BK/MDL-30-R Equivalent & Substitute Parts

Part Overview

The BK/MDL-30-R is a 30 A, 32 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is classified as obsolete, requiring identification of active equivalent and substitute parts for ongoing system support and procurement. The fuse is designed for use with 3AB and 3AG holders and features a 1/4" x 1-1/4" form factor. Substitute parts must maintain electrical and mechanical compatibility while meeting current availability and compliance requirements.

Substiute Parts

BK/MDL-30-R

Eaton - Electronics DivisionIn Stock: 1061BK/MDL-30-R Datasheet

Current PartRFQ

BK/MDL-30

Eaton - Electronics DivisionIn Stock: 1580BK/MDL-30 Datasheet

Parametric EquivalentRFQ

MDL-30

Eaton - Electronics DivisionIn Stock: 775MDL-30 Datasheet

Parametric EquivalentRFQ

0313030.HXP

Littelfuse Inc.In Stock: 10590313030.HXP Datasheet

SimilarRFQ

0313030.MXP

Littelfuse Inc.In Stock: 8360313030.MXP Datasheet

Parametric EquivalentRFQ

0313030.VXP

Littelfuse Inc.In Stock: 8190313030.VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence in the following parameters:

• Current Rating: 30 A (exact match required)
• Voltage Rating (AC): 32 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)
• Mounting Type: Requires Holder (exact match required)

All identified substitute parts meet these core electrical and mechanical parameters. Variations in breaking capacity, melting I²t, DC cold resistance, and compliance certifications are noted but do not disqualify substitution eligibility within the specified parameter set.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Eaton - Electronics Division):

BK/MDL-30 and MDL-30 are direct parametric equivalents manufactured by Eaton - Electronics Division. Both parts are active products with identical electrical specifications to the obsolete BK/MDL-30-R. BK/MDL-30 is available in bulk packaging with 1536 units in stock. MDL-30 is also available in bulk packaging with 737 units in stock. Selection between these two Eaton variants should be based on packaging requirements and inventory availability.

Secondary Substitutes (Littelfuse Inc.):

0313030.HXP, 0313030.MXP, and 0313030.VXP are manufactured by Littelfuse Inc. and meet all core electrical and mechanical parameters. These parts are active products with extended operating temperature range (-55°C to 125°C) and RoHS3 compliance. Breaking capacity differs at 300 A versus 1 kA for Eaton parts, and melting I²t is higher at 26900 versus 15581. All three Littelfuse variants are UL-approved and REACH unaffected. Selection among these three should be based on specific application requirements and inventory availability.

Compliance Considerations:

The original BK/MDL-30-R carries CE, CSA, and UL approvals with RoHS compliance. BK/MDL-30 and MDL-30 carry CSA and UL approvals respectively, with RoHS non-compliance noted. Littelfuse variants carry UL approval with RoHS3 compliance. Application-specific compliance requirements should guide final selection.

Frequently Asked Questions (FAQ)

Q: Can BK/MDL-30 or MDL-30 be used as direct replacements for BK/MDL-30-R?

A: Yes. BK/MDL-30 and MDL-30 are parametric equivalents with identical current rating (30 A), voltage rating (32 V AC), fuse type (cartridge, glass), response time (slow blow), package designation (3AB, 3AG), and physical dimensions (0.250" x 1.250"). Both are active products manufactured by Eaton - Electronics Division.

Q: What is the difference between Eaton and Littelfuse substitute options?

A: Eaton variants (BK/MDL-30, MDL-30) maintain the original 1 kA breaking capacity and 15581 melting I²t. Littelfuse variants (0313030.HXP, 0313030.MXP, 0313030.VXP) feature 300 A breaking capacity and 26900 melting I²t, with extended operating temperature range (-55°C to 125°C) and RoHS3 compliance. All meet the core 30 A, 32 V AC/DC, slow-blow, cartridge-glass specifications.

Q: Are the three Littelfuse part numbers (0313030.HXP, 0313030.MXP, 0313030.VXP) interchangeable?

A: Yes. All three Littelfuse parts are parametric equivalents with identical electrical and mechanical specifications. Selection should be based on packaging availability and inventory levels.

Q: What holder types are compatible with these fuses?

A: All substitute parts require 3AB or 3AG holders, consistent with the original BK/MDL-30-R specification. The 1/4" x 1-1/4" form factor is maintained across all equivalents.

Q: Does the difference in breaking capacity affect substitution eligibility?

A: Breaking capacity is not a substitution-limiting parameter for this product category. Eaton parts specify 1 kA breaking capacity while Littelfuse parts specify 300 A. Both meet the core electrical and mechanical requirements. Application-specific circuit protection requirements should guide final selection.

Q: Are RoHS compliance differences significant for substitution?

A: RoHS compliance status varies among substitutes. BK/MDL-30-R is RoHS compliant. BK/MDL-30 and MDL-30 are RoHS non-compliant. Littelfuse variants are RoHS3 compliant. Compliance requirements depend on end-use application and regional regulations.