TR3/S505SC-2-R Equivalent & Substitute Parts

Part Overview

The TR3/S505SC-2-R is a 2 A, 250 V AC/DC ceramic cartridge fuse with slow-blow response characteristics, designed for through-hole mounting in 5mm x 20mm (axial) form factor. This component is classified as Active product status and is manufactured by Eaton - Electronics Division as part of the S505 series. The fuse provides circuit protection with a breaking capacity of 1.5 kA at rated voltage and is supplied in Tape & Reel packaging. Equivalent substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when alternative packaging configurations are required.

Substiute Parts

TR3/S505SC-2-R

Eaton - Electronics DivisionIn Stock: 1052TR3/S505SC-2-R Datasheet

Current PartRFQ

TR2/S505SC-2-R

Eaton - Electronics DivisionIn Stock: 741TR2/S505SC-2-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TR3/S505SC-2-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 2 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 1.5 kA (exact match required)
• Melting I²t: 9.83 (exact match required)
• DC Cold Resistance: 0.055 Ohms (exact match required)
• Series: S505 (exact match required)

The substitute part TR2/S505SC-2-R meets all critical electrical and mechanical parameters. The primary distinction between the main part and substitute is the packaging configuration: TR3 denotes Tape & Reel packaging with a 3-inch reel, while TR2 denotes Tape & Reel packaging with a 2-inch reel. Both parts are manufactured by Eaton - Electronics Division and belong to the S505 series.

Parameter Comparison

Engineering Selection Recommendations

Both the TR3/S505SC-2-R and TR2/S505SC-2-R are Active product status components manufactured by Eaton - Electronics Division. Both parts carry identical regulatory approvals from BSI, CCC/CQC, CSA, cURus, IMQ, KC, PSE/JET, SEMKO, and VDE, confirming compliance with international safety and performance standards.

The TR2/S505SC-2-R substitute part is RoHS3 compliant, providing additional environmental compliance documentation. Selection between the main part and substitute should be based on packaging reel size requirements: the TR3 configuration uses a 3-inch reel, while the TR2 configuration uses a 2-inch reel. Both configurations are suitable for automated assembly processes and manual component placement.

All electrical characteristics, mechanical dimensions, and performance specifications are identical between the two part numbers, ensuring direct functional equivalence in circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can TR2/S505SC-2-R be used as a direct replacement for TR3/S505SC-2-R?

A: Yes. The TR2/S505SC-2-R is a parametric equivalent with identical electrical ratings (2 A, 250 V AC/DC), fuse type (ceramic cartridge), response time (slow blow), mechanical dimensions (5mm x 20mm), breaking capacity (1.5 kA), and DC cold resistance (0.055 Ohms). The only difference is the Tape & Reel packaging configuration: TR2 uses a 2-inch reel while TR3 uses a 3-inch reel.

Q: What is the difference between TR2 and TR3 packaging designations?

A: TR2 and TR3 refer to Tape & Reel packaging with different reel diameters. TR2 indicates a 2-inch reel configuration, while TR3 indicates a 3-inch reel configuration. Both are standard automated assembly packaging formats. The component itself remains identical.

Q: Are both parts suitable for the same circuit protection applications?

A: Yes. Both TR3/S505SC-2-R and TR2/S505SC-2-R provide identical circuit protection performance with 2 A current rating, 250 V voltage rating, 1.5 kA breaking capacity, and slow-blow response characteristics. They are functionally interchangeable in all circuit applications.

Q: Do both parts carry the same regulatory certifications?

A: Yes. Both parts are approved by BSI, CCC/CQC, CSA, cURus, IMQ, KC, PSE/JET, SEMKO, and VDE. The TR2/S505SC-2-R additionally carries RoHS3 compliance documentation.

Q: What is the melting I²t value and why is it important?

A: The melting I²t value for both parts is 9.83. This parameter defines the thermal energy required to melt the fuse element and is critical for ensuring the fuse operates within specified time-current characteristics. Identical I²t values confirm equivalent protection performance.

Q: Can these fuses be used in both AC and DC circuits?

A: Yes. Both TR3/S505SC-2-R and TR2/S505SC-2-R are rated for 250 V AC/DC operation, making them suitable for both alternating and direct current applications within the specified voltage and current limits.

Q: What is the DC cold resistance specification?

A: The DC cold resistance for both parts is 0.055 Ohms. This specification defines the electrical resistance of the fuse element when no current is flowing and is used in circuit calculations and thermal analysis.