Equivalent & Substitute Parts for BK/PCH-1 Board Mount Fuse

Part Overview

The BK/PCH-1 is a 1 A, 250 V AC / 450 V DC board mount fuse manufactured by Eaton - Electronics Division as part of the PC-Tron® series. This component is classified as obsolete, with 1044 pieces currently in stock. The fuse features fast blow response characteristics and is designed for through-hole radial mounting in a box package configuration.

Due to the obsolete product status of BK/PCH-1, equivalent substitute parts from the same manufacturer series are available. These substitutes maintain identical electrical and mechanical specifications while offering active product status and improved compliance certifications, including RoHS3 compliance.

Key Parameters

Parameter	Value
Current Rating	1 A
Voltage Rating - AC	250 V
Voltage Rating - DC	450 V
Response Time	Fast Blow
Fuse Type	Board Mount (Cartridge Style Excluded)
Mounting Type	Through Hole
Package / Case	Radial, Box
Size / Dimension	0.350" L x 0.184" W x 0.345" H (8.89mm x 4.67mm x 8.76mm)
Breaking Capacity @ Rated Voltage	50A AC, 5.9kA DC
Melting I²t	0.02
Approval Agency	CSA, UL
Series	PC-Tron®

Substitute Part Grouping Explanation

Substitution for BK/PCH-1 is determined by strict equivalence across all electrical and mechanical parameters. The following criteria establish direct substitutability:

Electrical Parameters (Must Match Exactly):

Current Rating: 1 A
Voltage Rating - AC: 250 V
Voltage Rating - DC: 450 V
Response Time: Fast Blow
Breaking Capacity @ Rated Voltage: 50A AC, 5.9kA DC
Melting I²t: 0.02

Mechanical Parameters (Must Match Exactly):

Fuse Type: Board Mount (Cartridge Style Excluded)
Mounting Type: Through Hole
Package / Case: Radial, Box
Size / Dimension: 0.350" L x 0.184" W x 0.345" H (8.89mm x 4.67mm x 8.76mm)

Certification Requirements:

Approval Agency: CSA, UL

All substitute parts listed below meet these criteria and are manufactured by Eaton - Electronics Division within the PC-Tron® series. Substitutes differ only in product status (active vs. obsolete) and RoHS compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Current Rating	Voltage AC	Voltage DC	Response Time	Mounting Type	Package	Size (mm)	Breaking Capacity	Melting I²t	Product Status	RoHS Status	Inventory
BK/PCH-1	Eaton	1 A	250 V	450 V	Fast Blow	Through Hole	Radial, Box	8.89 x 4.67 x 8.76	50A AC, 5.9kA DC	0.02	Obsolete	Non-compliant	1044 Pcs
BK/PCH-1-R	Eaton	1 A	250 V	450 V	Fast Blow	Through Hole	Radial, Box	8.89 x 4.67 x 8.76	50A AC, 5.9kA DC	0.02	Active	ROHS3 Compliant	803 Pcs
PCH-1-R	Eaton	1 A	250 V	450 V	Fast Blow	Through Hole	Radial, Box	8.89 x 4.67 x 8.76	50A AC, 5.9kA DC	0.02	Active	ROHS3 Compliant	888 Pcs
BK/PCB-1-R	Eaton	1 A	250 V	450 V	Fast Blow	Through Hole	Radial, Box	8.89 x 4.67 x 8.76	50A AC, 5.9kA DC	0.02	Active	ROHS3 Compliant	4046 Pcs
BK/PCC-1-R	Eaton	1 A	250 V	450 V	Fast Blow	Through Hole	Radial, Box	8.89 x 4.67 x 8.76	50A AC, 5.9kA DC	0.02	Active	ROHS3 Compliant	6550 Pcs
BK/PCF-1-R	Eaton	1 A	250 V	450 V	Fast Blow	Through Hole	Radial, Box	8.89 x 4.67 x 8.76	50A AC, 5.9kA DC	0.02	Active	ROHS3 Compliant	1065 Pcs
PCB-1-R	Eaton	1 A	250 V	450 V	Fast Blow	Through Hole	Radial, Box	8.89 x 4.67 x 8.76	50A AC, 5.9kA DC	0.02	Active	ROHS3 Compliant	798 Pcs
PCC-1-R	Eaton	1 A	250 V	450 V	Fast Blow	Through Hole	Radial, Box	8.89 x 4.67 x 8.76	50A AC, 5.9kA DC	0.02	Active	ROHS3 Compliant	767 Pcs
PCF-1-R	Eaton	1 A	250 V	450 V	Fast Blow	Through Hole	Radial, Box	8.89 x 4.67 x 8.76	50A AC, 5.9kA DC	0.02	Active	ROHS3 Compliant	686 Pcs

Engineering Selection Recommendations

All substitute parts listed are direct parametric equivalents to BK/PCH-1 and are suitable for replacement in applications requiring a 1 A, 250 V AC / 450 V DC fast blow board mount fuse with through-hole radial mounting.

Primary Advantage of Substitutes: All substitute parts carry active product status, whereas BK/PCH-1 is obsolete. Additionally, all substitutes are ROHS3 compliant, compared to the non-compliant status of the original part. Both factors support long-term supply chain reliability and regulatory compliance.

Selection Based on Availability:

BK/PCC-1-R: 6550 pieces in stock (highest availability)
BK/PCB-1-R: 4046 pieces in stock
PCC-1-R: 767 pieces in stock
PCH-1-R: 888 pieces in stock
BK/PCF-1-R: 1065 pieces in stock
PCF-1-R: 686 pieces in stock
PCB-1-R: 798 pieces in stock
BK/PCH-1-R: 803 pieces in stock

All substitute parts maintain identical electrical performance, mechanical fit, and certification requirements (CSA, UL approval). Selection among substitutes may be based on inventory availability and internal part numbering conventions.

Frequently Asked Questions (FAQ)

Q: Can BK/PCH-1 be directly replaced with any of the listed substitute parts?

A: Yes. All substitute parts are parametric equivalents with identical electrical ratings (1 A, 250 V AC, 450 V DC), response characteristics (fast blow), mechanical dimensions (0.350" L x 0.184" W x 0.345" H), and mounting configuration (through-hole radial, board mount). Direct substitution is supported without circuit modification.

Q: What is the difference between BK/PCH-1 and BK/PCH-1-R?

A: Both parts are electrically and mechanically identical. The primary differences are: BK/PCH-1 is obsolete with RoHS non-compliant status, while BK/PCH-1-R is active with ROHS3 compliance. BK/PCH-1-R is the recommended replacement for new designs and ongoing production.

Q: Are all substitute parts certified to the same standards?

A: Yes. All substitute parts carry CSA and UL approval certifications identical to the original BK/PCH-1 part. Certification compliance is maintained across all equivalents.

Q: Does the part number prefix (BK/, PC-) affect electrical or mechanical compatibility?

A: No. The prefix variations (BK/PCH-1-R, PCH-1-R, BK/PCB-1-R, PCB-1-R, etc.) represent internal manufacturer designations and packaging conventions. All parts with identical electrical and mechanical specifications are fully interchangeable in circuit applications.

Q: What is the melting I²t value and why is it important for substitution?

A: The melting I²t value of 0.02 defines the thermal energy required to melt the fuse element. This parameter must match exactly for proper circuit protection coordination. All listed substitutes maintain this identical value, ensuring equivalent protection characteristics.

Q: Can these fuses be used in both AC and DC applications?

A: Yes. All parts are rated for 250 V AC and 450 V DC operation. The breaking capacity differs between AC (50A) and DC (5.9kA) due to the different electrical characteristics of each current type. Application selection must respect the appropriate voltage and current rating for the specific use case.

Q: Is RoHS3 compliance required for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and many other regulated markets. All substitute parts are ROHS3 compliant, whereas the original BK/PCH-1 is not. If your application or supply chain requires RoHS compliance, substitute parts are necessary.

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