GDB-400MA Equivalent & Substitute Parts

Part Overview

The GDB-400MA is a 400 mA fast-blow glass cartridge fuse rated for 250 V AC/DC operation in a 5mm x 20mm package form factor. Manufactured by Eaton - Electronics Division, this component is classified as Active product status. The GDB-400MA requires a fuse holder for installation and is designed for applications requiring fast-response overcurrent protection. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and approval agency certifications to ensure direct functional interchangeability in circuit protection applications.

Substiute Parts

GDB-400MA

Eaton - Electronics DivisionIn Stock: 806GDB-400MA Datasheet

Current PartRFQ

BK/S500-400-R

Eaton - Electronics DivisionIn Stock: 1136BK/S500-400-R Datasheet

Parametric EquivalentRFQ

BK1/S500-400-R

Eaton - Electronics DivisionIn Stock: 1533BK1/S500-400-R Datasheet

Parametric EquivalentRFQ

0034.1512

SCHURTER Inc.In Stock: 19800034.1512 Datasheet

Parametric EquivalentRFQ

0217.400HXP

Littelfuse Inc.In Stock: 20070217.400HXP Datasheet

Parametric EquivalentRFQ

0217.400MXP

Littelfuse Inc.In Stock: 16670217.400MXP Datasheet

Parametric EquivalentRFQ

0217.400TXP

Littelfuse Inc.In Stock: 8860217.400TXP Datasheet

Parametric EquivalentRFQ

0617.400MXP

Littelfuse Inc.In Stock: 12930617.400MXP Datasheet

Parametric EquivalentRFQ

FSD-400MA

OptiFuseIn Stock: 4896FSD-400MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GDB-400MA is determined by strict equivalence across the following parameters:

Primary Matching Criteria:

• Current Rating: 400 mA (exact match required)
• Voltage Rating - AC: 250 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: 35A (exact match required)
• Mounting Type: Requires Holder (exact match required)

All substitute parts listed below meet these primary criteria. Secondary parameters such as melting I²t, DC cold resistance, approval agencies, and operating temperature ranges are provided for engineering reference but do not disqualify substitution eligibility when primary criteria are satisfied.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts satisfy the primary electrical and mechanical requirements for direct replacement of the GDB-400MA. Selection among equivalent parts should be based on the following factors:

Certification Alignment: The GDB-400MA carries VDE and UR approvals. Substitute parts offering expanded certification portfolios (such as BK1/S500-400-R with BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE) provide broader regulatory acceptance across international markets. Littelfuse parts (0217.400HXP, 0217.400MXP, 0217.400TXP, 0617.400MXP) include UL certification in addition to international standards.

Product Status: All substitute parts maintain Active product status, ensuring continued availability and manufacturer support.

RoHS Compliance: Substitute parts from Eaton (BK/S500-400-R, BK1/S500-400-R), SCHURTER (0034.1512), Littelfuse (0217.400HXP, 0217.400MXP, 0217.400TXP, 0617.400MXP), and OptiFuse (FSD-400MA) are ROHS3 compliant, meeting environmental regulatory requirements.

Operating Temperature Range: The GDB-400MA does not specify an operating temperature range. Substitute parts from SCHURTER, Littelfuse, and OptiFuse specify -55°C to 125°C operating range, providing defined thermal performance boundaries for applications requiring temperature-dependent reliability data.

Melting I²t Characteristics: Melting I²t values vary among substitutes (ranging from 0.085 to 0.18). While all parts meet the 35A breaking capacity requirement, applications with specific thermal energy dissipation requirements should reference the melting I²t value appropriate to circuit design parameters.

Frequently Asked Questions (FAQ)

Q: Can I substitute the GDB-400MA with any of the listed equivalent parts?

A: Yes. All listed parts are parametric equivalents meeting the primary criteria of 400 mA current rating, 250 V AC voltage rating, fast-blow response, 5mm x 20mm package dimensions, and 35A breaking capacity. Physical installation and electrical performance are interchangeable when used with compatible fuse holders.

Q: What is the difference between the Eaton GDB and S500 series fuses?

A: Both series meet identical electrical and mechanical specifications for the 400 mA 250 V rating. The S500 series (BK/S500-400-R and BK1/S500-400-R) carries expanded international certifications including BSI, CCC, CSA, cULus, IMQ, and SEMKO, compared to the GDB series which carries VDE and UR approvals.

Q: Are there differences in melting I²t values among the substitutes, and does this affect compatibility?

A: Melting I²t values vary among substitutes (0.085 to 0.18). All parts meet the specified 35A breaking capacity at rated voltage. Melting I²t represents the thermal energy required to melt the fuse element and is provided for circuit design reference. Substitution is valid across all listed parts for applications designed to the GDB-400MA specifications.

Q: Do all substitute parts require the same fuse holder as the GDB-400MA?

A: All substitute parts are cartridge-type fuses in the 5mm x 20mm package requiring a holder for installation. Mechanical compatibility with existing fuse holders is ensured by identical package dimensions. Verify holder specifications match the 5mm x 20mm cartridge standard.

Q: Which substitute part offers the broadest international certification coverage?

A: The BK1/S500-400-R from Eaton carries certifications from BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE. Littelfuse parts (0217.400HXP, 0217.400MXP, 0217.400TXP, 0617.400MXP) include UL certification in addition to international standards, providing comprehensive North American and international regulatory acceptance.

Q: Is the GDB-400MA still in production?

A: Yes. The GDB-400MA maintains Active product status with 718 pieces in current inventory. All listed substitute parts also maintain Active status with available inventory ranging from 811 to 4813 pieces.

Q: Can I use the FSD-400MA from OptiFuse as a direct replacement?

A: Yes. The FSD-400MA meets all primary electrical and mechanical parameters. It carries cURus and IEC 60127 certifications and specifies an operating temperature range of -55°C to 125°C. It is ROHS3 compliant and maintains Active product status.