187LMB450M2CF Equivalent & Substitute Parts Reference

Part Overview

The 187LMB450M2CF is a 180 µF, 450 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the LMB 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 production with 1106 pieces in stock. Substitute parts are identified when original inventory becomes unavailable, when lead times extend beyond project requirements, or when alternative manufacturers offer equivalent electrical and mechanical specifications within the same package class.

Substiute Parts

187LMB450M2CF

Cornell Dubilier / Illinois CapacitorIn Stock: 1203187LMB450M2CF Datasheet

Current PartRFQ

450MXG180MEFCSN25X35

RubyconIn Stock: 982450MXG180MEFCSN25X35 Datasheet

DirectRFQ

450VXH180MEFCSN25X30

RubyconIn Stock: 274024450VXH180MEFCSN25X30 Datasheet

DirectRFQ

LGW2W181MELA40

NichiconIn Stock: 990LGW2W181MELA40 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 187LMB450M2CF is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

• Capacitance: 180 µF (exact match required)
• Voltage Rating: 450 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package Type: Radial, Can - Snap-In (exact match required)
• Lead Spacing: 0.394" (10.00 mm) (exact match required)
• Diameter: 0.984" (25.00 mm) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Polarization: Polar (exact match required)
• Operating Temperature Range: -25°C to 105°C (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

Variable Parameters (Allowed to Differ):

• Height - Seated (Max): Variation permitted within mechanical envelope constraints
• Lifetime @ Temperature: Variation permitted; higher ratings acceptable
• ESR (Equivalent Series Resistance): Variation permitted; lower values acceptable
• Ripple Current Ratings: Variation permitted; higher ratings acceptable
• Manufacturer and Series designation

All identified substitute parts meet these criteria and are sourced from active production lines with current inventory availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (450VXH180MEFCSN25X30 - Rubycon VXH Series): This substitute offers the highest operational reliability with 5000 hours lifetime at 105°C, compared to 3000 hours for the original part. The reduced height (1.260" vs. 1.654") provides superior mechanical fit in space-constrained applications. Inventory availability is substantial at 273,982 pieces. All electrical parameters remain within specification, and ROHS3 compliance is maintained. This part is recommended as the primary substitute when the original 187LMB450M2CF is unavailable.

Secondary Selection (450MXG180MEFCSN25X35 - Rubycon MXG Series): This substitute maintains 3000 hours lifetime at 105°C with slightly elevated ripple current ratings (1.27 A @ 120 Hz and 1.778 A @ 10 kHz). Height is 1.457", providing moderate space savings. Inventory is available at 920 pieces. This part is suitable when the primary substitute is unavailable and the application does not require extended lifetime ratings.

Tertiary Selection (LGW2W181MELA40 - Nichicon LGW Series): This substitute maintains 3000 hours lifetime at 105°C with the highest ripple current rating at 120 Hz (1.35 A). Height is 1.575", closest to the original part's 1.654" dimension. Inventory is available at 882 pieces. This part is suitable for applications requiring maximum ripple current handling or when mechanical envelope constraints favor taller packages.

All three substitutes are active production parts with current inventory, ROHS3 compliance, and identical electrical specifications for capacitance, voltage, and tolerance.

Frequently Asked Questions (FAQ)

Q: Can the 450VXH180MEFCSN25X30 be used as a direct replacement for the 187LMB450M2CF?

A: Yes. Both parts share identical capacitance (180 µF), voltage rating (450 V), tolerance (±20%), package type (radial, can - snap-in), lead spacing (0.394"), diameter (0.984"), operating temperature range (-25°C to 105°C), and RoHS3 compliance. The 450VXH180MEFCSN25X30 has a reduced height (1.260" vs. 1.654"), which is mechanically compatible with through-hole snap-in mounting. The extended lifetime (5000 hours vs. 3000 hours at 105°C) provides additional operational margin.

Q: What is the primary difference between the three substitute parts?

A: The three substitutes differ in height and lifetime specifications. The 450VXH180MEFCSN25X30 offers the shortest height (1.260") and longest lifetime (5000 hours). The 450MXG180MEFCSN25X35 provides intermediate height (1.457") and standard lifetime (3000 hours). The LGW2W181MELA40 offers the tallest height (1.575") and highest ripple current rating at 120 Hz (1.35 A). All three maintain identical electrical specifications for the critical parameters.

Q: Are there any mechanical constraints when substituting these parts?

A: The primary mechanical consideration is height. The original 187LMB450M2CF has a maximum seated height of 1.654". All three substitutes have reduced heights (1.260" to 1.575"), which are mechanically compatible with standard through-hole snap-in mounting. Reduced height may provide additional clearance in space-constrained applications. Lead spacing (0.394") and diameter (0.984") are identical across all parts, ensuring PCB footprint compatibility.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All three substitute parts (450VXH180MEFCSN25X30, 450MXG180MEFCSN25X35, and LGW2W181MELA40) are ROHS3 compliant, matching the compliance status of the original 187LMB450M2CF.

Q: Which substitute should be selected for maximum operational lifetime?

A: The 450VXH180MEFCSN25X30 (Rubycon VXH series) offers 5000 hours lifetime at 105°C, compared to 3000 hours for the original part and the other two substitutes. This extended lifetime provides additional operational margin in high-temperature environments.

Q: Are there inventory differences between the substitute parts?

A: Yes. The 450VXH180MEFCSN25X30 has the highest inventory availability at 273,982 pieces. The 450MXG180MEFCSN25X35 has 920 pieces in stock, and the LGW2W181MELA40 has 882 pieces. The original 187LMB450M2CF has 1106 pieces available.

Q: Can ripple current ratings be used as a selection criterion?

A: Ripple current ratings vary among the substitutes and the original part. The original 187LMB450M2CF has 1.1 A @ 120 Hz and 1.617 A @ 10 kHz. The 450VXH180MEFCSN25X30 has 1.19 A @ 120 Hz and 1.666 A @ 10 kHz. The 450MXG180MEFCSN25X35 has 1.27 A @ 120 Hz and 1.778 A @ 10 kHz. The LGW2W181MELA40 has 1.35 A @ 120 Hz. Higher ripple current ratings provide additional margin in applications with significant AC current components. Selection should be based on application requirements.

Q: What is the significance of ESR (Equivalent Series Resistance)?

A: The original 187LMB450M2CF specifies ESR of 2.30259 Ohm @ 120 Hz. The three substitute parts do not provide ESR specifications in the available data. ESR affects capacitor heating and filtering performance at high frequencies. Applications requiring specific ESR values should verify substitute part specifications with the manufacturer before implementation.