337LBB250M2CD Equivalent & Substitute Parts

Part Overview

The 337LBB250M2CD is a 330 µF, 250 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high-voltage energy storage and filtering in electronic systems. The product maintains an active status in the market with 756 units currently in stock.

Alternative models become necessary when the original component is unavailable, when design requirements mandate extended operating temperature ranges, or when improved electrical characteristics such as lower equivalent series resistance are required for optimized circuit performance.

Substiute Parts

337LBB250M2CD

Cornell Dubilier / Illinois CapacitorIn Stock: 808337LBB250M2CD Datasheet

Current PartRFQ

B43504C2337M000

EPCOS - TDK ElectronicsIn Stock: 1337B43504C2337M000 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 337LBB250M2CD with the EPCOS B43504C2337M000 is valid based on the following electrical and mechanical equivalence criteria:

Matching Parameters:

• Capacitance: 330 µF (identical)
• Voltage Rating: 250 V (identical)
• Tolerance: ±20% (identical)
• Package Style: Radial, Can - Snap-In (identical)
• Mounting: Through Hole (identical)
• Physical Dimensions: 0.984" diameter × 1.260" height (identical)
• Lead Spacing: 0.394" (10.00 mm) (identical)
• Polarization: Polar (identical)
• RoHS Compliance: ROHS3 Compliant (identical)
• Moisture Sensitivity: MSL 1 (identical)

The substitute part B43504C2337M000 provides functional compatibility with improved electrical characteristics and an extended operating temperature range of -40°C to 105°C, compared to the original part's -40°C to 85°C specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (337LBB250M2CD): Use this part for new designs requiring an active product status and unrestricted design flexibility. The Cornell Dubilier / Illinois Capacitor solution maintains full manufacturing support and design-in eligibility.

Alternative Selection (B43504C2337M000): This EPCOS - TDK Electronics substitute is electrically and mechanically compatible for board-level replacement and retrofit applications. The extended operating temperature capability to 105°C accommodates higher thermal environments. However, this part carries a "Not For New Designs" status, restricting its use to legacy system support, repair, and field replacement operations where the original component is unavailable.

Both parts are ROHS3 compliant and maintain identical physical footprints, ensuring direct substitution without printed circuit board layout modifications.

Frequently Asked Questions (FAQ)

Q: Can B43504C2337M000 be used as a direct replacement for 337LBB250M2CD on existing boards?

A: Yes. Both parts are mechanically and electrically equivalent in terms of capacitance (330 µF), voltage rating (250 V), tolerance (±20%), package style (Radial, Can - Snap-In), and physical dimensions (0.984" × 1.260"). The snap-in configuration and 10.00 mm lead spacing are identical, enabling direct board-level substitution without layout changes.

Q: What is the significance of the "Not For New Designs" status on B43504C2337M000?

A: This designation indicates that EPCOS - TDK Electronics does not recommend the B43504C2337M000 for new product development. This part should be reserved for maintenance, repair, and field replacement of existing systems where the original 337LBB250M2CD is unavailable. For new designs, the 337LBB250M2CD is the preferred selection.

Q: What are the electrical differences between these two capacitors?

A: The primary electrical differences are equivalent series resistance (ESR) and the thermal rating point. The B43504C2337M000 exhibits lower ESR (390 mΩ @ 100 Hz) compared to the 337LBB250M2CD (502.38 Ω @ 120 Hz). Additionally, the EPCOS part is rated for 3000 hours at 105°C, while the Cornell Dubilier part is rated for 3000 hours at 85°C. Both maintain identical capacitance and voltage specifications.

Q: Are both parts RoHS compliant?

A: Yes. Both the 337LBB250M2CD and B43504C2337M000 are ROHS3 compliant and carry an unlimited moisture sensitivity level (MSL 1), confirming suitability for standard manufacturing and assembly processes without special environmental controls.

Q: Can I use either part interchangeably in applications requiring operation above 85°C?

A: Only the B43504C2337M000 should be used in applications where sustained operating temperatures exceed 85°C, as it is rated for continuous operation up to 105°C. The 337LBB250M2CD is rated only to 85°C and should not be used in higher-temperature environments.