Equivalent & Substitute Parts for PCH-3/4-R

Part Overview

The PCH-3/4-R is a 750 mA, 250 V AC / 450 V DC board mount fuse manufactured by Eaton - Electronics Division. This fast-blow fuse is designed for through-hole radial mounting in a box package configuration and is part of the PC-Tron® series. The component holds Active product status with CSA and UL approval certifications. Substitute parts are identified based on matching electrical ratings, mechanical dimensions, mounting characteristics, and regulatory compliance to ensure direct functional equivalence in circuit protection applications.

Substiute Parts

PCH-3/4-R

Eaton - Electronics DivisionIn Stock: 1010PCH-3/4-R Datasheet

Current PartRFQ

BK/PCB-3/4-R

Eaton - Electronics DivisionIn Stock: 2006BK/PCB-3/4-R Datasheet

Parametric EquivalentRFQ

BK/PCC-3/4-R

Eaton - Electronics DivisionIn Stock: 1580BK/PCC-3/4-R Datasheet

Parametric EquivalentRFQ

PCB-3/4-R

Eaton - Electronics DivisionIn Stock: 1029PCB-3/4-R Datasheet

Parametric EquivalentRFQ

7100.1164.13

SCHURTER Inc.In Stock: 13437100.1164.13 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCH-3/4-R are classified into two categories based on parametric equivalence:

Parametric Equivalents (Direct Substitutes): Parts BK/PCB-3/4-R, BK/PCC-3/4-R, and PCB-3/4-R are classified as parametric equivalents. These parts match all critical electrical parameters: 750 mA current rating, 250 V AC / 450 V DC voltage ratings, fast-blow response time, 50A AC / 5.9kA DC breaking capacity, and 0.016 melting I²t value. Mechanical specifications are identical, including through-hole radial mounting, box package configuration, and physical dimensions of 0.350" L x 0.184" W x 0.345" H. All three parts are manufactured by Eaton - Electronics Division within the PC-Tron® series and hold Active product status with CSA and UL certifications. These parts are interchangeable without circuit redesign.

Similar Part (Limited Substitution): Part 7100.1164.13 manufactured by SCHURTER Inc. is classified as a similar part with parameter deviations. While this part shares the same mounting type (through-hole radial, box package), fuse type (board mount), response time (fast-blow), and approval certifications (cURus), it differs in critical electrical parameters. The current rating is 800 mA (versus 750 mA), DC voltage rating is 250 V (versus 450 V), breaking capacity is 35A (versus 50A AC / 5.9kA DC), melting I²t is 0.21 (versus 0.016), and physical dimensions are 0.453" L x 0.197" W x 0.315" H (versus 0.350" L x 0.184" W x 0.345" H). This part operates across -40°C to 85°C. Substitution requires circuit analysis to confirm compatibility with the application's voltage and current requirements.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: Parts BK/PCB-3/4-R, BK/PCC-3/4-R, and PCB-3/4-R are suitable for direct replacement of PCH-3/4-R without circuit modification. All three parts maintain identical electrical specifications, mechanical dimensions, and regulatory certifications (CSA, UL). Selection among these three parametric equivalents may be based on inventory availability or procurement lead time, as they are functionally interchangeable.

For Alternative Consideration: Part 7100.1164.13 from SCHURTER Inc. requires application-level analysis before substitution. The reduced DC voltage rating (250 V versus 450 V) and lower breaking capacity (35A versus 50A AC / 5.9kA DC) restrict its use to circuits operating within these lower specifications. The higher melting I²t value (0.21 versus 0.016) indicates slower thermal response, which may affect circuit protection timing. Physical dimension differences require PCB layout verification. This part is suitable only when circuit requirements align with its reduced electrical parameters and the application can accommodate the dimensional variance.

Frequently Asked Questions (FAQ)

Q: Can BK/PCB-3/4-R, BK/PCC-3/4-R, and PCB-3/4-R be used interchangeably with PCH-3/4-R?

A: Yes. These three parts are parametric equivalents with identical current ratings (750 mA), voltage ratings (250 V AC / 450 V DC), response time (fast-blow), breaking capacity (50A AC / 5.9kA DC), melting I²t (0.016), physical dimensions, and regulatory certifications. They are direct substitutes requiring no circuit redesign.

Q: What are the limitations of using 7100.1164.13 as a substitute?

A: The 7100.1164.13 has a reduced DC voltage rating of 250 V compared to the PCH-3/4-R's 450 V DC rating. It also has lower breaking capacity (35A versus 50A AC / 5.9kA DC) and higher melting I²t (0.21 versus 0.016). Physical dimensions differ, requiring PCB layout verification. Substitution is limited to applications where circuit voltage and current requirements do not exceed these lower specifications.

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

A: BK/PCB-3/4-R, BK/PCC-3/4-R, and PCB-3/4-R share identical dimensions with PCH-3/4-R (0.350" L x 0.184" W x 0.345" H), ensuring mechanical compatibility. The 7100.1164.13 has different dimensions (0.453" L x 0.197" W x 0.315" H) and requires PCB footprint verification before substitution.

Q: Do all substitute parts hold the same regulatory certifications?

A: BK/PCB-3/4-R, BK/PCC-3/4-R, and PCB-3/4-R hold CSA and UL certifications matching PCH-3/4-R. The 7100.1164.13 holds cURus certification, which differs from the original part's certification body. Both certification schemes are recognized, but application-specific requirements may dictate which certification is required.

Q: What is the significance of the melting I²t parameter in fuse selection?

A: Melting I²t determines the thermal energy required to melt the fuse element and is critical for circuit protection timing. PCH-3/4-R and its parametric equivalents have a melting I²t of 0.016, while 7100.1164.13 has 0.21. The higher value in the SCHURTER part indicates slower thermal response, which may affect protection characteristics in fast-transient applications.

Q: Can PCH-3/4-R be used in applications requiring 250 V DC operation?

A: Yes. PCH-3/4-R is rated for 450 V DC, which exceeds 250 V DC requirements. All parametric equivalents (BK/PCB-3/4-R, BK/PCC-3/4-R, PCB-3/4-R) share this 450 V DC rating. The 7100.1164.13 is rated for 250 V DC only and is suitable for applications not exceeding this voltage.