MS 2TR Equivalent & Substitute Parts

Part Overview

The MS 2TR is a 2A 125VAC/125VDC board mount axial fuse manufactured by Bel Fuse Inc. with slow blow response characteristics. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MS 2TR serves as a protective component in through-hole applications requiring axial package configuration with specified voltage and current ratings.

Substiute Parts

MS 2TR

Bel Fuse Inc.In Stock: 994MS 2TR Datasheet

Current PartRFQ

0034.6807

SCHURTER Inc.In Stock: 19690034.6807 Datasheet

DirectRFQ

0473002.MRT1L

Littelfuse Inc.In Stock: 12170473002.MRT1L Datasheet

DirectRFQ

0473002.YRT1L

Littelfuse Inc.In Stock: 254850473002.YRT1L Datasheet

DirectRFQ

0471002.NRT1L

Littelfuse Inc.In Stock: 29020471002.NRT1L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MS 2TR is determined by the following critical parameters:

• Current Rating: 2 A (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Axial (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The substitute parts are grouped into two categories:

Direct Equivalents (Identical Electrical and Mechanical Specifications): Parts 0473002.MRT1L and 0473002.YRT1L from Littelfuse Inc. match all critical parameters of the MS 2TR, including current rating, voltage ratings, response time, mounting type, package configuration, and operating temperature range. These parts are manufactured to the same functional specifications and are suitable for direct replacement.

Similar Substitute (Comparable Electrical Specifications with Minor Dimensional Variation): Part 0471002.NRT1L from Littelfuse Inc. matches all electrical specifications but differs in physical diameter (0.110" vs. 0.125"), representing a similar substitute within the same product family.

Non-Equivalent Part (Different Current Rating): Part 0034.6807 from SCHURTER Inc. has a significantly different current rating (160 mA vs. 2 A) and package configuration (Radial, Can, Vertical vs. Axial), making it unsuitable as a substitute for the MS 2TR despite sharing the same voltage ratings and response time.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the MS 2TR, the following selection criteria apply:

Primary Selection: Parts 0473002.MRT1L and 0473002.YRT1L are the preferred direct equivalents. Both are manufactured by Littelfuse Inc., an active supplier, and maintain identical electrical specifications and axial package configuration. Both parts are ROHS3 compliant and carry active product status, ensuring long-term availability and supply chain stability. The 0473002.YRT1L variant has significantly higher inventory availability (25,387 pcs vs. 1,124 pcs), making it the optimal choice for high-volume procurement.

Secondary Selection: Part 0471002.NRT1L from Littelfuse Inc. is a similar substitute within the PICO® II product family. While it maintains all electrical specifications, the reduced physical diameter (0.110" vs. 0.125") may require PCB layout verification to confirm mechanical fit within existing through-hole patterns. This part is suitable only when dimensional variation is acceptable for the application.

Not Recommended: Part 0034.6807 from SCHURTER Inc. is not suitable as a substitute due to its significantly different current rating (160 mA vs. 2 A) and incompatible package configuration (Radial, Can, Vertical vs. Axial). This part addresses a different application requirement and cannot replace the MS 2TR.

Frequently Asked Questions (FAQ)

Q: Can 0473002.MRT1L and 0473002.YRT1L be used interchangeably with the MS 2TR?

A: Yes. Both parts are direct electrical and mechanical equivalents with identical current ratings (2 A), voltage ratings (125 V AC/DC), response time (Slow Blow), mounting type (Through Hole), and package configuration (Axial). The primary difference is inventory availability and REACH compliance status.

Q: What is the significance of the dimensional differences between substitute parts?

A: The MS 2TR has a diameter of 0.125", while 0473002.MRT1L and 0473002.YRT1L have 0.135" diameter, and 0471002.NRT1L has 0.110" diameter. These variations may affect fit within existing PCB through-hole patterns. Verify that the selected substitute's diameter is compatible with your board layout before implementation.

Q: Why is 0034.6807 listed as a substitute if it has a different current rating?

A: Part 0034.6807 is not a suitable substitute for the MS 2TR. It is included in this reference for completeness but has a current rating of 160 mA (vs. 2 A required) and uses a radial, can, vertical package configuration instead of axial. This part serves a different application requirement.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active substitute parts (0473002.MRT1L, 0473002.YRT1L, and 0471002.NRT1L) are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What is the difference between 0473002.MRT1L and 0473002.YRT1L?

A: Both parts are electrically and mechanically identical. The primary differences are REACH compliance status (0473002.MRT1L is REACH Unaffected; 0473002.YRT1L is REACH Affected) and inventory availability (0473002.YRT1L has significantly higher stock levels).