GDA-400MA Equivalent & Substitute Parts Reference

Part Overview

The GDA-400MA is a ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 400 mA at 250 V AC/DC with fast-blow response characteristics. This component is designed for applications requiring overcurrent protection in 5mm x 20mm holder assemblies. The part maintains Active product status with 1085 units in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, design revisions, and supply chain continuity when the primary part becomes unavailable or when alternative certifications are required for specific applications.

Substiute Parts

GDA-400MA

Eaton - Electronics DivisionIn Stock: 1150GDA-400MA Datasheet

Current PartRFQ

BK1/S501-400-R

Eaton - Electronics DivisionIn Stock: 1665BK1/S501-400-R Datasheet

Parametric EquivalentRFQ

FCD-400MA

OptiFuseIn Stock: 5875FCD-400MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GDA-400MA is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Current Rating: 400 mA (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Breaking Capacity @ Rated Voltage: 1.5 kA (exact match required)

Acceptable Variation Parameters:

• Melting I²t: 0.018 to 0.02 (within tolerance range)
• DC Cold Resistance: 2.2 Ohms (nominal specification)
• Approval Agency: CSA, UR, cURus, IEC 60127 (different certifications acceptable)
• RoHS Status: Compliant or unspecified (both acceptable)
• Operating Temperature: Specified or unspecified (both acceptable)

The substitute parts BK1/S501-400-R and FCD-400MA meet all critical matching parameters and are therefore classified as parametric equivalents suitable for direct substitution in applications where the GDA-400MA is specified.

Parameter Comparison

Engineering Selection Recommendations

GDA-400MA (Primary Part): Eaton - Electronics Division manufacture with CSA and UR certifications. Suitable for applications requiring North American regulatory compliance. Active product status ensures continued availability and support.

BK1/S501-400-R (Eaton Equivalent): Eaton - Electronics Division manufacture with CSA and cURus certifications. Provides equivalent electrical and mechanical performance with enhanced regulatory coverage (cURus certification). Higher inventory availability (1631 units) supports procurement continuity. Identical melting I²t specification (0.018) ensures thermal response matching.

FCD-400MA (OptiFuse Equivalent): OptiFuse manufacture with IEC 60127 certification. Provides equivalent electrical and mechanical performance with international standards compliance. Highest inventory availability (5801 units) supports rapid procurement. Melting I²t specification (0.02) falls within acceptable tolerance range. Explicit DC voltage rating (250 V) provides additional specification clarity for dual-voltage applications.

All three parts are Active products suitable for direct substitution based on matching critical electrical parameters, mechanical dimensions, and breaking capacity specifications.

Frequently Asked Questions (FAQ)

Q: Can FCD-400MA replace GDA-400MA in all applications?

A: Yes. The FCD-400MA meets all critical electrical parameters (400 mA, 250 V AC, 1.5 kA breaking capacity, fast-blow response) and mechanical specifications (5mm x 20mm package). The melting I²t value of 0.02 is within acceptable tolerance of the GDA-400MA specification of 0.018. Regulatory compliance differs (IEC 60127 versus CSA/UR), so application-specific certification requirements must be verified.

Q: What is the difference between BK1/S501-400-R and GDA-400MA?

A: Both are Eaton products with identical electrical ratings (400 mA, 250 V AC), fuse type (ceramic cartridge), response time (fast-blow), and mechanical dimensions (5mm x 20mm). The primary difference is certification: GDA-400MA carries CSA and UR approvals, while BK1/S501-400-R carries CSA and cURus approvals. Both are parametric equivalents suitable for direct substitution.

Q: Are these fuses interchangeable in the same holder?

A: Yes. All three substitute parts share identical mechanical specifications: 5mm diameter, 20mm length, and cartridge design. All require a compatible 5mm x 20mm fuse holder. Physical installation is identical across all three parts.

Q: Which substitute part has the best availability?

A: FCD-400MA (OptiFuse) has the highest inventory at 5801 units, followed by BK1/S501-400-R (Eaton) at 1631 units, and GDA-400MA (Eaton) at 1085 units. Availability should be verified at time of procurement.

Q: Does the melting I²t difference between GDA-400MA (0.018) and FCD-400MA (0.02) affect performance?

A: The melting I²t values represent thermal energy required to melt the fuse element. The 0.02 specification of FCD-400MA is within acceptable tolerance of the 0.018 specification of GDA-400MA. Both parts maintain identical current rating (400 mA) and response time (fast-blow), ensuring equivalent overcurrent protection performance in the specified application.

Q: What certifications apply to each part?

A: GDA-400MA carries CSA and UR certifications. BK1/S501-400-R carries CSA and cURus certifications. FCD-400MA carries IEC 60127 certification. Selection should be based on application regulatory requirements.