AT-3 Blade Fuse Equivalent & Substitute Parts

Part Overview

The AT-3 is a blade fuse manufactured by Eaton - Bussmann Electrical Division, classified as an AC DC fuse in the blade fuse category. This part is currently obsolete, which necessitates identification of active equivalent components for continued system support and procurement. The AT-3 maintains RoHS compliance and is available in bulk packaging with 740 pieces in current inventory stock.

Substiute Parts

AT-3

Eaton - Bussmann Electrical DivisionIn Stock: 849AT-3 Datasheet

Current PartRFQ

ATC-3

Eaton - Bussmann Electrical DivisionIn Stock: 820ATC-3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete AT-3 is based on electrical and mechanical compatibility within the blade fuse category. The primary substitute, ATC-3, is manufactured by the same supplier (Eaton - Bussmann Electrical Division) and shares the following critical parameters that establish functional equivalence:

Key Substitution Parameters:

• Current Rating: 3 A
• Voltage Rating: 32 V DC
• Fuse Type: Automotive blade configuration
• Package Type: Blade, ATO/ATC form factor
• Response Time: Fast Blow
• RoHS Compliance: Both parts are RoHS compliant
• Regulatory Classification: Both assigned ECCN EAR99 and HTSUS 8536.10.0040

The ATC-3 is an active product with established supply chain availability (771 pieces in stock), making it the direct functional replacement for the obsolete AT-3.

Parameter Comparison

Engineering Selection Recommendations

The ATC-3 is the manufacturer-recommended substitute for the obsolete AT-3. Selection of the ATC-3 is supported by the following engineering factors:

Product Status: The ATC-3 is an active product with confirmed manufacturing continuity and established supply chain availability, whereas the AT-3 is obsolete and subject to inventory depletion.

Regulatory Compliance: Both parts maintain RoHS compliance and share identical ECCN and HTSUS classifications, ensuring regulatory equivalence for procurement and export documentation.

Manufacturer Continuity: Both parts are sourced from Eaton - Bussmann Electrical Division, the same manufacturer, ensuring design consistency and quality standards alignment.

Certification: The ATC-3 carries UL approval agency certification, providing third-party validation of electrical and safety performance characteristics.

For applications currently utilizing the AT-3, transition to the ATC-3 is the appropriate engineering solution to maintain system functionality while ensuring long-term component availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the ATC-3 be used as a direct replacement for the AT-3?

A: Yes. The ATC-3 is the manufacturer-recommended substitute for the obsolete AT-3. Both parts are manufactured by Eaton - Bussmann Electrical Division and share the same regulatory classifications (ECCN EAR99, HTSUS 8536.10.0040) and RoHS compliance status.

Q: What are the electrical specifications of the ATC-3?

A: The ATC-3 is rated for 3 A current at 32 V DC with fast blow response time. Breaking capacity at rated voltage is 1 kA. The part carries UL approval agency certification.

Q: What is the physical form factor of the ATC-3?

A: The ATC-3 uses a blade, ATO/ATC form factor with dimensions of 0.760" L x 0.207" W x 0.492" H (19.30mm x 5.25mm x 12.50mm). The part is violet in color and requires a compatible holder for installation.

Q: Is the ATC-3 RoHS compliant?

A: Yes. The ATC-3 is RoHS compliant, matching the compliance status of the obsolete AT-3.

Q: What is the current inventory status of the ATC-3?

A: The ATC-3 is an active product with 771 pieces in current stock, providing established supply chain availability for procurement.

Q: Are there any other substitutes for the AT-3?

A: The ATC-3 is the primary manufacturer-recommended substitute. Secondary substitutes may include BK/ATC-3, which shares the ATC-3 substitution relationship.

Q: What mounting configuration does the ATC-3 require?

A: The ATC-3 requires a compatible holder for installation. The blade, ATO/ATC form factor is standard for automotive fuse applications and is compatible with standard ATO/ATC fuse holders.