GMA-3.15-R Equivalent & Substitute Parts

Part Overview

The GMA-3.15-R is a fast-blow glass cartridge fuse rated at 3.15 A, 125 V AC/DC, with a 5mm x 20mm form factor. This fuse is designed for use in applications requiring overcurrent protection in low-voltage circuits and must be installed in a compatible fuse holder. The part is currently active in production and maintains full compliance with international safety standards including UL, CSA, and PSE certifications. Identifying equivalent substitute parts ensures continuity of supply and maintains design compatibility across production batches and sourcing scenarios.

Substiute Parts

GMA-3.15-R

Eaton - Electronics DivisionIn Stock: 781GMA-3.15-R Datasheet

Current PartRFQ

BK/GMA-3.15-R

Eaton - Electronics DivisionIn Stock: 1097BK/GMA-3.15-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GMA-3.15-R are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Current Rating: 3.15 A (exact match required)
• Voltage Rating (AC): 125 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Breaking Capacity @ Rated Voltage: 10 kA (exact match required)
• Melting I²t: 9.7 (exact match required)
• DC Cold Resistance: 0.036 Ohms (exact match required)

The substitute part BK/GMA-3.15-R meets all critical electrical and mechanical parameters, confirming direct substitution capability within the GMA series from Eaton - Electronics Division.

Parameter Comparison

Engineering Selection Recommendations

Both GMA-3.15-R and BK/GMA-3.15-R are active production parts manufactured by Eaton - Electronics Division and carry identical electrical and mechanical specifications. Selection between these parts may be based on:

Compliance Considerations: The BK/GMA-3.15-R carries ROHS3 Compliant status and includes REACH Unaffected designation, providing additional regulatory documentation for applications requiring enhanced environmental compliance tracking.

Inventory Availability: BK/GMA-3.15-R maintains higher stock levels (1010 Pcs) compared to GMA-3.15-R (692 Pcs), supporting extended lead-time requirements and bulk procurement scenarios.

Functional Equivalence: Both parts are direct substitutes with no functional or performance differentiation. Either part may be selected for new designs or as a replacement component in existing applications without circuit redesign or holder modification.

Frequently Asked Questions (FAQ)

Q: Can BK/GMA-3.15-R be used as a direct replacement for GMA-3.15-R in existing applications?

A: Yes. Both parts are manufactured by Eaton - Electronics Division and share identical electrical ratings (3.15 A, 125 V AC), fuse type (Cartridge, Glass), response time (Fast Blow), physical dimensions (5mm x 20mm), breaking capacity (10 kA), and resistance characteristics (0.036 Ohms). No circuit modifications or holder changes are required.

Q: What are the key parameters that determine substitution eligibility for the GMA-3.15-R?

A: Substitution eligibility is determined by exact matching of: current rating (3.15 A), voltage rating (125 V AC), fuse type (Cartridge, Glass), response time (Fast Blow), package dimensions (5mm x 20mm), breaking capacity (10 kA), melting I²t (9.7), and DC cold resistance (0.036 Ohms). Any deviation in these parameters disqualifies a part from substitution.

Q: Are there differences in regulatory compliance between GMA-3.15-R and BK/GMA-3.15-R?

A: Both parts hold CSA, PSE, and UL certifications. The BK/GMA-3.15-R additionally carries ROHS3 Compliant status and REACH Unaffected designation, providing enhanced environmental compliance documentation. The GMA-3.15-R is RoHS Compliant. Both parts are suitable for applications requiring international safety certifications.

Q: Does the fuse holder compatibility differ between these two parts?

A: No. Both parts require a compatible fuse holder and share identical physical dimensions (0.205" Dia x 0.787" L / 5.20mm x 20.00mm). Either part will function in any holder designed for 5mm x 20mm cartridge fuses.

Q: What is the significance of the melting I²t value of 9.7?

A: The melting I²t value of 9.7 defines the thermal energy required to melt the fuse element and is a critical parameter for circuit protection coordination. Both GMA-3.15-R and BK/GMA-3.15-R share this identical value, ensuring equivalent protection characteristics in series and parallel circuit configurations.

Q: Can these fuses be used in DC applications?

A: Yes. Both parts are rated for 125 V AC/DC operation with a DC cold resistance of 0.036 Ohms. The fast-blow response time applies to both AC and DC fault conditions.