Equivalent & Substitute Parts for BK/GMD-150MA

Part Overview

The BK/GMD-150MA is a 150 mA, 250 V AC/DC glass cartridge fuse with a 5mm x 20mm form factor manufactured by Eaton - Electronics Division. This fuse is classified as obsolete product status. The slow-blow response characteristic and 35A breaking capacity at rated voltage make it suitable for circuit protection applications requiring delayed response to transient overcurrent conditions. Due to its obsolete classification, equivalent substitute parts with active product status are available to ensure continued circuit protection capability and supply chain continuity.

Substiute Parts

BK/GMD-150MA

Eaton - Electronics DivisionIn Stock: 782BK/GMD-150MA Datasheet

Current PartRFQ

BK/GMD-150-R

Eaton - Electronics DivisionIn Stock: 1176BK/GMD-150-R Datasheet

DirectRFQ

BK1/GMD-150-R

Eaton - Electronics DivisionIn Stock: 1199BK1/GMD-150-R Datasheet

Parametric EquivalentRFQ

GMD-150-R

Eaton - Electronics DivisionIn Stock: 906GMD-150-R Datasheet

Parametric EquivalentRFQ

0239.150MXP

LittelfuseIn Stock: 10420239.150MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/GMD-150MA is determined by strict equivalence across the following parameters: current rating (150 mA), voltage rating (250 V AC), fuse type (cartridge glass), physical package dimensions (5mm x 20mm), response time characteristic (slow blow), and breaking capacity (35A at rated voltage). All substitute parts maintain identical electrical and mechanical specifications within these core parameters.

The substitute parts are grouped into two categories:

Eaton GMD Series (Active Status): BK/GMD-150-R, BK1/GMD-150-R, and GMD-150-R represent direct manufacturer equivalents with active product status. These parts are manufactured by Eaton - Electronics Division and maintain full parametric compatibility with the obsolete BK/GMD-150MA.

Littelfuse 239 Series (Cross-Manufacturer Alternative): The 0239.150MXP is a parametric equivalent manufactured by Littelfuse. While maintaining identical current, voltage, package, and response characteristics, this part carries different approval certifications (CE and UL versus CSA and UL) and operates across an extended temperature range (-55°C to 125°C).

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Eaton GMD Series): BK/GMD-150-R, BK1/GMD-150-R, and GMD-150-R are direct manufacturer equivalents with active product status. These parts maintain identical electrical characteristics and CSA/UL certifications as the obsolete BK/GMD-150MA. Selection among these three Eaton variants is determined by packaging availability and inventory requirements, as all three are functionally equivalent. All three Eaton substitutes are ROHS3 compliant, addressing environmental regulatory requirements not met by the original obsolete part.

Cross-Manufacturer Alternative: The Littelfuse 0239.150MXP maintains parametric equivalence across all critical electrical and mechanical specifications. This part carries CE and UL certifications and operates across an extended temperature range. The Littelfuse alternative is suitable for applications where cross-manufacturer sourcing is acceptable and where the extended operating temperature range provides operational advantage.

Selection between Eaton and Littelfuse alternatives depends on certification requirements specific to the application. Applications requiring CSA certification must use Eaton GMD series parts. Applications requiring only UL certification may use either manufacturer.

Frequently Asked Questions (FAQ)

Q: Can BK/GMD-150-R, BK1/GMD-150-R, and GMD-150-R be used interchangeably with BK/GMD-150MA?

A: Yes. All three Eaton parts maintain identical current rating (150 mA), voltage rating (250 V AC), fuse type (cartridge glass), package dimensions (5mm x 20mm), response time (slow blow), and breaking capacity (35A). Physical and electrical compatibility is confirmed across these parameters.

Q: What is the difference between BK/GMD-150-R, BK1/GMD-150-R, and GMD-150-R?

A: All three are Eaton GMD series fuses with identical electrical specifications and certifications. Differences are limited to part number designation and packaging format (all listed as bulk). Selection among these three is based on availability and internal part numbering conventions.

Q: Can the Littelfuse 0239.150MXP replace the BK/GMD-150MA?

A: The Littelfuse 0239.150MXP is parametrically equivalent in current rating, voltage, package, and response time. However, it carries CE and UL certifications rather than CSA and UL. Applications requiring CSA certification must use Eaton parts. Applications requiring only UL certification may use the Littelfuse alternative.

Q: What does "requires holder" mean for mounting type?

A: These fuses are cartridge-style components that must be installed in a dedicated fuse holder. The fuse itself does not mount directly to a circuit board or panel; a separate holder assembly is required for proper installation and electrical connection.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts (BK/GMD-150-R, BK1/GMD-150-R, GMD-150-R, and 0239.150MXP) are ROHS3 compliant. The original BK/GMD-150MA is RoHS non-compliant, making the substitutes necessary for applications subject to RoHS requirements.

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

A: Melting I²t is a thermal characteristic that affects fuse response under specific overcurrent conditions. The BK/GMD-150MA, BK/GMD-150-R, and GMD-150-R share a melting I²t of 0.046. The BK1/GMD-150-R has a melting I²t of 0.46, and the Littelfuse 0239.150MXP has a melting I²t of 0.13. These differences may affect response characteristics under specific fault conditions and should be evaluated against application requirements.

Q: What is the operating temperature range for the main part and substitutes?

A: The BK/GMD-150MA and Eaton GMD series substitutes do not specify an operating temperature range in the provided data. The Littelfuse 0239.150MXP operates across -55°C to 125°C. Applications requiring operation outside standard ambient conditions should specify the Littelfuse alternative or confirm temperature suitability with Eaton for the GMD series.