5ETP 1-R Equivalent & Substitute Parts

Part Overview

The 5ETP 1-R is a 1 A, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm (axial) through-hole package manufactured by Bel Fuse Inc. This component is active in production and widely used in electronic circuit protection applications. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification, enabling direct replacement in circuit designs without modification to fuse holders or mounting structures.

Substiute Parts

5ETP 1-R

Bel Fuse Inc.In Stock: 18935ETP 1-R Datasheet

Current PartRFQ

5STP 1-R

Bel Fuse Inc.In Stock: 18065STP 1-R Datasheet

Parametric EquivalentRFQ

5TTP 1-R

Bel Fuse Inc.In Stock: 18735TTP 1-R Datasheet

Parametric EquivalentRFQ

TSC-P-1A

OptiFuseIn Stock: 2688TSC-P-1A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5ETP 1-R are qualified based on the following criteria:

• Current Rating: 1 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)

All substitute parts listed below meet these core electrical and mechanical parameters, ensuring functional equivalence and direct interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain the core electrical and mechanical specifications required for direct replacement in the 5ETP 1-R application. Selection among these equivalents should be based on:

• Approval Agency Requirements: The 5ETP 1-R carries certifications from CCC, CE, CSA, cULus, SEMKO, and VDE. The 5STP 1-R includes all these certifications plus IMQ. The 5TTP 1-R carries CE, CSA, cULus, and PSE certifications. The TSC-P-1A carries cULus and UL 248 certifications. Verify that the selected substitute meets the regulatory requirements of the target application.

• Breaking Capacity Variation: Breaking capacity ranges from 35 A (5STP 1-R) to 150 A (5ETP 1-R). This parameter does not affect interchangeability for standard circuit protection but may influence performance in high-fault-current environments.

• Melting I²t Variation: Melting I²t values range from 2.242 to 28. This thermal characteristic affects response behavior under transient conditions. Parts with lower I²t values respond faster to thermal stress.

• DC Cold Resistance: Resistance values range from 0.095 Ohms to 0.27 Ohms. This parameter influences voltage drop across the fuse during normal operation.

• Inventory Availability: All parts are in stock. TSC-P-1A has the highest inventory level at 2643 pieces.

Frequently Asked Questions (FAQ)

Q: Can the 5STP 1-R replace the 5ETP 1-R in all applications?

A: The 5STP 1-R meets all core electrical and mechanical parameters (1 A, 250 V AC, slow-blow, 5mm x 20mm package). However, it has a lower breaking capacity (35 A versus 150 A) and different melting I²t (2.4 versus 28). Verify that the target application does not require the higher breaking capacity or thermal characteristics of the 5ETP 1-R.

Q: What is the difference between the 5ETP 1-R and 5TTP 1-R?

A: Both parts share identical electrical ratings (1 A, 250 V AC, slow-blow) and package dimensions (5mm x 20mm). The 5ETP 1-R has a breaking capacity of 150 A and melting I²t of 28, while the 5TTP 1-R has a breaking capacity of 100 A and melting I²t of 8.63. The 5ETP 1-R carries more approval certifications (CCC, CE, CSA, cULus, SEMKO, VDE) compared to the 5TTP 1-R (CE, CSA, cULus, PSE).

Q: Is the TSC-P-1A from OptiFuse a direct substitute?

A: The TSC-P-1A meets all core electrical and mechanical specifications (1 A, 250 V AC, slow-blow, 5mm x 20mm package). It carries cULus and UL 248 certifications. Confirm that these certifications satisfy the regulatory requirements of your application before substitution.

Q: How do I select between these substitute parts?

A: Selection depends on three factors: (1) regulatory certification requirements for your application, (2) breaking capacity and melting I²t requirements for your circuit, and (3) inventory availability. All parts are mechanically and electrically interchangeable at the core specification level.

Q: Can I use the 5STP 1-R if my circuit requires high breaking capacity?

A: The 5STP 1-R has a breaking capacity of 35 A, which is lower than the 5ETP 1-R (150 A) and 5TTP 1-R (100 A). If your circuit design specifies a minimum breaking capacity above 35 A, the 5STP 1-R is not suitable.