Equivalent & Substitute Parts for TR/PCB-3-SD Board Mount Fuse

Part Overview

The TR/PCB-3-SD is a 3 A, 250 V AC / 450 V DC board mount fuse manufactured by Eaton - Electronics Division, part of the PC-Tron® series. This through-hole radial fuse features fast-blow response characteristics and is designed for applications requiring reliable overcurrent protection in industrial and commercial electronics.

The TR/PCB-3-SD carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and field service requirements for legacy systems utilizing this component.

Substiute Parts

TR/PCB-3-SD

Eaton - Electronics DivisionIn Stock: 861TR/PCB-3-SD Datasheet

Current PartRFQ

TR/PCB-3-R

Eaton - Electronics DivisionIn Stock: 1357TR/PCB-3-R Datasheet

DirectRFQ

80813000000

Littelfuse Inc.In Stock: 90780813000000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TR/PCB-3-SD are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Electrical Parameters (Critical):

• Current Rating: 3 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Voltage Rating - DC: 450 V or higher (equal or greater acceptable)
• Response Time: Fast Blow (exact match required)
• Fuse Type: Board Mount, Cartridge Style Excluded (exact match required)

Mechanical Parameters (Critical):

• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Box (exact match required)
• Physical Dimensions: Compatible with 0.350" L x 0.184" W x 0.345" H footprint

Compliance Parameters:

• Approval Agency: CSA, UL certification or equivalent recognized standards

Substitute parts are grouped into two categories: Direct Manufacturer Equivalents (same manufacturer, identical electrical specifications) and Similar Manufacturer Alternatives (different manufacturer, compatible electrical specifications with noted parameter variations).

Parameter Comparison

Engineering Selection Recommendations

TR/PCB-3-R (Direct Equivalent - Recommended Primary Substitute)

The TR/PCB-3-R is the direct equivalent substitute for the obsolete TR/PCB-3-SD. Both parts are manufactured by Eaton - Electronics Division and share identical electrical specifications: 3 A current rating, 250 V AC / 450 V DC voltage ratings, fast-blow response, and 0.75 melting I²t. Physical dimensions and breaking capacity are identical. The TR/PCB-3-R carries active product status and is ROHS3 compliant, providing superior supply chain availability and regulatory compliance for new designs and production continuity. Current inventory: 1,346 pieces.

80813000000 (Similar Alternative - Secondary Substitute)

The Littelfuse 80813000000 (Series 808) is a compatible alternative when TR/PCB-3-R availability is constrained. This part maintains identical current rating (3 A), AC voltage rating (250 V), response time (fast-blow), mounting type (through-hole), and package configuration (radial, box). Physical dimensions are within acceptable tolerance (0.350" L x 0.183" W x 0.350" H).

Critical parameter variance: The 80813000000 has a DC voltage rating of 350 V, which is 100 V lower than the TR/PCB-3-SD specification of 450 V. This part is suitable only for applications where the maximum DC voltage does not exceed 350 V. The 80813000000 offers superior breaking capacity (200 A AC, 10 kA DC) and lower melting I²t (0.2191), indicating faster response to overcurrent conditions. Approval certifications include cURus and PSE/JET. Current inventory: 888 pieces.

Frequently Asked Questions (FAQ)

Q: Can TR/PCB-3-R be used as a direct replacement for TR/PCB-3-SD?

A: Yes. The TR/PCB-3-R is a direct equivalent substitute. Both parts share identical electrical specifications (3 A, 250 V AC / 450 V DC, fast-blow), mechanical configuration (through-hole, radial package), and physical dimensions. The TR/PCB-3-R is the recommended substitute due to active product status and ROHS3 compliance.

Q: What is the key limitation of the 80813000000 substitute?

A: The 80813000000 has a maximum DC voltage rating of 350 V, compared to the TR/PCB-3-SD specification of 450 V. This part is suitable only for applications where the DC voltage does not exceed 350 V. Verify circuit DC voltage requirements before selecting this alternative.

Q: Are the physical dimensions of substitute parts compatible with the original PCB layout?

A: The TR/PCB-3-R has identical dimensions to the TR/PCB-3-SD (0.350" L x 0.184" W x 0.345" H). The 80813000000 dimensions are within acceptable tolerance (0.350" L x 0.183" W x 0.350" H), with negligible variation in width (0.001") and height (0.005"). Both substitutes are mechanically compatible with existing through-hole PCB layouts designed for the original part.

Q: What are the packaging differences between substitute parts?

A: The TR/PCB-3-SD is supplied in box packaging. The TR/PCB-3-R is supplied in Cut Tape (CT) packaging. The 80813000000 is supplied in Tape & Box (TB) packaging. Packaging format does not affect electrical or mechanical compatibility; it impacts only handling, storage, and automated assembly considerations.

Q: Are there compliance or certification differences between the substitutes?

A: The TR/PCB-3-SD and TR/PCB-3-R carry CSA and UL approvals. The 80813000000 carries cURus and PSE/JET approvals. Both certification sets are recognized standards for board mount fuses. Verify that your application requirements align with the specific certification body requirements for your region or industry.

Q: Why does the 80813000000 have a lower melting I²t value?

A: The 80813000000 has a melting I²t of 0.2191 compared to 0.75 for the TR/PCB-3-SD. This indicates the Littelfuse part responds faster to overcurrent conditions and reaches its melting point with less accumulated thermal energy. This is a characteristic difference between manufacturers and product series; it does not indicate incompatibility but reflects different thermal response profiles.

Q: Can the TR/PCB-3-SD be used in new designs?

A: No. The TR/PCB-3-SD carries obsolete product status. For new designs, use the TR/PCB-3-R (active status, ROHS3 compliant) as the primary selection. The 80813000000 may be considered as an alternative if DC voltage requirements do not exceed 350 V.