SLP271M450E7P3 Equivalent & Substitute Parts Reference

Part Overview

The SLP271M450E7P3 is a 270 µF, 450 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can snap-in package. This component is classified as Active product status and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part operates across a temperature range of -25°C to 105°C with a rated lifetime of 3000 hours at 105°C.

Equivalent and substitute parts are identified when design requirements, supply constraints, or application-specific performance criteria necessitate alternative component selection while maintaining electrical and mechanical compatibility within the specified parameter tolerances.

Key Parameters

Parameter	Value	Unit	Significance for Substitution
Capacitance	270	µF	Primary electrical specification; must match exactly
Voltage - Rated	450	V	Primary electrical specification; must match exactly
Tolerance	±20%	-	Acceptable capacitance variation; must match or be tighter
Operating Temperature Range	-25°C to 105°C	°C	Defines thermal operating envelope
Lifetime @ Temperature	3000	Hrs @ 105°C	Reliability specification; equal or greater acceptable
Package / Case	Radial, Can - Snap-In	-	Mechanical compatibility; must match for direct substitution
Lead Spacing	0.394" (10.00mm)	-	PCB footprint compatibility; must match
Size / Dimension	1.181" Dia (30.00mm)	-	Physical envelope; must fit within design constraints
Height - Seated (Max)	1.654" (42.00mm)	-	Vertical clearance requirement; equal or less acceptable
Mounting Type	Through Hole	-	Assembly method; must match
RoHS Status	ROHS3 Compliant	-	Regulatory compliance; must maintain or exceed

Substitute Part Grouping Explanation

Substitute parts for the SLP271M450E7P3 are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Matching Criteria (Non-Negotiable):

Capacitance: 270 µF (exact match)
Voltage Rating: 450 V (exact match)
Tolerance: ±20% (equal or tighter)
Package Type: Radial, Can - Snap-In (exact match)
Lead Spacing: 0.394" (10.00mm) (exact match)
Diameter: 1.181" (30.00mm) (exact match)
Mounting Type: Through Hole (exact match)

Secondary Compatibility Parameters:

Operating Temperature Range: -25°C to 105°C (must encompass or equal)
Height - Seated (Max): Equal to or less than 1.654" (42.00mm)
Lifetime @ 105°C: Equal to or greater than 3000 hours

Regulatory Compliance:

RoHS3 Compliant status maintained across all substitutes
REACH Unaffected status maintained

Substitutes are grouped by manufacturer and series designation. All identified substitutes meet the primary matching criteria and maintain regulatory compliance. Differences in ESR (Equivalent Series Resistance) and ripple current ratings reflect design variations within the same electrical class and do not preclude substitution when the primary parameters align.

Parameter Comparison

Parameter	SLP271M450E7P3 (CDE)	381LR271M450K042 (CDE)	450MXK270MEFCSN30X30 (Rubycon)	450VXG270MEFCSN30X35 (Rubycon)	450VXH270MEFCSN30X30 (Rubycon)	LGW2W271MELB40 (Nichicon)	LGX2W271MELB40 (Nichicon)
Capacitance	270 µF	270 µF	270 µF	270 µF	270 µF	270 µF	270 µF
Voltage - Rated	450 V	450 V	450 V	450 V	450 V	450 V	450 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C
Lifetime @ 105°C	3000 Hrs	3000 Hrs	3000 Hrs	5000 Hrs	5000 Hrs	3000 Hrs	5000 Hrs
Lead Spacing	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Size / Dimension	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)
Height - Seated (Max)	1.654" (42.00mm)	1.654" (42.00mm)	1.260" (32.00mm)	1.457" (37.00mm)	1.260" (32.00mm)	1.575" (40.00mm)	1.654" (42.00mm)
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All identified substitute parts maintain full electrical and mechanical compatibility with the SLP271M450E7P3 based on the primary matching criteria. Selection among substitutes is determined by application-specific requirements and availability:

381LR271M450K042 (Cornell Dubilier Electronics): Parametric equivalent from the same manufacturer. Maintains identical electrical specifications and package dimensions. Suitable for direct replacement in applications where manufacturer consistency is required. Product status: Active.

450MXK270MEFCSN30X30 (Rubycon MXK Series): Direct manufacturer equivalent with reduced height (1.260" vs. 1.654"), providing space optimization in height-constrained designs. Lifetime rating of 3000 hours at 105°C matches the original specification. Product status: Active. RoHS3 Compliant.

450VXG270MEFCSN30X35 (Rubycon VXG Series): Extended lifetime rating of 5000 hours at 105°C provides enhanced reliability margin. Height of 1.457" offers moderate space savings. Highest inventory availability (1,000,199 units). Product status: Active. RoHS3 Compliant.

450VXH270MEFCSN30X30 (Rubycon VXH Series): Extended lifetime rating of 5000 hours at 105°C with compact height of 1.260". Combines reliability enhancement with space optimization. Product status: Active. RoHS3 Compliant.

LGW2W271MELB40 (Nichicon LGW Series): Maintains 3000-hour lifetime specification with height of 1.575". Highest inventory availability among Nichicon options (273,982 units). Product status: Active. RoHS3 Compliant.

LGX2W271MELB40 (Nichicon LGX Series): Extended lifetime rating of 5000 hours at 105°C. Height matches original specification at 1.654". Product status: Active. RoHS3 Compliant.

All substitutes maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can the 381LR271M450K042 be used as a direct replacement for the SLP271M450E7P3?

A: Yes. The 381LR271M450K042 is a parametric equivalent from Cornell Dubilier Electronics with identical capacitance (270 µF), voltage rating (450 V), tolerance (±20%), package type (Radial, Can - Snap-In), lead spacing (10.00mm), diameter (30.00mm), and height (42.00mm). All electrical and mechanical parameters align with the original specification.

Q: What is the difference between the 3000-hour and 5000-hour lifetime ratings?

A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C) before capacitance degradation reaches specified limits. A 5000-hour rating provides extended service life compared to 3000 hours. Selection depends on application duty cycle and required component longevity. Both ratings are acceptable substitutes when the original specification calls for 3000 hours.

Q: Are the Rubycon substitutes (450MXK270MEFCSN30X30, 450VXG270MEFCSN30X35, 450VXH270MEFCSN30X30) mechanically compatible with the original design?

A: Yes, all Rubycon substitutes maintain the required electrical specifications and package compatibility. However, height variations exist: 450MXK270MEFCSN30X30 and 450VXH270MEFCSN30X30 are 1.260" (32.00mm) tall, while 450VXG270MEFCSN30X35 is 1.457" (37.00mm) tall. Both are shorter than the original 1.654" (42.00mm), providing space optimization. Verify PCB layout clearance before substitution.

Q: Can Nichicon parts (LGW2W271MELB40, LGX2W271MELB40) replace the CDE original?

A: Yes. Both Nichicon substitutes meet all primary electrical and mechanical matching criteria: 270 µF capacitance, 450 V rating, ±20% tolerance, radial snap-in package, 10.00mm lead spacing, and 30.00mm diameter. LGW2W271MELB40 maintains 3000-hour lifetime; LGX2W271MELB40 provides 5000-hour lifetime. Height specifications are 1.575" (40.00mm) and 1.654" (42.00mm) respectively.

Q: What does "Radial, Can - Snap-In" package mean for substitution purposes?

A: This designation specifies both the electrical connection method (radial leads) and the mechanical mounting interface (snap-in can). All identified substitutes use identical package architecture, ensuring compatibility with PCB footprints, lead spacing, and snap-in mounting fixtures designed for the original SLP271M450E7P3.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All identified substitute parts maintain ROHS3 Compliant status and REACH Unaffected status, matching the regulatory compliance profile of the original SLP271M450E7P3.

Q: Which substitute offers the best space optimization?

A: The 450MXK270MEFCSN30X30 and 450VXH270MEFCSN30X30 both provide the most compact height at 1.260" (32.00mm), representing a 0.394" (10.00mm) reduction compared to the original 1.654" (42.00mm). Selection between these two depends on lifetime requirements: 450MXK provides 3000 hours; 450VXH provides 5000 hours.

Q: What inventory considerations apply to these substitutes?

A: Inventory availability varies significantly. The 450VXG270MEFCSN30X35 offers the highest availability at 1,000,199 units. Nichicon options (LGW2W271MELB40 and LGX2W271MELB40) provide 273,982 and 274,082 units respectively. CDE options (SLP271M450E7P3 and 381LR271M450K042) offer 941 and 4,813 units. Rubycon 450VXH270MEFCSN30X30 provides 1,659 units. Availability should be confirmed with component suppliers for production requirements.

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