TR2/TCP2-R Equivalent & Substitute Parts

Part Overview

The TR2/TCP2-R is a 2A 250VAC board mount surface mount fuse manufactured by Eaton - Electronics Division. This component is classified as Active product status and is designed for telecom applications requiring overcurrent protection in compact surface mount configurations. The TCP series fuse operates at 250VAC with a breaking capacity of 50A at rated voltage and is RoHS compliant with CSA and UR approvals.

Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support applications where alternative voltage ratings or performance characteristics align with system requirements.

Substiute Parts

TR2/TCP2-R

Eaton - Electronics DivisionIn Stock: 846TR2/TCP2-R Datasheet

Current PartRFQ

0461002.ER

Littelfuse Inc.In Stock: 201820461002.ER Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0461002.ER is identified as a substitute for the TR2/TCP2-R based on the following matching parameters:

Matching Criteria:

• Current Rating: 2A (identical)
• Mounting Type: Surface Mount (identical)
• Fuse Type: Board Mount (identical)
• Package / Case: 2-SMD, Square End Block (identical)
• Approval Agency: CSA, UR (identical)
• RoHS Compliance: Both compliant (TR2/TCP2-R is RoHS Compliant; 0461002.ER is ROHS3 Compliant)
• Applications: Telecom (identical)
• Moisture Sensitivity Level: 1 - Unlimited (identical)

Differing Parameters: The 0461002.ER operates at higher voltage ratings (600VAC / 80VDC) compared to the TR2/TCP2-R (250VAC), provides higher breaking capacity (60A AC, 100A DC versus 50A), includes operating temperature specification (-55°C ~ 125°C), and exhibits different electrical characteristics (Melting I²t of 17.5 versus 30, DC Cold Resistance of 0.05 Ohms versus 0.075 Ohms). The 0461002.ER is classified as Slow Blow response time.

Parameter Comparison

Engineering Selection Recommendations

Both the TR2/TCP2-R and 0461002.ER are Active product status components with identical CSA and UR approvals, confirming regulatory compliance for telecom applications. Both components are RoHS compliant and feature MSL 1 (Unlimited) moisture sensitivity ratings, indicating suitability for standard manufacturing and storage conditions.

The TR2/TCP2-R is the primary specification for applications requiring 250VAC operation. The 0461002.ER serves as a substitute in applications where higher voltage ratings (600VAC / 80VDC) are acceptable or required, or where the Slow Blow response characteristic and enhanced breaking capacity (60A AC, 100A DC) provide system advantages. The 0461002.ER exhibits lower DC cold resistance (0.05 Ohms versus 0.075 Ohms) and lower melting I²t (17.5 versus 30), which may influence thermal performance and response characteristics in specific circuit designs.

Physical dimensions differ slightly between the two parts. The TR2/TCP2-R measures 10.29mm x 2.77mm x 2.77mm, while the 0461002.ER measures 10.10mm x 3.12mm x 3.12mm. PCB layout and thermal management considerations should account for these dimensional variations.

Frequently Asked Questions (FAQ)

Q: Can the 0461002.ER be used as a direct replacement for the TR2/TCP2-R in all applications?

A: The 0461002.ER shares identical current rating (2A), mounting type (Surface Mount), fuse type (Board Mount), package configuration (2-SMD, Square End Block), and regulatory approvals (CSA, UR). However, the 0461002.ER operates at higher voltage ratings (600VAC / 80VDC versus 250VAC). Substitution is valid only when the application circuit voltage does not exceed 250VAC, or when higher voltage ratings are acceptable for the system design.

Q: What are the key electrical differences between these two fuses?

A: The TR2/TCP2-R has a melting I²t of 30 and DC cold resistance of 0.075 Ohms. The 0461002.ER has a melting I²t of 17.5 and DC cold resistance of 0.05 Ohms. The 0461002.ER is specified as Slow Blow response time, while the TR2/TCP2-R response time is not specified. These differences affect thermal response and overcurrent protection characteristics.

Q: Are there physical compatibility concerns when substituting these parts?

A: Both components use identical 2-SMD, Square End Block packaging. However, physical dimensions differ slightly: TR2/TCP2-R is 10.29mm x 2.77mm x 2.77mm, while 0461002.ER is 10.10mm x 3.12mm x 3.12mm. PCB footprints and thermal clearances should be verified for the specific application.

Q: Do both parts meet the same regulatory requirements?

A: Both the TR2/TCP2-R and 0461002.ER carry CSA and UR approvals and are RoHS compliant. The 0461002.ER is specified as ROHS3 compliant, representing a more recent RoHS standard iteration. Both components are suitable for telecom applications from a regulatory compliance perspective.

Q: What is the significance of the Slow Blow response time on the 0461002.ER?

A: Slow Blow response time indicates the fuse is designed to tolerate temporary inrush currents without nuisance operation while still providing overcurrent protection. This characteristic may be advantageous in applications with transient current spikes, but circuit design must be evaluated to ensure this response time aligns with system protection requirements.