B43231B477M Equivalent & Substitute Parts

Part Overview

The B43231B477M is a 470 µF, 315 V aluminum electrolytic capacitor manufactured by EPCOS - TDK Electronics in the B43231 series. This radial, can-style snap-in capacitor is rated for 2000 hours at 85°C and is designed for general-purpose applications. The part is currently active in production with ROHS3 compliance and REACH unaffected status.

Substitute parts are identified when design requirements change, such as increased voltage rating, extended operational temperature range, or improved lifetime specifications at elevated temperatures. All substitute parts maintain the same capacitance value (470 µF), tolerance (±20%), physical dimensions, lead spacing, and mounting configuration as the original part.

Key Parameters

Parameter	Value
Manufacturer Part Number	B43231B477M
Manufacturer	EPCOS - TDK Electronics
Capacitance	470 µF
Tolerance	±20%
Voltage - Rated	315 V
Lifetime @ Temp.	2000 Hrs @ 85°C
Operating Temperature	-25°C ~ 85°C
Lead Spacing	0.394" (10.00 mm)
Size / Dimension	1.378" Dia (35.00 mm)
Height - Seated (Max)	1.457" (37.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the B43231B477M is determined by the following critical parameters that must remain constant across all equivalent parts:

Capacitance: 470 µF (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)
Mounting Type: Through Hole, Radial, Can - Snap-In (exact match required)
Polarization: Polar (exact match required)

Substitute parts may vary in the following parameters while maintaining functional equivalence:

Voltage - Rated: May be equal to or greater than 315 V
Lifetime @ Temp.: May be equal to or greater than 2000 Hrs @ 85°C
Operating Temperature: May extend the upper or lower limits beyond -25°C ~ 85°C
Height - Seated (Max): May vary within ±0.019" (±0.50 mm) tolerance
ESR (Equivalent Series Resistance): May vary based on manufacturer specifications
Ripple Current: May vary based on frequency and manufacturer design

All identified substitute parts meet these criteria and are suitable for direct replacement in applications where the original B43231B477M is specified.

Parameter Comparison

Parameter	B43231B477M	B43644B9477M000	381LQ471M400A032	EKMR451VSN471MA35S	ELHS451VSN471MA35S	LGGW6471MELC35	LGL2W471MELC35	LLG2W471MELC35
Manufacturer	EPCOS - TDK	EPCOS - TDK	Cornell Dubilier	Chemi-Con	Chemi-Con	Nichicon	Nichicon	Nichicon
Capacitance	470 µF	470 µF	470 µF	470 µF	470 µF	470 µF	470 µF	470 µF
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	315 V	400 V	400 V	450 V	450 V	420 V	450 V	450 V
Lifetime @ Temp.	2000 Hrs @ 85°C	5000 Hrs @ 105°C	2000 Hrs @ 105°C	2000 Hrs @ 105°C	5000 Hrs @ 105°C	2000 Hrs @ 105°C	2000 Hrs @ 105°C	2000 Hrs @ 85°C
Operating Temperature	-25°C ~ 85°C	-40°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-40°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 85°C
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Size / Dimension	1.378" Dia (35.00 mm)	1.378" Dia (35.00 mm)	1.378" Dia (35.00 mm)	1.378" Dia (35.00 mm)	1.378" Dia (35.00 mm)	1.378" Dia (35.00 mm)	1.378" Dia (35.00 mm)	1.378" Dia (35.00 mm)
Height - Seated (Max)	1.457" (37.00 mm)	1.457" (37.00 mm)	1.457" (37.00 mm)	1.476" (37.50 mm)	1.476" (37.50 mm)	1.457" (37.00 mm)	1.457" (37.00 mm)	1.457" (37.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed are active products with current manufacturing status and appropriate compliance certifications. Selection among substitute parts should be based on application-specific requirements:

B43644B9477M000 (EPCOS - TDK Electronics): Offers increased voltage rating (400 V) and extended lifetime (5000 Hrs @ 105°C) with expanded operating temperature range (-40°C ~ 105°C). Suitable for applications requiring higher voltage margin and improved thermal performance.

381LQ471M400A032 (Cornell Dubilier Electronics): Provides 400 V rating with 2000 Hrs @ 105°C lifetime and extended operating temperature (-25°C ~ 105°C). Maintains equivalent thermal performance to the original part while offering higher voltage capability.

EKMR451VSN471MA35S (Chemi-Con): Delivers 450 V rating with 2000 Hrs @ 105°C lifetime and extended operating temperature (-25°C ~ 105°C). Height dimension increases to 1.476" (37.50 mm), requiring verification of available board space.

ELHS451VSN471MA35S (Chemi-Con): Provides 450 V rating with extended lifetime (5000 Hrs @ 105°C) and expanded operating temperature range (-40°C ~ 105°C). Height dimension increases to 1.476" (37.50 mm), requiring verification of available board space.

LGGW6471MELC35 (Nichicon): Offers 420 V rating with 2000 Hrs @ 105°C lifetime and extended operating temperature (-25°C ~ 105°C). Maintains original height dimension (1.457" / 37.00 mm).

LGL2W471MELC35 (Nichicon): Delivers 450 V rating with 2000 Hrs @ 105°C lifetime and extended operating temperature (-25°C ~ 105°C). Maintains original height dimension (1.457" / 37.00 mm).

LLG2W471MELC35 (Nichicon): Provides 450 V rating with 2000 Hrs @ 85°C lifetime and operating temperature range (-25°C ~ 85°C). Maintains original height dimension (1.457" / 37.00 mm) and thermal specifications equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher voltage rating than the original B43231B477M?

A: Yes. A higher voltage rating provides additional safety margin in the circuit. All listed substitute parts with 400 V, 420 V, or 450 V ratings are electrically compatible with applications designed for 315 V operation.

Q: What is the significance of the height dimension difference in some substitute parts?

A: EKMR451VSN471MA35S and ELHS451VSN471MA35S have a maximum seated height of 1.476" (37.50 mm) compared to the original 1.457" (37.00 mm). This 0.019" (0.50 mm) increase requires verification that available board space accommodates the taller component. Other substitute parts maintain the original height dimension.

Q: Are all substitute parts ROHS3 compliant?

A: Seven of the eight substitute parts are ROHS3 compliant. ELHS451VSN471MA35S carries RoHS Compliant status. Both certifications indicate compliance with hazardous substance restrictions.

Q: What is the difference between 2000 Hrs @ 85°C and 2000 Hrs @ 105°C lifetime ratings?

A: Both represent 2000-hour operational life at their respective rated temperatures. The 105°C rating indicates the capacitor maintains this lifetime when operated at the higher temperature, providing greater thermal margin in applications with elevated ambient or internal heat generation.

Q: Can I substitute LLG2W471MELC35 if my application operates at 105°C?

A: No. LLG2W471MELC35 is rated for 2000 Hrs @ 85°C with an operating temperature range of -25°C ~ 85°C. For applications requiring 105°C operation, select substitute parts with explicit 105°C temperature ratings: B43644B9477M000, 381LQ471M400A032, EKMR451VSN471MA35S, ELHS451VSN471MA35S, LGGW6471MELC35, or LGL2W471MELC35.

Q: Do all substitute parts have the same lead spacing and mounting footprint?

A: Yes. All substitute parts maintain 0.394" (10.00 mm) lead spacing and radial, can-style snap-in mounting configuration. Physical footprint compatibility is guaranteed for all listed substitutes.

Q: Which substitute part offers the best thermal performance?

A: B43644B9477M000 and ELHS451VSN471MA35S both offer 5000-hour lifetime ratings at 105°C with expanded operating temperature ranges (-40°C ~ 105°C), providing superior thermal performance compared to the original 2000 Hrs @ 85°C specification.

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