LPX181M450C4P3 Equivalent & Substitute Parts

Part Overview

The LPX181M450C4P3 is a 180 µF, 450 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 high voltage energy storage and filtering. The part is currently Active in product status with 1,042 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the specified tolerances, ensuring functional interchangeability in circuit applications.

Substiute Parts

LPX181M450C4P3

Cornell Dubilier Electronics (CDE)In Stock: 1065LPX181M450C4P3 Datasheet

Current PartRFQ

LPX181M450E7P3

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LPX181M450C4P3 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Capacitance: 180 µF (fixed value)
• Voltage Rating: 450 V (minimum requirement)
• Tolerance: ±20% (acceptable range)
• ESR: 1.105 Ohm @ 120Hz (performance specification)
• Lifetime: 1000 Hrs @ 85°C (reliability specification)
• Operating Temperature: -40°C ~ 85°C (environmental range)

Mechanical Equivalence Requirements:

• Lead Spacing: 0.394" (10.00mm) (PCB footprint compatibility)
• Mounting Type: Through Hole (assembly method)
• Package / Case: Radial, Can - Snap-In (form factor)
• Polarization: Polar (electrical orientation)

Compliance Requirements:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected
• Moisture Sensitivity Level: 1 (Unlimited)

The LPX181M450E7P3 meets all electrical and mechanical equivalence criteria and is classified as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

LPX181M450C4P3 Primary Selection: Select the LPX181M450C4P3 when the original design specifications require the exact physical dimensions of 0.984" diameter and 1.772" maximum seated height. This part is Active in product status with higher inventory availability (1,042 units).

LPX181M450E7P3 Substitute Selection: The LPX181M450E7P3 is electrically equivalent and functionally interchangeable. This substitute maintains all critical electrical parameters: 180 µF capacitance, 450 V rating, ±20% tolerance, 1.105 Ohm ESR @ 120Hz, and 1000 Hrs @ 85°C lifetime. The substitute exhibits higher ripple current ratings (1.4 A @ 120 Hz and 1.68 A @ 50 kHz versus 1.3 A and 1.56 A respectively), indicating enhanced performance capability. Physical dimensions differ: the substitute is larger in diameter (1.181" versus 0.984") but shorter in height (1.575" versus 1.772"). Both parts are ROHS3 Compliant, REACH Unaffected, and Active in product status. Select LPX181M450E7P3 when PCB layout accommodates the larger diameter and reduced height, or when higher ripple current handling is beneficial.

Frequently Asked Questions (FAQ)

Q: Can LPX181M450E7P3 replace LPX181M450C4P3 in all applications?

A: The LPX181M450E7P3 is electrically equivalent and maintains identical capacitance (180 µF), voltage rating (450 V), tolerance (±20%), ESR (1.105 Ohm @ 120Hz), and lifetime (1000 Hrs @ 85°C). However, physical dimensions differ. The substitute has a larger diameter (1.181" versus 0.984") and shorter height (1.575" versus 1.772"). Verify PCB layout space accommodates these dimensional changes before substitution.

Q: What are the key electrical parameters that define substitution?

A: Substitution is defined by: capacitance value (180 µF), rated voltage (450 V), tolerance (±20%), ESR specification (1.105 Ohm @ 120Hz), and lifetime rating (1000 Hrs @ 85°C). All these parameters are identical between the main part and substitute.

Q: Are both parts compliant with environmental regulations?

A: Both LPX181M450C4P3 and LPX181M450E7P3 are ROHS3 Compliant, REACH Unaffected, and have Moisture Sensitivity Level 1 (Unlimited). Both meet current environmental and regulatory requirements.

Q: What is the difference in ripple current handling?

A: The LPX181M450E7P3 substitute has higher ripple current ratings: 1.4 A @ 120 Hz (versus 1.3 A) and 1.68 A @ 50 kHz (versus 1.56 A). This indicates the substitute can handle higher AC current stress, which may be advantageous in high-ripple applications.

Q: How do the physical dimensions affect PCB design?

A: The main part LPX181M450C4P3 has a 0.984" diameter and 1.772" height. The substitute LPX181M450E7P3 has a 1.181" diameter and 1.575" height. Both maintain identical 0.394" (10.00mm) lead spacing for PCB footprint compatibility. Verify available board space for the larger diameter before selecting the substitute.

Q: Are both parts currently available?

A: Both parts are Active in product status. LPX181M450C4P3 has 1,042 units in stock. LPX181M450E7P3 has 878 units in stock. Both are available for immediate procurement.