Eaton MDQ-7-1/2 Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Eaton MDQ-7-1/2 is a 7.5 A, 250 V AC/DC glass cartridge fuse designed for use in 3AB and 3AG fuse holders. This slow-blow fuse cartridge measures 1/4" diameter by 1-1/4" length and provides circuit protection with a 35 A breaking capacity at rated voltage. The MDQ-7-1/2 maintains active product status and is available in bulk packaging with 1018 pieces in current inventory. Equivalent substitute parts are identified to support procurement flexibility and supply chain continuity for applications requiring identical electrical and mechanical specifications.

Substiute Parts

MDQ-7-1/2

Eaton - Electronics DivisionIn Stock: 1029MDQ-7-1/2 Datasheet

Current PartRFQ

BK/MDL-7-1/2-R

Eaton - Electronics DivisionIn Stock: 1207BK/MDL-7-1/2-R Datasheet

Parametric EquivalentRFQ

MDL-7-1/2-R

Eaton - Electronics DivisionIn Stock: 1106MDL-7-1/2-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MDQ-7-1/2 are qualified based on strict electrical and mechanical parameter matching. The following parameters determine substitution eligibility:

Critical Matching Parameters:

• Current Rating: 7.5 A
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Glass
• Response Time: Slow Blow
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4"
• Size / Dimension: 0.250" Dia x 1.250" L (6.35mm x 31.75mm)
• Mounting Type: Requires Holder

All identified substitute parts meet these critical parameters. Variations in breaking capacity, RoHS status, and approval agency certifications do not affect substitution eligibility for the specified electrical and mechanical requirements.

Parameter Comparison

Engineering Selection Recommendations

All three parts—MDQ-7-1/2, BK/MDL-7-1/2-R, and MDL-7-1/2-R—are active products manufactured by Eaton - Electronics Division and meet identical electrical and mechanical specifications for 7.5 A, 250 V AC/DC glass cartridge fuse applications in 3AB and 3AG holders.

MDQ-7-1/2 carries CSA and UL approval certifications and features a 35 A breaking capacity specification. This part is suitable for applications requiring documented approval agency compliance.

BK/MDL-7-1/2-R and MDL-7-1/2-R are functionally equivalent alternatives from the MDL series. BK/MDL-7-1/2-R is ROHS3 Compliant with MSL 1 (Unlimited) rating and REACH Unaffected status. MDL-7-1/2-R is RoHS Compliant. Both parts support supply chain flexibility and are available in comparable inventory quantities.

Selection between these parts depends on specific application requirements regarding approval certifications and regulatory compliance status. All three parts are interchangeable based on electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can BK/MDL-7-1/2-R and MDL-7-1/2-R be used interchangeably with MDQ-7-1/2?

A: Yes. All three parts share identical electrical ratings (7.5 A, 250 V AC/DC), fuse type (Cartridge, Glass), response time (Slow Blow), and physical dimensions (0.250" Dia x 1.250" L). They are compatible with the same 3AB and 3AG fuse holders.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by matching current rating (7.5 A), voltage rating (250 V AC), fuse type (Cartridge, Glass), response time (Slow Blow), package designation (3AB, 3AG), and physical dimensions (0.250" Dia x 1.250" L). All substitute parts meet these criteria.

Q: Are there differences in approval certifications between these parts?

A: MDQ-7-1/2 carries CSA and UL approvals. BK/MDL-7-1/2-R and MDL-7-1/2-R do not list approval agency certifications in their specifications. Applications requiring specific approval documentation should reference MDQ-7-1/2.

Q: What is the difference between BK/MDL-7-1/2-R and MDL-7-1/2-R?

A: Both parts are electrically and mechanically identical. BK/MDL-7-1/2-R is ROHS3 Compliant with MSL 1 (Unlimited) and REACH Unaffected status. MDL-7-1/2-R is RoHS Compliant. Selection depends on specific regulatory or environmental requirements.

Q: Do these fuses require a holder for installation?

A: Yes. All three parts are cartridge fuses that require a 3AB or 3AG fuse holder for installation. They cannot be used without an appropriate holder.

Q: What is the breaking capacity specification?

A: MDQ-7-1/2 specifies 35 A breaking capacity at rated voltage. Breaking capacity specifications are not provided for BK/MDL-7-1/2-R and MDL-7-1/2-R.