Bel Fuse Inc. 5TT160 Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Bel Fuse Inc. 5TT160 is a 160 mA, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm form factor, designed for circuit protection in applications requiring holder-based mounting. This part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

5TT160

Bel Fuse Inc.In Stock: 9765TT160 Datasheet

Current PartRFQ

5ST 160-R

Bel Fuse Inc.In Stock: 38575ST 160-R Datasheet

Parametric EquivalentRFQ

0218.160HXP

Littelfuse Inc.In Stock: 12220218.160HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5TT160 is determined by strict equivalence across the following parameters:

• Current Rating: 160 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

Both identified substitute parts meet all mandatory equivalence criteria. Differences in breaking capacity, melting I²t, DC cold resistance, and approval agency certifications are secondary parameters that do not affect functional substitutability within the specified electrical and mechanical constraints.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts satisfy the core electrical and mechanical requirements for direct replacement of the 5TT160. Selection between alternatives should be based on the following factors:

5ST 160-R (Bel Fuse Inc.): Maintains manufacturer continuity with the original part. Achieves ROHS3 compliance and supports extended approval certifications (CCC, CE, CSA, cURus, IMQ, SEMKO, VDE). Inventory availability is substantial at 3803 units.

0218.160HXP (Littelfuse Inc.): Provides cross-manufacturer substitution with ROHS3 compliance and comprehensive approval coverage (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE). Physical dimensions show minor tolerance variation (0.205" diameter vs. 0.201"), which remains within standard holder compatibility ranges. Inventory availability is 1192 units.

Both parts are active products suitable for new designs and legacy system support. The 5TT160 obsolete status necessitates transition to either substitute for continued procurement.

Frequently Asked Questions (FAQ)

Q: Can the 5ST 160-R or 0218.160HXP be used as direct replacements for the 5TT160?

A: Yes. Both substitute parts match the mandatory electrical parameters (160 mA, 250 V AC, slow-blow response) and mechanical specifications (5mm x 20mm cartridge, holder-based mounting). Physical and electrical compatibility is confirmed.

Q: What is the significance of the different breaking capacity values?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt. The 5TT160 specifies 100A, while both substitutes specify 35A. This difference does not affect substitutability in applications where the circuit's maximum fault current does not exceed the substitute's breaking capacity. System-level fault analysis is required to confirm adequacy.

Q: Are there RoHS compliance implications when switching from the 5TT160?

A: The 5TT160 is RoHS non-compliant. Both substitute parts achieve ROHS3 compliance, which may be required for new designs or regulatory compliance in target markets. Existing systems using the obsolete part may continue operation without modification.

Q: Do the dimensional tolerances of the 0218.160HXP affect holder compatibility?

A: The 0218.160HXP diameter is specified as 0.205" (5.20mm) compared to the 5TT160 at 0.201" (5.10mm). This 0.10mm difference falls within standard mechanical tolerances for 5mm x 20mm cartridge fuse holders and does not compromise functional fit or electrical contact.

Q: Which substitute part should be selected for new designs?

A: Both parts are suitable for new designs. Selection depends on supply chain preference, approval certifications required by the application, and inventory availability. The 5ST 160-R maintains Bel Fuse manufacturer continuity, while the 0218.160HXP provides cross-manufacturer sourcing flexibility.