Equivalent & Substitute Parts for 0FLA003.T

Part Overview

The 0FLA003.T is a 3A 125VAC slow-blow cartridge fuse manufactured by Littelfuse Inc. in the FLA series. This component is designed for electrical and industrial applications requiring overcurrent protection in AC circuits. The part is currently active in production with 731 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when application requirements permit operation at different voltage ratings while maintaining identical current and physical specifications.

Substiute Parts

0FLA003.T

Littelfuse Inc.In Stock: 8160FLA003.T Datasheet

Current PartRFQ

FNA-3

Eaton - Bussmann Electrical DivisionIn Stock: 920FNA-3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0FLA003.T is determined by the following critical parameters:

• Current Rating: Must be 3A (identical)
• Fuse Type: Must be Cartridge (identical)
• Package / Case: Must be 5AG, 10mm x 38mm (identical physical form factor)
• Size / Dimension: Must be 0.406" Dia x 1.500" L (identical)
• Response Time: Must be Slow Blow (identical)
• Mounting Type: Must require holder (identical)
• Voltage Rating - AC: May differ from 125VAC if application permits higher voltage rating

The FNA-3 manufactured by Eaton - Bussmann Electrical Division meets all mandatory substitution criteria. The primary difference is the voltage rating of 250VAC versus 125VAC on the original part. This higher voltage rating does not prevent substitution in circuits designed for 125VAC operation, as the substitute part maintains all other electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the 0FLA003.T and FNA-3 are active production components with full regulatory compliance. The 0FLA003.T carries UL approval, while the FNA-3 carries CE, CSA, and UL approvals, providing broader international certification coverage. Both parts maintain ROHS compliance and are suitable for electrical and industrial applications.

The FNA-3 is a valid substitute when the primary part is unavailable. The higher voltage rating (250VAC) of the FNA-3 does not compromise performance in 125VAC circuits and provides additional operational margin. Physical compatibility is confirmed through identical package dimensions and form factor.

Frequently Asked Questions (FAQ)

Q: Can the FNA-3 be used as a direct replacement for the 0FLA003.T?

A: Yes. The FNA-3 meets all mandatory substitution criteria: identical 3A current rating, slow-blow response time, 5AG cartridge package, and 10mm x 38mm physical dimensions. The higher 250VAC voltage rating does not prevent operation in 125VAC circuits.

Q: What is the significance of the voltage rating difference?

A: The FNA-3 is rated for 250VAC while the 0FLA003.T is rated for 125VAC. In a 125VAC circuit, the FNA-3 operates within its voltage specification with additional safety margin. Voltage rating indicates the maximum circuit voltage for which the fuse is designed; a higher-rated fuse functions correctly at lower voltages.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 5AG package with dimensions of 0.406" diameter by 1.500" length (10.31mm x 38.10mm). Both require a compatible fuse holder for installation.

Q: Do both parts have the same approval certifications?

A: The 0FLA003.T carries UL approval. The FNA-3 carries CE, CSA, and UL approvals. Both meet the regulatory requirements for electrical and industrial applications.

Q: What is the current rating tolerance for these fuses?

A: Both parts are rated at 3A with slow-blow response characteristics, ensuring identical overcurrent protection behavior in the circuit.