UMTS 4 Equivalent & Substitute Parts

Part Overview

The UMTS 4 is a 4A 250VAC board mount surface mount fuse manufactured by Bel Fuse Inc. with slow blow response characteristics. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The UMTS 4 operates across a temperature range of -55°C to 125°C and meets CE, cULus, and UMF approval standards.

Substiute Parts

UMTS 4

Bel Fuse Inc.In Stock: 910UMTS 4 Datasheet

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0683G4000-01

Bel Fuse Inc.In Stock: 22320683G4000-01 Datasheet

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0683G4000-11

Bel Fuse Inc.In Stock: 9370683G4000-11 Datasheet

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TR-1245UMFT4-R

Eaton - Electronics DivisionIn Stock: 4191TR-1245UMFT4-R Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UMTS 4 are identified based on the following critical parameters: current rating (4A), voltage rating (250VAC minimum), surface mount packaging (2-SMD, Square End Block), slow blow response time, and RoHS3 compliance. The substitute parts are grouped into two categories:

Category 1: Direct Surface Mount Substitutes Parts maintaining identical mounting type, package configuration, and voltage specifications. These parts preserve PCB layout compatibility and assembly process requirements.

Category 2: Functional Equivalents with Modified Mounting Parts meeting electrical specifications but requiring holder cartridge mounting, suitable for applications where mounting flexibility exists.

Parameter Comparison

Engineering Selection Recommendations

TR-1245UMFT4-R (Eaton - Electronics Division) is the primary substitute for direct replacement applications. This part maintains identical surface mount packaging (2-SMD, Square End Block), 250VAC voltage rating, 4A current rating, and slow blow response time. The TR-1245UMFT4-R is active in production status with cURus approval and ROHS3 compliance. Operating temperature range extends to -40°C minimum, which covers most industrial applications within the UMTS 4 specification window.

0683G4000-01 (Bel Fuse Inc.) serves as an alternative surface mount substitute with enhanced voltage rating (350VAC/125VDC). This part maintains identical package configuration and mounting type, with active product status and CE/cURus approvals. The higher voltage rating provides design margin for applications with voltage transients or future specification changes.

0683G4000-11 (Bel Fuse Inc.) is suitable only for applications where cartridge-style mounting with holder is acceptable. This part requires design modification to accommodate holder cartridge mounting and is not recommended for direct PCB-level substitution of the UMTS 4.

Frequently Asked Questions (FAQ)

Q: Can TR-1245UMFT4-R replace UMTS 4 in existing designs without PCB modification? A: Yes. TR-1245UMFT4-R maintains identical surface mount package configuration (2-SMD, Square End Block) and footprint compatibility with UMTS 4. No PCB layout changes are required.

Q: What is the difference between 0683G4000-01 and 0683G4000-11? A: 0683G4000-01 is a surface mount component with 2-SMD, Square End Block packaging identical to UMTS 4. 0683G4000-11 requires a separate holder cartridge and is not surface mount compatible. Selection depends on mounting requirements.

Q: Does the higher voltage rating of 0683G4000-01 (350VAC vs. 250VAC) affect circuit performance? A: No. Higher voltage rating indicates greater electrical stress capability. The fuse will operate identically at 250VAC. The 4A current rating and slow blow response time remain the primary functional parameters.

Q: Are all substitute parts RoHS3 compliant? A: Yes. UMTS 4, 0683G4000-01, 0683G4000-11, and TR-1245UMFT4-R are all ROHS3 compliant.

Q: What is the minimum operating temperature difference between UMTS 4 and TR-1245UMFT4-R? A: UMTS 4 operates from -55°C minimum; TR-1245UMFT4-R operates from -40°C minimum. For applications requiring -55°C operation, 0683G4000-01 is the appropriate substitute, as it maintains the -55°C lower temperature limit.

Q: Can I use 0683G4000-01 or 0683G4000-11 in applications rated for 250VAC only? A: Yes. Both parts are rated for 350VAC, which exceeds 250VAC requirements. They are electrically compatible with 250VAC circuits and provide additional voltage margin.