TR3/S505SC-2.5-R Equivalent & Substitute Parts

Part Overview

The TR3/S505SC-2.5-R is a 2.5 A, 250 V AC/DC ceramic cartridge fuse manufactured by Eaton - Electronics Division. This through-hole component features a 5mm x 20mm (axial) form factor with slow-blow response characteristics and a breaking capacity of 1.5 kA at rated voltage. The part is actively produced and stocked with 885 pieces available in tape and reel packaging. Identifying equivalent substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and maintain component availability across manufacturing cycles.

Substiute Parts

TR3/S505SC-2.5-R

Eaton - Electronics DivisionIn Stock: 940TR3/S505SC-2.5-R Datasheet

Current PartRFQ

TUC UDA-P 2.5A 250V (PF)

ConquerIn Stock: 2075TUC UDA-P 2.5A 250V (PF) Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TR3/S505SC-2.5-R is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 2.5 A
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Ceramic
• Package / Case: 5mm x 20mm (Axial)
• Mounting Type: Through Hole
• Response Time: Slow Blow
• Breaking Capacity @ Rated Voltage: 1.5 kA

The substitute part TUC UDA-P 2.5A 250V (PF) manufactured by Conquer meets all mandatory matching parameters. Both parts are actively produced, share identical electrical ratings, mechanical dimensions, and functional characteristics. The substitute is available in bulk packaging with higher inventory levels (1967 pieces).

Parameter Comparison

Engineering Selection Recommendations

Both the TR3/S505SC-2.5-R and TUC UDA-P 2.5A 250V (PF) are active production components with full electrical and mechanical equivalence. Selection between these parts is based on the following factors:

Eaton TR3/S505SC-2.5-R:

• Tape and reel packaging suitable for automated assembly processes
• Broader approval agency coverage including BSI, VDE, SEMKO, and IMQ
• Lower melting I²t value (19.9) provides faster thermal response
• Lower DC cold resistance (40 mOhms)

Conquer TUC UDA-P 2.5A 250V (PF):

• Bulk packaging configuration
• Higher inventory availability (1967 pieces vs. 885 pieces)
• RoHS3 compliance and REACH unaffected status explicitly documented
• Operating temperature range specified (-55°C ~ 125°C)
• Higher melting I²t value (24.75) provides extended thermal margin

Both parts carry international safety certifications including cURus and KC approval. The choice between these substitutes depends on packaging requirements, assembly methodology, and specific compliance documentation needs for the end application.

Frequently Asked Questions (FAQ)

Q: Can the TUC UDA-P 2.5A 250V (PF) be used as a direct replacement for the TR3/S505SC-2.5-R in existing designs?

A: Yes. Both parts share identical electrical ratings (2.5 A, 250 V AC/DC), fuse type (ceramic cartridge), mechanical dimensions (5mm x 20mm axial), mounting method (through hole), and response characteristics (slow blow). The breaking capacity and functional performance are equivalent at 1.5 kA.

Q: What is the primary difference between these two parts?

A: The main differences are packaging format (tape and reel versus bulk), melting I²t characteristics (19.9 versus 24.75), and approval agency certifications. The Eaton part offers broader international certification coverage, while the Conquer part provides explicit operating temperature range documentation and RoHS3 compliance status.

Q: Are there packaging considerations when switching between these parts?

A: Yes. The TR3/S505SC-2.5-R is supplied in tape and reel format, optimized for automated pick-and-place assembly. The TUC UDA-P 2.5A 250V (PF) is supplied in bulk packaging, requiring manual handling or alternative feeding systems. Assembly process compatibility must be evaluated based on production equipment capabilities.

Q: Do both parts meet the same safety standards?

A: Both parts carry multiple international safety certifications. Common approvals include cURus and KC. The Eaton part includes additional certifications from BSI, VDE, SEMKO, and IMQ. The Conquer part includes TUV certification. Application-specific compliance requirements should be verified against the target market and end-use standards.

Q: What is the significance of the different melting I²t values?

A: The melting I²t value (19.9 for Eaton versus 24.75 for Conquer) indicates the thermal energy required to melt the fuse element. The Eaton part responds faster to thermal stress, while the Conquer part provides a wider thermal margin before activation. Both are rated as slow-blow fuses and operate within the same current and voltage specifications.