BK/MDL-1/16 Equivalent & Substitute Parts

Part Overview

The BK/MDL-1/16 is a 63 mA, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in 3AB and 3AG holders with dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components to maintain circuit protection functionality in existing and new designs. Substitute parts must maintain electrical compatibility across current rating, voltage rating, response time, and mechanical form factor.

Substiute Parts

BK/MDL-1/16

Eaton - Electronics DivisionIn Stock: 986BK/MDL-1/16 Datasheet

Current PartRFQ

BK/MDL-1/16-R

Eaton - Electronics DivisionIn Stock: 1898BK/MDL-1/16-R Datasheet

DirectRFQ

MDL-1/16-R

Eaton - Electronics DivisionIn Stock: 1176MDL-1/16-R Datasheet

DirectRFQ

0313.062HXP

Littelfuse Inc.In Stock: 10460313.062HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/MDL-1/16 is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Current Rating: 63 mA (or within tolerance range of 62-63 mA for similar designs)
• Voltage Rating: 250 V AC minimum
• Response Time: Slow Blow
• Fuse Type: Cartridge, Glass
• Mechanical Form Factor: 3AB, 3AG holder compatibility, 1/4" x 1-1/4" dimensions
• Breaking Capacity: 35 A @ rated voltage

Substitution Categories:

Direct Equivalents (Eaton - Electronics Division): BK/MDL-1/16-R and MDL-1/16-R are active production variants of the same fuse series with identical electrical specifications and mechanical compatibility. These parts maintain the same current rating, voltage rating, response time, and holder requirements.

Similar Substitute (Cross-Manufacturer): The Littelfuse 0313.062HXP operates at 62 mA, representing a 1 mA variance from the 63 mA rating. This part maintains compatibility with 3AB and 3AG holders and shares identical mechanical dimensions, voltage rating, and response time classification. The 62 mA rating falls within the operational tolerance band for slow-blow glass cartridge fuses in this form factor.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred):

BK/MDL-1/16-R and MDL-1/16-R are the primary substitutes for the obsolete BK/MDL-1/16. Both parts are manufactured by Eaton - Electronics Division and maintain identical electrical and mechanical specifications. BK/MDL-1/16-R carries CE, CSA, and UL certifications and is RoHS3 compliant. MDL-1/16-R also carries CE, CSA, and UL certifications and is RoHS compliant. Both parts are in active production with substantial inventory availability.

For Cross-Manufacturer Substitution:

The Littelfuse 0313.062HXP operates at 62 mA, a 1 mA variance from the original 63 mA specification. This part maintains full mechanical and electrical compatibility with 3AB and 3AG holders. The 0313.062HXP carries CE, CSA, and UL certifications and is RoHS3 compliant. Selection of this part is appropriate when Eaton variants are unavailable, provided the 62 mA rating is acceptable within the circuit design tolerance.

Compliance Considerations:

The original BK/MDL-1/16 is RoHS non-compliant. All active substitutes (BK/MDL-1/16-R, MDL-1/16-R, and 0313.062HXP) are RoHS compliant, meeting current environmental and regulatory requirements for new equipment designs and procurement.

Frequently Asked Questions (FAQ)

Q: Can BK/MDL-1/16-R and MDL-1/16-R be used interchangeably with BK/MDL-1/16?

A: Yes. Both parts are manufactured by Eaton - Electronics Division and maintain identical current rating (63 mA), voltage rating (250 V AC), response time (Slow Blow), fuse type (Cartridge, Glass), and mechanical form factor (3AB, 3AG, 1/4" x 1-1/4"). The primary difference is product status: BK/MDL-1/16-R and MDL-1/16-R are active production parts, while BK/MDL-1/16 is obsolete.

Q: What is the significance of the 1 mA difference between the 63 mA BK/MDL-1/16 and the 62 mA Littelfuse 0313.062HXP?

A: The 1 mA variance represents a 1.6% difference in current rating. For slow-blow glass cartridge fuses in this form factor, this variance falls within the operational tolerance band. The 0313.062HXP maintains identical voltage rating, response time, breaking capacity, and mechanical compatibility. Selection of this part is appropriate when the circuit design accommodates the 62 mA rating.

Q: Are all substitute parts compatible with 3AB and 3AG holders?

A: Yes. All substitute parts listed (BK/MDL-1/16-R, MDL-1/16-R, and 0313.062HXP) are specified for use with 3AB and 3AG holders and share identical mechanical dimensions of 0.250" Dia x 1.250" L (6.35mm x 31.75mm).

Q: What certifications do the substitute parts carry?

A: BK/MDL-1/16-R and MDL-1/16-R carry CE, CSA, and UL certifications. The Littelfuse 0313.062HXP also carries CE, CSA, and UL certifications. All three parts meet current regulatory approval requirements.

Q: Are the substitute parts RoHS compliant?

A: Yes. BK/MDL-1/16-R is ROHS3 compliant. MDL-1/16-R is RoHS compliant. The Littelfuse 0313.062HXP is ROHS3 compliant. The original BK/MDL-1/16 is RoHS non-compliant.

Q: What is the difference in melting I²t between BK/MDL-1/16 and 0313.062HXP?

A: The BK/MDL-1/16 has a melting I²t of 0.0046, while the Littelfuse 0313.062HXP has a melting I²t of 0.021. This difference reflects different thermal characteristics between manufacturers' designs. Both parts maintain the same response time classification (Slow Blow) and breaking capacity (35 A @ rated voltage).

Q: Can I use 0313.062HXP as a direct replacement in all applications?

A: The 0313.062HXP is mechanically and electrically compatible with 3AB and 3AG holders and maintains the same voltage rating and response time. The 62 mA rating is within tolerance of the original 63 mA specification. Compatibility depends on whether the circuit design accepts the 62 mA rating and the different melting I²t characteristic.