B43254A4107M Equivalent & Substitute Parts

Part Overview

The B43254A4107M is a 100 µF, 350 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by EPCOS - TDK Electronics. This component is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is currently active in production with 976 units in stock.

Substitute parts are necessary when the original component becomes unavailable, when design requirements demand enhanced performance characteristics such as higher voltage ratings or extended lifetime ratings, or when alternative manufacturers' components offer equivalent electrical and mechanical specifications within the allowed parameter tolerances.

Key Parameters

Parameter	Value
Capacitance	100 µF
Tolerance	±20%
Voltage - Rated	350 V
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)
Size / Dimension	0.866" Dia (22.00 mm)
Height - Seated (Max)	1.063" (27.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the B43254A4107M is determined by the following criteria:

Mandatory Parameters (Must Match):

Capacitance: 100 µF
Tolerance: ±20%
Lead Spacing: 0.394" (10.00 mm)
Size / Dimension: 0.866" Dia (22.00 mm)
Mounting Type: Through Hole
Package / Case: Radial, Can - Snap-In
Polarization: Polar

Allowable Variations:

Voltage - Rated: Equal to or greater than 350 V
Lifetime @ Temperature: Equal to or greater than 3000 Hrs @ 105°C
Operating Temperature Range: Must encompass or exceed -25°C ~ 105°C
Height - Seated (Max): Within ±0.020" tolerance of 1.063"
RoHS Status: ROHS3 Compliant or equivalent

Substitute parts are grouped into three categories based on voltage rating: 400 V rated components, 420 V rated components, and 450 V rated components. All substitute parts maintain identical mechanical dimensions and lead spacing, ensuring direct PCB compatibility.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Operating Temp Range	Height (Max)	Product Status	RoHS Status
B43254A4107M	EPCOS - TDK	100 µF	350 V	3000 Hrs	-25°C ~ 105°C	1.063"	Active	ROHS3
B43508A9107M000	EPCOS - TDK	100 µF	400 V	3000 Hrs	-40°C ~ 105°C	1.063"	Not For New Designs	ROHS3
B43508A9107M002	EPCOS - TDK	100 µF	400 V	3000 Hrs	-40°C ~ 105°C	1.063"	Active	ROHS3
B43644A9107M000	EPCOS - TDK	100 µF	400 V	5000 Hrs	-40°C ~ 105°C	1.063"	Active	ROHS3
450VXH100MEFCSN22X25	Rubycon	100 µF	450 V	5000 Hrs	-25°C ~ 105°C	1.063"	Active	ROHS3
ELHS451VSN101MP25S	Chemi-Con	100 µF	450 V	5000 Hrs	-40°C ~ 105°C	1.083"	Active	RoHS
ELXQ401VSN101MP25S	Chemi-Con	100 µF	400 V	5000 Hrs	-25°C ~ 105°C	1.063"	Active	RoHS
LGN2G101MELZ25	Nichicon	100 µF	400 V	3000 Hrs	-25°C ~ 105°C	1.063"	Active	ROHS3
LGNW6101MELZ25	Nichicon	100 µF	420 V	3000 Hrs	-25°C ~ 105°C	1.063"	Active	ROHS3
LGX2G101MELZ25	Nichicon	100 µF	400 V	5000 Hrs	-25°C ~ 105°C	1.063"	Active	ROHS3

Engineering Selection Recommendations

Direct Replacement (Same Voltage Rating - 350 V): No substitute parts are available at the 350 V rating. All qualified substitutes operate at higher voltage ratings.

Preferred Substitutes (400 V Rating, Active Status):

B43508A9107M002 (EPCOS - TDK): Active product status, ROHS3 compliant, identical mechanical dimensions, extended operating temperature range (-40°C).
LGN2G101MELZ25 (Nichicon): Active product status, ROHS3 compliant, identical mechanical dimensions and operating temperature range.
LGX2G101MELZ25 (Nichicon): Active product status, ROHS3 compliant, extended lifetime rating (5000 Hrs @ 105°C), identical mechanical dimensions.
ELXQ401VSN101MP25S (Chemi-Con): Active product status, RoHS compliant, extended lifetime rating (5000 Hrs @ 105°C), identical mechanical dimensions.

Higher Voltage Alternatives (420 V - 450 V Rating, Active Status):

LGNW6101MELZ25 (Nichicon): 420 V rating, active product status, ROHS3 compliant, identical mechanical dimensions.
450VXH100MEFCSN22X25 (Rubycon): 450 V rating, active product status, ROHS3 compliant, extended lifetime rating (5000 Hrs @ 105°C).
ELHS451VSN101MP25S (Chemi-Con): 450 V rating, active product status, RoHS compliant, extended lifetime rating (5000 Hrs @ 105°C), height 1.083" (within tolerance).

Not Recommended for New Designs:

B43508A9107M000 (EPCOS - TDK): Product status is "Not For New Designs."

Frequently Asked Questions (FAQ)

Q: Can I use a 400 V rated capacitor in place of the 350 V B43254A4107M? A: Yes. The 400 V rated substitutes (B43508A9107M002, LGN2G101MELZ25, LGX2G101MELZ25, ELXQ401VSN101MP25S) are electrically and mechanically compatible. Higher voltage ratings provide additional safety margin in the circuit.

Q: What is the difference between the 3000 Hrs and 5000 Hrs lifetime ratings? A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C) before capacitance degradation reaches the tolerance limit. The 5000 Hrs rating (B43644A9107M000, LGX2G101MELZ25, 450VXH100MEFCSN22X25, ELHS451VSN101MP25S, ELXQ401VSN101MP25S) provides extended service life compared to the 3000 Hrs rating of the original part.

Q: Are all substitute parts mechanically identical to the B43254A4107M? A: All substitute parts share the same lead spacing (0.394" / 10.00 mm), diameter (0.866" / 22.00 mm), and mounting type (through-hole, radial snap-in). Height varies minimally: most are 1.063" (27.00 mm), with ELHS451VSN101MP25S at 1.083" (27.50 mm), which remains within acceptable PCB layout tolerance.

Q: Which substitute offers the best performance upgrade? A: LGX2G101MELZ25 and B43644A9107M000 offer 5000 Hrs lifetime at 105°C (versus 3000 Hrs), combined with 400 V rating and active product status. These provide extended operational life without mechanical or electrical compromise.

Q: Are all substitutes RoHS compliant? A: All substitute parts are RoHS compliant. EPCOS and Nichicon parts carry ROHS3 certification. Chemi-Con parts carry RoHS certification. Both certifications meet current regulatory requirements.

Q: Can I substitute the B43254A4107M with a 450 V rated part? A: Yes. The 450 V rated substitutes (450VXH100MEFCSN22X25, ELHS451VSN101MP25S) are compatible. The higher voltage rating provides additional circuit protection margin with no electrical or mechanical disadvantage.

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