constraint.

Q: What is the impact of impedance variation among substitutes?

A: Impedance values range from 56 mOhms (EKZM250ELL331MHB5D, 25ZLH330MEFC8X11.5) to 130 mOhms (25YXJ330M8X11.5). Lower impedance generally provides better high-frequency filtering and lower voltage ripple. Select based on application filtering requirements. For general-purpose applications, impedance variation within this range is typically acceptable.

Q: Is the height difference between ESL337M025AGMAA (0.531") and EKZH250ELL331MHB5D (0.512") significant?

A: The 0.019" (0.48 mm) height difference is within standard PCB layout tolerances and does not affect electrical performance. Verify physical clearance in the target application before substitution. This minor dimension variation does not disqualify ESL337M025AGMAA as a suitable replacement.

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