MDL-15/100 Equivalent & Substitute Parts

Part Overview

The MDL-15/100 is a 150 mA slow blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for AC/DC applications and requires a 3AB or 3AG holder with dimensions of 1/4" x 1-1/4" (6.35mm x 31.75mm). The part is currently active in production with 20,199 pieces in stock. Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical form factor, and functional performance parameters to ensure direct interchangeability in circuit protection applications.

Substiute Parts

MDL-15/100

Eaton - Electronics DivisionIn Stock: 20292MDL-15/100 Datasheet

Current PartRFQ

BK/MDL-15/100

Eaton - Electronics DivisionIn Stock: 1056BK/MDL-15/100 Datasheet

Parametric EquivalentRFQ

0034.5209

SCHURTER Inc.In Stock: 10480034.5209 Datasheet

Parametric EquivalentRFQ

0313.150HXP

Littelfuse Inc.In Stock: 12620313.150HXP Datasheet

Parametric EquivalentRFQ

0313.150MXP

Littelfuse Inc.In Stock: 31250313.150MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MDL-15/100 is determined by the following critical parameters:

Electrical Parameters:

• Current Rating: 150 mA (exact match required)
• Response Time: Slow Blow (exact match required)
• Voltage Rating: AC/DC operation capability

Mechanical Parameters:

• Package / Case: 3AB, 3AG form factor (exact match required)
• Physical Dimensions: 0.250" Dia x 1.250" L (exact match required)
• Mounting Type: Requires Holder (exact match required)

Functional Parameters:

• Fuse Type: Cartridge, Glass (exact match required)

All substitute parts listed maintain identical electrical and mechanical specifications to the MDL-15/100, ensuring direct replacement capability within the same circuit protection application without modification to holder or mounting infrastructure.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - Active Status Parts:

The 0313.150HXP and 0313.150MXP (Littelfuse Inc., Series 313) are recommended as primary substitutes for the MDL-15/100. Both parts maintain active product status and carry CE, CSA, and UL approvals. These parts are ROHS3 compliant and operate across the -55°C to 125°C temperature range. The 0313.150MXP offers the highest current inventory level at 3,082 pieces.

Secondary Selection - Eaton Alternative:

The BK/MDL-15/100 (Eaton - Electronics Division) is an active equivalent from the same manufacturer. This part maintains the MDL series designation and active product status. However, it is RoHS non-compliant, which may be a consideration for applications requiring environmental compliance.

Obsolete Status - Not Recommended:

The 0034.5209 (SCHURTER Inc., Series FST 6.3x32) carries an obsolete product status. While it meets all electrical and mechanical parameters with CSA and UL approvals, the obsolete designation indicates limited future availability and potential supply chain constraints.

Frequently Asked Questions (FAQ)

Q: Can the 0313.150HXP and 0313.150MXP be used interchangeably with the MDL-15/100?

A: Yes. Both Littelfuse parts match the MDL-15/100 in current rating (150 mA), response time (slow blow), fuse type (cartridge glass), package form factor (3AB, 3AG), and physical dimensions (0.250" Dia x 1.250" L). They install in the same holder without modification.

Q: What is the difference between the 0313.150HXP and 0313.150MXP?

A: Both parts are functionally equivalent with identical electrical and mechanical specifications. The primary difference is inventory availability, with the 0313.150MXP having higher stock levels (3,082 pieces versus 1,204 pieces).

Q: Does the MDL-15/100 require a specific holder type?

A: Yes. The MDL-15/100 requires a 3AB or 3AG holder. All substitute parts listed maintain this same requirement. The holder is not included with the fuse and must be sourced separately if not already present in the application.

Q: Are there voltage rating differences between the main part and substitutes?

A: The MDL-15/100 does not specify a voltage rating in the provided data. All substitute parts are rated for 250 V AC. Verify that 250 V AC rating is compatible with your application requirements.

Q: Which substitute part has the best compliance certifications?

A: The 0313.150HXP and 0313.150MXP (Littelfuse) carry the most comprehensive approvals with CE, CSA, and UL certifications. Both are ROHS3 compliant. The BK/MDL-15/100 (Eaton) is not RoHS compliant. The 0034.5209 (SCHURTER) is ROHS3 compliant but carries obsolete status.

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

A: The Littelfuse 0313.150HXP and 0313.150MXP, and SCHURTER 0034.5209 all operate across -55°C to 125°C. The MDL-15/100 and BK/MDL-15/100 do not specify operating temperature ranges.

Q: Is the 0034.5209 a viable substitute despite obsolete status?

A: The 0034.5209 meets all electrical and mechanical requirements and carries CSA and UL approvals. However, obsolete status indicates the manufacturer has discontinued production. Current inventory is available (947 pieces), but future availability cannot be assured. Active alternatives are preferred for new designs or long-term applications.