BK/GMD-V-400MA Equivalent & Substitute Parts

Part Overview

The BK/GMD-V-400MA is a 400 mA, 250 V AC/DC glass cartridge fuse with 5mm x 20mm axial through-hole mounting. This fuse is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing circuit protection applications. The slow-blow response characteristic and 35A breaking capacity at rated voltage define its operational profile in electronic equipment requiring time-delayed overcurrent protection.

Substiute Parts

BK/GMD-V-400MA

Eaton - Electronics DivisionIn Stock: 1128BK/GMD-V-400MA Datasheet

Current PartRFQ

BK/GMD-V-400-R

Eaton - Electronics DivisionIn Stock: 851BK/GMD-V-400-R Datasheet

DirectRFQ

BK/S506-V-400-R

Eaton - Electronics DivisionIn Stock: 815BK/S506-V-400-R Datasheet

Parametric EquivalentRFQ

0213.400MXEP

Littelfuse Inc.In Stock: 9930213.400MXEP Datasheet

SimilarRFQ

0239.400HXEP

Littelfuse Inc.In Stock: 7920239.400HXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/GMD-V-400MA is determined by strict equivalence in the following parameters:

• Current Rating: 400 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Package / Case: 5mm x 20mm axial (exact match required)
• Mounting Type: Through Hole (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Breaking Capacity: 35A at rated voltage (exact match required)

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalents (Eaton - Electronics Division): Parts maintaining identical electrical and mechanical specifications with active product status.

Parametric Equivalents and Similar Parts (Eaton and Littelfuse): Parts meeting all critical electrical and mechanical parameters with active product status and expanded certification coverage.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: BK/GMD-V-400-R

The BK/GMD-V-400-R is the direct active equivalent from Eaton - Electronics Division. It maintains identical electrical specifications (400 mA, 250 V, 1.2 melting I²t) and mechanical form factor as the obsolete BK/GMD-V-400MA. This part achieves ROHS3 compliance and carries CSA and UL approvals. Inventory availability is 830 units.

Secondary Recommendation: BK/S506-V-400-R

The BK/S506-V-400-R is an active parametric equivalent from Eaton - Electronics Division. It meets all critical electrical and mechanical requirements with identical current, voltage, and breaking capacity ratings. The melting I²t value of 0.872 represents a faster response characteristic within the slow-blow category. This part expands certification coverage to include BSI, CCC, CSA, IMQ, SEMKO, UR, and VDE. Inventory availability is 791 units.

Tertiary Recommendations: Littelfuse 0213.400MXEP and 0239.400HXEP

Both Littelfuse parts meet all critical electrical and mechanical parameters. The 0213.400MXEP (Series 213) provides melting I²t of 1.36 with operating temperature range -55°C to 125°C and certifications from BSI, CCC, CE, CSA, SEMKO, UR, and VDE. The 0239.400HXEP (Series 239) provides melting I²t of 1.49 with identical operating temperature range and certifications from CE, CSA, KC, and UL. Both achieve ROHS3 compliance and REACH unaffected status.

Selection between these options depends on certification requirements for the target application and acceptable variation in melting I²t within the slow-blow response envelope.

Frequently Asked Questions (FAQ)

Q: Can BK/GMD-V-400-R directly replace BK/GMD-V-400MA in existing designs?

A: Yes. The BK/GMD-V-400-R is the direct active equivalent with identical electrical specifications (400 mA, 250 V, 1.2 melting I²t) and mechanical dimensions (5mm x 20mm axial through-hole). No circuit redesign is required.

Q: What is the difference between the melting I²t values in the substitute parts?

A: Melting I²t defines the thermal energy required to melt the fuse element. The BK/GMD-V-400MA and BK/GMD-V-400-R both specify 1.2. The BK/S506-V-400-R specifies 0.872 (faster response), while Littelfuse parts specify 1.36 (0213.400MXEP) and 1.49 (0239.400HXEP). All values maintain slow-blow response classification. Selection depends on circuit protection timing requirements.

Q: Are all substitute parts RoHS compliant?

A: The BK/GMD-V-400MA is RoHS non-compliant. All active substitute parts (BK/GMD-V-400-R, BK/S506-V-400-R, 0213.400MXEP, 0239.400HXEP) are ROHS3 compliant.

Q: Which substitute part has the broadest certification coverage?

A: The BK/S506-V-400-R carries approvals from BSI, CCC, CSA, IMQ, SEMKO, UR, and VDE. The Littelfuse 0213.400MXEP carries approvals from BSI, CCC, CE, CSA, SEMKO, UR, and VDE. Selection depends on specific regional or industry certification requirements.

Q: Can I use Littelfuse parts as direct replacements?

A: Yes, with consideration of dimensional tolerance. The 0213.400MXEP specifies 0.228" Dia x 0.886" L (5.80mm x 22.50mm) and the 0239.400HXEP specifies 0.217" Dia x 0.846" L (5.50mm x 21.50mm), compared to the original 0.218" Dia x 0.831" L (5.54mm x 21.10mm). These minor dimensional variations are within typical through-hole fuse holder tolerances. Verify mechanical fit in the target application.

Q: What is the DC cold resistance significance?

A: DC cold resistance affects circuit behavior during normal operation. The BK/GMD-V-400MA specifies 1.505 Ohms. Substitute parts vary: BK/GMD-V-400-R (1.505 Ohms), BK/S506-V-400-R (0.31 Ohms), 0213.400MXEP (0.535 Ohms), 0239.400HXEP (1.475 Ohms). Lower resistance reduces voltage drop across the fuse during normal operation. Verify compatibility with circuit design specifications.

Q: Are all parts suitable for both AC and DC applications?

A: All parts are rated for 250 V AC/DC operation. Verify that the target application voltage does not exceed 250 V.