AGX-15 Equivalent & Substitute Parts Reference

Part Overview

The AGX-15 is a 15 A 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is designed for use in applications requiring overcurrent protection with an 8AG form factor (1/4" x 1"). The part is currently active in production with 717 units in stock.

Identifying equivalent and substitute parts is necessary when the primary AGX-15 becomes unavailable, when supply chain optimization is required, or when alternative sourcing from qualified manufacturers is preferred while maintaining identical electrical and mechanical performance.

Substiute Parts

AGX-15

Eaton - Electronics DivisionIn Stock: 768AGX-15 Datasheet

Current PartRFQ

FSX-15A

OptiFuseIn Stock: 3649FSX-15A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AGX-15 is determined by strict equivalence across the following critical parameters:

• Current Rating: 15 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: 8AG, 1/4" x 1" (exact match required)
• Physical Dimensions: 0.250" Dia x 1.000" L (exact match required)
• Breaking Capacity: 200 A @ rated voltage (exact match required)

The FSX-15A from OptiFuse meets all these criteria and is therefore classified as a parametric equivalent. Both parts share identical electrical specifications, mechanical form factor, and functional performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

AGX-15 (Eaton - Electronics Division)

The AGX-15 is the primary component specification. It carries CSA, cURus, and UL approvals. The part is active in production with established inventory (717 units in stock). RoHS non-compliance status should be evaluated against application requirements.

FSX-15A (OptiFuse)

The FSX-15A is a parametric equivalent substitute. It meets all critical electrical and mechanical specifications. The FSX-15A carries cURus and UL 248 certifications. This part is ROHS3 compliant and REACH unaffected, offering improved environmental compliance compared to the primary part. Inventory availability is higher (3541 units in stock). The FSX-15A is suitable for direct substitution in applications where the specified certifications are acceptable.

Certification Consideration

Both parts carry UL and cURus approvals. The AGX-15 includes CSA certification, while the FSX-15A specifies UL 248. Application requirements should determine whether the specific certification set is critical to component selection.

Frequently Asked Questions (FAQ)

Q: Can the FSX-15A replace the AGX-15 in all applications?

A: The FSX-15A is a parametric equivalent with identical current rating (15 A), voltage rating (250 V AC), fuse type (cartridge, glass), response time (fast blow), package (8AG, 1/4" x 1"), and breaking capacity (200 A). Both parts require the same holder type. Substitution is valid where the certification set (cURus, UL 248) meets application requirements.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by exact equivalence in: current rating, voltage rating, fuse type, response time, package designation, physical dimensions, breaking capacity, and mounting requirements. All nine parameters must match exactly.

Q: Are there differences in compliance or environmental status between these parts?

A: The AGX-15 is RoHS non-compliant. The FSX-15A is ROHS3 compliant and REACH unaffected. Applications subject to RoHS or REACH regulations should specify the FSX-15A. The AGX-15 carries CSA certification; the FSX-15A does not list CSA but includes UL 248 specification.

Q: What is the physical form factor, and does it affect substitution?

A: Both parts use the 8AG form factor with dimensions of 0.250" diameter by 1.000" length (6.35mm x 25.40mm). Both require a fuse holder for installation. The identical form factor ensures mechanical interchangeability.

Q: How do the electrical characteristics compare?

A: Both parts are rated for 15 A at 250 V AC/DC with fast-blow response and 200 A breaking capacity at rated voltage. The AGX-15 specifies 0.005 Ohms DC cold resistance; this specification is not provided for the FSX-15A.

Q: Which part should be selected for new designs?

A: Selection should be based on certification requirements and compliance mandates. For applications requiring ROHS3 compliance or REACH compliance, the FSX-15A is the appropriate choice. For applications requiring CSA certification, the AGX-15 is specified. Both parts meet UL and cURus standards.