KXG450VB33RM18X20LL Equivalent & Substitute Parts

Part Overview

The KXG450VB33RM18X20LL is a 33 µF, 450 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KXG series. This radial, through-hole component is rated for 10,000 hours at 105°C and is designed for general-purpose applications requiring stable capacitance and ripple current handling.

The KXG450VB33RM18X20LL is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or repair requirements for systems utilizing this capacitor specification.

Key Parameters

Parameter	Value
Capacitance	33 µF
Voltage Rating	450 V
Tolerance	±20%
Lifetime @ Temperature	10,000 Hrs @ 105°C
Operating Temperature Range	-25°C to 105°C
Ripple Current @ 120 Hz	380 mA
Ripple Current @ 100 kHz	950 mA
Lead Spacing	0.295" (7.50 mm)
Diameter	0.709" (18.00 mm)
Height (Seated Max)	0.787" (20.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
Polarization	Polar

Substitute Part Grouping Explanation

Substitute parts for the KXG450VB33RM18X20LL are identified based on strict electrical and mechanical parameter matching within the aluminum electrolytic capacitor category. The substitution logic is based on the following criteria:

Primary Matching Parameters:

Capacitance: 33 µF (exact match required)
Voltage Rating: 450 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime: 10,000 Hrs @ 105°C (exact match required)
Operating Temperature Range: -25°C to 105°C (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)
Polarization: Polar (exact match required)

Secondary Mechanical Parameters:

Lead Spacing: 0.295" (7.50 mm) (exact match required)
Diameter: 0.709" (18.00 mm) (exact match required)

Ripple Current Specifications: Substitute parts must maintain ripple current ratings at both low frequency (120 Hz) and high frequency (100 kHz) to ensure equivalent performance in power supply and filtering applications.

Two substitute parts meet these criteria:

EKXG451ELL330MM20S (Chemi-Con, KXG series, Active status) – Parametric equivalent with identical electrical specifications and mechanical dimensions. RoHS3 compliant.
EEU-ED2W330S (Panasonic Electronic Components, ED-A series, Active status) – Similar manufacturer part with matching electrical specifications. Height dimension is 0.984" (25.00 mm), exceeding the original 0.787" (20.00 mm) maximum seated height. RoHS3 compliant.

Parameter Comparison

Parameter	KXG450VB33RM18X20LL	EKXG451ELL330MM20S	EEU-ED2W330S
Manufacturer	Chemi-Con	Chemi-Con	Panasonic Electronic Components
Series	KXG	KXG	ED-A
Product Status	Obsolete	Active	Active
Capacitance	33 µF	33 µF	33 µF
Voltage Rating	450 V	450 V	450 V
Tolerance	±20%	±20%	±20%
Lifetime @ Temperature	10,000 Hrs @ 105°C	10,000 Hrs @ 105°C	10,000 Hrs @ 105°C
Operating Temperature	-25°C to 105°C	-25°C to 105°C	-25°C to 105°C
Ripple Current @ 120 Hz	380 mA	380 mA	340 mA
Ripple Current @ 100 kHz	950 mA	950 mA	850 mA
Lead Spacing	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)
Diameter	0.709" (18.00 mm)	0.709" (18.00 mm)	0.709" (18.00 mm)
Height (Seated Max)	0.787" (20.00 mm)	0.787" (20.00 mm)	0.984" (25.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can
RoHS Status	Non-compliant	RoHS3 Compliant	RoHS3 Compliant

Engineering Selection Recommendations

EKXG451ELL330MM20S is the primary substitute for the KXG450VB33RM18X20LL. This part is manufactured by Chemi-Con in the same KXG series and maintains identical electrical and mechanical specifications. The component is currently in active production status, ensuring long-term availability. EKXG451ELL330MM20S is RoHS3 compliant, meeting modern environmental and regulatory requirements. The part can be directly substituted without design modifications or PCB layout changes.

EEU-ED2W330S is a secondary substitute manufactured by Panasonic Electronic Components. This part matches all electrical specifications and maintains the same lead spacing and diameter. However, the seated height is 0.984" (25.00 mm), which exceeds the original component's maximum seated height of 0.787" (20.00 mm). This dimensional difference requires verification of available vertical clearance on the PCB and within the enclosure before implementation. EEU-ED2W330S is RoHS3 compliant and in active production status.

Selection between these substitutes depends on physical space constraints within the application. If vertical clearance is limited to 20 mm or less, EKXG451ELL330MM20S is the appropriate choice. If additional height can be accommodated, EEU-ED2W330S provides an alternative from a different manufacturer, supporting supply chain diversification.

Frequently Asked Questions (FAQ)

Q: Can EKXG451ELL330MM20S be used as a direct replacement for KXG450VB33RM18X20LL?

A: Yes. EKXG451ELL330MM20S is a parametric equivalent with identical capacitance (33 µF), voltage rating (450 V), tolerance (±20%), lifetime (10,000 Hrs @ 105°C), operating temperature range (-25°C to 105°C), ripple current specifications, and mechanical dimensions. No design modifications are required.

Q: What is the key difference between EKXG451ELL330MM20S and EEU-ED2W330S?

A: Both parts match the electrical specifications of the original component. The primary difference is physical height: EKXG451ELL330MM20S maintains the original 0.787" (20.00 mm) seated height, while EEU-ED2W330S has a seated height of 0.984" (25.00 mm). This 0.197" (5.00 mm) height difference must be evaluated against available PCB clearance.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both EKXG451ELL330MM20S and EEU-ED2W330S are RoHS3 compliant. The original KXG450VB33RM18X20LL is RoHS non-compliant. Substitution with either alternative part upgrades the design to meet current environmental regulations.

Q: Do the substitute parts have the same ripple current ratings?

A: EKXG451ELL330MM20S maintains identical ripple current specifications: 380 mA @ 120 Hz and 950 mA @ 100 kHz. EEU-ED2W330S has slightly lower ripple current ratings: 340 mA @ 120 Hz and 850 mA @ 100 kHz. For applications requiring maximum ripple current handling, EKXG451ELL330MM20S is preferred.

Q: What is the product status of each substitute part?

A: EKXG451ELL330MM20S and EEU-ED2W330S are both in active production status, ensuring continued availability and supply chain stability. The original KXG450VB33RM18X20LL is obsolete.

Q: Can EEU-ED2W330S be used in space-constrained applications?

A: EEU-ED2W330S requires verification of vertical clearance due to its 0.984" (25.00 mm) seated height. If the PCB design or enclosure limits vertical space to 20 mm or less, this part cannot be used. EKXG451ELL330MM20S is the appropriate choice for space-constrained designs.

Q: Are there any differences in lead spacing or diameter between the substitute parts and the original?

A: No. All three parts maintain identical lead spacing (0.295" / 7.50 mm) and diameter (0.709" / 18.00 mm). PCB footprints and mounting holes require no modification when substituting either part.

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