LPX181M350E1P3 Equivalent & Substitute Parts

Part Overview

The LPX181M350E1P3 is a 180 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in the LPX series. This radial, can-type snap-in capacitor is designed for general-purpose applications requiring through-hole mounting. The part is currently active in production with 1084 units in stock. Substitute parts are identified when equivalent capacitance and tolerance specifications are maintained while voltage ratings, physical dimensions, or performance characteristics may vary within acceptable engineering parameters for the application circuit.

Substiute Parts

LPX181M350E1P3

Cornell Dubilier Electronics (CDE)In Stock: 1100LPX181M350E1P3 Datasheet

Current PartRFQ

LPX181M450E7P3

Cornell Dubilier Electronics (CDE)In Stock: 913LPX181M450E7P3 Datasheet

SimilarRFQ

B43544B9187M000

EPCOS - TDK ElectronicsIn Stock: 929B43544B9187M000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LPX181M350E1P3 are qualified based on the following criteria:

Primary Matching Parameters:

• Capacitance: 180 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)
• Package / Case: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 10.00 mm (exact match required)
• Diameter: 30.00 mm (exact match required)

Variable Parameters Allowing Substitution:

• Voltage - Rated: 350 V (substitutes may have equal or higher voltage ratings)
• ESR: Values within acceptable range for general-purpose applications
• Lifetime @ Temperature: Extended ratings acceptable
• Operating Temperature Range: Extended upper temperature limits acceptable
• Height - Seated: Variation acceptable within mechanical envelope constraints

Substitutes must maintain identical capacitance, tolerance, polarization, and physical footprint while accommodating variations in voltage rating, ESR, thermal performance, and height within the snap-in can form factor.

Parameter Comparison

Engineering Selection Recommendations

LPX181M450E7P3 (CDE)

This substitute maintains identical capacitance, tolerance, and ESR characteristics while providing a higher voltage rating of 450 V. The 350 V application circuit will operate within the derating envelope of this component. The height increase from 25.00 mm to 40.00 mm requires verification of available vertical clearance in the target PCB assembly. Both parts share the same series designation (LPX) and thermal performance profile (1000 Hrs @ 85°C). RoHS3 compliance and REACH unaffected status are maintained. Selection is appropriate when higher voltage margin is required or when the increased height does not conflict with mechanical constraints.

B43544B9187M000 (EPCOS - TDK Electronics)

This substitute maintains identical capacitance and tolerance while offering superior thermal performance (3000 Hrs @ 105°C versus 1000 Hrs @ 85°C) and lower ESR (330 mOhm @ 100Hz). The voltage rating of 400 V provides adequate margin for the 350 V application. The height of 27.00 mm is only 2.00 mm greater than the original part, minimizing mechanical impact. The extended operating temperature range (-40°C to 105°C) accommodates higher ambient conditions. RoHS3 compliance and REACH unaffected status are maintained. Selection is appropriate when enhanced reliability, lower ripple current dissipation, or extended temperature operation is required.

Both substitutes are active products with confirmed inventory availability and full regulatory compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can LPX181M450E7P3 be used in place of LPX181M350E1P3?

A: Yes. The LPX181M450E7P3 maintains the same 180 µF capacitance, ±20% tolerance, ESR, and thermal rating. The 450 V rating exceeds the 350 V requirement, providing additional voltage margin. The primary consideration is the increased height (40.00 mm versus 25.00 mm), which must be verified against available PCB clearance.

Q: What is the key difference between B43544B9187M000 and the original LPX181M350E1P3?

A: The B43544B9187M000 offers lower ESR (330 mOhm @ 100Hz versus 1.105 Ohm @ 120Hz) and extended thermal life (3000 Hrs @ 105°C versus 1000 Hrs @ 85°C). Capacitance and tolerance remain identical. The 400 V rating provides adequate margin for 350 V circuits. Height is 27.00 mm, only 2.00 mm greater than the original.

Q: Are all three parts mechanically compatible with the same PCB footprint?

A: Lead spacing (10.00 mm) and diameter (30.00 mm) are identical across all three parts, ensuring footprint compatibility. Height varies: LPX181M350E1P3 (25.00 mm), B43544B9187M000 (27.00 mm), and LPX181M450E7P3 (40.00 mm). Vertical clearance must be verified for each application.

Q: Do all substitute parts meet the same regulatory requirements?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and carry EAR99 ECCN classification. Moisture sensitivity level is 1 (Unlimited) for the CDE parts and Not Applicable for the EPCOS part.

Q: Which substitute should be selected for high-temperature applications?

A: The B43544B9187M000 is specified for operation to 105°C and provides 3000 Hrs lifetime at that temperature, compared to 1000 Hrs @ 85°C for the original part. This makes it suitable for elevated ambient or high-dissipation circuit environments.

Q: Can the LPX181M450E7P3 be used if space is limited?

A: No. The LPX181M450E7P3 has a height of 40.00 mm, which is 15.00 mm taller than the original LPX181M350E1P3 (25.00 mm). In space-constrained applications, the B43544B9187M000 (27.00 mm height) is the preferred substitute.

Q: What is the ripple current capability of each part?

A: LPX181M350E1P3: 1.0 A @ 120 Hz, 1.2 A @ 50 kHz. LPX181M450E7P3: 1.4 A @ 120 Hz, 1.68 A @ 50 kHz. B43544B9187M000: 1.18 A @ 100 Hz (high-frequency ripple current not specified in provided data).