LPX391M200C3P3 Equivalent & Substitute Parts

Part Overview

The LPX391M200C3P3 is a 390 µF, 200 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 stable capacitance and reliable performance across industrial temperature ranges. The part is currently active in production with full RoHS3 compliance.

Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this capacitor category. Substitution becomes necessary due to inventory availability, supply chain considerations, or application-specific performance requirements.

Substiute Parts

LPX391M200C3P3

Cornell Dubilier Electronics (CDE)In Stock: 1039LPX391M200C3P3 Datasheet

Current PartRFQ

LLS2D391MELZ

NichiconIn Stock: 1230LLS2D391MELZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LPX391M200C3P3 is determined by strict adherence to the following critical parameters:

Electrical Equivalence Requirements:

• Capacitance value: 390 µF (exact match)
• Voltage rating: 200 V (exact match)
• Tolerance: ±20% (exact match)
• Polarization: Polar (exact match)

Mechanical Compatibility Requirements:

• Package type: Radial, Can - Snap-In (exact match)
• Lead spacing: 0.394" (10.00mm) (exact match)
• Mounting type: Through Hole (exact match)
• Height seated maximum: 1.181" (30.00mm) (exact match)

Environmental & Compliance Requirements:

• Operating temperature range: -40°C ~ 85°C (minimum requirement)
• RoHS3 compliance: Required
• REACH status: Unaffected (acceptable)

The substitute part LLS2D391MELZ meets all critical electrical, mechanical, and compliance parameters. Variations in ESR, ripple current ratings, and lifetime specifications do not disqualify substitution when the core parameters align.

Parameter Comparison

Engineering Selection Recommendations

LLS2D391MELZ (Nichicon) as Direct Substitute:

The LLS2D391MELZ qualifies as a direct electrical and mechanical substitute for the LPX391M200C3P3. Both parts maintain identical capacitance (390 µF), voltage rating (200 V), tolerance (±20%), operating temperature range (-40°C ~ 85°C), and package configuration (Radial, Can - Snap-In with 0.394" lead spacing).

Both parts are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for industrial and commercial applications.

The Nichicon LLS2D391MELZ demonstrates superior performance characteristics in lifetime rating (3000 Hrs @ 85°C versus 1000 Hrs) and ripple current capacity (1.73 A @ 120 Hz versus 1.6 A), providing enhanced reliability margins in the target application.

The dimensional difference in can diameter (22.00mm versus 25.00mm) does not affect substitution eligibility, as the critical mounting parameters (lead spacing, height, and mounting type) remain identical. The smaller diameter of the Nichicon part may provide additional PCB layout flexibility.

Both parts are suitable for general-purpose applications and maintain full compatibility with through-hole assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the LLS2D391MELZ replace the LPX391M200C3P3 in existing designs?

A: Yes. The LLS2D391MELZ is electrically and mechanically equivalent. Both parts share identical capacitance (390 µF), voltage rating (200 V), tolerance (±20%), lead spacing (10.00mm), and mounting configuration (through-hole, radial snap-in). No circuit redesign is required.

Q: Does the difference in can diameter affect PCB compatibility?

A: No. The can diameter difference (25.00mm for CDE versus 22.00mm for Nichicon) does not impact PCB mounting compatibility. The critical mounting parameters—lead spacing (10.00mm), height (30.00mm maximum), and mounting type (through-hole)—are identical. The smaller Nichicon diameter may provide additional layout flexibility.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the LPX391M200C3P3 and LLS2D391MELZ are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for industrial applications.

Q: What is the significance of the lifetime rating difference?

A: The LLS2D391MELZ specifies 3000 Hrs @ 85°C, compared to 1000 Hrs @ 85°C for the LPX391M200C3P3. This indicates the Nichicon part has a longer operational life under elevated temperature conditions. Both parts meet the stated operating temperature range of -40°C ~ 85°C.

Q: Can these parts be used interchangeably in high-ripple-current applications?

A: Both parts are rated for ripple current at 120 Hz. The LLS2D391MELZ specifies 1.73 A @ 120 Hz, exceeding the LPX391M200C3P3 specification of 1.6 A. For applications requiring ripple current performance at higher frequencies, the Nichicon part also specifies 2.595 A @ 50 kHz, providing additional performance data.

Q: What is the packaging difference between these parts?

A: The LPX391M200C3P3 is supplied in standard packaging, while the LLS2D391MELZ is supplied in bulk packaging. Both parts are identical in electrical and mechanical specifications; packaging format does not affect component performance or compatibility.

Q: Are there any temperature-related restrictions for substitution?

A: No. Both parts operate across the identical temperature range of -40°C ~ 85°C. Substitution is valid across the full operating temperature specification.