Equivalent & Substitute Parts for BK/MDL-8 Glass Cartridge Fuse

Part Overview

The BK/MDL-8 is an 8 A, 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 product is currently classified as obsolete, which necessitates identification of active equivalent and substitute parts that maintain identical electrical and mechanical specifications for continued circuit protection applications.

Substiute Parts

BK/MDL-8

Eaton - Electronics DivisionIn Stock: 1098BK/MDL-8 Datasheet

Current PartRFQ

BK/MDL-8-R

Eaton - Electronics DivisionIn Stock: 1191BK/MDL-8-R Datasheet

DirectRFQ

MDL-8-R

Eaton - Electronics DivisionIn Stock: 1179MDL-8-R Datasheet

DirectRFQ

0313008.HXIDP

Littelfuse Inc.In Stock: 11310313008.HXIDP Datasheet

Parametric EquivalentRFQ

0313008.HXP

Littelfuse Inc.In Stock: 34130313008.HXP Datasheet

Parametric EquivalentRFQ

0313008.MXP

Littelfuse Inc.In Stock: 122580313008.MXP Datasheet

Parametric EquivalentRFQ

0313008.VXIDP

Littelfuse Inc.In Stock: 11860313008.VXIDP Datasheet

Parametric EquivalentRFQ

0313008.VXP

Littelfuse Inc.In Stock: 10280313008.VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/MDL-8 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Current Rating: 8 A (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Breaking Capacity: 200 A (exact match required)
• Response Time: Slow Blow (exact match required)

Mechanical Parameters:

• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Physical Dimensions: 0.250" Dia x 1.250" L (exact match required)
• Mounting Type: Requires Holder (exact match required)

All substitute parts listed below meet these criteria. Substitutes are grouped into two categories: direct manufacturer equivalents from Eaton - Electronics Division and parametric equivalents from Littelfuse Inc. Both categories maintain identical electrical performance and mechanical compatibility with the original BK/MDL-8 specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: Eaton Direct Equivalents

BK/MDL-8-R and MDL-8-R are the preferred substitutes for BK/MDL-8. Both are manufactured by Eaton - Electronics Division and maintain identical electrical and mechanical specifications. These parts are active products with ROHS3 compliance and carry approval from CE, CSA, and UL agencies. Selection between BK/MDL-8-R and MDL-8-R depends on packaging requirements; both are available in bulk packaging with substantial inventory levels (1136 and 1132 units respectively).

Secondary Recommendation: Littelfuse Parametric Equivalents

The Littelfuse 313 series parts (0313008.HXIDP, 0313008.HXP, 0313008.MXP, 0313008.VXIDP, 0313008.VXP) are parametric equivalents that meet all electrical and mechanical requirements. These parts are active products with ROHS3 compliance and carry approval from CE, CSA, K-MARK, PSE, and UL agencies. The 0313008.MXP variant has the highest inventory availability (12,200 units). All Littelfuse equivalents are rated for operating temperatures from -55°C to 125°C.

Compliance Considerations

All substitute parts listed are ROHS3 compliant, addressing environmental and regulatory requirements that the obsolete BK/MDL-8 does not meet. All substitutes carry CSA and UL approvals, maintaining the safety certification profile of the original part.

Frequently Asked Questions (FAQ)

Q: Can BK/MDL-8-R be used as a direct replacement for BK/MDL-8?

A: Yes. BK/MDL-8-R is a direct manufacturer equivalent from Eaton - Electronics Division with identical electrical ratings (8 A, 250 V AC), response time (slow blow), breaking capacity (200 A), and mechanical dimensions (0.250" Dia x 1.250" L). Both require 3AB or 3AG holders. The primary difference is product status: BK/MDL-8-R is active and ROHS3 compliant, while BK/MDL-8 is obsolete and non-compliant.

Q: What is the difference between BK/MDL-8-R and MDL-8-R?

A: Both parts are manufactured by Eaton - Electronics Division and share identical electrical and mechanical specifications. The difference lies in part numbering convention. Both are active products with ROHS3 compliance and equivalent inventory availability. Selection between them depends on internal part numbering systems and procurement requirements.

Q: Are Littelfuse 313 series parts compatible with the original BK/MDL-8 holder?

A: Yes. All Littelfuse 313 series substitutes (0313008.HXIDP, 0313008.HXP, 0313008.MXP, 0313008.VXIDP, 0313008.VXP) have identical physical dimensions (0.250" Dia x 1.250" L) and are designed for 3AB and 3AG holders. Mechanical compatibility is guaranteed.

Q: What are the approval agencies for each substitute?

A: Eaton equivalents (BK/MDL-8-R, MDL-8-R) carry CE, CSA, and UL approvals. Littelfuse equivalents carry CE, CSA, K-MARK, PSE, and UL approvals. All substitutes meet or exceed the approval profile of the original BK/MDL-8.

Q: Which substitute has the best inventory availability?

A: The Littelfuse 0313008.MXP has the highest inventory level at 12,200 units. Among Eaton equivalents, BK/MDL-8-R has 1136 units and MDL-8-R has 1132 units in stock.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. The original BK/MDL-8 is RoHS non-compliant, making substitution necessary for applications requiring environmental compliance.

Q: What is the operating temperature range for each substitute?

A: Eaton equivalents (BK/MDL-8-R, MDL-8-R) do not specify an operating temperature range in the provided data. Littelfuse equivalents are rated for -55°C to 125°C operating temperature.