SLP271M420C9P3 Equivalent & Substitute Parts

Part Overview

The SLP271M420C9P3 is a 270 µF, 420 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in the SLP0712TE series. This radial, can-type snap-in capacitor is designed for general-purpose applications requiring high voltage energy storage and filtering. The part is Active status and ROHS3 compliant, with a rated lifetime of 3000 hours at 105°C. Substitute parts are identified when equivalent electrical and mechanical parameters are available from alternative manufacturers, enabling procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	270	µF	Critical - Must match exactly
Voltage - Rated	420	V	Critical - Minimum acceptable rating
Tolerance	±20%	-	Critical - Must match or be tighter
Polarization	Polar	-	Critical - Polarity requirement
Package / Case	Radial, Can - Snap-In	-	Critical - Physical form factor
Lead Spacing	0.394" (10.00mm)	-	Critical - PCB mounting compatibility
Size / Dimension	0.984" Dia (25.00mm)	-	Important - Enclosure fit
Height - Seated (Max)	2.047" (52.00mm)	-	Important - Vertical clearance
Mounting Type	Through Hole	-	Critical - Assembly method
Operating Temperature	-25°C ~ 105°C	-	Important - Environmental range
Lifetime @ Temp.	3000	Hrs @ 105°C	Important - Reliability specification
RoHS Status	ROHS3 Compliant	-	Important - Regulatory compliance

Substitute Part Grouping Explanation

Substitute parts for the SLP271M420C9P3 are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Same Voltage Rating - 420V): Direct substitutes maintain the 420 V rated voltage, 270 µF capacitance, ±20% tolerance, and radial snap-in package form factor. These parts are mechanically and electrically interchangeable with the main part. Variations in height and ESR characteristics are permitted within the allowed parameter ranges. Direct substitutes include:

420MXG270MEFCSN25X40 (Rubycon MXG series)
420VXH270MEFCSN25X40 (Rubycon VXH series)

Upgrade Substitutes (Higher Voltage Rating - 450V): Upgrade substitutes provide a higher rated voltage of 450 V while maintaining the same 270 µF capacitance, ±20% tolerance, and radial snap-in package. These parts are electrically compatible in applications designed for 420 V operation, as they provide additional voltage margin. Upgrade substitutes include:

EKMS451VSN271MQ50S (Chemi-Con KMS series)
LGN2W271MELA50 (Nichicon LGN series)

All substitute parts are ROHS3 compliant and rated for -25°C to 105°C operating temperature range.

Parameter Comparison

Parameter	SLP271M420C9P3 (CDE)	420MXG270MEFCSN25X40 (Rubycon)	420VXH270MEFCSN25X40 (Rubycon)	EKMS451VSN271MQ50S (Chemi-Con)	LGN2W271MELA50 (Nichicon)
Capacitance	270 µF	270 µF	270 µF	270 µF	270 µF
Tolerance	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	420 V	420 V	420 V	450 V	450 V
Polarization	Polar	Polar	Polar	Polar	Polar
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Size / Dimension	0.984" Dia (25.00mm)	0.984" Dia (25.00mm)	0.984" Dia (25.00mm)	1.000" Dia (25.40mm)	0.984" Dia (25.00mm)
Height - Seated (Max)	2.047" (52.00mm)	1.654" (42.00mm)	1.654" (42.00mm)	2.067" (52.50mm)	2.047" (52.00mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C
Lifetime @ Temp.	3000 Hrs @ 105°C	3000 Hrs @ 105°C	5000 Hrs @ 105°C	3000 Hrs @ 105°C	3000 Hrs @ 105°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Substitutes (420V Rating):

The 420MXG270MEFCSN25X40 (Rubycon MXG series) and 420VXH270MEFCSN25X40 (Rubycon VXH series) are electrically and mechanically equivalent to the SLP271M420C9P3. Both maintain the 420 V voltage rating and 270 µF capacitance specification. The 420VXH270MEFCSN25X40 offers extended lifetime of 5000 hours at 105°C compared to the standard 3000 hours, providing enhanced reliability for long-term operation. Both direct substitutes are ROHS3 compliant and suitable for direct replacement in existing designs without circuit modification.

Upgrade Substitutes (450V Rating):

The EKMS451VSN271MQ50S (Chemi-Con KMS series) and LGN2W271MELA50 (Nichicon LGN series) provide 450 V rated voltage while maintaining 270 µF capacitance and ±20% tolerance. These upgrade substitutes are electrically compatible in applications designed for 420 V operation and offer additional voltage safety margin. The LGN2W271MELA50 has significantly higher inventory availability (274,082 pcs) compared to other options. Both upgrade substitutes are ROHS3 compliant and suitable for applications where higher voltage rating is acceptable.

Physical Fit Considerations:

The 420MXG270MEFCSN25X40 and 420VXH270MEFCSN25X40 have reduced height (1.654" / 42.00mm) compared to the main part (2.047" / 52.00mm), providing improved vertical clearance in space-constrained designs. The EKMS451VSN271MQ50S has slightly increased diameter (1.000" / 25.40mm) and height (2.067" / 52.50mm), requiring verification of enclosure fit. The LGN2W271MELA50 maintains identical dimensions to the main part.

Frequently Asked Questions (FAQ)

Q: Can the 420MXG270MEFCSN25X40 or 420VXH270MEFCSN25X40 be used as direct replacements for the SLP271M420C9P3?

A: Yes. Both Rubycon direct substitutes maintain the same 420 V voltage rating, 270 µF capacitance, ±20% tolerance, and radial snap-in package form factor. The primary difference is reduced height (42.00mm vs. 52.00mm), which improves vertical clearance. The 420VXH270MEFCSN25X40 provides extended 5000-hour lifetime at 105°C compared to 3000 hours for the main part.

Q: What is the difference between direct substitutes and upgrade substitutes?

A: Direct substitutes (420MXG270MEFCSN25X40, 420VXH270MEFCSN25X40) maintain the same 420 V voltage rating as the main part. Upgrade substitutes (EKMS451VSN271MQ50S, LGN2W271MELA50) provide higher 450 V voltage rating while maintaining 270 µF capacitance. Upgrade substitutes are electrically compatible in 420 V applications and offer additional voltage margin.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the regulatory compliance status of the main part SLP271M420C9P3.

Q: Does the reduced height of the Rubycon substitutes affect circuit performance?

A: No. Height reduction does not affect electrical performance. The 420MXG270MEFCSN25X40 and 420VXH270MEFCSN25X40 maintain identical electrical specifications (capacitance, voltage, tolerance, ripple current ratings) and provide improved vertical clearance in enclosures.

Q: Can the 450V upgrade substitutes be used in place of the 420V main part?

A: Yes. The EKMS451VSN271MQ50S and LGN2W271MELA50 are electrically compatible in applications designed for 420 V operation. The higher 450 V rating provides additional voltage safety margin. Physical dimensions should be verified for enclosure fit, particularly the EKMS451VSN271MQ50S which has slightly increased diameter and height.

Q: What is the lead spacing requirement for all parts?

A: All parts, including the main part and all substitutes, have 0.394" (10.00mm) lead spacing, ensuring PCB mounting compatibility without modification.

Q: Which substitute offers the best long-term reliability?

A: The 420VXH270MEFCSN25X40 (Rubycon VXH series) offers extended 5000-hour lifetime at 105°C, compared to 3000 hours for the main part and other direct substitutes. This extended lifetime is suitable for applications requiring enhanced reliability over extended operational periods.

Q: Is inventory availability a consideration for part selection?

A: Yes. The LGN2W271MELA50 (Nichicon) has significantly higher inventory (274,082 pcs) compared to other substitutes, making it suitable for high-volume production requirements. The main part SLP271M420C9P3 has 991 pcs available.

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