LPX271M400E5P3 Equivalent & Substitute Parts

Part Overview

The LPX271M400E5P3 is a 270 µF, 400 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, can snap-in package. This component is designed for general-purpose applications requiring through-hole mounting with a 10.00 mm lead spacing and 30.00 mm diameter form factor.

The LPX271M400E5P3 maintains Active product status. Substitute parts become necessary when inventory availability is limited, when design requirements permit alternative manufacturers, or when performance improvements in specific parameters are beneficial to system reliability.

Substiute Parts

LPX271M400E5P3

Cornell Dubilier Electronics (CDE)In Stock: 755LPX271M400E5P3 Datasheet

Current PartRFQ

B43501A9277M000

EPCOS - TDK ElectronicsIn Stock: 273966B43501A9277M000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LPX271M400E5P3 is determined by strict equivalence in the following parameters:

Critical Matching Parameters:

• Capacitance: 270 µF (exact match required)
• Voltage Rating: 400 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lead Spacing: 10.00 mm (exact match required)
• Package Type: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Polarization: Polar (exact match required)

Allowable Variation Parameters:

• ESR (Equivalent Series Resistance): May vary based on frequency measurement conditions
• Lifetime @ Temperature: May exceed the original specification
• Height - Seated (Max): Minor variations permitted within mechanical envelope constraints
• Ripple Current: May vary based on frequency measurement conditions

The substitute part B43501A9277M000 from EPCOS - TDK Electronics satisfies all critical matching parameters and is therefore a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

LPX271M400E5P3 (Cornell Dubilier Electronics)

The LPX271M400E5P3 maintains Active product status and is suitable for new designs. This part is the primary selection when CDE inventory and supply chain continuity are available. The component is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

B43501A9277M000 (EPCOS - TDK Electronics)

The B43501A9277M000 is designated as Not For New Designs by the manufacturer. This part is functionally equivalent in all critical electrical and mechanical parameters. The substitute offers improved lifetime performance (10000 Hrs @ 85°C versus 1000 Hrs @ 85°C) and lower ESR (250 mOhm @ 100 Hz versus 737 mOhm @ 120 Hz). The B43501A9277M000 is ROHS3 compliant and REACH unaffected.

Selection between these parts depends on design phase and supply availability. For new designs, the LPX271M400E5P3 is the preferred choice. For existing designs requiring replacement or when LPX271M400E5P3 inventory is unavailable, the B43501A9277M000 provides direct functional substitution with enhanced reliability characteristics.

Frequently Asked Questions (FAQ)

Q: Can the B43501A9277M000 be used as a direct replacement for the LPX271M400E5P3 in existing designs?

A: Yes. The B43501A9277M000 matches all critical electrical and mechanical parameters: 270 µF capacitance, 400 V voltage rating, ±20% tolerance, 10.00 mm lead spacing, 30.00 mm diameter, and radial snap-in package configuration. The 2.00 mm height difference (37.00 mm versus 35.00 mm) is within acceptable mechanical envelope tolerances for through-hole mounting applications.

Q: What is the significance of the "Not For New Designs" status on the B43501A9277M000?

A: This designation indicates that EPCOS - TDK Electronics does not recommend this part for new product development. However, the part remains functionally equivalent and suitable for replacement applications in existing designs. New designs should prioritize the LPX271M400E5P3 or other Active-status alternatives.

Q: How do the ESR specifications differ between these parts, and does this affect substitution?

A: The LPX271M400E5P3 specifies 737 mOhm @ 120 Hz, while the B43501A9277M000 specifies 250 mOhm @ 100 Hz. The lower ESR of the substitute part indicates improved performance characteristics. ESR variations at different measurement frequencies are normal for aluminum electrolytic capacitors and do not prevent substitution. The lower ESR of the B43501A9277M000 may provide benefits in ripple current handling and thermal performance.

Q: Does the improved lifetime rating of the B43501A9277M000 affect compatibility?

A: No. The B43501A9277M000 offers 10000 Hrs @ 85°C compared to 1000 Hrs @ 85°C for the LPX271M400E5P3. This represents an improvement in reliability and does not create compatibility issues. The substitute part meets or exceeds the performance requirements of the original part.

Q: Are there any compliance or regulatory differences between these parts?

A: Both parts are ROHS3 compliant and REACH unaffected. No regulatory or compliance barriers exist to substitution between these components.

Q: What is the significance of the lead spacing and diameter specifications for substitution?

A: Lead spacing (10.00 mm) and diameter (30.00 mm) are critical parameters that determine PCB footprint compatibility. Both parts match exactly in these dimensions, ensuring direct mechanical compatibility with existing through-hole mounting patterns without PCB redesign.