Equivalent & Substitute Parts for BK/TDC180-3

Part Overview

The BK/TDC180-3 is a 3A 240 VAC fast-blow cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete, requiring identification of active equivalent parts for continued system support and procurement. The TDC180 series cartridge fuse is designed for electrical and industrial applications where overcurrent protection is required in AC circuits rated at 240 VAC. As an obsolete product, sourcing alternatives from the active product portfolio ensures long-term availability and supply chain continuity.

Substiute Parts

BK/TDC180-3

Eaton - Electronics DivisionIn Stock: 974BK/TDC180-3 Datasheet

Current PartRFQ

BK/TDC180-3A

Eaton - Electronics DivisionIn Stock: 1083BK/TDC180-3A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/TDC180-3 is based on the following criteria:

Current Rating: The substitute part must maintain the 3A current rating to preserve circuit protection design specifications.

Voltage Rating: The substitute BK/TDC180-3A operates at 264 VAC, which exceeds the original 240 VAC rating. This higher voltage rating is acceptable for substitution because the fuse can safely operate in circuits rated at or below its maximum voltage specification.

Response Time: Both parts maintain fast-blow characteristics, ensuring consistent overcurrent response behavior.

Breaking Capacity: Both parts provide 6kA breaking capacity at their respective rated voltages, maintaining fault current handling capability.

Physical Form Factor: Both parts use the 8AG cartridge format with identical dimensions (0.248" Dia x 1.000" L), ensuring mechanical compatibility with existing holder assemblies.

Approval Certifications: Both parts carry ASTA and CCC approvals, maintaining regulatory compliance standards.

Product Status: The substitute BK/TDC180-3A is active, providing ongoing availability and supply chain support.

Parameter Comparison

Engineering Selection Recommendations

The BK/TDC180-3A is the direct substitute for the obsolete BK/TDC180-3 based on the following engineering criteria:

Electrical Compatibility: Both parts share identical current ratings (3A) and response characteristics (fast-blow). The substitute's higher voltage rating (264 VAC versus 240 VAC) is compatible with 240 VAC circuits, as fuses are rated for operation at or below their maximum voltage specification.

Mechanical Compatibility: Identical physical dimensions and 8AG cartridge format ensure direct fit within existing holder assemblies without modification.

Regulatory Compliance: Both parts maintain ASTA and CCC approvals, preserving compliance with applicable electrical standards.

Supply Chain Continuity: The substitute part is in active production status with confirmed inventory availability (1016 pieces), ensuring reliable procurement for replacement and new applications.

Functional Equivalence: Matching breaking capacity (6kA), mounting requirements, and protection characteristics establish functional equivalence for overcurrent protection applications in electrical and industrial systems.

Frequently Asked Questions (FAQ)

Q: Can the BK/TDC180-3A be used as a direct replacement for the BK/TDC180-3?

A: Yes. The BK/TDC180-3A is a direct substitute. Both parts have identical current ratings (3A), response times (fast-blow), breaking capacity (6kA), and physical dimensions (0.248" Dia x 1.000" L). The substitute's higher voltage rating (264 VAC) is acceptable for 240 VAC circuits.

Q: What is the significance of the voltage rating difference between 240 VAC and 264 VAC?

A: Fuses are rated for operation at or below their maximum voltage specification. The BK/TDC180-3A's 264 VAC rating exceeds the original 240 VAC requirement, making it suitable for use in 240 VAC circuits without compromising safety or performance.

Q: Will the BK/TDC180-3A fit in existing BK/TDC180-3 holder assemblies?

A: Yes. Both parts use the 8AG cartridge format with identical dimensions (0.248" Dia x 1.000" L). No holder modifications are required.

Q: Are both parts certified by the same regulatory agencies?

A: Yes. Both the BK/TDC180-3 and BK/TDC180-3A carry ASTA and CCC approvals, maintaining consistent regulatory compliance.

Q: Why is the BK/TDC180-3 classified as obsolete?

A: The BK/TDC180-3 has been discontinued from active production. The BK/TDC180-3A represents the current active equivalent within the TDC180 series.

Q: What is the inventory status of the substitute part?

A: The BK/TDC180-3A is in active production with 1016 pieces available in new original stock, ensuring reliable procurement availability.

Q: Are there any differences in breaking capacity between the two parts?

A: No. Both parts provide 6kA breaking capacity at their respective rated voltages, maintaining identical fault current handling capability.