337LBA250M2CD Equivalent & Substitute Parts Reference

Part Overview

The 337LBA250M2CD is a 330 µF, 250 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the LBA series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring through-hole mounting with a 2000-hour lifetime rating at 85°C. The part is currently in active production status with 928 units in stock.

Substitute parts become necessary when the main part reaches end-of-life status, inventory constraints occur, or design requirements necessitate enhanced performance characteristics such as extended lifetime or improved thermal ratings. The identified substitute parts maintain core electrical and mechanical compatibility while offering alternative manufacturing sources and performance enhancements.

Substiute Parts

337LBA250M2CD

Cornell Dubilier / Illinois CapacitorIn Stock: 1017337LBA250M2CD Datasheet

Current PartRFQ

B43231F2337M000

EPCOS - TDK ElectronicsIn Stock: 274125B43231F2337M000 Datasheet

DirectRFQ

B43504C2337M000

EPCOS - TDK ElectronicsIn Stock: 1337B43504C2337M000 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 337LBA250M2CD is determined by strict adherence to the following parameters:

Core Electrical Compatibility Requirements:

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 250 V (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)

Mechanical Compatibility Requirements:

• Package Type: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 0.394" (10.00mm) (exact match required)
• Case Diameter: 0.984" - 1.000" Dia (25.00mm - 25.40mm) (within tolerance range)
• Height (Seated Max): 1.260" (32.00mm) (exact match required)

Environmental & Compliance Requirements:

• RoHS Status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)
• Operating Temperature: Minimum -40°C to 85°C (substitute may exceed upper limit)

Performance Parameters (Secondary Consideration): Substitute parts may offer enhanced performance in ESR, lifetime rating, ripple current capacity, or operating temperature range without compromising primary compatibility.

Two substitute parts meet these criteria:

B43231F2337M000 (EPCOS - TDK Electronics, B43231 Series): Direct equivalent with identical core specifications. Product status is "Not For New Designs," indicating legacy classification. Suitable for replacement in existing applications.

B43504C2337M000 (EPCOS - TDK Electronics, B43504 Series): Upgrade option with enhanced performance characteristics. Offers reduced ESR (390 mOhm @ 100Hz vs. 753.57 mOhm @ 120Hz), extended lifetime (3000 Hrs @ 105°C vs. 2000 Hrs @ 85°C), and expanded operating temperature range (-40°C ~ 105°C vs. -40°C ~ 85°C). Product status is "Not For New Designs."

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Equivalent Performance):

Select B43231F2337M000 when direct functional equivalence is required with no performance enhancement. This part maintains identical electrical specifications (330 µF, 250 V, ±20%, 2000 Hrs @ 85°C) and mechanical dimensions. Although classified as "Not For New Designs," it remains suitable for replacement applications where the original 337LBA250M2CD is specified. Large inventory availability (274,082 units) ensures supply continuity.

For Performance Enhancement (Upgrade Path):

Select B43504C2337M000 when improved thermal performance and extended operational life are beneficial. This upgrade option provides:

• Reduced ESR: 390 mOhm @ 100Hz (compared to 753.57 mOhm @ 120Hz in main part)
• Extended Lifetime: 3000 Hrs @ 105°C (compared to 2000 Hrs @ 85°C)
• Expanded Operating Temperature: -40°C ~ 105°C (compared to -40°C ~ 85°C)

The B43504C2337M000 maintains full mechanical compatibility and all compliance certifications (ROHS3, MSL 1). The marginal case diameter increase (25.40mm vs. 25.00mm) remains within acceptable snap-in tolerances for standard PCB footprints.

Compliance Verification:

All three parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS codes (8532.22.0040). No compliance barriers exist for substitution.

Frequently Asked Questions (FAQ)

Q: Can B43231F2337M000 be used as a direct drop-in replacement for 337LBA250M2CD?

A: Yes. The B43231F2337M000 maintains identical capacitance (330 µF), voltage rating (250 V), tolerance (±20%), package type (Radial, Can - Snap-In), lead spacing (10.00mm), and height (32.00mm). Mechanical and electrical compatibility is confirmed. The case diameter increases from 25.00mm to 25.40mm, which remains within standard snap-in mounting tolerances.

Q: What is the primary difference between B43231F2337M000 and B43504C2337M000?

A: The B43504C2337M000 is an upgrade option offering enhanced performance. Key differences include: ESR reduction from 753.57 mOhm to 390 mOhm, lifetime extension from 2000 Hrs @ 85°C to 3000 Hrs @ 105°C, and operating temperature expansion from 85°C to 105°C maximum. Both maintain identical core electrical specifications and mechanical compatibility.

Q: Are there any PCB layout modifications required when substituting these parts?

A: No. All three parts share identical lead spacing (10.00mm) and height (32.00mm). The case diameter variation (25.00mm to 25.40mm) is negligible for standard snap-in mounting applications and does not require PCB footprint redesign.

Q: Why are the substitute parts classified as "Not For New Designs"?

A: This classification indicates that EPCOS - TDK Electronics has transitioned these series to legacy status. However, this designation does not affect their suitability for replacement applications or existing designs. Both parts remain fully compliant with all environmental and safety standards.

Q: Which substitute part should be selected for high-temperature applications?

A: The B43504C2337M000 is the appropriate choice for applications requiring extended temperature operation. It supports continuous operation up to 105°C with a 3000-hour lifetime rating at that temperature, compared to the main part's 85°C maximum with 2000-hour lifetime.

Q: Are all three parts RoHS3 compliant?

A: Yes. The 337LBA250M2CD, B43231F2337M000, and B43504C2337M000 are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. No compliance barriers exist for substitution in regulated applications.

Q: What is the inventory status for each part?

A: 337LBA250M2CD (main part): 928 units available. B43231F2337M000 (direct substitute): 274,082 units available. B43504C2337M000 (upgrade option): 1,248 units available. The B43231F2337M000 offers the highest inventory availability for sustained supply requirements.