KZE50VB331M10X25LL Equivalent & Substitute Parts

Part Overview

The KZE50VB331M10X25LL is a 330 µF, 50 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KZE series. This radial, through-hole component is rated for 4000 hours at 105°C and is designed for general-purpose applications. The part is currently obsolete, necessitating identification of equivalent and substitute components that maintain functional compatibility while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	50 V
Tolerance	±20%
Lifetime @ 105°C	4000 Hrs
Operating Temperature Range	-40°C ~ 105°C
Mounting Type	Through Hole
Package Type	Radial, Can
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)
Polarization	Polar

Substitute Part Grouping Explanation

Substitution of the KZE50VB331M10X25LL is determined by the following critical parameters:

Primary Compatibility Criteria:

Capacitance: 330 µF (exact match required)
Voltage Rating: 50 V minimum (higher voltage ratings are acceptable)
Tolerance: ±20% (standard for aluminum electrolytic capacitors)
Mounting Type: Through Hole (radial configuration)
Lead Spacing: 0.197" (5.00 mm)
Case Diameter: 0.394" (10.00 mm)

Secondary Considerations:

Lifetime rating at 105°C (minimum 4000 hours)
Operating temperature range (-40°C ~ 105°C)
Impedance and ripple current characteristics
Height dimension (physical fit constraints)
RoHS and REACH compliance status

Substitute parts are grouped into two categories: direct equivalents (same voltage rating) and upgraded alternatives (higher voltage rating with enhanced specifications).

Parameter Comparison

Parameter	KZE50VB331M10X25LL	EKZE500ELL331MJ25S	50ZLH330MEFC10X23	63ZLH330MEFC10X23	EEU-FS1J331L	UHE1H331MPD
Manufacturer	Chemi-Con	Chemi-Con	Rubycon	Rubycon	Panasonic	Nichicon
Capacitance	330 µF	330 µF	330 µF	330 µF	330 µF	330 µF
Voltage Rating	50 V	50 V	50 V	63 V	63 V	50 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%
Lifetime @ 105°C	4000 Hrs	4000 Hrs	10000 Hrs	10000 Hrs	10000 Hrs	7000 Hrs
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Lead Spacing	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Height (Max)	0.984" (25.00 mm)	1.043" (26.50 mm)	0.984" (25.00 mm)	0.984" (25.00 mm)	1.004" (25.50 mm)	0.984" (25.00 mm)
Impedance	28 mOhms	28 mOhms	28 mOhms	69 mOhms	33 mOhms	55 mOhms
Ripple Current @ 120 Hz	935 mA	935 mA	1.029 A	775.5 mA	1.05 A	1.008 A
Ripple Current @ 100 kHz	1.87 A	1.87 A	1.87 A	1.41 A	1.5 A	1.44 A
Product Status	Obsolete	Active	Active	Active	Active	Not For New Designs
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Same Voltage Rating):

EKZE500ELL331MJ25S (Chemi-Con) is the primary direct equivalent. This part maintains the same manufacturer lineage, identical capacitance, voltage rating, and impedance characteristics. The part is active and ROHS3 compliant. Height dimension increases by 0.059" (1.50 mm), which must be verified against PCB layout constraints. This option is suitable for designs requiring minimal component change.

50ZLH330MEFC10X23 (Rubycon) provides equivalent electrical performance at the same 50 V rating with extended lifetime (10000 hours versus 4000 hours). Impedance and ripple current characteristics are identical. This part is ROHS3 compliant and active. Height dimension matches the original specification exactly. This option is recommended for applications requiring improved reliability margins.

UHE1H331MPD (Nichicon) operates at the same 50 V rating with 7000-hour lifetime rating. Product status is "Not For New Designs," indicating this part is in transition. ROHS3 compliance is confirmed. This option is acceptable for legacy system maintenance only.

Upgraded Alternative (Higher Voltage Rating):

63ZLH330MEFC10X23 (Rubycon) and EEU-FS1J331L (Panasonic) both operate at 63 V, providing voltage margin above the original 50 V specification. Both parts feature 10000-hour lifetime ratings and ROHS3 compliance. These options are suitable for applications where voltage headroom is beneficial. Note that impedance increases to 69 mOhms (Rubycon) and 33 mOhms (Panasonic), and ripple current ratings decrease accordingly.

Compliance Consideration:

The original KZE50VB331M10X25LL is RoHS non-compliant. All substitute parts listed are ROHS3 compliant, meeting current regulatory requirements for new designs and manufacturing.

Frequently Asked Questions (FAQ)

Q: Can I use a 63 V rated capacitor in place of the 50 V original?

A: Yes. A higher voltage rating is electrically compatible and provides additional safety margin. The 63 V parts (63ZLH330MEFC10X23 and EEU-FS1J331L) maintain the same capacitance and tolerance specifications. Verify that impedance and ripple current changes do not affect circuit performance.

Q: What is the significance of the lifetime rating difference between 4000 and 10000 hours at 105°C?

A: Lifetime rating indicates the expected operational duration at maximum rated temperature. The original part specifies 4000 hours; substitute parts with 10000-hour ratings provide extended service life under thermal stress. For applications operating continuously at elevated temperatures, the higher-rated parts offer improved reliability.

Q: Are all substitute parts physically interchangeable?

A: Lead spacing (0.197" / 5.00 mm) and case diameter (0.394" / 10.00 mm) are identical across all parts, ensuring PCB footprint compatibility. Height dimensions vary slightly: the original is 0.984" (25.00 mm); EKZE500ELL331MJ25S is 1.043" (26.50 mm); EEU-FS1J331L is 1.004" (25.50 mm). Verify clearance above the PCB before selecting parts with increased height.

Q: Why is UHE1H331MPD marked "Not For New Designs"?

A: This designation indicates the manufacturer is discontinuing the part for new applications. While suitable for legacy system repairs, new designs should select from active parts: EKZE500ELL331MJ25S, 50ZLH330MEFC10X23, 63ZLH330MEFC10X23, or EEU-FS1J331L.

Q: What does RoHS3 compliance mean for component selection?

A: ROHS3 compliance certifies that the component meets Restriction of Hazardous Substances regulations, restricting lead, cadmium, mercury, and other hazardous materials. The original KZE50VB331M10X25LL is non-compliant. All listed substitutes are ROHS3 compliant, meeting current manufacturing and environmental standards required for most commercial and industrial applications.

Q: How do impedance differences affect circuit performance?

A: Impedance (ESR equivalent series resistance) affects voltage ripple and transient response. The original part and direct equivalents (EKZE500ELL331MJ25S, 50ZLH330MEFC10X23) maintain 28 mOhms impedance. Higher-voltage alternatives show increased impedance (69 mOhms for 63ZLH330MEFC10X23). For noise-sensitive applications, verify that impedance changes remain within circuit tolerance specifications.

Q: Can I mix different substitute parts in the same design?

A: All listed parts share identical capacitance, voltage rating, tolerance, and lead spacing. Physical interchangeability is confirmed. However, impedance and ripple current variations require verification that mixed parts do not create performance inconsistencies in parallel or series configurations. Consult circuit design specifications before combining different manufacturers or voltage ratings.

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