3AG 1.6-R Equivalent & Substitute Parts

Part Overview

The 3AG 1.6-R is a 1.6 A 250 V AC/DC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc. This component is designed for circuit protection in applications requiring fast response to overcurrent conditions. The fuse operates within a temperature range of -55°C to 125°C and is housed in a 3AB/3AG form factor (1/4" x 1-1/4") that requires a compatible holder for installation. The product maintains Active status with full RoHS3 compliance and international approvals including CE, CSA, cULus, and PSE certifications.

Equivalent and substitute parts are necessary when the primary manufacturer's stock is unavailable, when supply chain optimization is required, or when design flexibility permits selection from multiple qualified sources meeting identical electrical and mechanical specifications.

Substiute Parts

3AG 1.6-R

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

Current PartRFQ

031201.6MXP

Littelfuse Inc.In Stock: 2037031201.6MXP Datasheet

DirectRFQ

FSA-1.6A

OptiFuseIn Stock: 10887FSA-1.6A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3AG 1.6-R is determined by strict equivalence across the following critical parameters:

• 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)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Operating Temperature Range: -55°C to 125°C (minimum requirement)

All substitute parts listed below meet these mandatory criteria and are therefore electrically and mechanically interchangeable with the 3AG 1.6-R in applications where the main part is specified.

Parameter Comparison

Engineering Selection Recommendations

All three parts listed—3AG 1.6-R (Bel Fuse Inc.), 031201.6MXP (Littelfuse Inc.), and FSA-1.6A (OptiFuse)—are Active products with full RoHS3 compliance and international regulatory approvals. Selection among these equivalents may be based on:

• Approval agency requirements specific to the end application (CE, CSA, UL, PSE, KC)
• Supply chain availability and lead time
• Organizational procurement preferences
• Breaking capacity requirements (3AG 1.6-R: 200A; 031201.6MXP and FSA-1.6A: 100A)
• Melting I²t characteristics (3AG 1.6-R: 4.2; FSA-1.6A: 4.026; 031201.6MXP: 2.8)

All parts are mechanically and electrically interchangeable within the specified 3AB/3AG holder form factor and maintain identical electrical performance for standard 1.6 A 250 V AC/DC fast-blow circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Are these parts truly interchangeable? A: Yes. All listed substitute parts meet identical electrical specifications (1.6 A, 250 V AC, fast-blow response) and mechanical requirements (3AB/3AG form factor, 1/4" x 1-1/4" dimensions). They are directly interchangeable in any application where the 3AG 1.6-R is specified.

Q: What is the significance of the different breaking capacities? A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The 3AG 1.6-R has a 200A breaking capacity, while 031201.6MXP and FSA-1.6A have 100A. For applications with fault currents exceeding 100A, the 3AG 1.6-R is the appropriate selection.

Q: Do all parts require the same holder? A: Yes. All parts use the 3AB/3AG form factor and require a compatible 3AB or 3AG holder for installation. Physical dimensions are equivalent within manufacturing tolerances.

Q: Which approvals are most relevant for my application? A: Selection depends on your end-market requirements. CE applies to European markets, CSA/cULus to North American markets, PSE to Japanese markets, and KC to Korean markets. Verify which certifications your application requires.

Q: What is the difference in melting I²t values? A: Melting I²t is a measure of the thermal energy required to melt the fuse element. Variations (4.2, 4.026, 2.8) reflect different fuse element designs. All values are within the fast-blow category for 1.6 A fuses and do not affect interchangeability for standard applications.

Q: Can I use these parts interchangeably in existing designs? A: Yes, provided your application does not have specific requirements for breaking capacity, melting I²t characteristics, or particular regulatory approvals. Verify that the selected substitute meets all design and compliance requirements before implementation.