477LMB400M2EF Equivalent & Substitute Parts

Part Overview

The 477LMB400M2EF is a 470 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 3000 hours of operational life at 105°C. The part is Active status and ROHS3 compliant.

Equivalent and substitute parts are identified when design requirements change, inventory constraints occur, or when upgraded performance specifications are needed. Substitutes must maintain compatibility across capacitance, voltage rating, physical dimensions, mounting type, and thermal specifications.

Key Parameters

Parameter	477LMB400M2EF Value
Capacitance	470 µF
Tolerance	±20%
Voltage - Rated	400 V
ESR (Equivalent Series Resistance)	881.842 mOhm @ 120 Hz
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)
Size / Dimension	1.378" Dia (35.00 mm)
Height - Seated (Max)	1.654" (42.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant
Polarization	Polar

Substitute Part Grouping Explanation

Substitution of the 477LMB400M2EF is determined by the following critical parameters:

Direct Substitution Criteria (Same Voltage Rating - 400 V):

Capacitance: 470 µF (exact match required)
Voltage Rating: 400 V (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Size / Dimension: 1.378" Dia (35.00 mm) (exact match required)
Height - Seated (Max): 1.654" (42.00 mm) (exact match required)
Mounting Type: Through Hole, Radial, Can - Snap-In (exact match required)
Operating Temperature Range: -25°C ~ 105°C (minimum requirement)
Lifetime @ Temperature: 3000 Hrs @ 105°C (minimum requirement)

Upgrade Substitution Criteria (Higher Voltage Rating - 450 V):

Capacitance: 470 µF (exact match required)
Voltage Rating: 450 V (higher rating acceptable for direct replacement)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Size / Dimension: 1.378" Dia (35.00 mm) (exact match required)
Height - Seated (Max): 1.654" (42.00 mm) (exact match required)
Mounting Type: Through Hole, Radial, Can - Snap-In (exact match required)
Operating Temperature Range: -25°C ~ 105°C or -40°C ~ 105°C (acceptable)
Lifetime @ Temperature: 3000 Hrs @ 105°C or higher (acceptable)

Parametric Equivalent Criteria (Same Voltage Rating - 400 V):

Capacitance: 470 µF (exact match required)
Voltage Rating: 400 V (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Size / Dimension: 1.378" Dia (35.00 mm) (exact match required)
Height - Seated (Max): 1.654" (42.00 mm) (exact match required)
Mounting Type: Through Hole, Radial, Can - Snap-In (exact match required)
Operating Temperature Range: -25°C ~ 105°C (minimum requirement)
Lifetime @ Temperature: 3000 Hrs @ 105°C (minimum requirement)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Operating Temp Range	Lead Spacing	Height (Max)	Product Status	Substitution Type
477LMB400M2EF	Cornell Dubilier / Illinois Capacitor	LMB	470 µF	400 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.654" (42.00 mm)	Active	Main Part
LGW2G471MELC40	Nichicon	LGW	470 µF	400 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.575" (40.00 mm)	Active	Direct
450MXG470MEFCSN35X40	Rubycon	MXG	470 µF	450 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.654" (42.00 mm)	Active	Upgrade
450VXH470MEFCSN35X40	Rubycon	VXH	470 µF	450 V	±20%	5000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.654" (42.00 mm)	Active	Upgrade
B43508B5477M000	EPCOS - TDK Electronics	B43508	470 µF	450 V	±20%	3000 Hrs	-40°C ~ 105°C	0.394" (10.00 mm)	1.654" (42.00 mm)	Not For New Designs	Upgrade
B43642B5477M000	EPCOS - TDK Electronics	B43642	470 µF	450 V	±20%	3000 Hrs	-40°C ~ 105°C	0.394" (10.00 mm)	1.654" (42.00 mm)	Active	Upgrade
EKMS451VSN471MA40S	Chemi-Con	KMS	470 µF	450 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.673" (42.50 mm)	Active	Upgrade
LGNW6471MELC40	Nichicon	LGN	470 µF	420 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.654" (42.00 mm)	Active	Upgrade
381LR471M400A042	Cornell Dubilier Electronics (CDE)	381LR	470 µF	400 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.654" (42.00 mm)	Active	Parametric Equivalent
861141386025	Würth Elektronik	WCAP-AI3H	470 µF	400 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.654" (42.00 mm)	Active	Parametric Equivalent
B43254B9477M000	EPCOS - TDK Electronics	B43254	470 µF	400 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.654" (42.00 mm)	Active	Parametric Equivalent

Engineering Selection Recommendations

Direct Substitutes (Same Voltage Rating - 400 V):

The LGW2G471MELC40 from Nichicon is a direct substitute for the 477LMB400M2EF. Both parts share identical electrical specifications: 470 µF capacitance, 400 V voltage rating, ±20% tolerance, and 3000 hours lifetime at 105°C. The LGW2G471MELC40 has a slightly reduced seated height of 1.575" (40.00 mm) compared to 1.654" (42.00 mm), which may provide space advantages in compact designs. Both parts are Active status and ROHS3 compliant.

The parametric equivalents 381LR471M400A042 (Cornell Dubilier Electronics), 861141386025 (Würth Elektronik), and B43254B9477M000 (EPCOS - TDK Electronics) maintain all critical electrical and mechanical parameters of the main part. These parts are suitable for direct replacement when the original part is unavailable. All three are Active status and ROHS3 compliant.

Upgrade Substitutes (Higher Voltage Rating - 450 V):

The 450MXG470MEFCSN35X40 and 450VXH470MEFCSN35X40 from Rubycon provide voltage upgrades to 450 V while maintaining 470 µF capacitance and ±20% tolerance. The 450VXH470MEFCSN35X40 offers extended lifetime of 5000 hours at 105°C compared to 3000 hours. Both are Active status and ROHS3 compliant. These upgrades are suitable for applications requiring higher voltage margins or extended operational life.

The B43642B5477M000 from EPCOS - TDK Electronics is an Active status upgrade to 450 V with 3000 hours lifetime and extended operating temperature range of -40°C ~ 105°C. The B43508B5477M000 from EPCOS - TDK Electronics is also a 450 V upgrade but carries "Not For New Designs" status and should not be selected for new applications.

The EKMS451VSN471MA40S from Chemi-Con is a 450 V upgrade with 3000 hours lifetime and Active status. The LGNW6471MELC40 from Nichicon provides a 420 V upgrade option with Active status.

Compliance and Certification:

All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the regulatory status of the main part 477LMB400M2EF. Parts designated as Active status are suitable for new designs. The B43508B5477M000 carries "Not For New Designs" status and should be avoided for new applications.

Frequently Asked Questions (FAQ)

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

A: Yes. A higher voltage rating provides additional safety margin and is electrically compatible. The 450 V substitute parts (450MXG470MEFCSN35X40, 450VXH470MEFCSN35X40, B43642B5477M000, EKMS451VSN471MA40S, and LGNW6471MELC40) can replace the 400 V 477LMB400M2EF. The circuit will operate safely at the original 400 V design voltage.

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

A: ESR affects ripple current handling and heat generation. The main part 477LMB400M2EF has 881.842 mOhm @ 120 Hz. Lower ESR values indicate better high-frequency performance. When ESR data is not provided for substitute parts, the parts are still electrically compatible if all other parameters match.

Q: Are there height differences between substitute parts?

A: Yes. The LGW2G471MELC40 has a seated height of 1.575" (40.00 mm), while the main part and most other substitutes are 1.654" (42.00 mm). The EKMS451VSN471MA40S is 1.673" (42.50 mm). These minor differences may affect board layout in space-constrained designs. Verify clearance in your specific application.

Q: What does "Not For New Designs" status mean?

A: Parts marked "Not For New Designs" (such as B43508B5477M000) are legacy components that manufacturers no longer recommend for new product development. These parts may have limited future availability. For new designs, select parts with Active status.

Q: Can I substitute a 420 V capacitor for a 400 V capacitor?

A: Yes. The LGNW6471MELC40 rated at 420 V can replace the 400 V 477LMB400M2EF. The 420 V rating provides a small voltage margin above the original 400 V specification.

Q: What is the difference between Direct, Upgrade, and Parametric Equivalent substitutes?

A: Direct substitutes maintain identical voltage ratings (400 V). Upgrade substitutes have higher voltage ratings (420 V or 450 V) and may offer extended lifetime. Parametric equivalents match all electrical and mechanical specifications at the same voltage rating but are from different manufacturers.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the main part 477LMB400M2EF.

Q: What is the lead spacing and why does it matter?

A: Lead spacing is 0.394" (10.00 mm) for all parts listed. This dimension determines the distance between the two radial leads and must match your PCB footprint. All substitute parts maintain this specification.

Q: Can I use a capacitor with longer lifetime (5000 Hrs vs 3000 Hrs)?

A: Yes. The 450VXH470MEFCSN35X40 offers 5000 hours lifetime at 105°C compared to the standard 3000 hours. Extended lifetime provides additional operational margin and is fully compatible as a substitute.

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