Equivalent & Substitute Parts for Eaton BK/PCH-2 Board Mount Fuse

Part Overview

The Eaton BK/PCH-2 is a 2 A, 250 V AC / 450 V DC board mount fuse with fast blow response time, designed for through-hole radial mounting in the PC-Tron® series. This part is classified as obsolete, with 795 pieces currently in stock. Due to its obsolete status, equivalent substitute parts from both Eaton and alternative manufacturers are necessary to ensure design continuity and procurement flexibility for new production runs and field replacements.

Key Parameters

Parameter	Value
Current Rating	2 A
Voltage Rating - AC	250 V
Voltage Rating - DC	450 V
Response Time	Fast Blow
Mounting Type	Through Hole
Fuse Type	Board Mount (Cartridge Style Excluded)
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)
Approval Agency	CSA, UL

Substitute Part Grouping Explanation

Substitute parts for the BK/PCH-2 are classified into two categories based on manufacturer and product status:

Direct Eaton Substitutes (Active Status): Parts BK/PCH-2-R, PCH-2-R, BK/PCB-2-R, BK/PCC-2-R, BK/PCF-2-R, PCB-2-R, PCC-2-R, and PCF-2-R maintain identical electrical specifications (2 A, 250 V AC, 450 V DC, fast blow response) and mechanical dimensions. These parts are active products with ROHS3 compliance, addressing the obsolete status of the original BK/PCH-2. The primary distinction among Eaton substitutes is packaging format (bulk vs. box) and internal design variations within the PC-Tron® series.

Cross-Manufacturer Substitutes (Littelfuse): Parts 80812000075 and 80812000440 from Littelfuse Inc. (TE5® 808 series) match the core electrical parameters (2 A, 250 V AC, 450 V DC, fast blow) and mechanical envelope. These parts feature enhanced breaking capacity (100 A AC, 10 kA DC versus 50 A AC, 5.9 kA DC) and lower melting I²t (0.061 versus 0.2), with operating temperature range of -40°C to 125°C and cULus certification.

Substitution Criteria: All substitute parts share the following mandatory parameters with BK/PCH-2:

Current Rating: 2 A
Voltage Rating - AC: 250 V
Voltage Rating - DC: 450 V
Response Time: Fast Blow
Mounting Type: Through Hole
Package / Case: Radial, Box
Approval Agencies: CSA, UL, or cULus

Parameter Comparison

Part Number	Manufacturer	Current (A)	Voltage AC (V)	Voltage DC (V)	Response Time	Breaking Capacity AC	Breaking Capacity DC	Melting I²t	Product Status	RoHS Status
BK/PCH-2	Eaton	2	250	450	Fast Blow	50 A	5.9 kA	0.2	Obsolete	Non-compliant
BK/PCH-2-R	Eaton	2	250	450	Fast Blow	50 A	5.9 kA	0.2	Active	ROHS3 Compliant
PCH-2-R	Eaton	2	250	450	Fast Blow	50 A	5.9 kA	0.2	Active	ROHS3 Compliant
BK/PCB-2-R	Eaton	2	250	450	Fast Blow	50 A	5.9 kA	0.2	Active	ROHS3 Compliant
BK/PCC-2-R	Eaton	2	250	450	Fast Blow	50 A	5.9 kA	0.2	Active	ROHS3 Compliant
BK/PCF-2-R	Eaton	2	250	450	Fast Blow	50 A	5.9 kA	0.2	Active	ROHS3 Compliant
PCB-2-R	Eaton	2	250	450	Fast Blow	50 A	5.9 kA	0.2	Active	ROHS3 Compliant
PCC-2-R	Eaton	2	250	450	Fast Blow	50 A	5.9 kA	0.2	Active	ROHS3 Compliant
PCF-2-R	Eaton	2	250	450	Fast Blow	50 A	5.9 kA	0.2	Active	ROHS3 Compliant
80812000075	Littelfuse	2	250	450	Fast Blow	100 A	10 kA	0.061	Active	ROHS3 Compliant
80812000440	Littelfuse	2	250	450	Fast Blow	100 A	10 kA	0.061	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Eaton PC-Tron® Series): Parts BK/PCH-2-R, PCH-2-R, BK/PCB-2-R, BK/PCC-2-R, BK/PCF-2-R, PCB-2-R, PCC-2-R, and PCF-2-R are functionally equivalent to the obsolete BK/PCH-2. All Eaton substitutes maintain identical electrical performance and mechanical dimensions while offering active product status and ROHS3 compliance. Selection among these variants should be based on internal design requirements and packaging availability. These parts carry CSA and UL approvals consistent with the original specification.

For Cross-Manufacturer Substitution (Littelfuse TE5® 808 Series): Parts 80812000075 and 80812000440 provide electrical equivalence with enhanced performance characteristics. The higher breaking capacity (100 A AC, 10 kA DC) and lower melting I²t (0.061) offer improved fault tolerance in applications where the original 50 A AC / 5.9 kA DC breaking capacity may be marginal. These parts are certified to cULus standards and feature an operating temperature range of -40°C to 125°C. The mechanical envelope remains compatible with through-hole radial mounting.

Compliance Considerations: All substitute parts are ROHS3 compliant and carry appropriate regulatory approvals (CSA, UL, or cULus). The original BK/PCH-2 is RoHS non-compliant; migration to any active substitute addresses regulatory requirements for new designs and procurement.

Frequently Asked Questions (FAQ)

Q: Can I use any of the Eaton PC-Tron® variants (BK/PCH-2-R, PCH-2-R, BK/PCB-2-R, etc.) interchangeably with the original BK/PCH-2?

A: Yes. All Eaton PC-Tron® substitutes listed maintain identical electrical ratings (2 A, 250 V AC, 450 V DC), response time (fast blow), and mechanical dimensions (0.350" L x 0.184" W x 0.345" H). The variants differ in internal design and packaging format but are electrically and mechanically interchangeable for board mount through-hole applications.

Q: What is the difference between Eaton and Littelfuse substitutes?

A: Eaton substitutes (BK/PCH-2-R series and variants) maintain the original breaking capacity specification (50 A AC, 5.9 kA DC). Littelfuse TE5® 808 parts (80812000075, 80812000440) provide higher breaking capacity (100 A AC, 10 kA DC) and lower melting I²t (0.061 versus 0.2), with an extended operating temperature range (-40°C to 125°C). Both manufacturers' parts meet the core electrical requirements and are ROHS3 compliant.

Q: Are the mechanical dimensions identical across all substitutes?

A: Eaton substitutes maintain the original dimension specification of 0.350" L x 0.184" W x 0.345" H (8.89mm x 4.67mm x 8.76mm). Littelfuse parts have dimensions of 0.350" L x 0.183" W x 0.350" H (8.90mm x 4.65mm x 8.90mm), representing a negligible variation in width and height that does not affect through-hole radial mounting compatibility.

Q: Which substitute should I select for new production designs?

A: For new designs requiring direct equivalence to the original BK/PCH-2, select any active Eaton PC-Tron® variant (BK/PCH-2-R, PCH-2-R, BK/PCB-2-R, BK/PCC-2-R, BK/PCF-2-R, PCB-2-R, PCC-2-R, or PCF-2-R). All are active products with ROHS3 compliance and CSA/UL certification. For applications where enhanced breaking capacity and lower melting I²t provide design margin, Littelfuse 80812000075 or 80812000440 are suitable alternatives with cULus certification.

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

A: Melting I²t defines the thermal energy required to melt the fuse element. The original BK/PCH-2 has a melting I²t of 0.2, while Littelfuse substitutes have 0.061. Lower melting I²t indicates faster thermal response to overcurrent conditions. For applications with specific thermal coordination requirements, the melting I²t value must be evaluated against circuit protection design parameters.

Q: Are all substitutes certified to the same regulatory standards?

A: Eaton substitutes carry CSA and UL approvals. Littelfuse substitutes carry cULus certification (combined CSA and UL approval). All substitutes are ROHS3 compliant. The regulatory approvals are equivalent for board mount fuse applications in industrial and commercial equipment.

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