278LMB050M2BD Equivalent & Substitute Parts

Part Overview

The 278LMB050M2BD is an aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor, rated at 2700 µF with a 50 V operating voltage. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring stable performance over extended operational lifespans. The part is currently in active product status with full RoHS3 compliance and represents a proven industrial-grade solution for energy storage and filtering applications. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and access to alternative sources when the primary component becomes unavailable or when design requirements necessitate comparison with functionally compatible alternatives.

Key Parameters

Parameter	Specification
Capacitance	2700 µF
Voltage - Rated	50 V
Tolerance	±20%
ESR (Equivalent Series Resistance)	214.908 mOhm @ 120 Hz
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)
Case Diameter	0.866" (22.00 mm)
Height - Seated (Max)	1.260" (32.00 mm)
Package / Case Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Polarization	Polar
RoHS Status	RoHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution eligibility for the 278LMB050M2BD is determined by strict adherence to the following key electrical and mechanical parameters:

Electrical Requirements:

Capacitance: 2700 µF (exact value required)
Voltage Rating: 50 V minimum (no derating acceptable)
Tolerance: ±20% (matching tolerance specification)
Lifetime: 3000 Hrs @ 105°C (minimum requirement)
Operating Temperature Range: -40°C ~ 105°C (full range compatibility)
Polarization: Polar (electrolytic type)

Mechanical Requirements:

Package Type: Radial, Can - Snap-In (form factor constraint)
Lead Spacing: 0.394" (10.00 mm) (PCB pitch requirement)
Case Diameter: 0.866" (22.00 mm) (board space constraint)
Height - Seated (Max): 1.260" (32.00 mm) (clearance requirement)
Mounting Type: Through Hole (assembly process compatibility)

Compliance Requirements:

RoHS3 Compliant status
REACH Unaffected status

The Nichicon LGU1H272MELZ qualifies as a parametric equivalent substitute, matching all critical electrical ratings, mechanical dimensions, and compliance certifications.

Parameter Comparison

Parameter	278LMB050M2BD (Cornell Dubilier)	LGU1H272MELZ (Nichicon)	Status
Manufacturer Part Number	278LMB050M2BD	LGU1H272MELZ	Different
Capacitance	2700 µF	2700 µF	Equivalent
Voltage - Rated	50 V	50 V	Equivalent
Tolerance	±20%	±20%	Equivalent
Lifetime @ Temperature	3000 Hrs @ 105°C	3000 Hrs @ 105°C	Equivalent
Operating Temperature Range	-40°C ~ 105°C	-40°C ~ 105°C	Equivalent
Polarization	Polar	Polar	Equivalent
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	Equivalent
Case Diameter	0.866" (22.00 mm)	0.866" (22.00 mm)	Equivalent
Height - Seated (Max)	1.260" (32.00 mm)	1.260" (32.00 mm)	Equivalent
Package / Case Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
RoHS Status	RoHS3 Compliant	RoHS3 Compliant	Equivalent
Ripple Current @ 120 Hz	1.8 A @ 120 Hz	1.7 A @ 120 Hz	Comparable
Product Status	Active	Active	Equivalent

Engineering Selection Recommendations

Both the 278LMB050M2BD and LGU1H272MELZ are active, production-supported components with full RoHS3 compliance and REACH Unaffected status. The LGU1H272MELZ qualifies as a direct parametric equivalent, matching all specified electrical ratings, mechanical dimensions, and environmental operating parameters. Selection between these components should be based on availability, delivery lead times, pricing, and established supply chain relationships. Both parts demonstrate equivalent circuit performance for general-purpose aluminum electrolytic capacitor applications within the specified voltage and temperature operating envelope.

Frequently Asked Questions (FAQ)

Q: Can the Nichicon LGU1H272MELZ be used as a direct replacement for the Cornell Dubilier 278LMB050M2BD? A: Yes. The LGU1H272MELZ meets all electrical and mechanical specifications for the 278LMB050M2BD, including capacitance (2700 µF), voltage rating (50 V), tolerance (±20%), thermal lifetime (3000 Hrs @ 105°C), and package dimensions (radial, can-style snap-in with 10.00 mm lead spacing, 22.00 mm diameter, 32.00 mm height).

Q: Are there differences in Equivalent Series Resistance (ESR) between these parts? A: The 278LMB050M2BD specifies 214.908 mOhm @ 120 Hz. The LGU1H272MELZ does not provide ESR specification in the available data. Both parts meet the 3000-hour lifetime specification at 105°C, indicating comparable performance stability.

Q: Do both parts have identical ripple current ratings? A: The 278LMB050M2BD provides 1.8 A @ 120 Hz ripple current capacity. The LGU1H272MELZ provides 1.7 A @ 120 Hz. Both ratings support equivalent application requirements for low-frequency ripple environments. High-frequency ripple current handling differs slightly (2.25 A @ 10 kHz versus 1.955 A @ 50 kHz), with application-specific requirements determining optimal selection.

Q: Are compliance certifications identical? A: Both parts are RoHS3 compliant and REACH Unaffected. Moisture Sensitivity Level differs (1 [Unlimited] for 278LMB050M2BD; Not Applicable for LGU1H272MELZ), indicating equivalent handling compatibility for standard manufacturing environments.

Q: What determines substitutability for this component category? A: Substitution requires exact matching of capacitance (2700 µF), voltage rating (50 V), tolerance (±20%), mechanical package type (radial, can-style snap-in), lead spacing (10.00 mm), case dimensions, and thermal lifetime (3000 Hrs @ 105°C). Compliance with RoHS3 and REACH requirements is mandatory. Operating temperature range (-40°C ~ 105°C) and polarization type must remain identical.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message