157LMB400M2CD Equivalent & Substitute Parts

Part Overview

The 157LMB400M2CD is a 150 µF, 400 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 through-hole mounting. The part is active and in stock with 1107 units available.

Substitute parts are necessary when the original manufacturer part becomes unavailable, when design requirements change to accommodate higher voltage ratings or extended operational lifetimes, or when alternative suppliers offer equivalent electrical and mechanical specifications within the same package class.

Substiute Parts

157LMB400M2CD

Cornell Dubilier / Illinois CapacitorIn Stock: 1181157LMB400M2CD Datasheet

Current PartRFQ

LGU2G151MELA

NichiconIn Stock: 3719LGU2G151MELA Datasheet

DirectRFQ

450VXG150MEFCSN25X30

RubyconIn Stock: 3214450VXG150MEFCSN25X30 Datasheet

UpgradeRFQ

450VXH150MEFCSN25X30

RubyconIn Stock: 274092450VXH150MEFCSN25X30 Datasheet

UpgradeRFQ

B43508B5157M000

EPCOS - TDK ElectronicsIn Stock: 1158B43508B5157M000 Datasheet

UpgradeRFQ

LGX2W151MELA30

NichiconIn Stock: 3406LGX2W151MELA30 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 157LMB400M2CD is determined by the following critical parameters:

Mandatory Matching Parameters:

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

Allowable Variation Parameters:

• Voltage - Rated: 400 V (minimum); higher voltage ratings are acceptable as they provide increased safety margin
• Height - Seated (Max): 1.260" (32.00mm) is the reference; minor variations within package constraints are acceptable
• Lifetime @ Temperature: 3000 Hrs @ 105°C (minimum); extended lifetimes are acceptable
• Operating Temperature Range: -25°C ~ 105°C (minimum); extended ranges are acceptable
• RoHS Status: ROHS3 Compliant (required)

Substitute parts are grouped into two categories: direct equivalents (matching 400 V rating) and upgrades (higher voltage ratings with extended operational lifetimes).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (400 V Rating):

The LGU2G151MELA from Nichicon is a direct equivalent to the 157LMB400M2CD. Both parts share identical electrical specifications (150 µF, ±20%, 400 V, 3000 Hrs @ 105°C) and mechanical compatibility (lead spacing, diameter, radial snap-in package). The LGU2G151MELA has a slightly reduced seated height of 1.181" compared to 1.260", which remains within acceptable package constraints for through-hole applications. This part is ROHS3 compliant and active in production.

Upgrade Options (450 V Rating with Extended Lifetime):

Three upgrade substitutes are available with 450 V ratings and 5000-hour lifetimes at 105°C:

• LGX2W151MELA30 (Nichicon): Provides 450 V rating with 5000-hour lifetime. Maintains -25°C to 105°C operating range and full mechanical compatibility with 1.260" seated height.

• 450VXG150MEFCSN25X30 (Rubycon): Provides 450 V rating with 5000-hour lifetime. Maintains -25°C to 105°C operating range and full mechanical compatibility with 1.260" seated height.

• 450VXH150MEFCSN25X30 (Rubycon): Provides 450 V rating with 5000-hour lifetime. Maintains -25°C to 105°C operating range and full mechanical compatibility with 1.260" seated height. Highest inventory availability at 274,082 units.

Alternative Upgrade (450 V Rating, Extended Temperature Range):

The B43508B5157M000 from EPCOS - TDK Electronics offers 450 V rating with extended operating temperature range (-40°C to 105°C). Lifetime is 3000 hours at 105°C, matching the original part. This option is suitable for applications requiring lower temperature operation.

All substitute parts are ROHS3 compliant and maintain the same polarization, lead spacing, and radial snap-in package configuration as the original 157LMB400M2CD.

Frequently Asked Questions (FAQ)

Q: Can the LGU2G151MELA replace the 157LMB400M2CD directly?

A: Yes. The LGU2G151MELA is a direct equivalent with matching capacitance (150 µF), tolerance (±20%), voltage rating (400 V), and lifetime (3000 Hrs @ 105°C). Both parts use identical lead spacing (0.394"), diameter (0.984"), and radial snap-in package. The LGU2G151MELA has a slightly lower seated height (1.181" vs. 1.260"), which does not affect compatibility in through-hole applications.

Q: What is the difference between direct equivalents and upgrade substitutes?

A: Direct equivalents match the original part's voltage rating (400 V) and lifetime specifications. Upgrade substitutes provide higher voltage ratings (450 V) and extended operational lifetimes (5000 Hrs @ 105°C instead of 3000 Hrs). Upgrades are electrically and mechanically compatible but offer enhanced performance margins.

Q: Can I use a 450 V rated capacitor in place of a 400 V rated capacitor?

A: Yes. A higher voltage rating provides increased safety margin and is electrically compatible. The 450 V substitutes (LGX2W151MELA30, 450VXG150MEFCSN25X30, 450VXH150MEFCSN25X30, and B43508B5157M000) are all suitable replacements for the 400 V original part.

Q: Are all substitute parts mechanically compatible with the original PCB layout?

A: Yes. All substitute parts maintain the same lead spacing (0.394" / 10.00mm), can diameter (0.984" / 25.00mm), and radial snap-in package configuration. The LGU2G151MELA has a seated height of 1.181" (slightly lower than the original 1.260"), while all 450 V upgrades maintain the 1.260" height. These variations are within acceptable through-hole mounting tolerances.

Q: Which substitute offers the best long-term reliability?

A: The 450 V upgrade substitutes with 5000-hour lifetimes (LGX2W151MELA30, 450VXG150MEFCSN25X30, and 450VXH150MEFCSN25X30) provide extended operational life compared to the original 3000-hour specification. The 450VXH150MEFCSN25X30 offers the highest inventory availability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the compliance status of the original 157LMB400M2CD.

Q: What is the difference between the three 450 V, 5000-hour upgrade options?

A: LGX2W151MELA30 (Nichicon), 450VXG150MEFCSN25X30 (Rubycon), and 450VXH150MEFCSN25X30 (Rubycon) are electrically and mechanically identical. All three provide 150 µF, ±20%, 450 V, 5000-hour lifetime at 105°C with identical package dimensions. Selection can be based on supplier preference or inventory availability. The 450VXH150MEFCSN25X30 has the highest stock level.

Q: Does the B43508B5157M000 offer any unique advantages?

A: The B43508B5157M000 extends the operating temperature range to -40°C (compared to -25°C for other options), making it suitable for applications requiring lower temperature operation. However, it maintains the 3000-hour lifetime of the original part rather than the extended 5000-hour lifetime of other 450 V upgrades.