B43252B337M Equivalent & Substitute Parts

Part Overview

The B43252B337M is a 330 µF, 315 V aluminum electrolytic capacitor manufactured by EPCOS - TDK Electronics in a radial, can snap-in package. This component is rated for 2000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is Active in product status and fully compliant with RoHS3 and REACH regulations.

Equivalent and substitute parts are identified when design requirements allow for higher voltage ratings, extended operational lifetimes, or alternative manufacturer sourcing while maintaining the same capacitance value, tolerance, physical dimensions, and mounting configuration.

Key Parameters

Parameter	Value
Capacitance	330 µF
Tolerance	±20%
Voltage - Rated	315 V
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)
Size / Dimension	1.181" Dia (30.00 mm)
Height - Seated (Max)	1.654" (42.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Polarization	Polar
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the B43252B337M is permissible when the following conditions are met:

Capacitance value remains 330 µF
Tolerance remains ±20%
Voltage rating is equal to or greater than 315 V
Physical dimensions (diameter, height, lead spacing) are identical
Mounting type remains through-hole, radial snap-in configuration
Polarization remains polar
Operating temperature range encompasses or exceeds -25°C to 105°C
RoHS3 and REACH compliance are maintained

The substitute parts listed below meet these criteria. Substitutes are grouped by voltage rating: 400 V and 450 V rated parts offer higher voltage margins and, in most cases, extended operational lifetimes compared to the original 315 V specification.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage (V)	Lifetime @ 105°C	Operating Temp (°C)	Lead Spacing	Size Dia (mm)	Height (mm)	RoHS Status
B43252B337M	EPCOS - TDK Electronics	330 µF	±20%	315	2000 Hrs	-25 ~ 105	10.00	30.00	42.00	RoHS3
B43508B5337M000	EPCOS - TDK Electronics	330 µF	±20%	450	3000 Hrs	-40 ~ 105	10.00	30.00	42.00	RoHS3
B43644A5337M000	EPCOS - TDK Electronics	330 µF	±20%	450	5000 Hrs	-40 ~ 105	10.00	30.00	42.00	RoHS3
381LR331M400K042	Cornell Dubilier Electronics (CDE)	330 µF	±20%	400	3000 Hrs	-25 ~ 105	10.00	30.00	42.00	RoHS3
450VXH330MEFCSN30X40	Rubycon	330 µF	±20%	450	5000 Hrs	-25 ~ 105	10.00	30.00	42.00	RoHS3
ELXS451VSN331MR40S	Chemi-Con	330 µF	±20%	450	5000 Hrs	-25 ~ 105	10.00	30.00	42.00	RoHS3
LGN2W331MELB40	Nichicon	330 µF	±20%	450	3000 Hrs	-25 ~ 105	10.00	30.00	42.00	RoHS3
LQS2W331MELB40	Nichicon	330 µF	±20%	450	3000 Hrs	-25 ~ 105	10.00	30.00	42.00	RoHS3

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and full RoHS3 and REACH compliance. Selection among substitutes should be based on the following criteria derived from provided specifications:

Voltage Margin Consideration: The B43252B337M operates at 315 V. Substitutes rated at 400 V or 450 V provide increased voltage headroom. The 381LR331M400K042 offers a 400 V rating, while B43508B5337M000, B43644A5337M000, 450VXH330MEFCSN30X40, ELXS451VSN331MR40S, LGN2W331MELB40, and LQS2W331MELB40 provide 450 V ratings.

Operational Lifetime: The original part is rated for 2000 hours at 105°C. Substitutes offering extended lifetimes include B43508B5337M000 (3000 Hrs), 381LR331M400K042 (3000 Hrs), LGN2W331MELB40 (3000 Hrs), LQS2W331MELB40 (3000 Hrs), and the highest-rated options: B43644A5337M000, 450VXH330MEFCSN30X40, and ELXS451VSN331MR40S (all 5000 Hrs).

Temperature Range: The original part operates from -25°C to 105°C. Substitutes B43508B5337M000 and B43644A5337M000 extend the lower operating limit to -40°C, providing enhanced cold-temperature performance.

Manufacturer Sourcing: EPCOS - TDK Electronics substitutes (B43508B5337M000, B43644A5337M000) maintain original manufacturer continuity. Alternative manufacturers—Cornell Dubilier Electronics, Rubycon, Chemi-Con, and Nichicon—provide cross-manufacturer options with equivalent electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a 450 V rated capacitor in place of a 315 V rated capacitor?

A: Yes. A higher voltage rating provides increased safety margin and does not degrade circuit performance. The capacitor will function correctly in applications designed for 315 V operation.

Q: Are all substitute parts physically identical to the B43252B337M?

A: Yes. All substitute parts share identical lead spacing (10.00 mm), diameter (30.00 mm), and height (42.00 mm). They are all radial, can snap-in packages suitable for through-hole mounting on the same PCB footprint.

Q: What is the significance of extended lifetime ratings?

A: Lifetime ratings (measured in hours at 105°C) indicate the expected operational duration before capacitance degradation reaches specified limits. Extended lifetimes (3000 Hrs or 5000 Hrs versus 2000 Hrs) provide longer service life in applications with continuous or high-temperature operation.

Q: Do all substitutes maintain RoHS3 and REACH compliance?

A: Yes. All listed substitute parts are RoHS3 Compliant and REACH Unaffected, matching the compliance status of the original B43252B337M.

Q: Can I mix different manufacturers' capacitors in the same circuit?

A: Yes. All substitute parts meet identical electrical and mechanical specifications. Mixing manufacturers is permissible from an engineering standpoint, though design documentation should reflect the specific part number used.

Q: What does ±20% tolerance mean?

A: Tolerance specifies the allowable deviation from the nominal 330 µF capacitance value. A ±20% tolerance means the actual capacitance may range from 264 µF to 396 µF and still meet specification.

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