157LBA400M2BF Equivalent & Substitute Parts Reference

Part Overview

The 157LBA400M2BF is a 150 µF, 400 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the LBA series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring through-hole mounting with a 10.00 mm lead spacing and 22.00 mm diameter form factor. The part operates across a temperature range of -25°C to 85°C with a rated lifetime of 2000 hours at 85°C and an ESR of 1.65786 Ohm @ 120 Hz. The 157LBA400M2BF maintains active product status and is RoHS3 compliant.

Equivalent and substitute parts are necessary when the original part becomes unavailable, when design requirements demand extended operational lifetime, higher temperature ratings, or improved electrical characteristics such as lower ESR or higher ripple current capacity. Substitute parts must maintain identical capacitance (150 µF), tolerance (±20%), mechanical dimensions, lead spacing, and mounting configuration to ensure direct replacement compatibility.

Key Parameters

Parameter	Value	Unit	Substitution Criticality
Capacitance	150	µF	Critical - Must Match Exactly
Tolerance	±20%	%	Critical - Must Match Exactly
Voltage - Rated	400	V	Critical - Minimum Requirement
Lead Spacing	10.00	mm	Critical - PCB Layout Compatibility
Size / Dimension (Diameter)	22.00	mm	Critical - Physical Fit
Height - Seated (Max)	42.00	mm	Critical - Clearance Requirement
Mounting Type	Through Hole	-	Critical - Assembly Method
Package / Case	Radial, Can - Snap-In	-	Critical - Form Factor
Polarization	Polar	-	Critical - Circuit Polarity
ESR @ 120 Hz	1.65786	Ohm	Performance - Lower is Better
Lifetime @ Temperature	2000 Hrs @ 85°C	-	Performance - Higher is Better
Operating Temperature Range	-25°C ~ 85°C	-	Performance - Extended Range Beneficial
RoHS Status	ROHS3 Compliant	-	Compliance - Required

Substitute Part Grouping Explanation

Substitute parts for the 157LBA400M2BF are grouped into two categories based on voltage rating and performance characteristics:

Category 1: 400 V Rated Substitutes (Direct Voltage Match) These parts maintain the 400 V voltage rating of the original part and are suitable for applications where the circuit design specifies 400 V operation. Parts in this category include B43501A9157M000 (EPCOS - TDK Electronics), B43504A9157M000 (EPCOS - TDK Electronics), and LAQ2G151MELZ40 (Nichicon). All maintain the critical parameters: 150 µF capacitance, ±20% tolerance, 10.00 mm lead spacing, 22.00 mm diameter, 42.00 mm maximum height, radial snap-in package, and through-hole mounting.

Category 2: 450 V Rated Substitutes (Voltage Upgrade) These parts provide a 50 V voltage rating increase to 450 V while maintaining all other critical mechanical and electrical parameters. Parts in this category include 450VXG150MEFCSN22X40 (Rubycon), B43508A5157M000 (EPCOS - TDK Electronics), ELXS451VSN151MP40S (Chemi-Con), LGN2W151MELZ40 (Nichicon), LGX2W151MELZ40 (Nichicon), and LQS2W151MELZ40 (Nichicon). The 450 V rating provides additional design margin and is backward compatible with 400 V circuit applications.

Substitution Logic: All substitute parts share identical capacitance (150 µF), tolerance (±20%), lead spacing (10.00 mm), diameter (22.00 mm), height (42.00 mm maximum), mounting type (through-hole), and package style (radial, can - snap-in). Voltage rating substitution follows the principle that a higher-rated part (450 V) is compatible with a lower-rated circuit requirement (400 V). Product status, lifetime ratings, ESR characteristics, and operating temperature ranges vary among substitutes and are provided for performance comparison.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Tolerance (%)	Voltage (V)	ESR @ Frequency	Lifetime @ Temp	Operating Temp (°C)	Lead Spacing (mm)	Diameter (mm)	Height Max (mm)	Product Status	RoHS Status
157LBA400M2BF	Cornell Dubilier / Illinois Capacitor	LBA	150	±20	400	1.65786 Ω @ 120 Hz	2000 Hrs @ 85°C	-25 ~ 85	10.00	22.00	42.00	Active	ROHS3
450VXG150MEFCSN22X40	Rubycon	VXG	150	±20	450	Not Specified	5000 Hrs @ 105°C	-25 ~ 105	10.00	22.00	42.00	Active	ROHS3
B43501A9157M000	EPCOS - TDK Electronics	B43501	150	±20	400	440 mOhm @ 100 Hz	10000 Hrs @ 85°C	-40 ~ 85	10.00	22.00	42.00	Not For New Designs	ROHS3
B43504A9157M000	EPCOS - TDK Electronics	B43504	150	±20	400	590 mOhm @ 100 Hz	3000 Hrs @ 105°C	-40 ~ 105	10.00	22.00	42.00	Not For New Designs	ROHS3
B43508A5157M000	EPCOS - TDK Electronics	B43508	150	±20	450	820 mOhm @ 100 Hz	3000 Hrs @ 105°C	-40 ~ 105	10.00	22.00	42.00	Active	ROHS3
ELXS451VSN151MP40S	Chemi-Con	LXS	150	±20	450	Not Specified	5000 Hrs @ 105°C	-25 ~ 105	10.00	22.00	42.50	Active	ROHS3
LAQ2G151MELZ40	Nichicon	LAQ	150	±20	400	Not Specified	2000 Hrs @ 105°C	-25 ~ 105	10.00	22.00	42.00	Active	ROHS3
LGN2W151MELZ40	Nichicon	LGN	150	±20	450	Not Specified	3000 Hrs @ 105°C	-25 ~ 105	10.00	22.00	42.00	Active	ROHS3
LGX2W151MELZ40	Nichicon	LGX	150	±20	450	Not Specified	5000 Hrs @ 105°C	-25 ~ 105	10.00	22.00	42.00	Active	ROHS3
LQS2W151MELZ40	Nichicon	LQS	150	±20	450	Not Specified	3000 Hrs @ 105°C	-25 ~ 105	10.00	22.00	42.00	Active	ROHS3

Engineering Selection Recommendations

For Direct Replacement (400 V Applications):

When the 157LBA400M2BF is unavailable and the circuit design specifies 400 V operation, LAQ2G151MELZ40 (Nichicon) is the recommended substitute. This part maintains active product status, is RoHS3 compliant, and provides identical mechanical compatibility. The LAQ2G151MELZ40 operates across an extended temperature range (-25°C to 105°C) compared to the original part (-25°C to 85°C) and maintains the same 150 µF capacitance and ±20% tolerance.

B43501A9157M000 (EPCOS - TDK Electronics) offers superior electrical performance with a 10000-hour lifetime at 85°C and lower ESR (440 mOhm @ 100 Hz), but carries a "Not For New Designs" product status designation, limiting its suitability for new development projects.

For Voltage-Upgraded Applications (450 V Capability):

When design requirements permit or benefit from a 450 V voltage rating, the following active-status parts provide direct mechanical compatibility with enhanced electrical performance:

LGX2W151MELZ40 (Nichicon) delivers the highest lifetime rating (5000 hours @ 105°C) among 450 V substitutes and maintains active product status. This part is suitable for applications requiring extended operational life and higher temperature tolerance.

450VXG150MEFCSN22X40 (Rubycon) and ELXS451VSN151MP40S (Chemi-Con) both provide 5000-hour lifetime ratings at 105°C with active product status. ELXS451VSN151MP40S exhibits a maximum seated height of 42.50 mm, which is 0.50 mm greater than the original specification and must be verified for clearance compatibility in space-constrained applications.

B43508A5157M000 (EPCOS - TDK Electronics) is a 450 V alternative with active product status and extended operating temperature range (-40°C to 105°C), suitable for applications requiring low-temperature operation.

All substitute parts maintain RoHS3 compliance and are suitable for direct PCB mounting using existing through-hole footprints with 10.00 mm lead spacing.

Frequently Asked Questions (FAQ)

Q1: Can I use a 450 V rated capacitor in a circuit designed for 400 V operation?

A: Yes. A 450 V rated capacitor is backward compatible with 400 V circuit applications. The higher voltage rating provides additional design margin and does not affect circuit functionality. All 450 V substitutes listed maintain identical capacitance (150 µF), tolerance (±20%), and mechanical dimensions as the original 400 V part.

Q2: What is the significance of ESR (Equivalent Series Resistance) in capacitor substitution?

A: ESR affects ripple current handling, heat generation, and frequency response. Lower ESR values indicate better high-frequency performance and reduced power dissipation. The original 157LBA400M2BF specifies 1.65786 Ohm @ 120 Hz. B43501A9157M000 provides lower ESR (440 mOhm @ 100 Hz), while other substitutes do not specify ESR values. ESR comparison is relevant only when electrical performance optimization is a design objective.

Q3: Why do some substitutes have different lifetime ratings?

A: Lifetime ratings (measured in hours at a specified temperature) reflect the capacitor's expected operational duration under defined conditions. The original part specifies 2000 hours @ 85°C. Substitutes with higher lifetime ratings (such as 5000 hours @ 105°C or 10000 hours @ 85°C) indicate extended operational capability and are suitable for applications requiring longer service life or higher temperature operation. Lifetime is a performance characteristic, not a substitution requirement.

Q4: Does the 0.50 mm height difference in ELXS451VSN151MP40S affect compatibility?

A: The ELXS451VSN151MP40S has a maximum seated height of 42.50 mm compared to the standard 42.00 mm specification. This 0.50 mm difference must be verified against PCB clearance requirements, component spacing, and enclosure dimensions. If clearance is adequate, the part is mechanically compatible. If space is constrained, alternative 450 V substitutes with standard 42.00 mm height are available.

Q5: What does "Not For New Designs" product status mean?

A: Parts designated "Not For New Designs" (such as B43501A9157M000 and B43504A9157M000) are mature products that manufacturers no longer recommend for new circuit development. These parts remain available for replacement and repair of existing equipment but should not be selected for new product designs. For new designs, select substitutes with "Active" product status.

Q6: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference are RoHS3 compliant, matching the compliance status of the original 157LBA400M2BF. RoHS3 compliance ensures conformance with hazardous substance restrictions and is required for most commercial and industrial applications.

Q7: Can I interchange parts within the same manufacturer series?

A: Parts within the same manufacturer series (such as Nichicon LGN, LGX, and LQS series) share identical mechanical compatibility and electrical specifications for capacitance, tolerance, voltage, and lead spacing. However, each part number represents a distinct product with specific lifetime, ESR, and temperature characteristics. Substitution must be based on the complete part number and verified electrical parameters, not series designation alone.

Q8: What is the difference between 120 Hz and 100 Hz ESR specifications?

A: ESR values vary with frequency. The original part specifies ESR @ 120 Hz (1.65786 Ohm), while some substitutes specify ESR @ 100 Hz. These frequencies are close but not identical, and ESR values at different frequencies cannot be directly compared. When comparing ESR performance, reference the frequency specification provided for each part.

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