Equivalent & Substitute Parts for BK/MDL-V-1

Part Overview

The BK/MDL-V-1 is a 1 A 250 V AC/DC glass cartridge fuse with slow-blow response characteristics, designed for through-hole mounting in 3AB and 3AG package formats. This fuse is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design and procurement requirements. Active alternatives maintain the same electrical ratings and mechanical form factors while offering improved compliance status and availability.

Substiute Parts

BK/MDL-V-1

Eaton - Electronics DivisionIn Stock: 716BK/MDL-V-1 Datasheet

Current PartRFQ

BK/MDL-V-1-R

Eaton - Electronics DivisionIn Stock: 2191BK/MDL-V-1-R Datasheet

DirectRFQ

BK/MDQ-V-1

Eaton - Electronics DivisionIn Stock: 768BK/MDQ-V-1 Datasheet

Parametric EquivalentRFQ

MDL-V-1-R

Eaton - Electronics DivisionIn Stock: 1164MDL-V-1-R Datasheet

Parametric EquivalentRFQ

0315001.HXP

Littelfuse Inc.In Stock: 12350315001.HXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/MDL-V-1 is determined by strict equivalence across the following parameters: current rating (1 A), voltage rating (250 V AC), fuse type (cartridge glass), response time (slow blow), package format (3AB, 3AG), and mounting configuration (through hole). All identified substitutes maintain these core electrical and mechanical specifications, ensuring direct functional compatibility within existing circuit designs and PCB layouts.

The substitute parts are grouped into two categories:

Direct Manufacturer Equivalents (Eaton - Electronics Division): BK/MDL-V-1-R and MDL-V-1-R represent active production variants of the original MDL series, with identical electrical performance and mechanical form factor.

Parametric Equivalent (Cross-Manufacturer): BK/MDQ-V-1 (Eaton MDQ series) and 0315001.HXP (Littelfuse 315 series) provide equivalent electrical and mechanical performance from alternative manufacturers, enabling supply chain flexibility.

Parameter Comparison

Engineering Selection Recommendations

For RoHS Compliance Requirements: BK/MDL-V-1-R, MDL-V-1-R, and 0315001.HXP are ROHS3 compliant and suitable for applications requiring environmental compliance certification. BK/MDQ-V-1 does not meet RoHS compliance standards.

For Extended Regulatory Approval: 0315001.HXP (Littelfuse 315 series) provides the broadest approval agency coverage, including CE, CSA, PSE, and UL certifications, and specifies operating temperature range (-55°C ~ 125°C), making it suitable for applications with defined thermal operating requirements.

For Direct Series Continuity: BK/MDL-V-1-R and MDL-V-1-R maintain the MDL series designation and are active production components from Eaton - Electronics Division, providing direct compatibility with existing design documentation and supply chain relationships.

For Cross-Manufacturer Flexibility: BK/MDQ-V-1 (Eaton MDQ series) and 0315001.HXP (Littelfuse) enable supply chain diversification while maintaining electrical and mechanical equivalence.

Frequently Asked Questions (FAQ)

Q: Can BK/MDL-V-1-R be used as a direct replacement for BK/MDL-V-1?

A: Yes. BK/MDL-V-1-R maintains identical electrical ratings (1 A, 250 V AC), response time (slow blow), mechanical form factor (3AB, 3AG, 1/4" x 1-1/4"), and breaking capacity (35 A). The primary difference is product status (active versus obsolete) and improved RoHS compliance.

Q: What is the difference between BK/MDL-V-1-R and MDL-V-1-R?

A: Both are active Eaton MDL series fuses with identical electrical and mechanical specifications. The designation difference reflects internal Eaton part numbering conventions. Both are functionally equivalent for circuit protection applications.

Q: Is 0315001.HXP mechanically compatible with the original BK/MDL-V-1?

A: 0315001.HXP maintains the same 3AB, 3AG package format and through-hole mounting configuration. Physical dimensions are nominally equivalent (0.275" Dia x 1.275" L versus 0.266" Dia x 1.292" L), with variations within standard manufacturing tolerances for this package class. Mechanical fit in existing fuse holders is confirmed.

Q: Why does 0315001.HXP have a higher melting I²t value (14 versus 11.498)?

A: Melting I²t represents thermal energy absorption characteristics. The higher value in the Littelfuse component reflects different internal construction while maintaining the same 1 A current rating and slow-blow response classification. Both components provide equivalent circuit protection performance at rated current.

Q: Which substitute part should be selected for new designs?

A: For new designs requiring RoHS compliance and extended regulatory approval, 0315001.HXP (Littelfuse 315 series) is recommended due to ROHS3 compliance, CE certification, and specified operating temperature range. For designs maintaining Eaton component standardization, MDL-V-1-R or BK/MDL-V-1-R are appropriate selections.

Q: Are all substitute parts rated for the same breaking capacity?

A: Yes. All identified substitutes maintain a breaking capacity of 35 A at rated voltage (250 V AC), ensuring equivalent fault current interruption capability.