B43231A2188M Equivalent & Substitute Parts

Part Overview

The B43231A2188M is a 1800 µF, 200 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by EPCOS - TDK Electronics. This component is rated for 2000 hours at 85°C and is designed for general purpose applications. The part is currently active in production with 1159 units in stock.

Substitute parts become necessary when the original component reaches end-of-life status, when supply constraints occur, or when design requirements call for enhanced performance characteristics such as extended lifetime ratings or higher operating temperature ranges.

Key Parameters

Parameter	Value
Capacitance	1800 µF
Voltage Rating	200 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00 mm)
Case Diameter	1.378" (35.00 mm)
Height	1.850" (47.00 mm)
Mounting Type	Through Hole
Operating Temperature Range	-40°C to 85°C
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the B43231A2188M is determined by strict adherence to the following parameters:

Critical Parameters (Must Match):

Capacitance: 1800 µF
Voltage Rating: 200 V or higher
Tolerance: ±20%
Package Type: Radial, Can - Snap-In
Lead Spacing: 0.394" (10.00 mm)
Case Diameter: 1.378" (35.00 mm)
Height: 1.850" (47.00 mm)
Mounting Type: Through Hole
Polarization: Polar

Acceptable Variations:

Operating temperature range may extend beyond -40°C to 85°C
Lifetime rating may exceed 2000 hours at 85°C
ESR and ripple current specifications may differ
Manufacturer may vary

The substitute parts listed below meet all critical parameters and are therefore electrically and mechanically compatible with the B43231A2188M in through-hole applications.

Parameter Comparison

Parameter	B43231A2188M (Main)	B43540A2188M000	380LX182M200A452	LKX2D182MESC45	LLG2E182MELC45
Manufacturer	EPCOS - TDK Electronics	EPCOS - TDK Electronics	Cornell Dubilier Electronics (CDE)	Nichicon	Nichicon
Capacitance	1800 µF	1800 µF	1800 µF	1800 µF	1800 µF
Voltage Rating	200 V	200 V	200 V	200 V	250 V
Tolerance	±20%	±20%	±20%	±20%	±20%
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)
Case Diameter	1.378" (35.00 mm)	1.378" (35.00 mm)	1.378" (35.00 mm)	1.378" (35.00 mm)	1.378" (35.00 mm)
Height	1.850" (47.00 mm)	1.850" (47.00 mm)	1.850" (47.00 mm)	1.850" (47.00 mm)	1.850" (47.00 mm)
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
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 105°C	-40°C to 85°C
Lifetime @ Temp.	2000 Hrs @ 85°C	10000 Hrs @ 85°C	3000 Hrs @ 85°C	2000 Hrs @ 105°C	2000 Hrs @ 85°C
Product Status	Active	Not For New Designs	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Active Production Designs: The LKX2D182MESC45 (Nichicon) and LLG2E182MELC45 (Nichicon) are recommended as primary substitutes. Both parts carry Active product status and ROHS3 compliance. The LKX2D182MESC45 offers extended operating temperature range to 105°C, while the LLG2E182MELC45 provides higher voltage rating at 250 V, offering additional design margin.

For Existing Designs Requiring Direct Replacement: The 380LX182M200A452 (Cornell Dubilier Electronics) is a direct electrical and mechanical equivalent with Active product status. This part maintains identical voltage and capacitance ratings with ROHS3 compliance.

For Legacy System Maintenance: The B43540A2188M000 (EPCOS - TDK Electronics) is mechanically and electrically compatible but carries "Not For New Designs" status. This part is suitable only for replacement in existing systems where the original B43231A2188M is no longer available.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher voltage rating? A: Yes. The LLG2E182MELC45 rated at 250 V is a valid substitute for the 200 V B43231A2188M. Higher voltage ratings provide additional safety margin and are electrically compatible in 200 V applications.

Q: Are all substitute parts mechanically identical? A: Yes. All listed substitutes share identical physical dimensions: 1.378" diameter, 1.850" height, and 0.394" lead spacing. All are snap-in radial can packages suitable for through-hole mounting on standard PCB layouts.

Q: What is the difference between the Nichicon LKX and LLG series? A: The LKX2D182MESC45 operates to 105°C maximum temperature, while the LLG2E182MELC45 operates to 85°C maximum. The LLG series provides higher voltage rating (250 V vs. 200 V). Both are suitable substitutes based on application requirements.

Q: Why is the B43540A2188M000 marked "Not For New Designs"? A: This designation indicates the part is in mature or declining production phase. It remains electrically and mechanically compatible for replacement applications but should not be selected for new product development.

Q: Do all substitutes meet RoHS compliance? A: Yes. All listed substitute parts are ROHS3 compliant, matching the compliance status of the B43231A2188M.

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