BK/MDL-8/10 Equivalent & Substitute Parts

Part Overview

The BK/MDL-8/10 is an 800 mA, 250 V AC/DC slow-blow glass cartridge fuse in 3AB/3AG package format (1/4" x 1-1/4"). This fuse requires a compatible holder for installation and is classified as obsolete. Due to its obsolete product status, equivalent and substitute parts from active manufacturers are available to maintain circuit protection functionality in existing and new designs.

Substiute Parts

BK/MDL-8/10

Eaton - Electronics DivisionIn Stock: 776BK/MDL-8/10 Datasheet

Current PartRFQ

BK/MDL-8/10-R

Eaton - Electronics DivisionIn Stock: 1477BK/MDL-8/10-R Datasheet

DirectRFQ

MDL-8/10-R

Eaton - Electronics DivisionIn Stock: 1221MDL-8/10-R Datasheet

DirectRFQ

BK/MDQ-8/10

Eaton - Electronics DivisionIn Stock: 1195BK/MDQ-8/10 Datasheet

Parametric EquivalentRFQ

MDQ-8/10

Eaton - Electronics DivisionIn Stock: 727MDQ-8/10 Datasheet

Parametric EquivalentRFQ

0034.5224

SCHURTER Inc.In Stock: 8660034.5224 Datasheet

DirectRFQ

0313.800HXP

Littelfuse Inc.In Stock: 9290313.800HXP Datasheet

Parametric EquivalentRFQ

0313.800MXP

Littelfuse Inc.In Stock: 20030313.800MXP Datasheet

Parametric EquivalentRFQ

0313.800VXP

Littelfuse Inc.In Stock: 10710313.800VXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/MDL-8/10 is determined by strict equivalence across the following parameters:

• Current Rating: 800 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Response Time: Slow Blow (exact match required)
• 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 electrical and mechanical parameters. Substitutes are grouped by manufacturer and product status (active vs. obsolete).

Parameter Comparison

Engineering Selection Recommendations

Eaton Direct Replacements (Same Manufacturer)

BK/MDL-8/10-R and MDL-8/10-R are direct Eaton replacements with active product status. Both maintain the 800 mA, 250 V slow-blow cartridge glass fuse specification. BK/MDL-8/10-R carries ROHS3 compliance, while MDL-8/10-R carries RoHS compliance. These are the primary recommended substitutes for the obsolete BK/MDL-8/10.

Eaton Series Alternatives (Same Manufacturer)

BK/MDQ-8/10 and MDQ-8/10 are parametric equivalents from Eaton's MDQ series with active product status. Both meet all electrical and mechanical requirements. MDQ-8/10 includes CSA and UL approval certifications and specifies 35A breaking capacity at rated voltage.

Cross-Manufacturer Alternatives

0313.800HXP, 0313.800MXP, and 0313.800VXP are Littelfuse 313 series parametric equivalents with active product status and ROHS3 compliance. All three carry CE, CSA, and UL approvals with 35A breaking capacity at rated voltage and -55°C to 125°C operating temperature range. 0313.800MXP has the highest inventory availability (1916 pcs).

0034.5224 is a SCHURTER FST 6.3x32 series parametric equivalent with obsolete product status but ROHS3 compliance and CSA/UL approvals.

Frequently Asked Questions (FAQ)

Q: Can I substitute BK/MDL-8/10 with any of the listed parts?

A: All listed parts meet the required electrical and mechanical parameters: 800 mA current rating, 250 V AC voltage rating, slow-blow response time, cartridge glass fuse type, and 3AB/3AG package format with 1/4" x 1-1/4" dimensions. Physical compatibility with existing fuse holders is ensured by identical package specifications.

Q: What is the difference between the Eaton MDL and MDQ series substitutes?

A: Both MDL and MDQ series meet the core electrical and mechanical parameters. MDQ-8/10 and MDQ-8/10 specify 35A breaking capacity at rated voltage and include CSA and UL approvals. Selection between series depends on specific circuit protection requirements and approval certifications needed for the application.

Q: Are the Littelfuse 0313.800 series parts fully compatible?

A: Yes. The 0313.800HXP, 0313.800MXP, and 0313.800VXP all meet identical electrical specifications (800 mA, 250 V, slow-blow) and physical dimensions (0.250" Dia x 1.250" L). All three carry CE, CSA, and UL approvals with 35A breaking capacity and -55°C to 125°C operating temperature range. Differences exist in melting I²t and DC cold resistance specifications, which are provided in the detailed parameter comparison.

Q: Should I prioritize active or obsolete product status substitutes?

A: Active product status substitutes ensure long-term availability and supply chain continuity. BK/MDL-8/10-R, MDL-8/10-R, BK/MDQ-8/10, MDQ-8/10, 0313.800HXP, 0313.800MXP, and 0313.800VXP all carry active product status.

Q: What RoHS compliance level should I select?

A: ROHS3 compliant parts (BK/MDL-8/10-R, 0034.5224, 0313.800HXP, 0313.800MXP, 0313.800VXP) meet current RoHS 3 directive requirements. Selection depends on regulatory requirements for the end application and target markets.

Q: Does the fuse holder type affect substitution compatibility?

A: No. All substitute parts require the same holder type as the original BK/MDL-8/10. The 3AB and 3AG package designations ensure mechanical compatibility with existing fuse holders designed for 1/4" x 1-1/4" cartridge fuses.

Q: Which substitute has the highest inventory availability?

A: 0313.800MXP (Littelfuse) has 1916 pcs in stock, the highest among all listed substitutes.