UMTS 5 Equivalent & Substitute Parts

Part Overview

The UMTS 5 is a 5A 250VAC board mount surface mount 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 system support and new design implementations. The UMTS 5 features a 2-SMD square end block package suitable for direct PCB mounting applications requiring 250VAC rated protection at 5 ampere current levels.

Substiute Parts

UMTS 5

Bel Fuse Inc.In Stock: 1154UMTS 5 Datasheet

Current PartRFQ

0683G5000-01

Bel Fuse Inc.In Stock: 19170683G5000-01 Datasheet

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0683G5000-11

Bel Fuse Inc.In Stock: 11100683G5000-11 Datasheet

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TR-1245UMFT5-R

Eaton - Electronics DivisionIn Stock: 3642TR-1245UMFT5-R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UMTS 5 are qualified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Current Rating: 5 A (exact match required)
• Voltage Rating - AC: 250 V minimum
• Mounting Type: Surface Mount
• Response Time: Slow Blow
• Package / Case: 2-SMD, Square End Block (physical compatibility)

Secondary Compatibility Factors:

• Operating Temperature Range: -55°C ~ 125°C or compatible overlap
• RoHS3 Compliance status
• Approval certifications (CE, cULus)

The substitute parts identified maintain the core electrical specifications (5A, 250VAC, slow blow) and physical form factor required for direct PCB replacement. Variations in voltage rating above 250VAC, breaking capacity, and melting I²t values represent acceptable parameter ranges for board mount fuse substitution.

Parameter Comparison

Engineering Selection Recommendations

Direct Surface Mount Substitutes (Recommended for PCB Replacement):

The TR-1245UMFT5-R (Eaton) and 0683G5000-01 (Bel Fuse Inc.) are qualified direct substitutes for the UMTS 5 in surface mount applications. Both parts maintain the 5A current rating, 250VAC minimum voltage rating, slow blow response, and 2-SMD square end block package geometry. The TR-1245UMFT5-R offers active product status with cURus approval and ROHS3 compliance. The 0683G5000-01 provides enhanced voltage rating (350VAC) and dual voltage capability (125VDC) with active availability and full compliance certifications.

Holder-Dependent Alternative:

The 0683G5000-11 shares electrical specifications with 0683G5000-01 but requires a separate cartridge holder for mounting. This part is not recommended for direct PCB replacement of the UMTS 5 due to mounting type incompatibility.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance and operate within the -55°C to -40°C lower temperature bound of the original specification. The TR-1245UMFT5-R operates to -40°C minimum, which is acceptable for most industrial applications. Eaton and Bel Fuse Inc. parts carry recognized approval certifications (CE, cURus) suitable for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the 0683G5000-01 directly replace the UMTS 5 on existing PCBs?

A: Yes. The 0683G5000-01 maintains identical 5A current rating, 250VAC minimum voltage rating, slow blow response, and 2-SMD square end block package dimensions. The higher voltage rating (350VAC) and DC capability (125VDC) provide enhanced performance margins without affecting AC circuit operation at 250VAC.

Q: Why is the 0683G5000-11 not recommended as a direct substitute?

A: The 0683G5000-11 requires a separate cartridge holder for installation, whereas the UMTS 5 is a direct surface mount component. This mounting type difference prevents direct PCB replacement without circuit board redesign.

Q: What is the difference between the TR-1245UMFT5-R and the Bel Fuse alternatives?

A: The TR-1245UMFT5-R is manufactured by Eaton and provides equivalent 5A, 250VAC, slow blow performance in the same 2-SMD package. It operates to -40°C minimum (versus -55°C for the UMTS 5) and carries cURus approval. The Bel Fuse alternatives offer the same manufacturer continuity as the original part with active product status.

Q: Are there voltage rating differences that affect substitution?

A: The UMTS 5 is rated 250VAC. The 0683G5000-01 and 0683G5000-11 are rated 350VAC AC with 125VDC capability. Higher voltage ratings are acceptable substitutes for lower voltage applications. The TR-1245UMFT5-R matches the 250VAC rating exactly.

Q: What compliance certifications should I verify for my application?

A: The UMTS 5 carries CE, cULus, and UMF approvals. The TR-1245UMFT5-R carries cURus approval. The 0683G5000-01 carries CE and cURus approvals. Verify that substitute part certifications align with your specific regulatory requirements before implementation.

Q: How do melting I²t values affect substitution suitability?

A: The UMTS 5 has a melting I²t of 69. The 0683G5000-01 and 0683G5000-11 have 47, while the TR-1245UMFT5-R has 105. These variations reflect different thermal response characteristics within the slow blow fuse category. Selection should be based on circuit protection requirements and thermal coordination with upstream protective devices.