Equivalent & Substitute Parts: TR/PCB-1/2

Part Overview

The TR/PCB-1/2 is a 500 mA board mount fuse rated for 250 V AC and 450 V DC operation. This component is manufactured by Eaton - Electronics Division under the PC-Tron® series and features a through-hole radial configuration with fast-blow response characteristics. The part is classified as obsolete, which necessitates identification of active equivalent alternatives to maintain design continuity and ensure ongoing component availability for production and field service applications.

Substiute Parts

TR/PCB-1/2

Eaton - Electronics DivisionIn Stock: 733TR/PCB-1/2 Datasheet

Current PartRFQ

TR/PCB-1/2-R

Eaton - Electronics DivisionIn Stock: 773TR/PCB-1/2-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TR/PCB-1/2 is determined by electrical and mechanical parameter equivalence. The substitute part must satisfy all of the following criteria:

• Current Rating: 500 mA (exact match)
• Voltage Rating - AC: 250 V (exact match)
• Voltage Rating - DC: 450 V (exact match)
• Response Time: Fast Blow (exact match)
• Mounting Type: Through Hole (exact match)
• Fuse Type: Board Mount (Cartridge Style Excluded) (exact match)
• Package / Case: Radial, Box (exact match)
• Breaking Capacity @ Rated Voltage: 50A AC, 5.9kA DC (exact match)
• Melting I²t: 0.006 (exact match)
• Physical Dimensions: 0.350" L x 0.184" W x 0.345" H (exact match)
• Approval Agency: CSA, UL (exact match)
• Series: PC-Tron® (exact match)

The primary distinction between the main part and its substitute relates to product status and packaging configuration, not electrical or mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

The TR/PCB-1/2-R serves as the direct active equivalent to the obsolete TR/PCB-1/2. Both parts are manufactured by Eaton - Electronics Division and maintain identical electrical and mechanical specifications across all critical parameters: 500 mA current rating, 250 V AC / 450 V DC voltage ratings, fast-blow response, through-hole mounting, and physical dimensions.

The TR/PCB-1/2-R is classified as an active product with current manufacturing support, whereas the TR/PCB-1/2 is obsolete. The TR/PCB-1/2-R additionally achieves ROHS3 compliance, meeting modern regulatory requirements for new designs and production runs.

The packaging difference between the two parts—box packaging for the main part versus tape and reel packaging for the substitute—reflects standard industry practice for active components. Tape and reel packaging is the current standard for high-volume manufacturing and automated assembly processes.

For applications requiring the TR/PCB-1/2, the TR/PCB-1/2-R provides full functional and mechanical compatibility with the added benefit of active product status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Are the TR/PCB-1/2 and TR/PCB-1/2-R electrically identical?

A: Yes. Both parts share identical electrical specifications: 500 mA current rating, 250 V AC and 450 V DC voltage ratings, fast-blow response time, 50A AC and 5.9kA DC breaking capacity, and 0.006 melting I²t value.

Q: Are the physical dimensions the same?

A: Yes. Both parts measure 0.350" L x 0.184" W x 0.345" H (8.89mm x 4.67mm x 8.76mm) and use identical radial, box package configurations.

Q: What is the difference between the two parts?

A: The primary differences are product status and packaging format. The TR/PCB-1/2 is obsolete with box packaging, while the TR/PCB-1/2-R is an active product supplied in tape and reel format. The TR/PCB-1/2-R also achieves ROHS3 compliance.

Q: Can the TR/PCB-1/2-R be used as a direct replacement in existing designs?

A: Yes. The TR/PCB-1/2-R is mechanically and electrically compatible with the TR/PCB-1/2. Both parts mount identically through the same through-hole configuration and deliver equivalent performance in circuit applications.

Q: Why is the substitute part supplied in tape and reel packaging?

A: Tape and reel packaging is the current manufacturing standard for active electronic components. This format supports automated assembly processes and high-volume production requirements.

Q: Does the ROHS3 compliance of the TR/PCB-1/2-R affect compatibility?

A: No. ROHS3 compliance indicates adherence to environmental and material restrictions but does not alter electrical or mechanical performance. The TR/PCB-1/2-R is fully compatible with applications designed for the TR/PCB-1/2.

Q: Are both parts approved by the same certification agencies?

A: Yes. Both the TR/PCB-1/2 and TR/PCB-1/2-R carry CSA and UL approvals.