B43254B2687M Equivalent & Substitute Parts

Part Overview

The B43254B2687M is a 680 µF, 200 V aluminum electrolytic capacitor manufactured by EPCOS - TDK Electronics in the B43254 series. This radial, can-style snap-in capacitor is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is currently active in production.

Substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative sourcing improves supply chain resilience, or when design requirements allow for compatible alternatives that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	680 µF
Voltage Rating	200 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the B43254B2687M is determined by the following critical parameters:

Capacitance: Must be 680 µF (±20% tolerance acceptable)
Voltage Rating: Minimum 200 V (higher ratings acceptable as upgrades)
Package Type: Radial, Can - Snap-In configuration required
Mounting Type: Through Hole required
Lead Spacing: 0.394" (10.00mm) required
Operating Temperature Range: Must support -40°C ~ 105°C minimum
Lifetime Rating: 3000 Hrs @ 105°C minimum
Polarization: Polar (electrolytic)
RoHS Compliance: ROHS3 Compliant required

The substitute parts listed below meet all critical electrical and mechanical parameters. Physical dimensions (diameter and height) may vary within acceptable tolerances for snap-in mounting applications. The 381LR681M200J032 and LGW2D681MELA35 are direct equivalents at 200 V. The LGN2P681MELA35 is classified as an upgrade due to its higher 220 V voltage rating, which provides additional safety margin in applications rated for 200 V operation.

Parameter Comparison

Parameter	B43254B2687M (EPCOS)	200MXC680MEFCSN25X35 (Rubycon)	381LR681M200J032 (CDE)	LGW2D681MELA35 (Nichicon)	LGN2P681MELA35 (Nichicon)
Capacitance	680 µF	680 µF	680 µF	680 µF	680 µF
Voltage Rating	200 V	200 V	200 V	200 V	220 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Lifetime @ 105°C	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Lead Spacing	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Diameter	1.000" (25.40mm)	0.984" (25.00mm)	0.984" (25.00mm)	0.984" (25.00mm)	0.984" (25.00mm)
Height (Max)	1.457" (37.00mm)	1.457" (37.00mm)	1.457" (37.00mm)	1.378" (35.00mm)	1.457" (37.00mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Not For New Designs	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalents (200 V Rating):

The 381LR681M200J032 (Cornell Dubilier Electronics) and LGW2D681MELA35 (Nichicon) are functionally equivalent to the B43254B2687M. Both parts maintain the same 200 V voltage rating, 680 µF capacitance, and 3000-hour lifetime specification. Both manufacturers are active in production and maintain ROHS3 compliance. The 381LR681M200J032 offers higher ripple current capability (2.42 A @ 120 Hz, 3.45 A @ 20 kHz) compared to the original part (1.79 A @ 120 Hz, 2.774 A @ 20 kHz), making it suitable for applications with elevated ripple current demands. The LGW2D681MELA35 provides comparable ripple current performance (2.65 A @ 120 Hz, 3.975 A @ 50 kHz) with a slightly reduced maximum height of 1.378" (35.00mm).

Alternative with Caution:

The 200MXC680MEFCSN25X35 (Rubycon) meets all electrical and mechanical specifications but carries a "Not For New Designs" product status. This part is suitable only for legacy system maintenance or replacement applications where the original design already incorporates this component.

Upgrade Option (220 V Rating):

The LGN2P681MELA35 (Nichicon) is rated at 220 V, providing a 20 V safety margin above the original 200 V specification. This part is suitable for applications where higher voltage headroom is acceptable or beneficial. All other parameters remain equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a 220 V rated capacitor in place of a 200 V rated capacitor?

A: Yes. The LGN2P681MELA35 (220 V) is a direct substitute for the B43254B2687M (200 V). Higher voltage ratings provide additional safety margin and are electrically compatible with circuits designed for lower voltage ratings, provided the physical dimensions accommodate the snap-in mounting footprint.

Q: What is the significance of the "Not For New Designs" status on the 200MXC680MEFCSN25X35?

A: This designation indicates that Rubycon has discontinued active development and promotion of this part for new applications. It remains available for replacement and legacy support but should not be selected for new circuit designs. Use the 381LR681M200J032 or LGW2D681MELA35 for new designs.

Q: Are there physical dimension differences between substitute parts?

A: Minor variations exist. The B43254B2687M has a diameter of 1.000" (25.40mm), while substitute parts measure 0.984" (25.00mm). The LGW2D681MELA35 has a maximum height of 1.378" (35.00mm) compared to 1.457" (37.00mm) for other parts. These differences are within acceptable tolerances for snap-in mounting applications and do not affect electrical performance or mechanical compatibility.

Q: Which substitute part offers the best ripple current performance?

A: The 381LR681M200J032 provides the highest ripple current ratings at 2.42 A @ 120 Hz and 3.45 A @ 20 kHz. The LGW2D681MELA35 offers comparable performance at 2.65 A @ 120 Hz and 3.975 A @ 50 kHz. Select based on your circuit's specific frequency and ripple current requirements.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the compliance status of the original B43254B2687M.

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