MDL-8-R Glass Cartridge Fuse 8A 250VAC Equivalent & Substitute Parts

Part Overview

The MDL-8-R is an 8 ampere, 250 volt AC/DC glass cartridge fuse manufactured by Eaton Electronics Division. This slow-blow fuse cartridge requires a 3AB or 3AG holder and is designed for circuit protection applications requiring a 1/4" x 1-1/4" form factor. The part maintains active product status with 1132 pieces in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

MDL-8-R

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

Current PartRFQ

BK/MDL-8-R

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

DirectRFQ

0001.2533

SCHURTER Inc.In Stock: 30570001.2533 Datasheet

SimilarRFQ

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

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MDL-8-R are classified into three categories based on electrical and mechanical compatibility:

Direct Manufacturer Equivalent: Parts sharing identical electrical specifications, mechanical form factor, and holder requirements with the main part number.

Parametric Equivalents: Parts meeting all critical electrical parameters (8A current rating, 250V AC voltage rating, slow-blow response, 3AB/3AG package compatibility, 0.250" x 1.250" dimensions) while originating from alternative manufacturers.

Similar Manufacturer Parts: Parts meeting primary electrical specifications with allowable variations in secondary parameters such as DC voltage rating, breaking capacity, or melting I²t values, provided mechanical compatibility is maintained.

Substitution eligibility is determined by the following mandatory criteria:

• Current Rating: 8 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Size / Dimension: 0.250" Dia x 1.250" L (exact match required)

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Equivalent (BK/MDL-8-R): This Eaton part number provides identical electrical and mechanical specifications to the MDL-8-R with equivalent inventory availability. Both parts carry CE, CSA, and UL certifications and maintain ROHS3 compliance. Selection of BK/MDL-8-R is appropriate when Eaton sourcing is required or when inventory of the primary MDL-8-R designation is constrained.

Littelfuse Parametric Equivalents (0313008.HXIDP, 0313008.HXP, 0313008.MXP): These three Littelfuse 313 series parts meet all critical electrical and mechanical parameters required for direct substitution. All three carry expanded approval certifications including K-MARK and PSE in addition to CE, CSA, and UL. Operating temperature range extends to -55°C to 125°C, providing broader environmental capability than the main part. DC cold resistance is lower (0.0111 Ohms versus 0.015 Ohms), indicating improved electrical performance. Melting I²t value of 445 differs from the main part (47.8), reflecting different thermal response characteristics within the slow-blow classification. Inventory levels for these parts range from 1066 to 12200 pieces, supporting high-volume procurement. Selection among these three Littelfuse variants depends on specific application requirements and inventory availability.

SCHURTER Similar Part (0001.2533): This SPT 6.3x32 series fuse from SCHURTER meets the primary electrical specifications of 8A at 250V AC with slow-blow response and 3AB/3AG package compatibility. This part includes DC voltage rating of 63V, providing additional capability for dual-voltage applications. Breaking capacity is significantly higher (1.5kA AC, 20kA DC versus 200A), and operating temperature range is -40°C to 85°C. Melting I²t of 360 differs from the main part. Certification is cURus rather than CE/CSA/UL. This part is suitable for applications requiring enhanced DC voltage capability and higher breaking capacity, with 2973 pieces in inventory.

All substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the main part.

Frequently Asked Questions (FAQ)

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

A: Yes. BK/MDL-8-R is a direct manufacturer equivalent from Eaton Electronics Division with identical electrical specifications (8A, 250V AC), mechanical form factor (3AB/3AG, 1/4" x 1-1/4"), response time (slow-blow), and certifications (CE, CSA, UL). Both parts are ROHS3 compliant and carry equivalent inventory status.

Q: What is the difference between the three Littelfuse parts (0313008.HXIDP, 0313008.HXP, 0313008.MXP)?

A: All three Littelfuse 313 series parts are parametric equivalents with identical electrical and mechanical specifications. The primary difference is inventory availability: 0313008.HXIDP has 1066 pieces, 0313008.HXP has 3358 pieces, and 0313008.MXP has 12200 pieces in stock. Selection should be based on procurement volume requirements and lead time considerations.

Q: Can the SCHURTER 0001.2533 be used in place of MDL-8-R?

A: The SCHURTER 0001.2533 meets the primary electrical specifications (8A, 250V AC, slow-blow) and mechanical compatibility (3AB/3AG package, 1/4" x 1-1/4" dimensions). However, this part includes additional DC voltage rating (63V) and higher breaking capacity (1.5kA AC, 20kA DC). Certification is cURus rather than CE/CSA/UL. Use this part only when the application requires enhanced DC voltage capability and higher breaking capacity, and when cURus certification is acceptable.

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

A: Yes. All substitute parts listed maintain the 3AB/3AG package designation and 0.250" diameter x 1.250" length dimensions, ensuring mechanical compatibility with standard 3AB and 3AG fuse holders.

Q: What is the significance of the melting I²t value differences?

A: Melting I²t represents the thermal energy required to melt the fuse element. The main part MDL-8-R has a melting I²t of 47.8, while Littelfuse parts have 445 and SCHURTER has 360. These differences reflect variations in fuse element design and thermal response characteristics. All parts maintain slow-blow response classification. Consult application-specific thermal requirements to determine if these variations are acceptable.

Q: Which substitute part offers the widest operating temperature range?

A: The Littelfuse parametric equivalents (0313008.HXIDP, 0313008.HXP, 0313008.MXP) offer the widest operating temperature range of -55°C to 125°C, compared to the main part which does not specify operating temperature limits. The SCHURTER part operates from -40°C to 85°C.

Q: Do all substitute parts carry the same regulatory certifications as MDL-8-R?

A: The Littelfuse parts carry expanded certifications (CE, CSA, K-MARK, PSE, UL) that include all certifications held by MDL-8-R plus additional K-MARK and PSE approvals. The SCHURTER part carries cURus certification, which differs from the MDL-8-R certification profile. Verify that cURus certification meets application and regional requirements before selecting the SCHURTER part.