Bel Fuse Inc. 5ET 1.6 Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Bel Fuse Inc. 5ET 1.6 is a 1.6 A, 250 V AC/DC slow-blow glass cartridge fuse in a 5mm x 20mm form factor, designed for use with a fuse holder. This part is classified as obsolete, making identification of equivalent and substitute components essential for system maintenance, repair, and redesign applications. Active equivalent models from Bel Fuse Inc. and cross-manufacturer alternatives are available with identical or comparable electrical and mechanical specifications.

Substiute Parts

5ET 1.6

Bel Fuse Inc.In Stock: 7205ET 1.6 Datasheet

Current PartRFQ

5ET 1.6-R

Bel Fuse Inc.In Stock: 8025ET 1.6-R Datasheet

DirectRFQ

5ST 1.6-R

Bel Fuse Inc.In Stock: 87855ST 1.6-R Datasheet

Parametric EquivalentRFQ

5TT 1.6-R

Bel Fuse Inc.In Stock: 17155TT 1.6-R Datasheet

Parametric EquivalentRFQ

0034.3119.G

SCHURTER Inc.In Stock: 34620034.3119.G Datasheet

SimilarRFQ

021801.6MXBP

Littelfuse Inc.In Stock: 963021801.6MXBP Datasheet

SimilarRFQ

021801.6MXP

Littelfuse Inc.In Stock: 2675021801.6MXP Datasheet

SimilarRFQ

021901.6MXAP

Littelfuse Inc.In Stock: 2229021901.6MXAP Datasheet

SimilarRFQ

BK1/GMC-1.6-R

Eaton - Electronics DivisionIn Stock: 9107BK1/GMC-1.6-R Datasheet

SimilarRFQ

GDC-1.6A

Eaton - Electronics DivisionIn Stock: 980GDC-1.6A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5ET 1.6 is determined by strict equivalence in the following parameters:

• Current Rating: 1.6 A (mandatory)
• Voltage Rating (AC): 250 V (mandatory)
• Package / Case: 5mm x 20mm (mandatory)
• Fuse Type: Cartridge, Glass (mandatory)
• Mounting Type: Requires Holder (mandatory)

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalent (Bel Fuse Inc. 5ET 1.6-R): Identical electrical and mechanical specifications with active product status and improved RoHS3 compliance.

Parametric Equivalents (Bel Fuse Inc. 5ST 1.6-R, 5TT 1.6-R): Meet all mandatory parameters with variations in breaking capacity and melting I²t values. These represent different response characteristics within the same form factor and current rating.

Cross-Manufacturer Alternatives (Littelfuse Inc., Eaton - Electronics Division, SCHURTER Inc.): Meet all mandatory parameters with comparable electrical performance and certifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: Bel Fuse Inc. 5ET 1.6-R

The 5ET 1.6-R is the direct active equivalent of the obsolete 5ET 1.6. It maintains identical electrical specifications (1.6 A, 250 V, 150 A breaking capacity, 62 melting I²t) and mechanical form factor. The 5ET 1.6-R carries ROHS3 compliance and active product status, making it the preferred choice for direct replacement in existing designs.

Secondary Recommendations: Bel Fuse Inc. 5ST 1.6-R and 5TT 1.6-R

These parametric equivalents meet all mandatory substitution criteria but differ in breaking capacity and melting I²t characteristics. Selection depends on circuit protection requirements:

• 5ST 1.6-R: 35 A breaking capacity, 6.9 melting I²t (lowest thermal energy)
• 5TT 1.6-R: 100 A breaking capacity, 19.7 melting I²t (intermediate thermal energy)

Cross-Manufacturer Alternatives

Littelfuse Inc. 021801.6MXBP, 021801.6MXP, and 021901.6MXAP meet all mandatory parameters with active status and ROHS3 compliance. Littelfuse parts carry broader certification coverage (CCC, CE, CSA, K-MARK, PSE, SEMKO, UL, VDE). Selection among these alternatives is based on breaking capacity and melting I²t requirements.

Eaton - Electronics Division GDC-1.6A provides an alternative with 35 A breaking capacity and slow-blow response. BK1/GMC-1.6-R offers medium-blow response with 100 A breaking capacity, suitable for applications requiring faster response than slow-blow characteristics.

All recommended substitutes are available in active product status with current inventory levels and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the 5ET 1.6 be directly replaced with the 5ET 1.6-R?

A: Yes. The 5ET 1.6-R is the direct active equivalent with identical electrical and mechanical specifications. It is the recommended replacement for the obsolete 5ET 1.6.

Q: What is the difference between the 5ET 1.6-R, 5ST 1.6-R, and 5TT 1.6-R?

A: All three maintain the same current rating (1.6 A), voltage (250 V), and form factor (5x20mm). They differ in breaking capacity and melting I²t: 5ET 1.6-R (150 A, 62), 5ST 1.6-R (35 A, 6.9), and 5TT 1.6-R (100 A, 19.7). Selection depends on circuit protection requirements.

Q: Are cross-manufacturer alternatives compatible with the original 5ET 1.6 holder?

A: Yes. All substitute parts listed maintain the 5mm x 20mm form factor and require a fuse holder. They are mechanically compatible with standard 5x20mm fuse holders.

Q: What certifications should I verify when selecting a substitute?

A: The original 5ET 1.6 carries CCC, CE, CSA, cULus, SEMKO, and VDE certifications. Verify that the selected substitute meets the certifications required by your application and regional standards.

Q: Does the response time difference between slow-blow and medium-blow affect compatibility?

A: Response time affects circuit protection behavior. The original 5ET 1.6 is slow-blow. Most substitutes maintain slow-blow response. The Eaton BK1/GMC-1.6-R is medium-blow and should only be selected if the application specifically requires faster response characteristics.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance. The original 5ET 1.6 is RoHS non-compliant due to its obsolete status.

Q: What is the significance of melting I²t values in fuse selection?

A: Melting I²t indicates the thermal energy required to melt the fuse element. Lower values result in faster response to overcurrent. Selection should match the original specification or be verified against circuit protection requirements.