LPX271M350E3P3 Equivalent & Substitute Parts

Part Overview

The LPX271M350E3P3 is a 270 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in the LPX series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring through-hole mounting. The part is currently active in production with full RoHS3 compliance and REACH unaffected status. Substitute parts are identified when original inventory is unavailable or when application requirements permit operation at higher voltage ratings or improved thermal performance specifications.

Key Parameters

Parameter	Value	Unit
Capacitance	270	µF
Voltage - Rated	350	V
Tolerance	±20	%
ESR @ 120Hz	737	mOhm
Lifetime @ 85°C	1000	Hrs
Operating Temperature Range	-40 to 85	°C
Lead Spacing	10.00	mm
Diameter	30.00	mm
Height - Seated (Max)	30.00	mm
Package Type	Radial, Can - Snap-In	-
Mounting Type	Through Hole	-

Substitute Part Grouping Explanation

Substitution eligibility for the LPX271M350E3P3 is determined by the following criteria:

Mandatory Matching Parameters:

Capacitance: 270 µF (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 10.00 mm (exact match required)
Diameter: 30.00 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:

Voltage - Rated: Equal to or greater than 350 V
Height - Seated (Max): Equal to or less than specified maximum for physical clearance
ESR: Lower values acceptable for improved performance
Lifetime @ Temperature: Higher values acceptable for improved reliability
Operating Temperature Range: Equal to or greater than specified range
RoHS Status: ROHS3 Compliant (required)

The B43644C9277M000 substitute meets all mandatory matching criteria and provides enhanced specifications in voltage rating, ESR, lifetime, and operating temperature range.

Parameter Comparison

Parameter	LPX271M350E3P3 (Main)	B43644C9277M000 (Substitute)	Compatibility
Capacitance	270 µF	270 µF	Match
Voltage - Rated	350 V	400 V	Substitute rated higher
Tolerance	±20%	±20%	Match
ESR @ Reference Frequency	737 mOhm @ 120Hz	410 mOhm @ 100Hz	Substitute lower
Lifetime @ Temperature	1000 Hrs @ 85°C	5000 Hrs @ 105°C	Substitute superior
Operating Temperature Range	-40°C to 85°C	-40°C to 105°C	Substitute wider range
Lead Spacing	10.00 mm	10.00 mm	Match
Diameter	30.00 mm	30.00 mm	Match
Height - Seated (Max)	30.00 mm	32.00 mm	Substitute 2mm taller
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Match
Mounting Type	Through Hole	Through Hole	Match
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
REACH Status	REACH Unaffected	REACH Unaffected	Match

Engineering Selection Recommendations

The B43644C9277M000 (EPCOS - TDK Electronics) is a direct substitute for the LPX271M350E3P3 based on the following engineering criteria:

Electrical Compatibility: Both capacitors share identical capacitance (270 µF) and tolerance (±20%). The substitute's 400 V rating exceeds the main part's 350 V requirement, providing additional voltage margin in the application circuit. The substitute's lower ESR (410 mOhm @ 100Hz versus 737 mOhm @ 120Hz) indicates improved performance characteristics.

Thermal and Reliability Performance: The substitute demonstrates superior lifetime specifications (5000 Hrs @ 105°C versus 1000 Hrs @ 85°C) and an extended operating temperature range (-40°C to 105°C versus -40°C to 85°C), supporting applications requiring enhanced thermal stability.

Physical Compatibility: Lead spacing (10.00 mm) and diameter (30.00 mm) are identical, ensuring PCB footprint compatibility. The substitute's maximum seated height is 32.00 mm compared to 30.00 mm for the main part. Physical clearance verification is required in applications with height constraints.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the B43644C9277M000 be used as a direct replacement for the LPX271M350E3P3?

A: Yes, the B43644C9277M000 is electrically and mechanically compatible. Both capacitors have identical capacitance (270 µF), tolerance (±20%), lead spacing (10.00 mm), and diameter (30.00 mm). The substitute's 400 V rating is suitable for circuits designed for 350 V operation. Physical clearance must be verified, as the substitute is 2 mm taller (32.00 mm versus 30.00 mm).

Q: What are the key differences between these two capacitors?

A: The primary differences are voltage rating (350 V versus 400 V), ESR (737 mOhm @ 120Hz versus 410 mOhm @ 100Hz), lifetime (1000 Hrs @ 85°C versus 5000 Hrs @ 105°C), and maximum operating temperature (85°C versus 105°C). The substitute offers improved electrical performance and thermal reliability.

Q: Is the 2 mm height difference significant?

A: The 2 mm difference (30.00 mm to 32.00 mm) must be evaluated against available PCB clearance. Applications with tight vertical constraints require physical verification before substitution.

Q: Are both parts RoHS3 compliant?

A: Yes, both the LPX271M350E3P3 and B43644C9277M000 are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

Q: Can I use the substitute in a 350 V circuit?

A: Yes. The substitute's 400 V rating provides adequate voltage margin for 350 V circuit operation. The higher voltage rating does not negatively affect circuit function.

Q: What is the lead spacing for both capacitors?

A: Both capacitors have a lead spacing of 10.00 mm (0.394"), ensuring identical PCB footprint compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message