3AG 1.6 Equivalent & Substitute Parts

Part Overview

The 3AG 1.6 is a 1.6 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc. This component is classified as obsolete, requiring identification of active equivalent alternatives for ongoing system support and procurement. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and holder compatibility to ensure direct interchangeability in 3AB and 3AG fuse holder applications.

Substiute Parts

3AG 1.6

Bel Fuse Inc.In Stock: 8253AG 1.6 Datasheet

Current PartRFQ

3AG 1.6-R

Bel Fuse Inc.In Stock: 15693AG 1.6-R Datasheet

DirectRFQ

FSA-1.6A

OptiFuseIn Stock: 10887FSA-1.6A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3AG 1.6 are grouped based on the following critical parameters that determine functional interchangeability:

• Current Rating: 1.6 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Physical Dimensions: 0.250" Dia x 1.252" L (exact match required for holder compatibility)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

Two active substitute parts meet these criteria: 3AG 1.6-R (Bel Fuse Inc.) and FSA-1.6A (OptiFuse). Both maintain identical electrical and mechanical specifications, enabling direct replacement in existing 3AB and 3AG fuse holder assemblies.

Parameter Comparison

Engineering Selection Recommendations

Both 3AG 1.6-R and FSA-1.6A are functionally equivalent substitutes for the obsolete 3AG 1.6 based on matching electrical ratings, mechanical dimensions, and holder compatibility.

3AG 1.6-R (Bel Fuse Inc.) maintains manufacturer continuity with the original part and offers identical breaking capacity (200 A). This part carries ROHS3 compliance and cULus certification, providing regulatory alignment for modern applications.

FSA-1.6A (OptiFuse) provides the highest inventory availability (10830 units) and ROHS3 compliance. The breaking capacity is rated at 100 A, which is lower than the original specification. The melting I²t value (4.026) is marginally lower than the original (4.2), representing a negligible difference within typical application tolerances. This part carries cULus and UL 248 certifications.

Selection between these substitutes should be based on application-specific breaking capacity requirements and regulatory certification needs.

Frequently Asked Questions (FAQ)

Q: Can 3AG 1.6-R and FSA-1.6A be used interchangeably with the original 3AG 1.6?

A: Yes. Both substitute parts maintain identical current ratings (1.6 A), voltage ratings (250 V AC), physical dimensions (0.250" Dia x 1.252" L), and response characteristics (fast blow). They are mechanically and electrically compatible with 3AB and 3AG fuse holders.

Q: What is the significance of the breaking capacity difference between 3AG 1.6-R (200 A) and FSA-1.6A (100 A)?

A: Breaking capacity defines the maximum fault current the fuse can safely interrupt. The 3AG 1.6-R matches the original specification (200 A), while FSA-1.6A is rated at 100 A. Selection depends on the maximum prospective fault current in the application circuit. If the circuit's fault current does not exceed 100 A, FSA-1.6A is suitable. For circuits with higher fault currents, 3AG 1.6-R is required.

Q: Are there RoHS compliance differences between these parts?

A: Yes. The original 3AG 1.6 is RoHS non-compliant. Both substitutes (3AG 1.6-R and FSA-1.6A) are ROHS3 compliant, meeting current environmental regulations for new designs and procurement.

Q: What certifications do these parts carry?

A: 3AG 1.6-R carries CE, CSA, cULus, and PSE certifications. FSA-1.6A carries cULus and UL 248 certifications. Both meet North American (cULus) and international safety standards.

Q: Does the melting I²t difference between FSA-1.6A (4.026) and the original (4.2) affect compatibility?

A: The melting I²t values are within 4.1% of each other, representing a negligible difference for standard circuit protection applications. Both values fall within the tolerance band for 1.6 A fast-blow fuses and do not affect functional interchangeability.

Q: Which substitute part should I select for new designs?

A: For new designs requiring manufacturer continuity and maximum breaking capacity, select 3AG 1.6-R. For applications where breaking capacity of 100 A is sufficient and maximum inventory availability is preferred, select FSA-1.6A. Both parts meet modern RoHS and safety certification requirements.