4MS533MEFC4X5 Equivalent & Substitute Parts

Part Overview

The Rubycon 4MS533MEFC4X5 is a 33 µF, 4 V aluminum electrolytic capacitor in radial, can package with a rated lifetime of 1000 hours at 85°C. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The MS5 series capacitor is designed for general-purpose applications requiring compact form factors and standard radial lead spacing.

Key Parameters

Parameter	Value
Capacitance	33 µF
Voltage Rating	4 V
Tolerance	±20%
Lifetime @ Temperature	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Lead Spacing	0.059" (1.50 mm)
Case Diameter	0.157" (4.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can

Substitute Part Grouping Explanation

Substitution for the 4MS533MEFC4X5 is based on the following critical parameters that must remain constant or be upgraded:

Capacitance Value: 33 µF (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.059" (1.50 mm) (exact match required)
Case Diameter: 0.157" (4.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)
Polarization: Polar (exact match required)
Operating Temperature Range: -40°C ~ 85°C (exact match required)
Lifetime @ Temperature: 1000 Hrs @ 85°C (exact match required)

Voltage Rating Substitution Logic: The rated voltage of substitute parts may be equal to or greater than the original 4 V specification. Higher voltage ratings provide improved safety margins and are electrically compatible in circuits designed for 4 V operation.

Parameter Comparison

Parameter	4MS533MEFC4X5 (Rubycon)	ECE-A0JKA330 (Panasonic)	ECE-A1AKA330 (Panasonic)
Manufacturer	Rubycon	Panasonic Electronic Components	Panasonic Electronic Components
Capacitance	33 µF	33 µF	33 µF
Voltage Rating	4 V	6.3 V	10 V
Tolerance	±20%	±20%	±20%
Lifetime @ Temperature	1000 Hrs @ 85°C	1000 Hrs @ 85°C	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Polarization	Polar	Polar	Polar
Lead Spacing	0.059" (1.50 mm)	0.059" (1.50 mm)	0.059" (1.50 mm)
Case Diameter	0.157" (4.00 mm)	0.157" (4.00 mm)	0.157" (4.00 mm)
Height - Seated (Max)	0.256" (6.50 mm)	0.276" (7.00 mm)	0.276" (7.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Both Panasonic substitute parts (ECE-A0JKA330 and ECE-A1AKA330) are active products with full RoHS3 compliance and REACH unaffected status, providing long-term availability and regulatory compliance advantages over the obsolete Rubycon 4MS533MEFC4X5.

ECE-A0JKA330 provides a voltage upgrade to 6.3 V while maintaining all other critical parameters. This part is suitable for direct substitution where the circuit voltage specification permits operation at 6.3 V.

ECE-A1AKA330 provides a voltage upgrade to 10 V while maintaining all other critical parameters. This part is suitable for direct substitution where the circuit voltage specification permits operation at 10 V and where additional voltage margin is required.

Both substitute parts exhibit slightly increased seated height (0.276" versus 0.256"), which must be verified for PCB layout compatibility. All other mechanical and electrical parameters remain compatible with the original design.

Frequently Asked Questions (FAQ)

Q: Can ECE-A0JKA330 or ECE-A1AKA330 be used as direct replacements for 4MS533MEFC4X5?

A: Yes, both parts are direct substitutes provided the circuit design permits operation at the higher voltage ratings (6.3 V or 10 V respectively). The capacitance, tolerance, lead spacing, case diameter, and mounting type are identical. The increased seated height must be verified against PCB layout constraints.

Q: What is the difference between ECE-A0JKA330 and ECE-A1AKA330?

A: Both parts are Panasonic KA series aluminum electrolytic capacitors with identical capacitance (33 µF), tolerance (±20%), and physical dimensions. The primary difference is the voltage rating: ECE-A0JKA330 is rated at 6.3 V, while ECE-A1AKA330 is rated at 10 V. Selection depends on the circuit voltage requirement and desired safety margin.

Q: Are there any height restrictions when substituting these parts?

A: The substitute parts have a maximum seated height of 0.276" (7.00 mm) compared to the original 0.256" (6.50 mm). This 0.020" (0.50 mm) increase must be verified against PCB layout and enclosure clearance requirements before implementation.

Q: Do the substitute parts meet the same compliance standards?

A: Yes, both ECE-A0JKA330 and ECE-A1AKA330 are ROHS3 compliant and REACH unaffected, matching the compliance status of the original 4MS533MEFC4X5.

Q: What is the ripple current capability of the substitute parts?

A: ECE-A0JKA330 supports 64.6 mA ripple current at 10 kHz. ECE-A1AKA330 supports 73.1 mA ripple current at 10 kHz, providing higher ripple current capacity than the original part's 40.5 mA at 10 kHz.

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