MQ 1.5TR Equivalent & Substitute Parts

Part Overview

The MQ 1.5TR is a 1.5A 125VAC/VDC board mount axial fuse manufactured by Bel Fuse Inc. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system maintenance and new design implementations. The MQ 1.5TR operates as a fast-blow fuse with through-hole mounting, designed for applications requiring reliable overcurrent protection in both AC and DC circuits.

Substiute Parts

MQ 1.5TR

Bel Fuse Inc.In Stock: 891MQ 1.5TR Datasheet

Current PartRFQ

025101.5NRT1L

Littelfuse Inc.In Stock: 80374025101.5NRT1L Datasheet

DirectRFQ

025101.5MXL

Littelfuse Inc.In Stock: 1550025101.5MXL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MQ 1.5TR is determined by strict equivalence across the following critical parameters:

• Current Rating: 1.5 A (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Fuse Type: Board Mount, Axial configuration (exact match required)
• Breaking Capacity: 50A AC, 300A DC (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The substitute parts identified are manufactured by Littelfuse Inc. and belong to the PICO® II 251 series. Both substitute parts meet all critical electrical and mechanical parameters. Differences in physical dimensions (diameter), melting I²t values, DC cold resistance, and packaging format do not affect functional equivalence for this application category.

Parameter Comparison

Engineering Selection Recommendations

Both Littelfuse Inc. substitute parts (025101.5NRT1L and 025101.5MXL) are functionally equivalent to the obsolete MQ 1.5TR. Selection between these two substitutes is based on packaging and inventory requirements:

025101.5NRT1L is supplied in Cut Tape (CT) packaging with 80,300 pieces in stock. This part carries expanded approval certifications including PSE and TUV in addition to CSA and cURus.

025101.5MXL is supplied in Bulk packaging with 1,533 pieces in stock. This part carries the same expanded approval certifications as the NRT1L variant.

Both substitute parts are ROHS3 compliant and carry active product status, ensuring long-term availability and continued manufacturer support. The substitutes maintain all critical electrical parameters and breaking capacity specifications required for direct replacement in the MQ 1.5TR application.

Frequently Asked Questions (FAQ)

Q: Can 025101.5NRT1L and 025101.5MXL be used interchangeably with MQ 1.5TR?

A: Yes. Both Littelfuse parts meet all critical electrical and mechanical specifications: 1.5A current rating, 125V AC/DC voltage rating, fast-blow response, through-hole mounting, and 50A AC / 300A DC breaking capacity. The difference between these two substitutes is packaging format only.

Q: What is the difference between Cut Tape and Bulk packaging?

A: Cut Tape (CT) packaging is used for automated assembly processes and component handling. Bulk packaging is used for manual assembly or applications requiring loose component distribution. Both packaging formats contain identical components with identical electrical specifications.

Q: Are the physical dimensions of the substitute parts compatible with the original MQ 1.5TR footprint?

A: The substitute parts have a reduced diameter (0.110" vs. 0.125") while maintaining the same length (0.280"). This dimensional difference does not affect functional compatibility for board mount through-hole applications, as the critical mounting parameter is the axial lead spacing and hole diameter accommodation.

Q: What certifications do the substitute parts carry?

A: Both 025101.5NRT1L and 025101.5MXL carry CSA, cURus, PSE, and TUV approvals. The original MQ 1.5TR carried CE, CSA, and cURus approvals. The substitute parts provide expanded regulatory compliance coverage.

Q: Is RoHS compliance a factor in selecting a substitute?

A: The substitute parts are ROHS3 compliant. RoHS compliance status was not specified for the original MQ 1.5TR. If RoHS compliance is required for your application, the Littelfuse substitutes satisfy this requirement.