Equivalent & Substitute Parts for BK/MDQ-1/16 Glass Cartridge Fuse

Part Overview

The BK/MDQ-1/16 is a 62 mA, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete, requiring identification of active equivalent alternatives for continued system support and procurement. The fuse operates in 3AB and 3AG holder configurations with a 1/4" x 1-1/4" form factor and provides 35 A breaking capacity at rated voltage. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and holder compatibility to ensure direct interchangeability without circuit redesign.

Substiute Parts

BK/MDQ-1/16

Eaton - Electronics DivisionIn Stock: 843BK/MDQ-1/16 Datasheet

Current PartRFQ

0313.062HXP

Littelfuse Inc.In Stock: 10460313.062HXP Datasheet

DirectRFQ

0313.062MXP

Littelfuse Inc.In Stock: 18690313.062MXP Datasheet

Parametric EquivalentRFQ

0313.062VXP

Littelfuse Inc.In Stock: 8650313.062VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/MDQ-1/16 is determined by strict equivalence across the following parameters:

• Current Rating: 62 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Size / Dimension: 0.250" Dia x 1.250" L (exact match required)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)

All three substitute parts—0313.062HXP, 0313.062MXP, and 0313.062VXP—manufactured by Littelfuse Inc. meet these criteria. These components are classified as direct manufacturer equivalents and parametric equivalents, sharing identical electrical and mechanical specifications with the obsolete BK/MDQ-1/16.

Parameter Comparison

Engineering Selection Recommendations

All three Littelfuse substitute parts (0313.062HXP, 0313.062MXP, 0313.062VXP) are suitable replacements for the obsolete BK/MDQ-1/16 based on the following factors:

Product Status: The BK/MDQ-1/16 is obsolete. All substitute parts are active products with current manufacturing support and availability.

Compliance and Certifications: The substitute parts hold CE, CSA, and UL approvals, exceeding the original part's CSA and UL certifications. All substitute parts are ROHS3 compliant, addressing modern regulatory requirements.

Electrical and Mechanical Equivalence: All substitute parts maintain identical current rating (62 mA), voltage rating (250 V AC), fuse type (cartridge, glass), response time (slow blow), package configuration (3AB, 3AG), and physical dimensions (0.250" Dia x 1.250" L).

Holder Compatibility: All substitute parts require the same 3AB and 3AG holder configurations as the original part, ensuring direct installation without mechanical modification.

Availability: Littelfuse substitute parts are in active production with substantial inventory levels (0313.062HXP: 957 pcs, 0313.062MXP: 1837 pcs, 0313.062VXP: 792 pcs).

Selection among the three substitute parts may be based on packaging preference (all listed as Bulk) and internal Littelfuse series designation (all Series 313).

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 0313.062HXP, 0313.062MXP, or 0313.062VXP be used as direct replacements for the BK/MDQ-1/16?

A: Yes. All three Littelfuse parts are direct substitutes. They maintain identical electrical ratings (62 mA, 250 V AC), fuse type (cartridge, glass), response time (slow blow), and mechanical dimensions (0.250" Dia x 1.250" L). They operate in the same 3AB and 3AG holder configurations without circuit modification.

Q: What is the difference between the three Littelfuse substitute parts?

A: The 0313.062HXP, 0313.062MXP, and 0313.062VXP are parametrically equivalent. All share identical electrical and mechanical specifications. Differences exist only in internal Littelfuse product line designation and packaging batch identification. Selection may be based on inventory availability or internal procurement preference.

Q: Are the substitute parts compatible with existing 3AB and 3AG fuse holders?

A: Yes. All substitute parts are designed for 3AB and 3AG holder configurations with 1/4" x 1-1/4" form factor, ensuring mechanical compatibility with existing equipment without holder replacement.

Q: What compliance improvements do the substitute parts offer?

A: The Littelfuse substitutes are ROHS3 compliant, whereas the original BK/MDQ-1/16 is RoHS non-compliant. The substitutes also carry CE certification in addition to CSA and UL approvals, meeting expanded regulatory requirements for modern applications.

Q: Is there a difference in DC cold resistance between the original and substitute parts?

A: The original BK/MDQ-1/16 specifies 83.3 Ohms DC cold resistance, while all Littelfuse substitutes specify 120 Ohms. This difference does not affect fuse operation within the specified electrical parameters and is within acceptable tolerance for cartridge fuse applications.

Q: What is the melting I²t value for these fuses?

A: The original BK/MDQ-1/16 does not specify melting I²t. All Littelfuse substitute parts specify 0.021 melting I²t, providing additional thermal characteristic data for circuit protection analysis.