LPX151M350C3P3 Equivalent & Substitute Parts

Part Overview

The LPX151M350C3P3 is a 150 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 1084 units in stock. Substitute parts are identified when equivalent capacitance and tolerance values are required but alternative voltage ratings, thermal performance, or physical dimensions better suit specific application requirements.

Substiute Parts

LPX151M350C3P3

Cornell Dubilier Electronics (CDE)In Stock: 1144LPX151M350C3P3 Datasheet

Current PartRFQ

B43508B9157M000

EPCOS - TDK ElectronicsIn Stock: 1628B43508B9157M000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LPX151M350C3P3 is determined by strict equivalence in the following parameters:

Required Equivalence (Non-Negotiable):

• Capacitance: 150 µF
• Tolerance: ±20%
• Polarization: Polar
• Mounting Type: Through Hole
• Package / Case: Radial, Can - Snap-In
• Lead Spacing: 0.394" (10.00mm)
• Diameter: 0.984" (25.00mm)

Allowable Variation (Within Substitution Scope):

• Voltage Rating: Equal to or greater than 350 V
• ESR: Lower or equivalent values acceptable
• Lifetime @ Temperature: Higher values acceptable
• Operating Temperature Range: Equal to or extended range acceptable
• Height - Seated: Variation acceptable if within physical constraints
• Ripple Current: Higher values acceptable

The substitute part B43508B9157M000 meets all required equivalence criteria while providing enhanced thermal performance and higher voltage rating.

Parameter Comparison

Engineering Selection Recommendations

Both the LPX151M350C3P3 and B43508B9157M000 are active production parts with ROHS3 compliance and REACH unaffected status, qualifying them for equivalent use in general-purpose applications.

LPX151M350C3P3 Selection Criteria:

• Applications operating at or below 350 V
• Thermal environments not exceeding 85°C
• Space-constrained designs where maximum height of 1.181" is required
• Designs requiring the specific ESR characteristics of the LPX series

B43508B9157M000 Selection Criteria:

• Applications requiring voltage margin above 350 V (rated to 400 V)
• Thermal environments up to 105°C
• Applications benefiting from extended lifetime rating (3000 Hrs @ 105°C versus 1000 Hrs @ 85°C)
• Designs where lower ESR (0.820 Ohm @ 100Hz) reduces heat generation
• Space-constrained designs where height reduction to 1.063" provides layout advantage

Both parts maintain identical lead spacing (10.00mm) and diameter (25.00mm), ensuring direct mechanical compatibility in through-hole PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can B43508B9157M000 directly replace LPX151M350C3P3 in all applications?

A: Direct replacement is valid for applications operating at or below 350 V. The B43508B9157M000 is rated to 400 V, providing voltage margin. The reduced height (1.063" versus 1.181") and lower ESR (0.820 Ohm versus 1.326 Ohm) are compatible with standard through-hole PCB designs. Lead spacing and diameter are identical.

Q: What is the significance of the ESR difference between these parts?

A: The B43508B9157M000 exhibits lower ESR (0.820 Ohm @ 100Hz) compared to the LPX151M350C3P3 (1.326 Ohm @ 120Hz). Lower ESR reduces resistive heating and improves ripple current handling efficiency. This characteristic is beneficial in high-ripple-current applications.

Q: Are there thermal performance differences?

A: Yes. The LPX151M350C3P3 is rated for 1000 hours at 85°C. The B43508B9157M000 is rated for 3000 hours at 105°C, indicating superior thermal stability and extended operational life in elevated-temperature environments.

Q: Do both parts meet the same compliance standards?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity level). Compliance profiles are equivalent.

Q: What is the physical compatibility between these parts?

A: Both parts are radial, can-style snap-in capacitors with identical lead spacing (10.00mm) and diameter (25.00mm). The B43508B9157M000 is 3mm shorter (1.063" versus 1.181"), which may provide layout advantages in space-constrained designs without affecting electrical performance.

Q: Can LPX151M350C3P3 be used where B43508B9157M000 is specified?

A: Substitution is not recommended. The B43508B9157M000 is specified for applications requiring 400 V rating, extended thermal performance, or lower ESR characteristics. Using the lower-rated LPX151M350C3P3 may not meet design margin requirements.