LF-240 Line Filter Equivalent & Substitute Parts

Part Overview

The KEMET LF-240 is a single-phase EMC/EMI line filter rated for 250VDC/VAC at 40A with a two-stage configuration and chassis mount design using threaded post (M6) termination. This component is classified as Last Time Buy, indicating discontinued production status. Identification of equivalent substitute parts is necessary to ensure continued availability for new designs and maintenance applications requiring compatible filtering performance within the specified electrical and mechanical parameters.

Substiute Parts

LF-240

KEMETIn Stock: 997LF-240 Datasheet

Current PartRFQ

TB1-40A0D0

DITIn Stock: 998TB1-40A0D0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LF-240 are identified based on strict equivalence of critical electrical and mechanical parameters. The following parameters must match or exceed the main part specifications:

Critical Matching Parameters:

• Filter Type: Single Phase
• Configuration: Two Stage
• Voltage Rating: 250VDC/VAC minimum
• Current Rating: 40A minimum
• Mounting Type: Chassis Mount

Important Compatibility Parameters:

• Termination Style: Must accommodate M6 threaded post or provide mechanical/electrical equivalence
• RoHS Compliance: ROHS3 Compliant status required
• Operating Temperature: Must support minimum -20°C ~ 45°C range

The DIT TB1-40A0D0 qualifies as a substitute based on matching all critical electrical parameters (250V DC/AC, 40A, two-stage single-phase configuration) and chassis mount design. Termination style differs (terminal block versus threaded post), requiring mechanical interface verification during integration.

Parameter Comparison

Engineering Selection Recommendations

The DIT TB1-40A0D0 serves as an electrical and functional equivalent to the KEMET LF-240 for applications requiring 250V single-phase two-stage EMC/EMI line filtering at 40A with chassis mount configuration.

Electrical Compatibility: All critical voltage and current parameters are identical. Both components meet ROHS3 compliance requirements.

Thermal Performance: The TB1-40A0D0 operates across an extended temperature range (-25°C ~ 85°C) compared to the LF-240 (-20°C ~ 45°C), providing superior thermal margin for industrial applications.

Regulatory Compliance: The TB1-40A0D0 carries multiple approval agencies (CE, cCSAus, ENEC, SEMKO), whereas the LF-240 approval status is not specified. This represents an advantage for applications requiring documented regulatory compliance.

Termination Interface: The primary difference is termination style. The LF-240 uses M6 threaded posts while the TB1-40A0D0 uses terminal block connections. Integration requires mechanical interface adaptation or connector specification during design phase.

Availability: The TB1-40A0D0 maintains Active product status with 917 units in stock, ensuring supply continuity compared to the LF-240 Last Time Buy status.

Frequently Asked Questions (FAQ)

Q: Can the DIT TB1-40A0D0 directly replace the KEMET LF-240 without modification?

A: Electrical and functional substitution is valid. The termination interface differs (terminal block versus M6 threaded post), requiring mechanical adapter or connector specification. Chassis mounting points and overall dimensions must be verified against application requirements.

Q: What are the critical parameters that determine substitution eligibility?

A: Single-phase filter type, two-stage configuration, 250V DC/AC voltage rating, and 40A current capacity are non-negotiable. Chassis mount design is required. Termination style and operating temperature range are secondary considerations that may require design accommodation.

Q: Does the TB1-40A0D0 meet the same regulatory standards as the LF-240?

A: The TB1-40A0D0 carries documented approvals (CE, cCSAus, ENEC, SEMKO). The LF-240 approval status is not specified in available documentation. For applications requiring specific regulatory compliance, approval documentation must be obtained from the respective manufacturers.

Q: Is the extended operating temperature range of the TB1-40A0D0 (-25°C ~ 85°C) a concern for LF-240 replacement?

A: No. The TB1-40A0D0 temperature range encompasses and exceeds the LF-240 specification (-20°C ~ 45°C). This represents improved performance margin for thermal stress conditions.

Q: What inventory status should influence the selection decision?

A: The LF-240 is Last Time Buy with 973 units in stock. The TB1-40A0D0 is Active status with 917 units available. For new designs or long-term production, the TB1-40A0D0 Active status ensures continued supply availability.

Q: Are there mechanical dimension differences between these components?

A: Mechanical dimensions are not provided in the available parameter set. Physical verification of chassis cutout, mounting hole spacing, and overall envelope is required before final integration.